检索结果-内蒙古大学图书馆

Dual template using P123-gelatin for synthesized large mesoporous silica for enhanced adsorption of dyes

South African Journal of chemical engineering 2023年 43卷 312-326页

作者： Safitri, Widiya Nur Habiddin, Habiddin Ulfa, Maria Trisunaryanti, Wega Bahruji, Hasliza Holilah, Holilah Rohmah, Alya Awinatul Sholeha, Novia Amalia Jalil, Aishah Abdul Santoso, Eko Prasetyoko, Didik Department of Chemistry Faculty of Science and Data Analytics Institut Teknologi Sepuluh Nopember East Java Keputih Sukolilo Surabaya 60111 Indonesia Chemistry Education Study Program Faculty of Teacher Training and Education Universitas Sebelas Maret Jl. Ir. Sutami 36A Surakarta 57126 Indonesia Department of Chemistry Faculty of Science Universitas Gadjah Mada Sekip Utara Sleman Indonesia Centre for Advanced Material and Energy Sciences Universiti Brunei Darussalam Bandar Seri Begawan BE 1410 Brunei Darussalam Research Center for Biomass and Bioproducts National Research and Innovation Agency of Indonesia (BRIN) Cibinong 16911 Indonesia Department of Food Science and Technology Faculty of Agriculture Halu Oleo University Indonesia College of Vocational Studies Bogor Agricultural University (IPB University) Jalan Kumbang No. 14 Bogor 16151 Indonesia Department of Chemical Engineering Faculty of Chemical and Energy Engineering Universiti Teknologi Malaysia 81310 UTM Johor Skudai Johor Bahru Malaysia

Mesoporous Silica with a large mesopore channel was synthesized using the sol-gel method for dye adsorption. A dual template consisting of P123 and gelatin at different ratios was employed in the sol-gel synthesis to enhance surface area and mesopore diameter. Gelatin is a green pore directing agent that strengthens P123 thermal stability during the calcination of silicate gel. Optimization of P123:gelatin ratio to 1:0.02 increased the surface area of mesoporous silica to 561.9 m²/g and expanded the pore diameter to 10 nm. The large pore diameter and surface area enhanced methylene blue adsorption capacity to 363.63 mg/g. The adsorption of methylene blue on mesoporous silica follows the pseudo second-order kinetic and the Langmuir model. Regeneration studies using thermal and chemical treatments exhibited the potential of mesoporous silica as an adsorbent for multiple adsorption-desorption of dyes. © 2022 The Author(s)

关键词： Dual template Dye Gelatin Mesoporous silica Pluronic P123

来源：评论

学校读者我要写书评

暂无评论

Effect of the number of Cyperus rotundus and medium height on the performance of batch-constructed wetland in treating aquaculture effluent

引用

Chemosphere 2024年 353卷 141595页

作者： Imron, Muhammad Fauzul Hestianingsi, Wa Ode Ayu Putranto, Trisnadi Widyaleksono Catur Citrasari, Nita Abdullah, Siti Rozaimah Sheikh Hasan, Hassimi Abu Kurniawan, Setyo Budi Study Program of Environmental Engineering Department of Biology Faculty of Science and Technology Universitas Airlangga Campus C UNAIR Jalan Mulyorejo Surabaya60115 Indonesia Department of Water Management Faculty of Civil Engineering and Geosciences Delft University of Technology Stevinweg 1 CN Delft 2628 Netherlands Department of Chemical and Process Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia UKM Bangi Selangor 43600 Malaysia Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia UKM Bangi Selangor 43600 Malaysia Laboratory of Algal Biotechnology Centre Algatech Institute of Microbiology of the Czech Academy of Sciences Opatovický mlýn Novohradská 237 Třeboň379 81 Czech Republic

