Article
Engineering, Environmental
Ali H. Jawad, Ahmed Saud Abdulhameed, Lee D. Wilson, M. A. K. M. Hanafiah, W. Nawawi, Zeid A. ALOthman, Mohammad Rizwan Khan
Summary: A ternary composite containing activated charcoal and cross-linked chitosan was successfully prepared for dye removal from aqueous media. The maximum adsorption capacity for TH dye on Ch-Glu/AC was found to be 30.8 mg/g at 50 degrees C, with adsorption mechanisms involving electrostatic interactions, pi-pi interactions, and hydrogen bonding.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Engineering, Environmental
Nurul Izzati Normi, Ahmed Saud Abdulhameed, R. Razuan, Emad Yousif, Zeid A. ALOthman, Lee D. Wilson, Ali H. Jawad
Summary: In this study, chitosan was functionalized with aromatic groups using a hydrothermal technique to create a highly efficient adsorbent CHI-BZA for removing acidic dyes. The characterization results confirmed the successful grafting of aromatic rings onto chitosan backbone, and CHI-BZA exhibited mesoporous and crystalline features. The adsorption capacity of CHI-BZA for RO16 dye was found to be 228.9 mg/g.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Engineering, Environmental
Ahmed Saud Abdulhameed, Ali H. Jawad, Sivakumar Vigneshwaran, Zeid A. ALOthman, Zaher Mundher Yaseen
Summary: This study developed cross-linked chitosan composites with different TiO2 phases as adsorbents and investigated their effectiveness in removing Reactive Red 4 dye. The results showed a high removal rate for both cross-linked chitosan-epichlorohydrin/TiO2-Degussa and cross-linked chitosan-epichlorohydrin/TiO2-Anatase, suggesting their potential as adsorbents for capturing azo dyes from polluted effluents.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Engineering, Environmental
Ahmed Saud Abdulhameed, Nurul Nadiah Mohd Firdaus Hum, S. Rangabhashiyam, Ali H. Jawad, Lee D. Wilson, Zaher Mundher Yaseen, Abdullah A. Al-Kahtani, Zeid A. ALOthman
Summary: The study successfully utilized grass waste biomass to produce highly porous activated carbon with favorable adsorption properties for methylene blue dye removal. By optimizing key parameters, the activated carbon showed highest adsorption capacity at 45 degrees Celsius, and the Langmuir model accurately described the adsorption equilibrium data.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Laili Azmiati Arni, Ahmad Hapiz, Ali H. Jawad, Ahmed Saud Abdulhameed, Zeid A. ALOthman, Lee D. Wilson
Summary: A novel nanohybrid composite of magnetic chitosan-salicylaldehyde/nanoclay (MCH-SAL/NCLA) was synthesized through hydrothermal method for the removal of acid red 88 (AR88) from simulated wastewater. Response surface methodology combined with the Box-Behnken design (RSM-BBD) was used to evaluate the impact of adsorption variables on AR88 dye adsorption. The MCH-SAL/NCLA composite exhibited a maximum adsorption capacity of 173.5 mg/g for AR88 dye. It was found that the adsorption of AR88 onto the MCH-SAL/NCLA surface was influenced by various processes including electrostatic, hydrogen bonding, n-& pi;, and n-& pi; interactions. This study demonstrated that MCH-SAL/NCLA can be an effective bio-adsorbent for the removal of azo dye from contaminated wastewater.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Green & Sustainable Science & Technology
Maria Isabel Aguilar, Mercedes Llorens, Juan Francisco Ortuno, Victor Francisco Meseguer, Ana Belen Perez-Marin, Alejandro Cases
Summary: Industrial wastewater effluents containing dyes are harmful to the environment. Aloe vera leaves have been used as an effective and low-cost adsorbent for the removal of Orange II dye. The Box-Behnken factorial design and various models were applied to optimize the adsorption process and analyze the main parameters affecting the biosorption. The results showed that the pH, adsorbent dose, initial dye concentration, and contact time significantly influenced the adsorption capacity.
