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Arsenic removal from water and soils using pristine and modified biochars

Biochar 2022年第1期4卷 255-280页

作者： Wei Zhang Yoora Cho Meththika Vithanage Sabry M.Shaheen Jörg Rinklebe Daniel S.Alessi Chia-Hung Hou Yohey Hashimoto Piumi Amasha Withana Yong Sik Ok Korea Biochar Research Center APRU Sustainable Waste Management and Division of Environmental Science and Ecological EngineeringKorea UniversitySeoul 02841South Korea School of Environmental Science and Engineering Guangzhou UniversityGuangzhou 510006China Ecosphere Resilience Research Center Faculty of Applied SciencesUniversity of Sri JayewardenepuraNugegoda 10250Sri Lanka Sustainability Cluster University of Petroleum and Energy StudiesUttarkhandDehradunIndia The Institute of Agriculture The University of Western AustraliaCrawleyAustralia School of Architecture and Civil Engineering Institute of Foundation EngineeringWater-and Waste-ManagementLaboratory of Soil-and Groundwater-ManagementUniversity of WuppertalPauluskirchstraße742285 WuppertalGermany Department of Earth and Atmospheric Sciences University of AlbertaEdmontonAB T6G 2E3Canada Graduate Institute of Environmental Engineering National Taiwan UniversityTaipei 10617TaiwanChina Department of Bioapplications and Systems Engineering Tokyo University of Agriculture and TechnologyTokyoJapan Department of Arid Land Agriculture Faculty of MeteorologyEnvironmentand Arid Land AgricultureKing Abdulaziz University21589 JeddahSaudi Arabia Department of Soil and Water Sciences Faculty of AgricultureUniversity of Kafrelsheikh33516 Kafr El-SheikhEgypt

Arsenic(As)is recognized as a persistent and toxic contaminant in the environment that is harmful to ***,a porous carbonaceous material with tunable functionality,has been used widely as an adsorbent for remediating As-contaminated water and *** types of pristine and modified biochar are available,and significant efforts have been made toward modifying the surface of biochars to increase their adsorption capacity for *** capacity is influenced by multiple factors,including biomass pyrolysis temperature,pH,the presence of dissolved organic carbon,surface charge,and the presence of phosphate,silicate,sulfate,and microbial *** As adsorption in modified biochars is attributed to several mechanisms including surface complexation/precipitation,ion exchange,oxidation,reduction,electrostatic interactions,and surface functional groups that have a relatively higher affinity for *** biochars show promise for As adsorption;however,further research is required to improve the performance of these *** example,modified biochars must be eco-friendly,cost-effective,reliable,efficient,and sustainable to ensure their widespread application for immobilizing As in contaminated water and *** relevant research to address these issues relies on a thorough understanding of biochar modifications to *** study presents an in-depth review of pristine and modified biochars,including their production,physicochemical properties,and As adsorption ***,a comprehensive evaluation of biochar applications is provided in As-contaminated environments as a guide for selecting suitable biochars for As removal in the field.

关键词： Engineered biochar Removal mechanisms Arsenic pollution Water pollution Soil pollution

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Photocatalytic degradation of aqueous Methyl Orange using nitrogen-doped TiO_2 photocatalyst prepared by novel method of ultraviolet-assisted thermal synthesis

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Journal of environmental sciences 2018年第4期30卷 81-93页

作者： Mohsen Nasirian Mehrab Mehrvar Graduate Programs in Environmental Applied Science and Management Ryerson University Department of Chemical Engineering Ryerson University

A nitrogen-doped titanium dioxide composite photocatalyst（N–TiO2） with heterojunction structures is synthesized by three different approaches： a novel UV-assisted thermal synthesis, annealing, and microwave technique. Photocatalytic activities of synthesized photocatalysts are evaluated by the degradation of Methyl Orange under ultraviolet light types A（UV-A）, B（UV-B）, and C（UV-C）, visible light, and direct sunlight irradiation. Results show that by using N–TiO_2 photocatalyst prepared by the UV-assisted thermal synthesis and annealing, the degradation increases by 16.5% and 20.4%, respectively, compared to that by bare TiO2. The best results are obtained at a nitrogen to TiO2 mass ratio of 0.15（N：TiO2）. The enhancement of the photocatalytic activity observed in the visible range is mainly attributed to the increasing separation rate of photogenerated charge carriers. The novel UV-assisted thermal synthesis has produced encouraging results as a preparation method for the nitrogen-doped TiO2 photocatalyst; thus, further studies are recommended for process optimization, immobilization, and scale-up to evaluate its applicability in wastewater treatment.

