Article
Environmental Sciences
Alessio Siciliano, Giulia Maria Curcio, Carlo Limonti
Summary: The study conducted experimental research on the removal of chromium using zero valent magnesium particles in a packed batch column, finding that the process performance was significantly influenced by pH values, and the temperature had a correlation with removal yields depending on pH values. The results provide insights into the potential applications of zero valent magnesium in water and wastewater purification.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Materials Science, Multidisciplinary
Mostafa Rahimi, Seied Mahdi Pourmortazavi, Hamed Zandavar, Somayeh Mirsadeghi
Summary: The study focused on utilizing bimetallic zero-valent magnesium: zinc composition as a reductant agent to remove hexavalent chromium from industrial wastewater. Response surface methodology and central composite design were employed for process optimization, leading to high efficiency removal of hexavalent chromium pollutant under optimal conditions.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Huijie Lu, Fang Zhu, Huishen Xu, Junxiang Liu, Yuanyuan Wu
Summary: In this study, green synthesis of nano-zero-valent iron and copper (GB-nZVI/Cu) using Ginkgo biloba extract as a reducing agent was reported. Characterizations of nanoparticles were analyzed by SEM, TEM, XRD, and XPS. GB-nZVI/Cu showed better Cr(VI) removal performance compared to apricot leaves synthesized nZVI/Cu (Al-nZVI/Cu) and hawthorn leaves synthesized nZVI/Cu (Hl-nZVI/Cu). GB-nZVI/Cu achieved 97.2% Cr(VI) removal in 30 minutes. Low pH and 313 K favored the reaction, while humic acid (HA) had an inhibitory effect. Coexisting anions promoted the reaction in the order of SO42- > HCO3- > Cl-. The rate constant K-2 increased from 0.0303 to 4.8865 g.mg-1.min(-1) as the concentration of SO42- increased. Na+ and low Mg2+ concentration promoted Cr(VI) removal, while NO3-, K+, Ca2+, and high Mg2+ concentration had negative effects. The removal reaction followed the pseudo-second-order kinetic model with chemical adsorption as the rate-controlling step. Visual MINTEQ models and mechanism studies showed that the removal of Cr(VI) by GB-nZVI/Cu was a combination of adsorption, reduction, and precipitation. The Fe-Cu galvanic cell accelerated the corrosion of Fe-0, enhancing the reduction of Cr(VI). Cu-0/Cu(I) could be oxidized into Cu(II) by receiving electrons from Fe3+, resulting in the generation of Fe2+. Cr(III) finally precipitated as FeXCr1 X(OH) (3) and Cr(OH)(3). GB-nZVI/Cu exhibited superior sedimentation behavior and more Fe2+ production to promote Cr(VI) reduction. GB-nZVI/Cu maintained better Cr(VI) removal performance than Al-nZVI/Cu and Hl-nZVI/Cu after five reuses.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Environmental Sciences
Miao Cai, Jian Zeng, Yaozong Chen, Peng He, Fang Chen, Xu Wang, Jinye Liang, Chunyao Gu, Dongli Huang, Ke Zhang, Min Gan, Jianyu Zhu
Summary: In this study, a novel biochar-supported zero-valent iron composite was synthesized and characterized for the removal of Cu(II) and Cr(VI). The composite showed better removal performance compared to single biochar and mineral, with a pH-dependent removal mechanism via heterogeneous multilayer chemisorption. Electrochemical analysis demonstrated higher electrical conductivity and electron transfer rate in the composite, indicating its potential for efficient heavy metal remediation.
Article
Environmental Sciences
Jian Zhang, Xianni Yang, Jun Shi, Mingyue Zhao, Weiqin Yin, Xiaozhi Wang, Shengsen Wang, Changai Zhang
Summary: The study demonstrated that ZVI supported by biochar derived from cellulose, hemicellulose, and their binary mixture showed better Cr(VI) removal capacity. The higher ordered and graphitic carbon structure was responsible for this improved performance, facilitating electron transfer and reduction of Cr(VI).