Increasing aquaculture cultivation produces large quantities of wastewater. If not handled properly, it can have negative impacts on the environment. Constructed wetlands (CWs) are one of the phytoremediation methods that can be applied to treat aquaculture effluent. This research was aimed at determining the performance of Cyperus rotundus in removing COD, BOD, TSS, turbidity, ammonia, nitrate, nitrite, and phosphate from the batch CW system. Treatment was carried out for 30 days with variations in the number of plants (10, 15, and 20) and variations in media height (10, 12, and 14 cm). The result showed that aquaculture effluent contains high levels of organic compounds and nutrients, and C. rotundus can grow and thrive in 100% of aquaculture effluent. Besides that, the use of C. rotundus in CWs with the effect of numbers of plants and media height showed performance of COD, BOD, TSS, turbidity, ammonia, nitrate, nitrite, and phosphate with 70, 79, 90, 96, 64, 82, 92, and 48% of removal efficacy, respectively. There was no negative impact observed on C. rotundus growth after exposure to aquaculture effluent, as indicated by the increase in wet weight, dry weight, and growth rate when compared to the control. Thus, adding aquaculture effluent to CWs planted with C. rotundus supports the growth and development of plants while also performing phytoremediation. © 2024 Elsevier Ltd

关键词： Wetlands

来源：评论

学校读者我要写书评

暂无评论

Growth and carrageenan content of red algae, Kappahycus alvarezii (doty) doty different varieties farming using different methods and different habitats in Bolok waters, Kupang Regency

引用

AIP Conference Proceedings 2024年第1期3073卷

作者： Wilson L. Tisera Hildegardus Asa Lienda A. Handojo Rockie R. L. Supit Alfred G. O. Kase Donny M. Bessie Dewi Setiyowati Gadi Ima D. Saleky Vania R. T. Tisera Faculty of Fisheries and Marine Science Artha Wacana Christian University Kupang – Indonesia Chemical Engineering Study Program Institut Teknologi Bandung Bandung - Indonesia

Red algae (Rhodophyceae) Kappaphycus alvarezii is a species of macroalgae/seaweed that produces kappa-carrageenan which is intensively used in many industries. K. alvarezii is currently a leading commodity in the province of NTT because it makes a significant contribution to the income of the community and the region. The growth and content of carrageenan are strongly influenced by environmental conditions, especially related to farming habitat. The aimed of the study were to analyze the growth and carrageenan content of K. alvarezii different varieties cultured using different method and different habitat. For growth data, samples were taken every 7 days for 49 days (7 weeks), for each variety, method, and habitat. Sampling was carried out with 3 (three) replications for each treatment, by taking as many as 15 bonds at random. The initial weight of the seeds used was 100 gr. For carrageenan content, dry samples were taken at random from the 49-day-old K. alvarezii harvested. Each treatment (variety, method, and habitat) was taken with 3 (three) replicates at random. The results showed that for growth, varieties of Sacol Semau and Tissue culture Rote gave better specific growth compared to the other. The plants farmed using the longline method in the sand habitat gave better growth. for carrageenan, the Tambalang green variety from tissue culture from Semau gave the highest value, namely 56.71%. longline method. For different habitats, K. alvarezii cultivated in sand habitats gave higher carrageenan content (an average of 55.15%) than in seagrass habitats. The ANOVA results showed that in terms of growth, K. alvarezii cultivated in sand habitat showed higher very significantly different (p≤0.05; p≤0.01), compared to the one with seagrass habitat; while in terms of carrageenan contents, the interaction between different varieties cultivated with different methods and habitats showed no significant effect (p≤0.05; p≤0.01).

