Article
Engineering, Environmental
Yating Luo, Jingli Pang, Cheng Peng, Jien Ye, Bibo Long, Jianhao Tong, Jiyan Shi
Summary: This study developed a synergistic system of P. oxalicum SL2-nZVI for Cr(VI) remediation, which effectively removed Cr(VI) mainly through extracellular nonenzymatic reduction. P. oxalicum SL2 exhibited iron precipitate solubilization and Fe(II) regeneration capabilities, and iron ions generated by nZVI also stimulated Cr(VI) reduction by organic acids secreted by P. oxalicum SL2. Overall, the P. oxalicum SL2-nZVI synergistic system shows promise for regenerating Fe(II) while reducing Cr(VI).
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Ozlem Oral, Aynur Yigit, Cetin Kantar
Summary: This study investigates the application sequence of pyrite and zero-valent iron (Fe0) on chromium (VI) removal. The results show that batch reactors achieve higher Cr(VI) removal efficiency compared to sequential batch reactors due to the differences in Fe redox cycling activities. Pyrite serves as a support material for Fe0, stimulating Fe redox cycling and enhancing Cr(VI) removal. In sequential batch reactors, Fe redox cycling activity is limited but can be increased with higher pyrite doses.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Metallurgy & Metallurgical Engineering
D. P. Ordinartsev, N. Pechishcheva, S. Kh Estemirova, A. Kim, K. Yu Shunyaev
Summary: In this study, a composite sorbent based on montmorillonite was synthesized, which exhibited enhanced adsorption efficiency for Cr(VI) ions. It has potential applications in wastewater treatment and the extraction of chromium compounds.
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
Environmental Sciences
Liming Ren, Baoning Zong, Rui Zhao, Yulin Sun, Fanbin Meng, Ruoyu Wang
Summary: In this study, the mechanism of Cr(VI) contaminated aquifer remediation using nZVI@rGO was explored through experiments and characterization analysis. The results showed that the large reactive conjugated structure of rGO enhanced the electron transfer efficiency between Cr(VI) and nZVI@rGO, while the uniform accommodation of Cr(III) precipitates on rGO effectively retarded the surface passivation of nZVI.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Environmental
Fengfeng Zhou, Qiangling Liu, Yaxin Qin, Wei Liu, Lizhi Zhang
Summary: In this study, L-cysteine was successfully modified on zero-valent iron (ZVI) through a mechanical ball-milling method, leading to improved surface functionality and enhanced removal efficiency of Cr(VI). The modified C-ZVIbm showed a significantly higher Cr(VI) removal efficiency of 99.6% compared to ZVIbm (7.3%) within 30 minutes. The surface characterization revealed the formation of a-COO-Fe complex through specific adsorption of Cys on the oxide shell. The adsorption process followed the Freundlich isotherm and pseudo-second-order kinetic model. Electrochemical and spectroscopic analysis demonstrated that Cys facilitated the Fe(III)/Fe(II) cycling on the surface of C-ZVIbm, resulting in the reduction of Cr(VI) to Cr(III).