Article
Environmental Sciences
Luan Minh Nguyen, Ngoan Thi Thao Nguyen, Thuy Thi Thanh Nguyen, Dai Hai Nguyen, Duyen Thi Cam Nguyen, Thuan Van Tran
Summary: The global occurrence of textile dye pollution poses a serious threat to ecological systems. In this study, a novel magnetic porous CoFe2O4@MIL-53(Al) nano-composite was developed, which exhibited great adsorption capabilities for Congo red dye and dye mixtures.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Environmental
Meshari M. Aljohani, Salhah D. Al-Qahtani, Mubark Alshareef, Mohamed G. El-Desouky, Ashraf A. El-Bindary, Nashwa M. El-Metwaly, Mohamed A. El-Bindary
Summary: An environmentally friendly technique using Ag-MOF was developed for color removal from industrial wastewater. The Ag-MOF showed good adsorption properties and achieved a maximum adsorption effectiveness of 2.25 mmol/g. The study revealed that MG dye was mainly adsorbed onto Ag-MOF through electrostatic attraction forces, hydrogen bonding, ion exchange, and pore filling.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Chemistry, Multidisciplinary
Zakaria Laggoun, Amel Khalfaoui, Abderrezzaq Benalia, Amira Fadia Ghomrani, Raouf Bouchareb, Asma Mahfouf, Antonio Pizzi, Antonio Panico, Kerroum Derbal
Summary: This work optimizes the conditions for the removal of a textile dye by biosorption on seafood waste and demonstrates the acceptability of the quadratic regression model. The study also reveals the thermodynamic properties and adsorption mechanism of the process.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Hanane Souhassou, Youssef Fahoul, Imane El Mrabet, Elmustafa Iboustaten, Ouissal Assila, Loubna Nahali, Oumaima Mertah, Abdelhak Kherbeche
Summary: In this study, the potential of red clay as a low-cost and abundant adsorbent for the removal of Basic Red 29 dye from aqueous solutions was investigated. The study systematically studied and optimized key parameters such as pH, adsorbent dose, initial dye concentration, contact time, and ionic strength using response surface methodology. The results showed that red clay demonstrated superior adsorption capacity for the dye and the adsorption process followed the Langmuir isotherm model and pseudo-second-order kinetic model. The adsorption mechanism was proposed based on electrostatic interactions between dye molecules and clay surface functional groups. The regeneration experiments and germination test confirmed the effectiveness, reusability, and low toxicity of red clay as an adsorbent.
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
(2023)
Article
Engineering, Environmental
Kawthar Yahya, Mohamedou Ba, Imed Msadok, Ammar Mlayah, Ezzeddine Srasra, Noureddine Hamdi
Summary: Phosphate-loaded industrial wastewaters have caused significant environmental issues in the Gulf of Gabes-Tunisia. This study compared the phosphate adsorption capacities of two types of Tunisian activated clays and optimized the phosphate removal efficiency using response surface methodology. The results showed that both activated clays demonstrated high adsorption capacities and could be considered as a cost-effective and efficient alternative for phosphate removal from industrial wastewaters.
WATER ENVIRONMENT RESEARCH
(2022)
Article
Engineering, Environmental
Anil Kumar Giri, Prakash Chandra Mishra
Summary: This study investigates the removal of fluoride from contaminated water using a mucilage-based bio-composite in batch mode. The Box-Behnken design is successfully used to optimize the adsorption process. The effects of pH, bio-composite dosage, and experimental time on the adsorption of fluoride are systematically studied to determine the optimum conditions. The bio-composite demonstrates high adsorption efficiency for fluoride, with a maximum of 98.62% at pH 6.5, an experimental time of 70 min, a bio-composite dosage of 6 g/L, an initial fluoride concentration of 10 mg/L, and room temperature.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Nurul Izzati Normi, Ahmed Saud Abdulhameed, Ali H. Jawad, S. N. Surip, R. Razuan, Mohd Lokman Ibrahim
Summary: The present study focused on the grafting of biopolymer chitosan with an aromatic aldehyde via hydrothermal technique for the adsorption of an azo dye from water. The CHS-SA material obtained demonstrated a high adsorption capacity for the dye, and various interaction mechanisms were found to be involved in the adsorption process.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Environmental Sciences
Weigao Zhao, Chenjie Hao, Yiping Guo, Wanfei Shao, Yimei Tian, Peng Zhao
Summary: This study established the optimal conditions and effects of external factors on tetracycline adsorption by magnetic multi-walled carbon nanotubes (MMWCNTs) for the first time using a response surface methodology. The batch adsorption experiments showed that increasing the dosage and contact time effectively promoted the adsorption of tetracycline, with maximum removal of 97.93-99.13% achieved at pH 3-7. The mechanism of adsorption may involve π-π electron interaction and cation-π electron bonding, as indicated by the pseudo-second-order model and Fourier-transform infrared spectroscopy spectra. The optimization of tetracycline adsorption by magnetic multi-walled carbon nanotubes using the Box-Behnken design exhibited high significance and reliability.