关键词：

来源：评论

学校读者我要写书评

暂无评论

Phase equilibria and thermodynamics assessment of the Co–Fe–Nb ternary system

引用

Intermetallics 2024年 168卷

作者： Hutabalian, Yohanes Hermana, Gita Novian Laksono, Andromeda Dwi Chen, Sinn-wen Department of Chemical Engineering National Tsing Hua University Taiwan Hsinchu30013 Taiwan Research and Development Center PT. Gotion Indonesia Materials Jakarta12950 Indonesia Department of Advanced Materials Engineering Bandung Polytechnic for Manufacturing West Java Bandung40135 Indonesia Department of Materials Science and Engineering National Taiwan University of Science and Technology Taiwan Taipei10672 Taiwan Study Program of Materials and Metallurgical Engineering Institut Teknologi Kalimantan Soekarno-Hatta Street Km. 15 Karang Joang East Kalimantan Balikpapan76127 Indonesia High Entropy Materials Center National Tsing Hua University Taiwan Hsinchu30013 Taiwan

The Co–Fe–Nb materials system is a crucial material for magnetic applications. Despite its importance, the phase equilibria and thermodynamic characteristics of this ternary system have not been explored in detail. This study employs the Calphad method to model the phase equilibria of the Co–Fe–Nb ternary system. To obtain the ternary interaction parameters, the experimental data on the isothermal sections at temperatures ranging from 700 °C to 1300 °C was evaluated. These findings indicate that the Co–Fe–Nb system contains no ternary compound, and the (Co,Fe)7Nb6 phase exists as a single solid solution. Significant solubility of the third element in the binary compounds of Co2Nb (Laves C14) and Fe2Nb (Laves C15) is also observed. The results are in good agreement with the experimental data. Furthermore, a liquidus projection of the system is presented, for the first time, revealing eight primary solidification phases in the Co–Fe–Nb ternary system. © 2024

关键词： Phase equilibria

来源：评论

学校读者我要写书评

暂无评论

Application of Response Surface Methodology for Biodiesel Synthesis Optimization Through Transesterification Reaction using h-zeolite/ki Heterogeneous Catalyst

Application of Response Surface Methodology for Biodiesel Sy...

引用

International Conference on Science and Innovated engineering 2018, i-COSINE 2018

作者： Kurniasih, E. Pardi, P. Department of Chemical Engineering Study Program of Industrial Chemical Technology Politeknik Negeri Lhokseumawe Aceh Indonesia Departement of Chemical Engineering Study Program of Oil and Gas Production Politeknik Negeri Lhokseumawe Aceh Indonesia

Biodiesel production based on crude palm oil (CPO) using heterogeneous catalysts is a new hope for solving the energy crisis. One type of heterogeneous catalyst is H-Zeolite/KI synthesized from natural zeolite impregnated with 0.05% (w/v) KI compound for 2 hours. The research focuses on determining the optimum operating conditions for biodiesel production using H-zeolite/KI catalysts. As raw material used CPO which has pre-treatment through an esterification reaction using 15% H2SO4 (w/v) as catalyst, temperature 65°C, stirrer speed of 400 rpm for 2 hours to reduce the free fatty acid content of raw materials up to 40%. Optimization of biodiesel production is carried out at the transesterification reaction. The research data was designed following the Response Surface Methodology (RSM) method using 3 independent variables and 5 levels, namely the ratio of H-zeolite/KI catalyst, transesterification temperature and mole methanol: CPO ratio with coded level (-1.682), (-1), (0), (+1), (+1.682). The research results show that the optimum operating conditions of biodiesel production were at the ratio of H-zeolite/KI catalyst at 2% - 2.5% (w/w), temperature at 45°C-50°C and mole ratio of methanol: CPO at (1:6). The biodiesel product was confirmed using gas chromatography and showed ester content of 88.02%. Characteristics of biodiesel products showed flash point 130C, acid number 0.4%, glycerol free 0%, viscosity 3.6 cP, density0.879 gr/cm3. © Published under licence by IOP Publishing Ltd.