JOURNAL OF HAZARDOUS MATERIALS
(2023)
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
Environmental Sciences
Yi Jin, Yaxuan Wang, Xi Li, Ting Luo, Yongsong Ma, Bing Wang, Hong Liang
Summary: This study synthesized the biochar and bentonite-supported nano zero-valent iron (BC-BE-nZVI) composite by the liquid-phase reduction method. The composite was then used to immobilize cadmium, chromium, and lead in simulated contaminated soil. The immobilization efficiencies of the metals were high and their mobility and bioavailabilities were significantly decreased. Stabilized metal species were formed and the soil metabolic function was enhanced.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Yifan Zhu, Weijie Shi, Hu Gao, Changyu Li, Wenxu Liang, Yongxin Nie, Cong Shen, Shiyun Ai
Summary: A novel, inexpensive and eco-friendly composite material (Fe@N-L-GM) consisting of aminated lignin, geopolymer, and Fe nanoparticles was synthesized and used for the simultaneous removal of Cr(VI) and NAP in wastewater. The material showed excellent adsorption capacity for Cr(VI) and high degradation efficiency for NAP. The adsorbed Cr(VI) was transformed into less toxic Cr(III) through reduction by electron donors, while ·OH radicals played a crucial role in mediating NAP degradation. The presence of NAP enhanced the removal rate of Cr(VI), with phenol as the main substance promoting Cr(VI) reduction. This work provides a new material and theoretical foundation for the simultaneous removal of heavy metals and persistent organic pollutants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Yinshun Dai, Liangfeng Duan, Yamin Dong, Wenjie Zhao, Shan Zhao
Summary: In this study, the effect of different iron and sulfur precursors on the sulfidation efficiency, physicochemical properties, and reactivity of microscale zero-valent iron (S-ZVI) was compared. It was found that S0@ZVI, synthesized from in situ S0, showed significantly higher removal of Cr(VI) compared to S0com/ZVI prepared using commercial S0. The direct formation of FeSx film played a crucial role in enhancing the removal of Cr(VI) by S0@ZVI. The insights gained from this study provide important information for the fabrication of highly reactive S-ZVI and the understanding of the mechanism of Cr(VI) removal.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Polymer Science
Yijun Duan, Fanbin Meng, Miao Li, Xiaoshu Hou, Shuo Zhang, Jiacheng Li, Xiang Liu
Summary: The study shows that using (mZVI+AC)/CA composite material can solve the passivation problem of microscale zero-valent iron and has a good removal effect on Cr(VI), with efficiency higher than pure mZVI, and a maximum removal capacity of 100.47 mg/g.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Engineering, Environmental
Weizhao Yin, Jiangtao Chen, Jinxin Zhao, Yanyan Gong, Jinhua Wu
Summary: In this study, unique layered Fe(III)-Cr(III) oxides were formed during the Cr(VI) removal by sulfate green rust (GRSO4). The layered structure of GRSO4 remained intact after fast reduction of Cr(VI). Further reduction of Fe(III) to Fe(II) using sodium dithionite resulted in stable Fe(II)/Fe(III) cycle in the hexagonal plates. The study observed better crystallinity at higher Fe(III) reduction rate and confirmed the layered metal oxide structure. Multiple treatment cycles showed increased Cr(III) loading on the layered Fe(III)-Cr(III) oxides. The study provides new evidence and insights for formulating strategies to eliminate Cr(VI) or related heavy metals.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Ruiming Zhang, Rossana Napolano, Beidou Xi, Anne Millicent Salazar, Qiantao Shi, Ying Zhao, Xiaoguang Meng
Summary: Recent studies have found that the combination of zero-valent iron (ZVI) and pyrite (FeS2) can effectively remove Cr(VI) from water. This study discovered that dissolved oxygen (DO) plays a crucial role in enhancing the removal efficiency. The presence of DO led to the oxidation of pyrite, producing protons that promote ZVI corrosion and creating dissolved sulfide, which improves the removal of Cr(VI) by forming ferrous sulfide precipitates on the ZVI surface.
Article
Environmental Sciences
He Sun, Yuduo Hua, Yongsheng Zhao
Summary: A cost-effective and environmentally friendly composite system for remediating Cr(VI)-polluted groundwater was developed in this study. The system utilized corncob extract as an electron donor and Fe(III) as a strengthening reagent to simultaneously reduce Cr(VI) and precipitate Cr(III). The technology provides a new strategy for in situ remediation of Cr(VI) pollution in groundwater, with the advantages of high efficiency, cost reduction, and pH regulation not being required.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Sihai Zhou, Liping Wang, Qiuya Zhang, Yu Cao, Yanan Zhang, Xudong Kang
Summary: The ball-milled zero-valent iron biochar composite prepared by the ball milling method has excellent dispersion and oxidation resistance. Factors such as the mass ratio of ZVI and BC, ball milling time, dosage, and initial pH were found to affect the removal performance of Cr(VI). Biochar as a carrier effectively disperses ZVI in solution, while weak magnetic field (WMF) increases the removal efficiency of Cr(VI). Overall, the combination of biochar, WMF, and ZVI shows potential in the removal of Cr(VI).
