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Combined Application of Biochar and Metal-Tolerant Bacteria Alleviates Cadmium Toxicity by Modulating Antioxidant Defense Mechanism and Physio-Chemical Attributes in Rice (Oryza Sativa L.) Grown in Cadmium-Contaminated Soil.

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SSRN 2023年

作者： Ahmad, Shoaib Sehrish, Adiba Khan Zhang, Lidan Waseem, Muhammad Ullah, Inam Tabassam, Rohina Ali, Shafaqat State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu Nanjing210023 China Department of Environmental Sciences Government College University Faisalabad Faisalabad38000 Pakistan State Key Laboratory of Pharmaceutical Biotechnology School of Life Sciences Nanjing University Nanjing210023 China

Agriculture soil contamination by heavy metal (Cadmium) is widespread issue and cause deleterious effect on crops. One of the most effective and eco-friendly methods for cadmium detoxification is microbe-assisted phytoremediation and soil amended application with biochar. In this current study synergistic effect of biochar with microbes were examined. Accordingly, a pot trail was performed to studied the synergistic effect of cadmium tolerant microbes (Bacillus cereus strain B2), biochar (Parthenium hysterophorus L.) on rice grown in cadmium contaminated soil (0, 10, 15 and 20 mg/kg). In compared to non-contaminated soil, results revealed that cadmium caused damage to plant health and maximum reduction in plant biomass, gas exchange parameters and chlorophyll content were observed on cadmium 20mg/kg. Among the sole application of biochar (2%) and microbes, highest plant height (33.68 %), Photosynthetic rate (23.52%) Stomatal conductance (48.93%), water use efficiency (21.41%), transpiration rate (58.87%), chlorophyll a (74.81%), chlorophyll b (31.28%), total chl (60.53%) and carotenoids (26.97%) were recorded at combined application of biochar and microbe. Similarly, Superoxidase (SOD), Catalase (CAT), Peroxidase (POD) and Absorbate peroxidase (APX) activities were significantly boosted at combined application of microbes and biochar (2%), which were (33.90%), (24.18%), (51.70%) and (19.06%) respectively, while significant reduction was found in the ROS (16.60%), (20.06%) and MDA (26.08%) content in rice plant. However, cadmium concentration in different parts of plant were decreased at higher concentrations of biochar (2%) with microbes. These finding indicates that combined application of Bacillus cereus strain B2 and biochar could be a promising strategy to reduce rice crop cadmium toxicity and boost its growth, physiology and defense system efficiently as compared to sole applications. © 2023, The Authors. All rights reserved.

关键词： Antioxidants

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Selective Degradation of Pollutants in the Mn-Ng/Pms System: The Crucial Role of Surface Reactive Mn(Iv) Species

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SSRN 2024年

作者： Li, Ke Sun, Yibing Zhang, Xinyue Li, Hongchao Yang, Zhichao School of Environmental and Biological Engineering Nanjing University of Science and Technology 200 Xiao Ling Wei Nanjing210094 China State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China Nanjing University Nanjing210023 China

The combination of transition metal oxides with carbon-based materials is a promising strategy for constructing efficient catalysts for peroxymonosulfate (PMS) activation to degrade aqueous organic contaminants. However, the complex heterostructure of the composites often hinders the identification of the actual reactive species responsible for pollutant degradation. In this study, we integrate Mn3O4 into N-doped graphite (NG) to elucidate the mechanisms involved in the Mn-NG composite mediated PMS activation process. The Mn-NG/PMS system shows excellent performance in oxidizing bisphenol A (BPA) over a wide pH range (3.4 to 9.4) and in the presence of co-existing substrates. Mn sites in Mn3O4 are responsible for the activation of PMS, and the NG matrix enhances the dispersion of Mn in the Mn-NG composite. Multiple experimental results indicate that free radicals (i.e., hydroxyl radicals (HO•) and sulfate radicals (SO4•−)) are not generated, and surface reactive Mn(IV) is proposed as the primary reactive species for BPA oxidation. This study provides new insights into understanding the role of Mn oxides in carbon-based composites in PMS activation for degradation of organic pollutants. © 2024, The Authors. All rights reserved.