关键词： Biodiesel

来源：评论

学校读者我要写书评

暂无评论

Characterization of a thermostable-organic solvent-tolerant lipase from thermotolerant Rhizopus sp. strain PKC12B2 isolated from palm kernel cake

引用

Case Studies in chemical and Environmental engineering 2024年 9卷

作者： Riyadi, Fatimah Azizah Alam, Md Zahangir Salleh, Md Noor Salleh, Hamzah Mohd Hidayatullah, Ibnu Maulana Hara, Hirofumi Department of Chemical Engineering Faculty of Engineering Universitas Indonesia West Java Depok 16424 Indonesia Bioprocess Engineering Study Program Faculty of Engineering Universitas Indonesia West Java Depok 16424 Indonesia Research Center for Biomass Valorization Universitas Indonesia West Java Depok 16424 Indonesia Bioenvironmental Engineering Research Centre (BERC) Department of Biotechnology Engineering Faculty of Engineering International Islamic University Malaysia Kuala Lumpur 53100 Malaysia Department of Biotechnology Graduate School of Agricultural and Life Sciences The University of Tokyo 1-1-1 Yayoi Bunkyo-ku Tokyo 113-8657 Japan

In this work, a new thermostable and organic solvent-tolerant lipase produced from Rhizopus sp. strain PKC12B2 was characterized to evaluate its activity and stability toward pH, temperature, organic solvents, and surfactants. The catalytic efficiency of the produced enzyme was also analyzed through enzyme kinetics study. Produced lipase exhibits remarkable stability at pH 8.0 to pH 10.0 and shows optimum activity at pH 9.0, demonstrating alkali lipase properties. Lipase has an optimum temperature of 45 °C and possesses significant thermal stability in the temperature range between 45 and 55 °C. Exceptional enzyme stability was also demonstrated in the presence of both polar solvents, such as glycerol, isopropanol and acetone, as well as non-polar solvents, such as cyclohexane and heptane up to 30 % (v/v) solvent concentration, where the enzyme retained more than 80 % activity after 1-h pre-incubation. For methanol, ethanol, and n-octanol, the relative activity of lipase was highly stable in the presence of up to 20 % (v/v) solvent concentration. Na⁺, Zn²⁺, and Fe³⁺ ions significantly stimulate the lipase activity at a final concentration of 10 mM. Lipase also demonstrated stimulatory effects towards a broad concentration range (0.2–1 %) of surfactants Tween 80 and Triton X-100. The Linearized Michaelis-Menten model in the form of Lineweaver-Burk (R² = 0.995) and Hanes-Woolf (R² = 0.996) models was found to successfully display the enzyme kinetics, in which the former generated Km and V_max of 1.965 mM and 4.51 mM/min respectively, while the latter generated Km and V_max of 1.295 mM and 3.389 mM/min, respectively. These new enzyme attributes demonstrate its great potential in biotechnology applications, such as for detergent formulations, biodiesel production and organic synthesis industries. © 2024 The Authors

关键词： Characterization Lipase Rhizopus sp. strain PKC12B2 Thermostable-organic solvent-tolerant enzyme

来源：评论

学校读者我要写书评

暂无评论

Inter-regional electricity system’s long term planning. Case study of Jawa-Sumatera

引用

AIP Conference Proceedings 2024年第1期2838卷

作者： Hery Affandi Nadilah Reyseliani Widodo Wahyu Purwanto Energy Systems Engineering Study Program Universitas Indonesia Depok 16424 Indonesia Sustainable Energy Systems and Policy Research Cluster Chemical Engineering Department Faculty of Engineering Universitas Indonesia Depok 16424 Indonesia