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Review
Chemistry, Analytical
Rajeev Jain, Ritu Singh
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2016)
Article
Chemistry, Analytical
Mohana Krishna Reddy Mudiam, Rajeev Jain, Ritu Singh
ANALYTICAL METHODS
(2014)
Article
Engineering, Environmental
Ritu Singh, Natesan Manickam, Mohana Krishna Reddy Mudiamc, Ramesh Chandra Murthy, Virendra Misra
JOURNAL OF HAZARDOUS MATERIALS
(2013)
Review
Biochemistry & Molecular Biology
Arif Jamal Siddiqui, Sadaf Jahan, Syed Amir Ashraf, Mousa Alreshidi, Mohammad Saquib Ashraf, Mitesh Patel, Mejdi Snoussi, Ritu Singh, Mohd Adnan
Summary: The global spread of the new coronavirus infection, identified as novel SARS-CoV-2 and causing COVID-19, has resulted in over 8,807,398 confirmed cases and 464,483 deaths as of June 21, 2020. Currently, there is no specific drug therapy available for COVID-19. Potential antimalarial and antiviral drugs are being tested worldwide, with some showing promising effects against the virus.
JOURNAL OF BIOMOLECULAR STRUCTURE & DYNAMICS
(2021)
Review
Plant Sciences
Arif Jamal Siddiqui, Corina Danciu, Syed Amir Ashraf, Afrasim Moin, Ritu Singh, Mousa Alreshidi, Mitesh Patel, Sadaf Jahan, Sanjeev Kumar, Mulfi I. M. Alkhinjar, Riadh Badraoui, Mejdi Snoussi, Mohd Adnan
Article
Chemistry, Multidisciplinary
Victor A. Chaplygin, Vishnu D. Rajput, Saglara S. Mandzhieva, Tatiana M. Minkina, Dina G. Nevidomskaya, Olga G. Nazarenko, Valery P. Kalinitchenko, Ritu Singh, Aleksey Yu Maksimov, Victoria A. Popova
Review
Environmental Sciences
Sanjeev Kumar, Ritu Singh, Nisha Kumari, Susmita Karmakar, Monalisha Behera, Arif Jamal Siddiqui, Vishnu D. Rajput, Tatiana Minkina, Kuldeep Bauddh, Narendra Kumar
Summary: COVID-19, caused by the novel coronavirus SARS-CoV-2, has become a global public health emergency. Studying the impact of environmental and biological factors on virus transmission and infection is crucial for further research and attention.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Syed Amir Ashraf, Arif Jamal Siddiqui, Abd Elmoneim O. Elkhalifa, Mohammed Idrees Khan, Mitesh Patel, Mousa Alreshidi, Afrasim Moin, Ritu Singh, Mejdi Snoussi, Mohd Adnan
Summary: The rapid increase in global population is driving the demand for food and agriculture products. Nanotechnology applications are emerging as a promising technology to transform traditional food and agriculture industries, improving food quality and safety. The development of nanotechnology is expected to bring about significant changes, providing comprehensive food solutions from farm to table.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Pharmacology & Pharmacy
Ritu Singh, Monalisha Behera, Nisha Kumari, Sanjeev Kumar, Vishnu D. Rajput, Tatiana M. Minkina, Mohd Adnan, Arif J. Siddiqui, Narendra Kumar
Summary: COVID-19, caused by SARS-CoV-2, has resulted in global human fatalities and has posed unprecedented challenges. Nanotechnology has played a crucial role in producing protective equipment and medicines against this pandemic. However, issues such as toxicity, clinical trials, and health risks remain debatable.