关键词： Water treatment

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Release Characteristics of Arsenic from Sediments and its source or Sink Competition With Phosphorus：A Case of a Great Lake with Grass-Algae Alternation

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SSRN 2023年

作者： Wang, Shuhang Chang, Yongsheng Huang, Wei Yang, Dianhai Che, Feifei State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University 1239 Siping Road Shanghai200092 China College of Environmental Science and Engineering Donghua University Shanghai201620 China National Engineering Laboratory for Lake Pollution Control and Ecological Restoration Chinese Research Academy of Environmental Sciences Beijing100012 China

The arsenic (As) release characteristics varied with grass-algae alternation in the great lake, and its source or sink competition with phosphorus (P) in sediments existed. Based on identification of the As release characteristics and the influence factors, the P source or sink competition responses during As release in sediments from different regions (grass-type, algae type, and grass-algae alternation areas) of the large shallow lake Taihu (China) were studied, and the contribution of sediment As release to overlying water was quantitatively analyzed. The results showed that changing trend of the values of equilibrium As concentration (EAsC0F and EAsCF) in sediments were consistent with the regional changes (0 to 28.12 ug·L-1), and the sediments from algae-type areas (west Taihu Lake, Zhushan and Meiliang Bay) had the higher values. The sediments from west Taihu Lake and Zhushan Bay had a strong source of As, while had a week source of P, and Meiliang Bay had the opposite trend of these two regions. The intense P source competition with As from the sediments occurred in algae-type areas. The lake center and southern regions (grass-type areas) had a strong As and P retention capacities, indicating a sink role of sediment with high As and P adsorption capacities. The degree of As and P saturation (DAsS and DPS) had the similar trend in sediments, and the grass-type areas had the higher values, 18.3%-21.4% and 15.31%-20.34%, respectively. The spatial distribution of As release risk index (AsRI) was decreasing as the areas changing, and P release risk index (PRI) had the irregular variation. The contribution analysis results showed that most of As release contribution was from the bottom sediments, and the surface sediments from algae-type areas contributed more to the overlying water than other region. The research results provide theoretical basis for controlling As release in sediments. © 2023, The Authors. All rights reserved.

关键词： Arsenic

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Optimizing Fouling Mitigation in Membrane Distillation By controlled Microbubble Size and Concentration

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SSRN 2024年

作者： Wang, Xuelin Wang, Xitong Xu, Chenao Ye, Yubing Ning, Rongsheng Rehman, Ratul Li, Enchao Li, Pan College of Environmental Science and Engineering Tongji University Shanghai200092 China State Key Laboratory of Pollution Control and Resource Reuse Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China Co. Ltd. 901 North Zhongshan Road Shanghai China Researsh Institute Baowu Water Technology Co. Ltd Shanghai China Shandong Jianzhu University China

Scaling control strategies play a crucial role in membrane distillation (MD) process, primarily due to the significant limitation of scaling during the scaling-up process. The utilization of microbubbles (MBs) aeration has exhibited promising potential in mitigating membrane fouling when treating high salinity wastewater. This research aims to optimizing the effect of MBs with different concentrations and sizes on membrane fouling control, we creatively used the method of releasing pressure gradiently to achieve size regulation of MBs within a certain range for the first time, firstly regulated the generation of MBs by manipulating gas flow rate and release pressure. It was observed that higher gas flow rates primarily increased MBs concentration, while lower pressures predominantly reduced MBs size through the method of inline imaging. Experimental results indicated that introduction of MBs can improve the temperature polarization coefficient and mass transfer coefficient during the treatment of NaCl solutions. Consequently, further investigations focused on the influence of MBs characteristics on different fouling control. This study provided empirical evidence that higher concentration and larger size of MBs intensify the gas-liquid two-phase flow disruption and exhibit a better shear effect on scaling phenomena, which yield advantageous outcomes in terms of augmenting permeance and water vapor production. These results were confirmed via membrane surface using scanning electron microscopy and energy dispersive spectroscopy. In summary, this research aided in identifying appropriate operating conditions for mitigating inorganic and composite scaling by implementing air-infused MBs in direct contact membrane distillation (DCMD), which provides scientific and technical guidance for controlling fouling in MD in practical applications. © 2024, The Authors. All rights reserved.