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Giulia Maria Curcio, Elvis Gribaldo Aucancela Rivera, Carlo Limonti, Tiziana Andreoli, Rajandrea Sethi, Alessio Siciliano
Summary: This study investigates the reduction of Cr6+ using zero-valent magnesium (ZVM) in a continuous flow system. The research explores the process kinetics under different operating conditions and examines the effects of inlet Cr6+ concentration, pH, and co-existing ions. The results show that ZVM powder exhibits the highest reactivity and can effectively remove Cr6+ even at higher pH levels.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Physical
Ge Gao, Lei Zhang, Yixin Shi, Shengjiong Yang, Gen Wang, Huining Xu, Dahu Ding, Rongzhi Chen, Pengkang Jin, Xiaochang C. Wang
Summary: The study found that the microscopic galvanic cell (mGC) exhibited higher Fe(II) release performance compared to ordinary nanoscale-ZVI (nZVI), resulting in improved Cr(VI) removal efficiency. Density functional theory (DFT) revealed that the close proximity of cathode and anode in mGC enhanced the galvanic corrosion of Fe(0). Additionally, hydroxyl radicals generated by a series of side-reactions slightly hindered the reduction of Cr(VI) in the system.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Environmental
Wenying Zhang, Linbo Qian, Lu Han, Lei Yang, Da Ouyang, Ying Long, Zifei Wei, Xinzhu Dong, Cong Liang, Jing Li, Mingyue Gu, Mengfang Chen
Summary: The study successfully demonstrated simultaneous removal of Cr(VI) and TCE from aqueous solutions using AT-nZVI/PS systems, with removal efficiencies reaching over 90% for both contaminants.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Wenxian Chen, Xiangwei Xu, Jinping Cui, Zhenyang Zhou, Yuyuan Yao
Summary: This study developed a novel bifunctional material that can efficiently degrade organic pollutants and eliminate hexavalent chromium. The material exhibited high apparent first-order constant and storage stability, enabling efficient degradation and removal of harmful substances at low temperatures.
Article
Environmental Sciences
Linbo Qian, Ying Long, Hangyu Li, Zifei Wei, Cong Liang, Renlan Liu, Mengfang Chen
Summary: In this study, the removal of hexavalent chromium (Cr(VI)) and Trichloroethylene (TCE) by rice straw pyrolysis biochar supported nanoscale zero-valent iron (nZVI) was investigated. The results showed that biochar supported nZVI effectively removed Cr(VI) and TCE in single pollutant system, but mutual inhibition occurred when both contaminants were present. Therefore, the mutual inhibition effect should be evaluated in the remediation of combined contaminated groundwater.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Chemical
Minhui Hou, Yu Zhang, Xin Jiao, Ning Ding, Yongli Jiao, Yuwei Pan, Jinkai Xue, Ying Zhang
Summary: Polyphenols were used to modify zero-valent iron (ZVI) and new catalysts were successfully synthesized. The modified ZVI showed improved removal efficiency of Cr(VI) due to enhanced electron transfer rate.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Wenying Zhang, Linbo Qian, Yun Chen, Da Ouyang, Lu Han, Xiao Shang, Jing Li, Mingyue Gu, Mengfang Chen
Summary: The attapulgite treated by HCl and HF showed increased silicon content and active silicon sites, leading to higher removal efficiency for Cr(VI). Silicon played a significant role in the reductive precipitation of Cr(VI) through Si-O-Fe coupling.
Article
Chemistry, Multidisciplinary
Xiangpeng Tan, Muhammad Shaaban, Jianwei Yang, Yajun Cai, Buyun Wang, Qi-An Peng
Summary: This study used ramie biochar (RBC) to activate nano zero-valent iron (nZVI) for enhanced removal of hexavalent chromium (Cr(VI)). The RBC-nZVI composite showed significantly higher efficiency in Cr(VI) removal compared to RBC or nZVI alone, due to a synergistic effect between RBC600 and nZVI on the reduction reaction of Cr(VI) and increased adsorption sites. This research provides a new approach for utilizing ramie waste and effectively addresses the limitations of nZVI for efficient and rapid Cr(VI) remediation.
Article
Chemistry, Multidisciplinary
Jianwei Yang, Xiangpeng Tan, Muhammad Shaaban, Yajun Cai, Buyun Wang, Qi'an Peng
Summary: BC-nZVI composites are effective in removing Cr(VI) from contaminated soil while increasing microbial diversity and abundance, with no significant adverse effects on soil quality or microorganisms.