关键词： Ultraviolet-assisted thermal synthesis N–TiO2 Photocatalysis Advanced oxidation processes

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In-Situ Raman Unveiled Nb-O-Bond-Dependency Selectivity for Methanol Electro-Oxidation at High Current Density

SSRN

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SSRN 2023年

作者： Wang, Xinlin Xiao, Chuqian Li, Yuhang Murayama, Toru Ishida, Tamao Lin, Mingyue Xiu, Guangli Shanghai Environmental Protection Key Laboratory on Environmental Standard and Risk Management of Chemical Pollutants East China University of Science and Technology Shanghai200237 China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China School of Materials Science and Engineering East China University of Science & Technology Shanghai200237 China Research Center for Hydrogen Energy-based Society Graduate School of Urban Environmental Sciences Tokyo Metropolitan University 1-1 Minami-Osawa Hachioji Tokyo192-0397 Japan School of Chemistry & Chemical Engineering Yantai University Yantai264005 China Department of Applied Chemistry for Environment Graduate School of Urban Environmental Sciences Tokyo Metropolitan University Hachioji Tokyo192-0397 Japan

Selective methanol oxidation reaction (MOR) to value-added formate can maximize the input energy utilization for water electrolysis by replacing the high onset-potential and kinetics sluggish oxygen evolution reaction. However, to date only first-row 3d transition metal oxides present the capacity of selective MOR, motivating the design of new kinds of electrocatalysts to further enhance the MOR performance. Herein, we show amorphous Nb2O5 as an efficient electrocatalyst, for the oxidation of methanol to formate, with a low operating potential of 1.47 V vs. RHE to achieve industry-relevant current densities (>100 mA cm-2) with a Faraday efficiency of ~100%. We demonstrate, via operando Raman measurements, this superior electrochemical MOR activity originated from the in-situ induced short Nb-O bonds from the amorphous structure, while the crystalline Nb2O5 fails to generate this active site resulting in a poor activity. This work may provide valuable insight for developing novel transition metal oxides for MOR catalysts. © 2023, The Authors. All rights reserved.

关键词： Electrocatalysis

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Development of Antimicrobial Peptide-loaded Hydrogels as Potential Scaffolds for Pulp-dentine Complex Regeneration: A Comparative Study

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Journal of Endodontics 2025年第5期51卷 585-593页

作者： Noohi, Parisa Abdekhodaie, Mohammad J. Nekoofar, Mohammad H. Gama, Miguel Saadatmand, Maryam Dummer, Paul M.H. Department of Chemical and Petroleum Engineering Sharif University of Technology Tehran Tehran Iran Discovery and Translational Sciences Department Leeds Institute of Cardiovascular and Metabolic Medicine School of Medicine University of Leeds West Yorkshire Leeds United Kingdom Environmental and Applied Science Management Yeates School of Graduate Studies Toronto Metropolitan University Toronto ON Canada Department of Endodontics School of Dentistry Tehran University of Medical Sciences Tehran Tehran Iran Department of Tissue Engineering School of Advanced Technologies in Medicine Tehran University of Medical Sciences Tehran Tehran Iran Department of Endodontics Bahçeşehir University School of Dentistry Istanbul Istanbul Türkiye Centre of Biological Engineering University of Minho Minho Braga Portugal School of Dentistry College of Biomedical and Life Sciences Cardiff University Wales Cardiff United Kingdom