Article
Chemistry, Inorganic & Nuclear
Yousef Dadban Shahamat, Mahdieh Masihpour, Parisima Borghei, Seyedeh Hoda Rahmati
Summary: This study used advanced oxidation techniques to determine the optimal conditions for removing azo red-60 dye. The results showed that the O3/UV hybrid process had excellent performance and high speed in wastewater treatment for removing azo red-60.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Environmental Sciences
P. R. Potti, V. C. Srivastava, P. Kumar, S. Das, N. Kumar, U. L. Stangar
Summary: This study synthesized Sn-doped ZnO photocatalysts using the solution combustion synthesis method and investigated the effects of different experimental parameters on the properties and degradation efficiency. The results showed that BET surface area and bandgap energy are the key factors influencing the degradation of dyes by Sn-doped ZnO.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Polymer Science
Anuj Rawat, Raeesh Muhammad, Vimal Chandra Srivastava, Paritosh Mohanty
Summary: The hypercrosslinking of benzene using formaldehyde dimethyl acetal as the crosslinker, anhydrous ferric chloride as the catalyst, and 1,2 dichloroethane as the solvent for the synthesis of poly-benz is reported. Microwave-assisted synthesis resulted in the formation of nanoporous poly-benz with a specific surface area of 1168 m2 g-1 within 60 minutes. Thorough analysis using NMR and XPS revealed the hypercrosslinking at the meta position of the benzene ring. The synthesized poly-benz showed a high CO2 capture capacity of 65.3 wt % at 298 K and 30 bar, and different adsorption isotherm models were fitted to represent the equilibrium CO2 adsorption data at various temperatures.
Article
Chemistry, Physical
Kavisha Dang, Navneet Kumar, Vimal Chandra Srivastava, Jinsub Park, Mu. Naushad
Summary: A series of CaO-MgO catalysts were prepared using different precipitating agents and Mg/Ca ratios. The physiochemical characteristics of the catalysts were analyzed using various techniques. The catalysts were tested for propylene carbonate synthesis and the effects of composition, dose, temperature, and contact time were investigated. The best catalyst achieved a high PC yield with good selectivity and reusability, showing potential for the synthesis of organic carbonates.
Article
Green & Sustainable Science & Technology
Mohammad Nasir, Praveen Kumar, Vimal Chandra Srivastava, Shilpi Verma, Ramanpreet Kaur, Indra Deo Mall, Urska Lavrencic Stangar
Summary: The adsorptive removal of 4-CBA using bagasse fly ash (BFA) was studied and compared with granular activated carbon (GAC). The optimum treatment conditions for BFA were found to be pH = 4, m = 9 g/L, Co = 100 mg/L, and t = 7.5 h, with a removal efficiency of 79% and adsorption uptake of 9.9 mg/g. BFA was determined to be a cost-effective adsorbent with high adsorption capacity and fast kinetics.
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY
(2023)
Editorial Material
Energy & Fuels
Vimal Chandra Srivastava, Hari Prakash Veluswamy, Deepak Kumar Ojha
Article
Engineering, Chemical
Surbhi Dahiya, Pankaj Kumar, Vimal Chandra Srivastava, Vimal Kumar
Summary: In the presence of specific catalysts made using the coprecipitation approach, methanol and propylene carbonate react to yield dimethyl carbonate and propylene glycol through the transesterification process. The catalytic activity of mixed Zr1-xPrxO2 was investigated towards the formation of DMC and PG, and the catalysts were characterized using SEM, FTIR spectroscopy, and CO2-TPD. DFT calculations were performed to understand the effect of combining praseodymium and zirconium on the yield and selectivity of DMC. Zr0.96Pr0.04O2 showed the highest PC conversion (95.9%), with a yield of 52.5% and selectivity of 54.7% at specific reaction conditions.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Tanveer Rasool, Vimal Chandra Srivastava, Pratik Toshniwal, Ishfaq Najar, Vikash Singh
Summary: This study evaluated the kinetic and thermodynamic parameters of co-pyrolysis of wood pellets and petroleum coke blends. It was found that the reaction order increases with increasing heating rate, and the average activation energy was calculated to be 119.6 kJ mol-1 (OFW) and 126.2 kJ mol-1 (KAS). The values for ΔH, ΔG, and ΔS were consistent with previous studies, and ΔG was observed to be around 182 kJ mol-1. The study also identified the mechanisms of diffusion and chemical reaction during the thermal degradation process.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Materials Science, Multidisciplinary