Article
Energy & Fuels
Fatiha Benmahdi, Sami Khettaf, Mounira Kolli
Summary: In this study, synthesized activated carbon from silver berry seeds was used as a low-cost adsorbent for the removal of hexavalent chromium from aqueous solutions. Optimization of process parameters showed promising results in terms of chromium removal efficiency. The adsorption equilibrium data fit well with the Langmuir model, and the adsorption process followed a pseudo-second order kinetic model. The activated carbon derived from silver berry seeds has the potential to serve as an alternative to commercial activated carbons for industrial water treatment.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Chemistry, Multidisciplinary
Arun K. Singh, Kunwar P. Singh
RESEARCH ON CHEMICAL INTERMEDIATES
(2016)
Article
Chemistry, Multidisciplinary
Arun K. Singh, Jayant K. Singh
NEW JOURNAL OF CHEMISTRY
(2017)
Article
Nanoscience & Nanotechnology
Raghubeer S. Bangari, Arun K. Singh, Sadanandam Namsani, Jayant K. Singh, Niraj Sinha
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Materials Science, Paper & Wood
Arun K. Singh, Shruti Mishra, Jayant K. Singh
Article
Chemistry, Applied
Arun K. Singh, Jayant K. Singh
PROGRESS IN ORGANIC COATINGS
(2019)
Article
Engineering, Chemical
Shruti Mishra, Arun K. Singh, Jayant K. Singh
JOURNAL OF MEMBRANE SCIENCE
(2020)
Review
Chemistry, Applied
Moushumi Ghosh, Arun Kumar Singh
Summary: Ensuring the freshness and shelf-life of fruits is crucial for their proper utilization, and the development of edible nanocoatings with antimicrobial activities has shown great promise in extending the shelf-life while reducing fruit waste.
PROGRESS IN ORGANIC COATINGS
(2022)
Review
Chemistry, Applied
Arun K. Singh
Summary: Synthesis and design of bioinspired nanostructured coated surfaces with exceptional selective liquid repellency have gained significant attention due to their wide range of applications in various fields, particularly in controlling the transmission of contagious diseases such as COVID-19. This review focuses on the recent advancements and applications of PDMS-based nano-engineered superhydrophobic coatings, highlighting their effectiveness in separating oily contaminants from water and combating microbial and viral spread.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Green & Sustainable Science & Technology
Arun K. Singh
Summary: This article discusses the development of antiviral coated surfaces based on engineered nanomaterials such as silver, titanium oxide, copper sulfide, and copper oxide, to prevent the transmission of the SARS-CoV-2 virus. The review focuses on the fabrication of metallic nanoparticles based coatings on various substrates and their antiviral efficacy, along with the underlying mechanisms. The findings provide valuable insights for future research in designing more advanced antiviral materials and coated surfaces to control future epidemics.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
Review
Biochemistry & Molecular Biology
Natasha Kaushal, Arun K. Singh
Summary: Natural bio-material surface with hydrophobic behavior has inspired the design of sustainable artificial coatings with hydrophobic or superhydrophobic behavior. These coatings have various applications in water remediation, oil/water separation, self-cleaning, anti-fouling, anti-corrosion, as well as in medical fields. Bio-based materials derived from plants and animals are used to develop fluorine free hydrophobic coatings with longer durability. This review summarizes recent developments in coating fabrication methods, properties, and applications using different bio-based materials. The mechanisms behind the coating fabrication process and their durability under different environmental conditions are also discussed. Prospects and limitations of bio-based coatings in practical applications are highlighted.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Environmental
Arun K. Singh, Abhishek Kumar Chaubey, Inderpreet Kaur
Summary: This review summarizes the importance of composites based on layered double hydroxides and waste resources derived biochar (LDHs-biochar) for the removal of antibiotics from aqueous media. The excellent adsorption performance and catalytic degradation ability of LDHs-biochar are the main reasons for its application. The review also discusses the basic concept and strategies for the preparation of LDHs-biochar, as well as the mechanisms and environmental conditions involved in the removal of antibiotics. Furthermore, it emphasizes the emerging approaches based on LDHs-biochar and the major hurdles and challenges associated with the process. This review is of significant importance for new research findings and the development of LDHs-biochar based systems for large-scale water remediation application.
JOURNAL OF HAZARDOUS MATERIALS ADVANCES
(2023)
Review
Green & Sustainable Science & Technology
Arun K. Singh
Summary: The separation of both emulsified and immiscible oil/water mixtures using materials with special wetting behavior has attracted research attention. Waste material-mediated surfaces have gained interest due to their advantages such as fluorine-free nature, specific surface structural properties, vast availability, flexibility in modification, and eco-friendly nature. This review discusses the application of waste materials-based special wettable surfaces in oil/water separation, including the preparation method, treatment effect, efficiency, and separation mechanism. Additionally, unresolved issues and potential challenges for future development are highlighted.
Article
Water Resources
Arun K. Singh, Kunwar P. Singh
APPLIED WATER SCIENCE
(2018)
Article
Engineering, Environmental
Arun K. Singh, Kumar Ketan, Jayant K. Singh
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2017)
Article
Chemistry, Physical
Arun K. Singh, Jayant K. Singh
APPLIED SURFACE SCIENCE
(2017)
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.