This study assesses Jawa-Sumatera interregional electricity system’s long-term planning until 2050. The planning is determined based on least-cost optimization in the TIMES model. The model considers a high disparity between regions such as electricity demand, power generation infrastructure, and energy resources. There are twenty-seven technology power generations and three energy storage technologies competing in this model, the modeling also reviews the pattern of generating operations and the role of energy storage on an hourly for each region. A trading scenario was applied to plan power generation with interconnected transmission between Jawa-Sumatera by HVDC transmission. The results show power generation portfolio for BAU and the trading scenario in Jawa and Sumatra is dominated by a gas-based power plant. The trading scenario results in an increase of 70% installed capacity in Sumatera and a decrease of 23% installed capacity in Jawa, an average of 1.96 TWh of electricity is exported every hour to Jawa, a decrease in electricity production cost for Jawa from 10.69 cUSD/ kWh to 9.15 cUSD/kWh and Sumatera from 6.77 cUSD/kWh to 4.88 cUSD/kWh, an increase in renewable energy penetration especially utility-scale PV in Sumatera 19% and a reduction in emissions to 322 gCO2/kWh and required transmission capacity 43.6 GW in 2050 to distribute electricity from Sumatera to Jawa.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Aerogel sensoric nanoparticles with controlled surface area and pore structure synthesized from bagasse ash

引用

AIP Conference Proceedings 2024年第1期3077卷

作者： Nanik Astuti Rahman Masrurotul Ajiza Cindy Mutiara Septani Study Program of Chemical Engineering Faculty of Industrial Technology National Institute of Technology (ITN) Malang Malang Indonesia Department of Geodetic Engineering National Institute of Technology (ITN) Malang Malang Indonesia

Aerogel nanoparticles which originated from organic silica in bagasse ash are unique because the silanol groups present on the silica surface can be replaced with other functional groups according to the application. Another uniqueness of the aerogel nanoparticles is the large surface area and pore structure, thus making the aerogel suitable as a sensory material. The combination of the ability to adsorb and the addition of electromagnetic properties can make this material useful as a sensor. In this research, we focused on the optimization of the synthesis of aerogel-based sensors by doping nickel (Ni) nanoparticles to create a highly sensitive and selective sensor material. The synthesis of aerogel nanoparticles was carried out using ambient pressure and alkaline extraction under atmospheric conditions. The aerogel was doped by replacing the silanol group (Si-OH) with Ni. The synthesized Ni-doped aerogel possesses a combination of microporous, mesoporous, and macroporous structures which contributed to its high pore density, pore volume, and surface area. The Ni-doping provides an electromagnetic effect that enhanced the sensory properties on the surface of the aerogel. The findings suggest that the Ni-doped aerogel is a promising material for a sensor application.

关键词：

来源：评论

学校读者我要写书评

暂无评论

The influence of preparation and pretreatment on the physicochemical properties and performance of plant-based biocoagulants in treating wastewater

引用

Environmental Advances 2023年 14卷

作者： Kurniawan, Setyo Budi Ahmad, Azmi Said, Nor Sakinah Mohd Gustinasari, Kiki Abdullah, Siti Rozaimah Sheikh Imron, Muhammad Fauzul Laboratory of Algal Biotechnology Centre Algatech Institute of Microbiology of the Czech Academy of Sciences Opatovický mlýn Novohradská 237 Třeboň 379 81 Czech Republic Department of Petrochemical Engineering Politeknik Tun Syed Nasir Syed Ismail Johor Pagoh 84600 Malaysia Department of Chemical and Process Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia (UKM) Selangor Bangi 43600 Malaysia Study Program of Environmental Engineering Department of Biosystem Engineering Faculty of Agricultural Engineering Universitas Brawijaya Malang 65145 Indonesia Study Program of Environmental Engineering Department of Biology Faculty of Science and Technology Universitas Airlangga Kampus C UNAIR Jalan Mulyorejo Surabaya 60115 Indonesia Department of Water Management Faculty of Civil Engineering and Geosciences Delft University of Technology Stevinweg 1 CN Delft 2628 Netherlands