关键词： Mass transfer

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Soil particle and moisture-related factors determine landward distribution of bacterial communities in a lateral riverside continuum of the Xilin River Basin

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Soil Ecology Letters 2021年第4期3卷 303-312页

作者： Jingli Yu Jingjing Xia Qiaoli Ma Chi Zhang Ji Zhao Xininigen Tanggood Yunfeng Yang Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolia Plateau Inner Mongolia Key Laboratory of Environmental Pollution Control&Waste Resource ReuseSchool of Ecology and Environment of Inner Mongolia UniversityHohhot 010021China Ministry of Agriculture Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease College of Veterinary Medicine of Inner Mongolia Agricultural UniversityHohhot 010018China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Continuous landscape components along the lateral riverside are affected by both hydrologic connectivity and *** recent years,anthropogenic activities and climate changes have caused wetland shrinkage and land degradation along the lateral riverside of many arid and semiarid *** microorganisms are major drivers of soil biochemical cycling,it is essential to examine soil microbial communities along the lateral landscape continuum to understand their ecosystem functioning and predict future land ***,we collected samples along a lateral riverbed center-riverbed edge-oxbow lake-floodplain-terrace continuum(i.e.,landward distribution)in the Xilin River Basin,Inner Mongolia,*** floodplain had the highest microbial diversity and heterogeneity,with Bacteroidetes,β-andγ-Proteobacteria being the most abundant *** contrast,the terrace had the lowest microbial diversity and heterogeneity,with Acidobacteria,Actinobacteria,Verrucomicrobia,Gemmatimonadetes,andα-Proteobacteria as the most abundant *** particle,salinity,and moisture were the most influential factors for landward variation of bacterial communities along the riverside ***,we demonstrate that dominant bacterial lineages,soil particles,and moisture-related factors are valuable indicators of this continuum,which can be leveraged for the early prediction of drought-induced wetland shrinkage and grassland desertification.

关键词： Biogeography Landward distribution Lateral riverside continuum Hydrologic connectivity and disconnectivity Bacterial communities Combined environmental factors

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Responsive Trimodal Probes for In Vivo Imaging of Liver Inflammation by Coassembly and GSH-Driven Disassembly

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研究（英文） 2021年第1期 436-448页

作者： Yuxuan Hu Yuqi Wang Xidan Wen Yifan Pan Xiaoyang Cheng Ruibing An Guandao Gao Hong-Yuan Chen Deju Ye State Key Laboratory of Analytical Chemistry for Life Science Chemistry and Biomedicine Innovation Center (ChemBIC) School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China