Introduction: As a recently developed treatment modality, regeneration of the pulp-dentin-like complex via tissue engineering approaches is the focus of considerable attention. The persistence of bacteria within the root canal spaces is well known as the major challenge of dental pulp regeneration. Antimicrobial peptides (AMPs) are short peptides with inhibitory activities against a broad spectrum of microorganisms. Methods: In the present study, antimicrobial hydrogels based on 2 photo-reactive biopolymers, that is collagen methacrylate and chitosan methacrylate, and containing 2 different AMPs, that is LLKKK18 and Tet213, were used to develop a potential scaffold with antimicrobial and regenerative features. Results: The incorporation of AMPs had no significant effect on the physical, mechanical, rheological, and morphological properties of the new systems. The optimized concentration of LLKKK18 and Tet213 had appropriate antimicrobial activity against Gram-positive Enterococcus fæcalis and did not exhibit any cytotoxicity to stem cells from the apical papilla encapsulated within the hydrogels compared to the control group without AMPs. The presence of AMPs also significantly promoted migration and differentiation of stem cells from the apical papilla. In the AMP-loaded groups, greater levels of calcified nodules deposition, alkaline phosphatase, collagen type I, dentin sialophosphoprotein, dentin matrix protein 1, and vascular endothelial growth factor A mRNA gene expression, and collagen type I and dentin sialophosphoprotein protein expression were observed. Conclusions: The results indicated the potential of engineered antimicrobial collagen methacrylate/chitosan methacrylate hydrogels for application in tissue engineering-based strategies to regenerate the pulp-dentin complex. © 2025 American Association of Endodontists

关键词： Antimicrobial peptides chitosan methacrylate collagen methacrylate photo-crosslinking regenerative endodontics

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Multifunctional enzymatically crosslinked hyaluronic acid/gelatin/mesoporous bioactive glass nanocomposite hydrogel as an alendronate carrier for treating osteoporotic fractures

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International Journal of Biological Macromolecules 2025年 318卷

作者： Maryam Alizadeh Mohammad J. Abdekhodaie Department of Chemical and Petroleum Engineering Sharif University of Technology Tehran Iran Environmental and Applied Science Management Yeates School of Graduate Studies Toronto Metropolitan University Toronto Canada

This study presents an injectable nanocomposite hydrogel composed of hyaluronic acid, gelatin, and amine-functionalized mesoporous bioactive glass nanoparticles (AMBGs) for localized delivery of alendronate (ALN). Enzymatically cross-linked hyaluronic acid/gelatin hydrogels (HG) were prepared following the modification of hyaluronic acid and gelatin with tyramine. Nanocomposite hydrogels (HGB) were fabricated by incorporating varying concentrations of AMBGs into the HG hydrogel. Adding AMBGs significantly influenced the physical and biomechanical properties of the hydrogels. The hydrogel containing 0.5 % AMBGs (HGB-0.5 %) exhibited the highest compressive strength compared to the other formulations. The bioactivity and osteo-conductive properties of HGB-0.5 % hydrogel were confirmed by forming an apatite-like layer on the hydrogel surface after incubation in simulated body fluid and an ion release test. ALN was loaded into the HGB-0.5 % hydrogels with varying concentrations, and the biological activity of the resulting hydrogels was evaluated. All hydrogel groups supported the attachment and growth of the MC3T3-E1 cells cultured on hydrogels. Additionally, adding AMBGs to the hydrogels increased osteoblastic differentiation of MC3T3-E1 cells. Incorporating ALN into HGB-0.5 % hydrogels also decreased the differentiation of RAW 264.7 cells into osteoclasts. These results highlight the potential of ALN-loaded HGB-0.5 % hydrogels with osteo-induction, osteo-conduction, and anti-osteoclastogenesis properties for treating osteoporotic fractures.