Biocoagulants have gained attention as an alternative to chemical coagulants in water and wastewater treatment due to their ability to remove pollutant parameters such as turbidity, suspended solids, color, and organic compounds. Plant-based biocoagulants are currently the most promising due to their abundant availability and reliable performance. A proper preparation of plant-based biocoagulants is required to ensure the active compounds from the plants can be extracted. Plant raw materials are prepared into biocoagulants using drying and grinding, extraction, and purification. In mechanical preparation, drying and grinding exhibit great influence on the performance of plant-based biocoagulants due to the removal of moisture and higher contact with the carrier medium during dissolution. A smaller biocoagulant's size resulted in up to 78 % higher removal of turbidity. In chemical preparation, the oil needs to be removed before extracting the active ingredients to avoid low active compound extraction yields. The defatting of Moringa oleifera seeds showed an 18 % higher protein content. Salt and alcohol extractions were mentioned as superior extraction methods to obtain carbohydrate and protein from plant-based biocoagulants compared to water extraction, with up to a 5 % increment in turbidity removal. Preparation and pretreatment protocols have a great influence on the properties and performance of plant-based biocoagulants. Further extension of research on plant-based biocoagulants should address the problems in the initial characterization of plant material, standard pretreatment and preparation protocols, and real-scale application of plant-based biocoagulants. © 2023 The Author(s)

关键词： Biocoagulant Coagulant Environmental pollution Extraction Properties Synthesis

来源：评论

学校读者我要写书评

暂无评论

Biomass waste as an alternative source of carbon and silicon-based absorbents for CO2 capturing application

引用

Chemosphere 2023年 343卷

作者： Suresh, R. Gnanasekaran, Lalitha Rajendran, Saravanan Jalil, A.A. Soto-Moscoso, Matias Khoo, Kuan Shiong Ma, Zengling Halimatul Munawaroh, Heli Siti Show, Pau Loke Departamento de Ingeniería Mecánica Facultad de Ingeniería Universidad de Tarapacá Avda. General Velásquez 1775 Arica Chile University Centre for Research & Development Department of Mechanical Engineering Chandigarh University Punjab Mohali140413 India Department of Chemical Engineering Lebanese American University Byblos Lebanon Centre of Hydrogen Energy Institute of Future Energy Johor UTM Johor Bahru81310 Malaysia Faculty of Chemical and Energy Engineering Universiti Teknologi Malaysia Johor UTM Johor Bahru81310 Malaysia Universidad Autónoma de Chile Chile Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan Taiwan Centre for Herbal Pharmacology and Environmental Sustainability Chettinad Hospital and Research Institute Chettinad Academy of Research and Education Tamil Nadu Kelambakkam603103 India Zhejiang Provincial Key Laboratory for Subtropical Water Environment and Marine Biological Resources Protection Wenzhou University Wenzhou325035 China Study Program of Chemistry Faculty of Mathematics and Science Education Universitas Pendidikan Indonesia Jalan Dr. Setiabudhi 229 Bandung40154 Indonesia Department of Chemical Engineering Khalifa University P.O. Box 127788 Abu Dhabi United Arab Emirates Department of Chemical and Environmental Engineering Faculty of Science and Engineering University of Nottingham Malaysia Jalan Broga Selangor Darul Ehsan Semenyih Malaysia

The production of low-cost solid adsorbents for carbon dioxide (CO2) capture has gained massive consideration. Biomass wastes are preferred as precursors for synthesis of CO2 solid adsorbents, due to their high CO2 adsorption efficiency, and ease of scalable low-cost production. This review particularly focuses on waste biomass-derived adsorbents with their CO2 adsorption performances. Specifically, studies related to carbon (biochar and activated carbon) and silicon (silicates and geopolymers)-based adsorbents were summarized. The impact of experimental parameters including nature of biomass, synthesis route, carbonization temperature and type of activation methods on the CO2 adsorption capacities of biomass-derived pure carbon and silicon-based adsorbents were evaluated. The development of various enhancement strategies on biomass-derived adsorbents for CO2 capture and their responsible factors that impact adsorbent's CO2 capture proficiency were also reviewed. The possible CO2 adsorption mechanisms on the adsorbent's surface were highlighted. The challenges and research gaps identified in this research area have also been emphasized, which will help as further research prospects. © 2023 Elsevier Ltd

关键词： Carbon dioxide

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：