Noninvasive in vivo imaging of hepatic glutathione(GSH)levels is essential to early diagnosis and prognosis of acute *** GSH-responsive fluorescence imaging probes have been reported for evaluation of hepatitis conditions,the low penetration depth of light in liver tissue has impeded reliable GSH visualization in the human *** present a liver-targeted and GSH-responsive trimodal probe(GdNPs-Gal)for rapid evaluation of lipopolysaccharide-(LPS-)induced acute liver inflammation via noninvasive,real-time in vivo imaging of hepatic GSH ***-Gal are formed by molecular coassembly of a GSH-responsive Gd(III)-based MRI probe(1-Gd)and a liver-targeted probe(1-Gal)at a mole ratio of 5/1(1-Gd/l-Gal),which shows high r1 relaxivity with low fluorescence and fluorine magnetic resonance spectroscopic(19F-MRS)*** interaction with GSH,1-Gd and 1-Gal are cleaved and GdNPs-Gal rapidly disassemble into small molecules 2-Gd,2-Gal,and 3,producing a substantial decline in rl relaxivity with compensatory enhancements in fluorescence and *** combining in vivo magnetic resonance imaging(1H-MRI)with ex vivo fluorescence imaging and l9F-MRS analysis,GdNPs-Gal efficiently detect hepatic GSH using three independent *** noninvasively visualized LPS-induced liver inflammation and longitudinally monitored its remediation in mice after treatment with an anti-inflammatory drug,dexamethasone(DEX).Findings highlight the potential of GdNPs-Gal for in vivo imaging of liver inflammation by integrating molecular coassembly with GSH-driven disassembly,which can be applied to other responsive molecular probes for improved in vivo imaging.

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Comparison of Polyamide, Polyesteramide and Polyester Nanofiltration Membranes: Properties and Separation Performance

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SSRN 2022年

作者： Fan, Kaiming Liu, Yanling Wang, Xiaoping Cheng, Peng Xia, Shengji State Key Laboratory of Pollution Control and Resources Reuse Advanced Membrane Technology Center Tongji University Shanghai200092 China Key Laboratory of Yangtze River Water Environment Ministry of Education Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security China

In this study, three different kinds of nanofiltration membranes with polyamide (PA), polyesteramide (PEA), and polyester (PE) active layers were respectively synthesized by using piperazine, serinol and meso-erythritol as the aqueous monomers for interfacial polymerization. The three types of membranes achieved comparable rejections for the reference organic solute (i.e., xylose) via optimization of preparation conditions, based on which the characteristics of different active layers were comprehensively investigated. Results showed that the PA, PEA and PE membranes exhibited distinct surface morphologies. The special surface structures of PEA membranes and the larger active layer thickness of PE membranes resulted in their lower water permeability compared to PA membranes. Different from PA active layers, the absence of positively charged regions in the PEA and PA active layers was beneficial for the passage of divalent cations and the rejection of NaCl. Moreover, despite the comparable mean pore size, PA membranes exhibited a more uniform membrane pore size resulting in a higher rejection of organic matters in natural water than PEA and PE membranes. This study presented the differences in physicochemical properties and separation performance among the different membrane active layers, which could provide references for the rational selection of nanofiltration membrane types during application. © 2022, The Authors. All rights reserved.

关键词： Nanofiltration membranes

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CRWS-mountain Project:Coordinate remediation techniques and devices for water-soil pollution in mountain areas in China

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Journal of Mountain Science 2021年第9期18卷 2441-2446页

作者： SONG Ling LI Lei ZHANG Chao-jie HUANG Li GUO Jin-song ZHU Bo ZHOU Ming-hua Key Laboratory of Mountain Surface Processes and Ecological Regulation Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment College of Environment and EcologyChongqing UniversityChongqing 400030China State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River) Ministry of Agriculture and Rural AffairsHuazhong Agricultural UniversityWuhan 430070China

Rural environmental governance is an important strategy to achieve the goal of building"green liveable villages"in ***,studies on technology and devices for pollution remediation focus mainly on urban areas;in this regard,few studies have focused on rural areas,especially mountainous or hilly areas with *** remediation techniques and devices for water-soil restoration in mountain areas(CRWS-mountain),a subproject of the"environmental monitoring and remediation in rural areas"project(ERM-rural project),was undertaken to develop techniques and devices for coordinating the restoration of water and soil in rural mountainous and hilly areas with *** CRWS-mountain project will attempt to explore the mechanisms of pollutant transportation and transformation in the interflow-soil-surface water system,establish in-situ and heterotopic remediation systems in landfill,towns and surrounding areas,and construct a comprehensive system for"polluted soilinterflow-surface water"by integrating all the technologies and devices at Yanting,a typical rural mountainous hilly area in Sichuan,Southwest *** expect that after using this comprehensive system,the water quality will meet the requirements for local water function *** operation cost is 10%lower than that of the existing urban equipment.

