Article
Engineering, Environmental
Tao Ou, Yuhua Wu, Weixing Han, Lingjun Kong, Gang Song, Diyun Chen, Minhua Su
Summary: Halloysite nanotubes (HNTs) are structurally promising adsorption materials, with their adsorption capacity for radioactive U(VI) significantly improved by synthesizing composite adsorbents (HNTs@PDA) with different polydopamine (PDA) layer thicknesses. The study investigates the effects of solution pH, temperature, and coexisting ions on the adsorption process, and provides insights into the adsorption mechanism of U(VI) by HNTs@PDA, contributing basic information for the application of HNTs for U(VI) removal.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Polymer Science
Wenxuan Wang, Feihan Yu, Zhichen Ba, Hongbo Qian, Shuai Zhao, Jie Liu, Wei Jiang, Jian Li, Daxin Liang
Summary: In this study, cellulose fibers with large porosity were prepared and sulfhydryl modification was applied for efficient adsorption of Cr(VI). The sulfhydryl-modified cellulose fibers demonstrated excellent adsorption capacity for chromium and other heavy metal ions, with the added benefits of low cost and environmental friendliness.
Article
Environmental Sciences
Zi-Le Chen, Yu-Nan Zhang, Jian-Zhong Guo, Lin Chen, Bing Li
Summary: In this study, polyethyleneimine-modified hydrochar (PEI-HC) was successfully synthesized and demonstrated to have high adsorption capacity for Cr(VI). The study also revealed the adsorption mechanism. This research provides a strategy for converting agricultural and forestry wastes into functionalized hydrochar and effectively removing Cr(VI).
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Inorganic & Nuclear
N. V. Pechishcheva, D. P. Ordinartsev, A. A. Valeeva, P. V. Zaitceva, A. D. Korobitsyna, A. A. Sushnikova, S. A. Petrova, K. Yu. Shunyaev, A. A. Rempel
Summary: Microcrystalline powders of rutile and anatase were milled to obtain nanosized TiO2 powders, which showed significant ability to remove chromium from aqueous solutions. The powders were effective in removing both Cr(VI) and total chromium under UV-irradiation and short wavelength visible light. The presence of acetate buffer promoted the most efficient chromium removal. This work provides a simple way to obtain a highly effective material for the removal of high toxic hexavalent chromium from industrial wastewater.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Engineering, Chemical
Dongmei Jia, Zhaojing Jing, Yongzheng Duan, Jing Li
Summary: Polyamine modified carbon nanotubes (PA-CNTs) were synthesized for the removal of hexavalent chromium (Cr(VI)) from aqueous solution. The PA-CNTs exhibited rapid adsorption rate and high adsorption capacity for Cr(VI), and maintained good adsorption performance in the presence of other substances (e.g., Rhodamine B).
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Review
Engineering, Environmental
Abul K. Mallik, Md. Abdul Moktadir, Md. Ashiqur Rahman, Md. Shahruzzaman, Mohammed Mizanur Rahman
Summary: The article introduces the hazards of Cr(VI) pollutants and removal methods, focusing on the progress and application of preparing adsorbents by surface-modifying silica, as well as the adsorption mechanisms of various adsorbents.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Yiran Sun, Fei Yu, Liqing Li, Jie Ma
Summary: The study introduces a flexible one-pot approach to synthesize amino-functional graphene sponge adsorbents for eliminating Hexavalent Chromium in aqueous environment, which showed outstanding adsorption capacity and reduction efficiency. The novel adsorbents have great potential in treating chromium containing wastewater.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Kai Nie, Ningning Ji, Jiahao Xu, Mingxiu Guo, Yaru Wang, Xiaolong Xu
Summary: Inspired by mussel adhesion protein, a new organic-inorganic hybrid material HNTs@PUS was successfully fabricated, which showed high mechanical stability and adsorption capacity for anionic and cationic dyes as well as heavy metal ions. It has great potential in the ultrafast and high-efficiency removal of pollutants from wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Polymer Science
Aijun Deng, Shaojie Wu, Junjie Hao, Hongbo Pan, Mingyang Li, Xiangpeng Gao
Summary: Heavy metal pollution, especially chromium contamination, is a significant problem in water treatment. Traditional methods for treating chromium-containing wastewater have limitations in terms of complexity and secondary pollution. Therefore, finding efficient and fast processing methods is crucial. In this study, a novel composite gel (T-BSA) was synthesized by modifying sodium alginate with thiourea and mixed with biochar. The T-BSA gel showed promising results in removing 99.98% of Cr(VI) from aqueous solutions through synergistic adsorption and photocatalytic reduction under UV light irradiation. The study also analyzed the mechanism behind the removal process and demonstrated that polysaccharide-derived materials can serve as efficient photocatalysts for wastewater treatment.
Article
Environmental Sciences
Thanasis Mpouras, Angeliki Polydera, Dimitris Dermatas, Nicola Verdone, Giorgio Vilardi
Summary: pH value is the most crucial factor influencing the adsorption efficiency of MWCNTs, with Cr(VI) adsorption being inversely proportional to pH value and significantly decreased above 7. MWCNTs exhibit high adsorption capacity and the adsorption process is fast, being almost completed within 1 hour. The experimental results were interpreted using different isotherm models.
Article
Chemistry, Physical
Juan Liao, Hao Wang, Nian Liu, Huaming Yang
Summary: This review discusses the functionalized modifications and personalized bioapplications of halloysite nanotubes (HNTs), highlighting their roles in antibacterial, anti-inflammatory, wound healing, cancer theranostics, bone regenerative, and biosensing applications.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2023)
Article
Environmental Sciences
Shuoqi Ren, Yuchen Wang, Zijian Han, Qiwei Zhang, Chongwei Cui
Summary: A highly efficient absorbent, PDA/MgAl-LDH, was developed in this study by modifying polydopamine film on Mg-Al layered double hydroxide to remove Cr(VI) from wastewater. The study systematically investigated the absorption performance and mechanisms, providing insights into the interaction between PDA and Cr(VI) as well as Cr(III) for potential wastewater treatment applications.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Physical
Hao Luo, Fenglian Fu, Bing Tang
Summary: In this study, a novel composite material FeS/DT was synthesized for the removal of hexavalent chromium from aqueous solution. The FeS/DT composite material exhibited excellent reduction and adsorption ability, reducing more than 99% of Cr(VI) to Cr(III) within 20 minutes and adsorbing Cr(III) onto the surface of diatomite. The maximum adsorption capacity of FeS/DT for Cr(VI) was found to be 141.6 mg/g. The FeS/DT composite material showed good adsorption and reduction effect at pH 3.0-9.0, and the experimental results were consistent with pseudo-second-order kinetic model and Langmuir isotherm adsorption model.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Wei-Min Yang, Fu Liu, Yan-Ting Jin, Zong-Mu Dong, Guang-Chao Zhao
Summary: Hexavalent chromium pollution is a global problem and reducing it to less toxic trivalent chromium is an effective method. This study used low-toxicity carbon quantum dots to reduce hexavalent chromium in wastewater and found different mechanisms at different pH values. By simulating real water samples, the method was successful in reducing the concentration of hexavalent chromium below the water quality standard.
Article
Materials Science, Multidisciplinary
Jinlong Zuo, Wenjing Li, Zhi Xia, Tingting Zhao, Chong Tan, Yuyang Wang, Junsheng Li, Luca Luca Vattuone
Summary: This study used corn straw to prepare biochar and modified it with acid, alkali, and metal salt. The results showed that the biochar modified with FeCl3 had the best adsorption performance for Cr(VI), significantly enhancing the adsorption capacity.
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.