CURRENT PHARMACEUTICAL DESIGN
(2021)
Article
Environmental Sciences
Monalisha Behera, Nisha Kumari, Kaisar Raza, Ritu Singh
Summary: A novel magnetite nanochain adsorbent functionalized with glutathione was prepared through a wet reduction method and successfully used for the removal of dyes from aqueous solutions. The adsorbent showed excellent removal efficiency and reusability.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Review
Biotechnology & Applied Microbiology
Arif Jamal Siddiqui, Sadaf Jahan, Ritu Singh, Juhi Saxena, Syed Amir Ashraf, Andleeb Khan, Ranjay Kumar Choudhary, Santhanaraj Balakrishnan, Riadh Badraoui, Fevzi Bardakci, Mohd Adnan
Summary: Cancer is a major cause of death worldwide, and the discovery of new anticancer drugs is crucial. Natural products have been recognized as effective agents against various diseases, including cancer. Plants and microbes are potential sources of natural compounds to combat cancer, and research has advanced to a molecular level, leading to the development of potent anticancer drugs. Plants are abundant resources for the development of novel therapeutic agents to manage and prevent different types of cancer. The high toxicity, unfavorable side effects, and drug resistance of some chemotherapy drugs drive the demand for natural compounds as new anticancer drugs. This evidence-based review provides valuable information for scientists involved in the development of natural, safe, effective, and economical therapeutic agents against various cancers, making an important contribution to the field of drug discovery where combination therapy can enhance the efficacy of newly synthesized drugs.
BIOMED RESEARCH INTERNATIONAL
(2022)
Article
Food Science & Technology
Nisha Kumari, Monalisha Behera, Ritu Singh
Summary: In this study, chitosan-synthesized nanoscale zero-valent iron (nZVI) successfully removed two common xenobiotic dyes from freshwater and wastewater. Functionalization improved removal efficiency. The study also investigated the effects of factors such as adsorbent dose, pH, time, temperature, and initial dye concentration on dye removal and determined the optimal conditions. The results showed the method's potential for real water samples.
FOOD AND CHEMICAL TOXICOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Bharti Jain, Rajeev Jain, Prashant Kumar Jaiswal, Torki Zughaibi, Tanvi Sharma, Abuzar Kabir, Ritu Singh, Shweta Sharma
Summary: A green, fast, high-sample-throughput, non-instrumental, and affordable analytical method based on surfactant-assisted dispersive liquid-liquid microextraction (SA-DLLME) combined with thin-layer chromatography-digital image colourimetry (TLC-DIC) was proposed for determining favipiravir in biological and pharmaceutical samples. The method showed good linear range, low LOD and LOQ, and close agreement with HPLC-UV analysis results. The proposed methodology is green in nature and can be applied in resource-limited laboratories during the COVID-19 pandemic.
Article
Plant Sciences
Avimanu Sharma, Sanjeev Kumar, Ritu Singh
Summary: This study explores the synthesis of zinc oxide nanoparticles using Melia azedarach L. leaf extract and their combination with gum acacia to form a zinc-gum acacia nanocomposite. Pot experiment studies show that plants fertilized with the zinc-gum acacia nanocomposite exhibit significant improvement in growth, productivity, and uptake of essential nutrients compared to plants fertilized with commercial zinc fertilizer. Soil column studies demonstrate that the zinc-gum acacia nanocomposite reduces zinc leaching by 52%. These findings highlight the potential of the zinc-gum acacia nanocomposite as an eco-friendly and sustainable substitute for conventional zinc fertilizer, mitigating zinc losses and deficiency-related health problems.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Avimanu Sharma, Sanjeev Kumar, Ritu Singh
Summary: The study proposed a new formulation of coated nanourea for slow and sustainable nitrogen release. The synthesized nanourea showed reduced nitrate leaching and improved plant growth compared to commercial urea. The nanourea/chitosan nanocomposite exhibited potential as an alternative to commercial urea for sustainable agriculture.
ENVIRONMENTAL SCIENCE-NANO
(2022)