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A Comprehensive Study on Ionicity Role in Desalination and Separation of Graphene Oxide Membrane

SSRN

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SSRN 2022年

作者： Oikawa, Mutsuki Takeuchi, Haruka Chikyu, Daiki Ohba, Tomonori Wang, Zheng-Ming Koura, Setsuko Research Institute of Environmental Management National Institute of Advanced Industrial Science and Technology 16-1 Onogawa Ibaraki Tsukuba305-8569 Japan Department of Applied Chemistry Faculty of Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Chiba Narashino275-0016 Japan Research Center for Environmental Quality Management Graduate School of Engineering Kyoto University 1-2 Yumihama Shiga Otsu520-0811 Japan Graduate School of Science Chiba University 1-33 Yayoi Inage Chiba263-8522 Japan

Graphene oxide membrane (GOM), as a brand-new membrane material, has recently attracted a great attention because of its exceeding potential for desalination and other water treatment applications. While ionic sieving property of GOMs was so far mainly considered based on geometrical factors (ionic/molecular sizes), ionicity roles (the polar GO surface and ionicity of permeates) have not been sufficiently addressed. In order to make a comprehensive understanding on the relationship between permeabilities and ionicity of solutes, herein a near-practical lab-scale cross-flow type apparatus was used to systematically examine separation behaviors of representative inorganic cations (alkaline and alkaline earth cations and their counter ions) and dye molecules of different ionicity or polarity by GOM. It was found that cation separations through a dried GOM of tens nanometer thickness, whose interlayer distance is considered almost unchanged under the experimental hydraulic pressure, receive strong influence from electrostatic interactions. As the result, both ionic permeation rate and water flux obey a linear increased relation with the strength of ionic power (z2/rI) but with a different slope for monovalent and bivalent cation groups. On the other hand, accumulation adsorption plays an important role in separation of organic dyes, leading to an increase in rejection but at the sacrifices of water flux due to membrane blockade. Cation separation mechanism was further understood by analysis of intercalation structure and detailed with molecular dynamic simulations. The results obtained in this research provide instructive information in terms of using GOM for various water treatment applications. © 2022, The Authors. All rights reserved.

关键词： Desalination

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Insight into Ionicity Role in Desalination and Separation of Graphene Oxide Membrane

SSRN

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SSRN 2022年

作者： Wang, Zheng-Ming Oikawa, Mutsuki Takeuchi, Haruka Chikyu, Daiki Ohba, Tomonori Koura, Setsuko Research Institute of Environmental Management National Institute of Advanced Industrial Science and Technology 16-1 Onogawa Ibaraki Tsukuba305-8569 Japan Department of Applied Chemistry Faculty of Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Chiba Narashino275-0016 Japan Research Center for Environmental Quality Management Graduate School of Engineering Kyoto University 1-2 Yumihama Shiga Otsu520-0811 Japan Graduate School of Science Chiba University 1-33 Yayoi Inage Chiba263-8522 Japan

Graphene oxide membrane (GOM), as a brand-new membrane material, has recently attracted a great attention because of its exceeding potential for desalination and other water treatment applications. While ionic sieving property of GOMs was so far mainly considered based on geometrical factors (ionic/molecular sizes), ionicity roles (the polar GO surface and ionicity of permeates) have not been sufficiently addressed. In order to make a comprehensive understanding on the relationship between permeabilities and ionicity of solutes, herein a near-practical lab-scale cross-flow type apparatus was used to systematically examine separation behaviors of representative inorganic cations (alkaline and alkaline earth cations and their counter ions) and dye molecules of different ionicity or polarity by GOM. It was found that cation separations through a dried GOM of tens nanometer thickness receives strong influence from electrostatic interactions. As the result, not only ionic permeation rate but also water flux obey a linear increased relation with the strength of ionic power (z2/rI), which is an indicator of both ionic and hydration powers, but with a different slope for monovalent and bivalent cation groups. On the other hand, accumulation adsorption either by ion-exchange or by surface stacking plays an important role in separation of organic dyes, leading to an increase in rejection but at the sacrifices of water flux due to membrane blockade. Cation separation mechanism was further understood by analysis of intercalation structure and detailed with molecular dynamic simulations. The results obtained in this research clearly show involvement of ion-exchange mechanism and the important role of ionicity in separation and can provide instructive information in terms of using GOM for various water treatment applications. © 2022, The Authors. All rights reserved.