Seema Singh, Ritesh Patidar, Vimal Chandra Srivastava, Praveen Kumar, Ajay Singh, Shang-Lien Lo
Summary: In this study, ellipsoid-shaped cupric oxide (CuO) nanoparticles were synthesized using a simple hydrothermal method and subsequent heat treatment. The catalysts showed excellent peroxymonosulfate (PMS) activation ability for the degradation of perfluorooctanoic acid (PFOA). Various operating parameters were investigated, and it was found that singlet oxygen (1O2) played a key role in the oxidative-reductive mechanism of PFOA degradation. Additionally, a two-step pseudo-first-order kinetic model was proposed and minimal metal leaching was observed after repeated use.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Green & Sustainable Science & Technology
Anuj Rawat, Raeesh Muhammad, Raj K. Singh, Pratiksha Rashmi, Pratiksha Joshi, Om P. Khatri, Vimal Chandra Srivastava, Paritosh Mohanty
Summary: A sustainable method using high surface area nanoporous adsorbents synthesized from polycyclic aromatic hydrocarbons (PAHs) effectively removes polycyclic aromatic sulphur heterocycles (PASHs) from fuels. By hypercrosslinking PAHs through a microwave assisted method, nanoporous polymeric materials with high surface area (SABET of 620-1565 m2 g-1) are synthesized. The adsorbent poly-naph (highest SABET, i.e., 1565 m2 g-1) demonstrates excellent desulphurization performance from batch to fixed bed column mode. The adsorption mechanism is attributed to the π-electron density in the polymeric framework and the high surface area. This approach requires technological advancement, financial assistance and governmental regulation to sustain the control of carcinogenic aromatic pollutants.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
Vikash Singh, Seon Yeong Park, Eun Seo Lee, Jun Ho Choi, Chang Gyun Kim, Vimal Chandra Srivastava
Summary: The co-combustion characteristics and synergy of distillery effluent sludge (DES) and sugar mill waste (SMW) were studied by thermogravimetric analysis. The blend of 25% DES and 75% SMW exhibited optimal combustion parameters and the presence of Fe, Ca, and Mg in DES facilitated effective combustion. The ash from the combustion process can be considered as a possible supplementary cementing material.
ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
(2023)
Article
Engineering, Environmental
Seema Singh, Praveen Kumar, Ritesh Patidar, Vimal Chandra Srivastava, Shang-Lien Lo, Urska Lavrencic Stangar
Summary: In this study, Co3O4 nanospheres with excellent surface properties were synthesized and used for the degradation of BPA. The nano-Co3O4/PMS system effectively degraded BPA (approximately 92%) at neutral pH with low cobalt leaching and good recyclability. Chemical quenching studies confirmed the involvement of hydroxyl radicals and sulfate radicals in BPA oxidation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Seema Singh, Ritesh Patidar, Vimal Chandra Srivastava, Qicheng Qiao, Praveen Kumar, Ajay Singh, Shang-Lien Lo
Summary: This study synthesized low-toxicity and eco-friendly spherically shaped manganese oxides (alpha-MnO2, Mn2O3, and Mn3O4) using the chemical precipitation method. The variable oxidation states and diverse structures of manganese-based materials have a strong impact on electron transfer reactions. The as-prepared manganese oxides (MnOx) exhibited excellent catalytic activity for the degradation of rhodamine B (RhB) organic pollutant in the presence of peroxymonosulfate (PMS) under acidic conditions. The different oxidation states of MnOx promote oxidative-reductive reactions and the higher surface area provides ample absorption sites for pollutant interactions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Pankaj Kumar, Vimal Chandra Srivastava
Summary: The size-dependent activity of catalysts has been investigated in catalysis for a long time. Positively charged small Pt clusters exhibit higher catalytic activity compared to larger clusters and bulk for propane dehydrogenation. Computational studies were performed on small Pt clusters adsorbed on silica support, revealing their planar structures and the formation of directional bonds with the support. Ethane and propane molecules undergo dehydrogenation reactions with different activation energies depending on the size of the Pt clusters and the mechanism followed.