关键词： Coordinate remediation Interflow Drywet alteration Rural

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Remarkably efficient Pt/CeO2–Al2O3 catalyst for catalytic hydrodeiodination of monoiodoacetic acid: Synergistic effect of Al2O3 and CeO2

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Chemosphere 2023年第1期327卷

作者： Li, Minghui Li, Wen Yang, Yaning Yu, Dailiang Lin, Jingling Wan, Rui Zhu, Hongjie School of Ecology and Environment Anhui Normal University Wuhu241002 China Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical Engineering Liaocheng University Liaocheng252059 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu 210023 China

Monoiodoacetic acid (MIAA) is one of the highly toxic halogenated disinfection by-products, which is formed during water disinfection processes. Catalytic hydrogenation with supported noble metal catalyst is a green and effective technique for the transformation of halogenated pollutant, but its activity still needs to be identified. In this study, Pt nanoparticles were supported on CeO2 modified γ-Al2O3 (Pt/CeO2–Al2O3) by chemical deposition method and the synergistic effect of Al2O3 and CeO2 on catalytic hydrodeiodination (HDI) of MIAA was systematically studied. Characterizations revealed that Pt dispersion could be improved by the introduced CeO2 through the formation of Ce–O–Pt bond and MIAA adsorption could be facilitated by high Zeta potential of Al2O3 component. Furthermore, optimal Ptn+/Pt0 could be obtained by adjusting CeO2 deposition amount on Al2O3, which could effectively facilitate the activation of C–I bond. Therefore, Pt/CeO2–Al2O3 exhibited remarkable catalytic activities and TOF values compared with those of Pt/CeO2 and Pt/Al2O3. Through detailed kinetic experiments and characterization, the extraordinary catalytic performance of Pt/CeO2–Al2O3 can be attributed to the abundant Pt sites as well as the synergistic effect between CeO2 and Al2O3. © 2023

关键词： Cerium oxide

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Nano-Striped Polyamide Membranes Enabled by Vacuum-Assisted Incorporation of Hierarchical Flower-Like Mos2 for Enhanced Nanofiltration Performance

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SSRN 2022年

作者： Wang, Xiaoping Liu, Yanling Fan, Kaiming Cheng, Peng Xia, Shengji State Key Laboratory of Pollution Control and Resources Reuse Advanced Membrane Technology Center Tongji University Shanghai200092 China Key Laboratory of Yangtze River Water Environment Ministry of Education Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security China

Introducing nanomaterials into the polyamide layer of thin-film composite (TFC) membranes during interfacial polymerization process can customize the physicochemical properties of membranes and further enhance the membrane permeability without sacrificing selectivity. In this study, we prepared novel thin-film nanocomposite (TFN) nanofiltration membranes by varying the deposition density of hierarchical flower-like structured molybdenum disulfide (HF-MoS2) with the assistance of vacuum filtration. The nano-sized striped polyamide film with a decreased thickness of 30-40 nm was formed by wrapping the deposited HF-MoS2 nanoparticles, which increased the membrane effective filtration area and reduced the mass transfer resistance for water permeation. In addition, compared to the control TFC membrane, the TFN membranes possessed relatively looser polyamide layers with higher surface hydrophilicity and more negative surface charges. When the deposition density of HF-MoS2 was 10 ug/cm2, the optimal performance of the TFN membranes was obtained, i.e., a water permeability of 18.3 L m-2 h-1 bar-1 and rejections above 98% for Na2SO4 and MgSO4. Moreover, the optimal TFN membrane demonstrated an excellent separation performance and structure stability in the mixed salt solution and the long-term filtration test of 120 h, respectively. This work provides a novel approach to design high-performance TFN membranes applied for water/wastewater treatment. © 2022, The Authors. All rights reserved.

关键词： Sulfur compounds

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