关键词： Desalination

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Structural Metamorphosis of Graphitic Derivatives Produced from Fractionated Bamboo Lignin

ACS Sustainable Resource Management

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ACS Sustainable Resource management 2023年第1期1卷 97-113页

作者： Mohammed Abdillah Ahmad Farid Jacqueline Lease Alvin Lim Teik Zheng Toshiki Tsubota Yoshito Andou Department of Biological Functions Engineering Graduate School of Life Science and Systems Engineering Kyushu Institute of Technology 2-4 Hibikino Wakamatsu Kitakyushu Fukuoka 808-0196 Japan Department of Science and Technology Faculty of Humanities Management and Science Universiti Putra Malaysia Bintulu Sarawak 97008 Bintulu Sarawak Malaysia Department of Applied Chemistry Faculty of Engineering Kyushu Institute of Technology 1-1 Sensuicho Tobata Kitakyushu Fukuoka 804-8550 Japan Collaborative Research Centre for Green Materials on Environmental Technology Kyushu Institute of Technology 2-4 Hibikino Wakamatsu Kitakyushu Fukuoka 808-0196 Japan

The demand for sustainable and renewable materials has prompted extensive research on lignocellulosic biomass as a potential feedstock for advanced nanomaterials. This article describes the sequential processes of iron-catalyzed graphitization, improved Hummer’s method, and low-temperature thermal annealing designed to transform ethanosolv lignin into bio-based graphene products. The lignin undergoes a metamorphosis during graphitization, transforming into turbostratic crystallite with a unique flake-like configuration at high temperatures in a tightly sealed muffle furnace. Following oxidation, the structure of the resultant graphite undergoes dynamic changes, leading to exfoliation-induced distancing of the sheets of graphene layers. Notwithstanding the reduction process, the geometrical morphology of its oxidized state remains unaltered, preserving the lamellar configuration. Notably, the resulting graphitized lignin showcases a substantial carbon content exceeding 75 wt % and a relatively low oxygen content below 16 wt %. In contrast, graphene oxides (GOs) exhibit elevated oxygen levels resulting from the introduction of oxygen moieties during the oxidation step, which subsequently diminishes following thermal annealing. Diffraction patterns confirm the presence of (001), (002), and (100) planes in all graphene-based materials, indicating an aromatic ring orientation. Oxidation affects interlayer spacing with GOs exhibiting larger distances than graphitized lignin and reduced graphene oxides (rGOs). Graphitization increases the sp2carbon composition by removing volatiles and mineral matter. Oxidation increases the sp3carbon composition, but it decreases after thermal annealing due to the partial removal of oxygen species, leading to a reorientation of the sp2carbon *** research explores converting bamboo lignin into customizable graphene materials for sustainable use. The study details processes of metamorphosis, oxidation, and reduction, reveali

关键词： Anode materials Biopolymers Carbon Organic polymers Oxygen

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New Decision-Making Technique Based on Hurwicz Criteria for Fuzzy Ranking

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Computers, Materials & Continua 2022年第12期73卷 4595-4609页

作者： Deepak Sukheja Javaid Ahmad Shah G.Madhu K.Sandeep Kautish Fahad A.Alghamdi Ibrahim.S.Yahia El-Sayed M.El-Kenawy Ali Wagdy Mohamed Department of Computer Science and Engineering VNR Vignana Jyothi Institute of Engineering and TechnologyHyderabadIndia Department of Mathematics Dr.APJ Abdul Kalam University Indore(M.P)India Department of Information Technology VNR Vignana Jyothi Institute of Engineering and TechnologyHyderabadIndia LBEF Campus Kathmandu44600Nepal Department of Management Information Systems College of Applied Studies and Community ServiceImam Abdulrahman Bin Faisal UniversityDammamSaudi Arabia Laboratory of Nano-Smart Materials for Science and Technology(LNSMST) Department of PhysicsFaculty of ScienceKing Khalid UniversityP.O.Box 9004Abha 61413Saudi Arabia Research Center for Advanced Materials Science(RCAMS) King Khalid UniversityP.O.Box 9004Abha 61413Saudi Arabia Nanoscience Laboratory for Environmental and Biomedical Applications(NLEBA) Semiconductor Lab.Department of PhysicsFaculty of EducationAin Shams UniversityRoxyCairo 11757Egypt Department of Communications and Electronics Delta Higher Institute of Engineering and TechnologyMansoura35111Egypt Faculty of Artificial Intelligence Delta University for Science and TechnologyMansoura35712Egypt Operations Research Department Faculty of Graduate Studies for Statistical ResearchCairo UniversityGiza12613Egypt Department of Mathematics and Actuarial Science School of Sciences Engineering The American University in CairoEgypt