Review
Engineering, Environmental
Seema Singh, Ritesh Patidar, Vimal Chandra Srivastava, Shang-Lien Lo, P. V. Nidheesh
Summary: This review presents the recent advancements in the electrochemical oxidation (EO) treatment of dyes, including the basic principles, the influence of operating parameters on treatment performance, the advantages and disadvantages of various anode materials, and the degradation mechanisms of dyes. The article also discusses the scale-up application, techno-economic issues, and future research challenges.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Thermodynamics
Shailesh Pandey, Vimal Chandra Srivastava, Vimal Kumar
Summary: This study models and simulates the production of methanol from coal gasification using three coal samples with different ash percentages. The study analyzes the effect of input parameters such as steam-to-coal ratio and gasification temperature on performance parameters and optimizes these parameters for maximum methanol yield and minimum greenhouse gas emissions. Economic investigation reveals that high-ash coal performs better in terms of profitability and production costs. The findings of this study are important for countries with substantial low-grade high-ash coal reserves to achieve sustainable methanol production through coal diversification.
Article
Engineering, Chemical
Arvin Sohrabi, Mousa Meratizaman, Shuli Liu
Summary: This paper simulates and discusses possible solutions to improve the economic and technical performances of a battery-less renewable energy-powered BWRO system under real climate conditions. The study finds that the photovoltaic-based system performs better in terms of specific energy consumption and unused energy ratio.
Article
Engineering, Chemical
Chunlan Pan, Xiaoyin Hu, Vishal Goyal, Theyab R. Alsenani, Salem Alkhalaf, Tamim Alkhalifah, Fahad Alturise, Hamad Almujibah, H. Elhosiny Ali
Summary: This paper introduces a novel waste heat recovery method using the hot flue gas from a ship's engine to produce liquefied hydrogen while meeting the ship's air-conditioning requirement. A comprehensive feasibility assessment is conducted and an artificial neural network with a multiobjective grey wolf optimization method is used for optimization. The findings indicate the highest mean sensitivity index of the flash temperature and the best optimization scenario for exergy efficiency, CO2 emission reduction, and liquefied hydrogen cost.
Article
Engineering, Chemical
Daniele Chinello, Jan Post, Louis C. P. M. de Smet
Summary: In this study, PVDF-based anion-exchange membranes were designed to selectively separate nitrate from chloride. Experimental data showed that increasing the concentration of PVDF enhanced nitrate transport but also increased the membrane electrical resistance. The selectivity of nitrate was found to be independent of the membrane thickness and mainly driven by the increased affinity between the anion and the membrane.
Article
Engineering, Chemical
Umar Noor, Muhammad Fayyaz Farid, Ammara Sharif, Amna Saleem, Zubair Nabi, Muhammad Furqan Mughal, Kiran Abbas, Toheed Ahmed
Summary: Global water scarcity is increasing, and water desalination is an important solution. Multifunctional advanced materials, such as membrane materials and solar-driven desalination, play a crucial role in water desalination. Additionally, these materials can be used for water purification, wastewater treatment, and pollutant elimination.
Article
Engineering, Chemical
Emrah Gumus
Summary: With growing global concerns about climate change and environmental impacts, the use of nuclear energy in naval vessels offers a cleaner and more efficient solution to reduce emissions and address water and energy supply challenges. This study explores a novel system that combines a nuclear-driven supercritical carbon dioxide power cycle with reverse osmosis cogeneration to meet the water and electricity demands in maritime operations, enhancing the sustainability, efficiency, and self-sufficiency of naval vessels. The results indicate that the system has the potential to be a viable and effective solution for naval operations.
Article
Engineering, Chemical
Dao Thi Thanh Huyen, Saikat Sinha Ray, Young -Nam Kwon
Summary: This study focuses on the modification of a commercially available polyamide thin-film composite membrane with a zwitterionic material to enhance its fouling resistance. The modified membrane shows improved salt rejection and reduced permeability compared to the pristine membrane. Fouling tests demonstrate that the modified membrane has a lower fouling ratio and higher recovery ratio. The enhanced antifouling characteristics are attributed to the improved hydrophilicity resulting from the zwitterionic brushes and the salting-in effect.
Article
Engineering, Chemical
Niklas Koeller, Lukas Mankertz, Selina Finger, Christian J. Linnartz, Matthias Wessling
Summary: This study presents a methodology to scale up Flow-electrode Capacitive Deionization (FCDI) technology from lab-scale to pilot-scale systems. By increasing membrane area and using a stacking approach, the FCDI modules were successfully scaled up and achieved a salt transfer rate comparable to lab-scale systems. This provides a foundation for future assessments of energy demand and economics.