Efficient decision-making remains an open challenge in the research community,and many researchers are working to improve accuracy through the use of various computational *** this case,the fuzzification and defuzzification processes can be very *** is an effective process to get a single number from the output of a fuzzy *** defuzzification as a center point of this research paper,to analyze and understand the effect of different types of vehicles according to their *** this paper,the multi-criteria decision-making(MCDM)process under uncertainty and defuzzification is discussed by using the center of the area(COA)or ***,to find the best solution,Hurwicz criteria are used on the defuzzified ***-making technique is proposed using Hurwicz criteria for triangular and trapezoidal fuzzy *** proposed technique considers all types of decision makers’perspectives such as optimistic,neutral,and pessimistic which is crucial in solving decisionmaking problems.A simple case study is used to demonstrate and discuss the Centroid Method and Hurwicz Criteria for measuring risk attitudes among *** significance of the proposed defuzzification method is demonstrated by comparing it to previous defuzzification procedures with its application.

关键词： Defuzzification decision-making fuzzy numbers Hurwicz multicriteria decision-making ranking order

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Fully Bio-Based Modified Chitosan Nanoparticles: Towards Multiple-Functional Fire Resistant Application of Poly(Butylene Adipate-Co-Butylene Terephthalate)

SSRN

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SSRN 2024年

作者： Zhang, Qiaoqing Wu, Jingxuan Guo, Lamei Li, Meitong Uyama, Hiroshi Xu, Yu-I Nadzir, Masrina Mohd Wang, Wen Wang, Chen Fu, Dandan Tang, Wencong Wang, Junsheng Yang, Jinjun Tianjin Key Laboratory of Hazardous Waste Safety Disposal and Recycling Technology School of Environmental Science and Safety Engineering Tianjin University of Technology 391 Binshui Xidao Xiqing District Tianjin300384 China Department of Applied Chemistry Graduate School of Engineering Osaka University Osaka Suita565-0871 Japan School of Chemical Engineering Universiti Sains Malaysia Engineering Campus Nibong Tebal Pulau Pinang14300 Malaysia Tianjin Fire Research Institute of the Ministry of Emergency Management Tianjin300381 China

Poly(butylene adipate-co-butylene terephthalate) (PBAT), a biodegradable aromatic-aliphatic co-polyester, has been widely applied in food packaging, agricultural film and automobiles/building material, but shows the flammability, resulting in serious fire risk. In this work, the fully bio-based modified chitosan nanoparticles (C-CS) without halogen and phosphorus, were fabricated to obtain a novel PBAT-based composite. Upon incorporation of 3wt% C-CS, the composite (PC3) exhibited an excellent self-extinguishing capacity and achieved the V-0 highest fire safety rating. Peak of heat release rate and total heat release reduced significantly, and the amount of the char residue of PC3 increased substantially. The relatively compact and continuous char layer formed on the surface of PC3 acts as a physical barrier to suppress the heat exchange/convection/radiation and O2 entry into the matrix in the combustion process. Meanwhile, the concentration of O2 and H·/HO· free radicals would be diluted by a small portion of non-flammable gas products released in the thermal degradation process. Both condense- and gas-phase played dual roles in increasing the flame-retardant performance of PC3. In addition, the elevated crystallization capacity, anti-bacterial, anti-UV, and hydrophilic properties of PC3 were also witnessed, with slightly reduced mechanical properties. © 2024, The Authors. All rights reserved.

关键词： Fires

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