Article
Engineering, Chemical
Mona Gulied, Sifani Zavahir, Tasneem Elmakki, Hyunwoong Park, Guillermo Hijos Gago, Ho Kyong Shon, Dong Suk Han
Summary: This study introduces a novel hybrid system that combines direct contact membrane distillation (DCMD) and electrically switched ion exchange (ESIX) to facilitate seawater reverse osmosis (SWRO) brine enrichment and selective lithium recovery.
Article
Engineering, Chemical
Zhiqiang Zhang, Ruifeng Deng, Jiao Zhang, Lu She, Guangfeng Wei, Renyong Jia, Pengyu Xiang, Siqing Xia
Summary: A transmembrane electro-chemisorption system with authigenic acid and base was developed for enhancing ammonia recovery from strong ammonia wastewater. The system efficiently transformed ammonium into free ammonia, which was then adsorbed and recovered through transmembrane chemisorption. This system yielded pure (NH4)2SO4 product and produced valuable byproducts of pure hydrogen and oxygen. Higher applied voltage resulted in better ammonia recovery.
Article
Engineering, Chemical
Alena Popova, Sandrine Boivin, Takuji Shintani, Takahiro Fujioka
Summary: This study aimed to produce a high-integrity RO membrane by forming a polyamide skin layer on a TE support layer, in order to enhance the integrity of the membrane and improve the microbiological safety of potable water reuse.
Article
Engineering, Chemical
Sanjana Yagnambhatt, Saber Khanmohammadi, Jonathan Maisonneuve
Summary: This study investigates the concept of using heat to enhance reverse osmosis (RO) desalination. The effect of temperature on water permeate flux, specific energy, permeate quality, and applied operating pressures is evaluated using an analytical model. The results suggest that under specific conditions, the tradeoff between savings in mechanical pump work and thermal energy input in thermally-enhanced RO can be favorable, leading to overall energy savings.
Article
Engineering, Chemical
Jiangju Si, Chenrui Xue, Shun Li, Linchao Yang, Weiwei Li, Jie Yang, Jihong Lan, Ningbo Sun
Summary: To meet the huge demand for lithium resources, there is an urgent need to develop a new efficient technology for lithium recovery from salt-lake brines. In this study, a selective membrane capacitive deionization system is reported, which achieves high lithium recovery capacity and rate through the use of materials with efficient intercalated pseudo-capacitance and a high specific area porous carbon. The use of a modified thin-coated membrane allows for selective Li+ recovery, and adjusting the concentrations of Li+ and Mg2+ in the feed solution enables higher Li+/Mg2+ selectivity.
Article
Engineering, Chemical
Mohamed R. Salem, R. Y. Sakr, Ghazy M. R. Assassa, Omar A. Aly
Summary: This research proposes a new method of using wasted thermal energies as an additional heating source for solar still distillation units (SSDUs) to increase productivity and reduce pollution and global warming. By testing two SSDUs, the study shows that heating airflow can raise temperatures, enhance freshwater production, and improve system thermal efficiency.
Article
Engineering, Chemical
Qimeng Sun, Miao Sun, Linyan Yang, Yuan Gao, Xinghai Zhou, Lihua Lyu, Chunyan Wei
Summary: This study presents an innovative design and fabrication of a fabric-based conical roll (FCR) evaporator, which enables low-temperature evaporation and achieves high evaporation efficiency with excellent thermal management ability. The evaporator has demonstrated advanced light-harvesting capability and can produce freshwater that meets drinking water standards, showing great potential for applications in desalination and sewage treatment.
Article
Engineering, Chemical
Yidong Zhang, Wangfang Deng, Meiyan Wu, Chao Liu, Guang Yu, Qiu Cui, Pedram Fatehi, Chunlin Xu, Bin Li
Summary: In this study, a novel polydopamine-functionalized lignin-containing pulp foam evaporator with high-efficiency desalination and multi-contaminant adsorption capabilities was designed. The foam evaporator showed excellent light absorption, water absorption, thermal conductivity, and chelation abilities, allowing for solar evaporation and contaminant adsorption synergistically. It also exhibited potential applications in metal ion concentration and contaminated seawater treatments, and demonstrated superior biodegradability compared to poly-styrene foam. This foam material holds promise for developing multifunctional photo-thermal systems for solar-driven water purification.
