Article
Environmental Sciences
Kai He, Shuchen Wang, Yu Liu, Zhenyu Cao, Liwei Yang, Feng He
Summary: This study demonstrates that lignosulfonate modified zero valent iron (LS-ZVI) can significantly enhance the removal of Cr(VI). LS-ZVI has a larger specific surface area and higher surface Fe(0) content compared to conventional ZVI, resulting in efficient Cr(VI) removal. Additionally, LS-ZVI also exhibits excellent removal performance for Ni(II), Zn(II), and Cd(II).
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Feiyang Sun, Yuhuan Zhu, Xinyang Liu, Zifang Chi
Summary: In this study, nanoscale zero-valent iron supported by reduced graphene oxide (nZVI/rGO) was synthesized for the removal of Se(IV) from wastewater. The effects of different environmental conditions on the removal efficiency were investigated, and the reaction mechanism was further analyzed through characterization techniques.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Chemical
Ying Zhao, Qingxu Li, Qiantao Shi, Beidou Xi, Xinyi Zhang, Zhiqiang Jian, Gaoting Zhou, Xiaoguang Meng, Xuhui Mao, Dejun Kang, Bin Gong
Summary: Extensive studies have been conducted on phosphate removal by micron-scale zero-valent iron (mZVI). The mechanisms of phosphate removal were elucidated using ATR-FTIR, XRD, and XANES techniques, revealing that precipitation is the main pathway for phosphate removal by ZVI under aerobic conditions. This study significantly improves our understanding of the fundamental processes involved in phosphate removal by ZVI.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Liu Fei, Shiying Ren, Ma Xijun, Nisar Ali, Zhang Jing, Jing Yi, Muhammad Bilal
Summary: This study investigates the use of zero-valent iron activated peroxidized sulphate (ZVI/PDS) synergistic action for the effective removal of EDTA-chelated copper. The results show that the ZVI/PDS process significantly improves the removal efficiency of complexed copper and total organic carbon compared to ZVI alone. Factors such as the molar ratio, initial pH, ZVI dosage, and PDS dosage influence the removal efficiency of complexed copper. Analysis indicates that the method can reduce chelated copper and immobilize it on the ZVI surface.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Shambhu Kandel, Yelena P. Katsenovich, Daria Boglaienko, Hilary P. Emerson, Tatiana G. Levitskaia
Summary: The removal of TcO4 by Fe-0 under oxidative conditions is affected by the initial pH, with the fastest removal rate observed at pH(i) 7 and the slowest at pH(i) 10.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Dejin Zhang, Shuyue Wu, Bo Zhou, Yan Dong, Yidan Wei, Jianru Liang, Lixiang Zhou
Summary: This study comprehensively investigates the performance of sulfidated nanoscale zero-valent iron (S-nZVI) in removing inorganic arsenic (As) under oxic conditions. The study reveals that sulfidation enhances the removal efficiency of As(III) by increasing reaction rates and adsorption capacity. The study also identifies key factors that influence the removal process, including initial As(III) concentrations, pH values, and co-existing anions concentrations. Additionally, the study highlights the excellent potential of S-nZVI in effectively removing As(III) under oxic conditions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Yuhang Zhang, Donglei Li, Liang She, Furong Guo, Falong Jia, Lizhi Zhang, Zhihui Ai, Xiao Liu
Summary: This study developed a sample called FA-ZVIbm by ball-milling zero-valent iron (ZVI) with formic acid (FA), which showed remarkable performance in removing heavy metal complexes, specifically Cu(II)-ethylenediaminetetraacetic acid (Cu(II)-EDTA). The addition of FA greatly enhanced the removal efficiency, increasing the removal rate constant by 80 times. The improvement was attributed to the formation of a ferrous formate (Fe (HCOO)2) shell on the surface of FA-ZVIbm, which facilitated the activation of reactive oxygen species (ROS) and the leaching of Fe3+.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Review
Green & Sustainable Science & Technology
Giulia Maria Curcio, Carlo Limonti, Alessio Siciliano, Isik Kabdasli
Summary: This review analyzes the latest research on the use of zero-valent materials for chemical denitrification, with a focus on the microscopic and nanoscopic forms of zero-valent iron. The effects of initial pH, dissolved oxygen, initial nitrate concentration, temperature, and dissolved ions on the nitrate removal process were evaluated. In addition, the characteristics of alternative zero-valent metals as support materials were compared.
Article
Environmental Sciences
Weiquan Li, Xueying Lin, Sihao Lv, Weizhao Yin, Zhanqiang Fang, Jingling Huang, Ping Li, Jinhua Wu
Summary: This study investigated the effect of hydrogenotrophic denitrification on cadmium (Cd(II)) removal and column life-span using hydrogen-autotrophic microorganisms and zero-valent iron (Fe-0) filled columns. The results showed that the nitrate-mediated bio-Fe-0 column had a higher Cd(II) removal efficiency and longer service life compared to the bio-Fe-0 and Fe-0 columns. This improvement was attributed to hydrogenotrophic denitrification, which caused more iron corrosion and more secondary mineral generation, providing more reaction sites for Cd(II) adsorption and immobilization. The distribution of reactive zone along the bio-Fe-0 column mediated by nitrate was found to be uneven, with the latter half part identified as a more active region for Cd(II) immobilization.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Yi Wang, Lihu Liu, Xiong Yang, Steven L. Suib, Guohong Qiu
Summary: In this study, zero-valent iron was electrochemically oxidized to magnetic iron oxides, which showed high efficiency in removing As(V) from mining wastewaters. The results from simulated and actual wastewater experiments demonstrated that magnetic iron oxides, mainly magnetite and maghemite, had good adsorption capacity for As(V) and could achieve solid-liquid separation under a magnetic field. The removal ratio of As(V) was influenced by the potential and initial pH, and the presence of Cl- significantly enhanced the removal effect.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Yang Ruan, Huimin Zhang, Zijing Yu, Zenghui Diao, Gang Song, Minhua Su, Li'an Hou, Diyun Chen, Shuao Wang, Lingjun Kong
Summary: The immobilization of uranium from wastewater by zero valent iron was studied in this work. A biochar supported nano zero valent iron was obtained and the uranium immobilization efficiency was enhanced to 99.9% in the presence of phosphate. The sequence of uranium, Fe/BC(900) and phosphate influenced the uranium immobilization efficiency.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Mingyang Song, Xiaolei Hu, Tianhang Gu, Wei-xian Zhang, Zilong Deng
Summary: In this study, a nanocellulose-based composite, NC-nZVI, was developed for efficient removal of nickel. The nZVI was anchored to nanocellulose through a liquid-phase reduction method, resulting in varied morphology and dispersion status. Among the developed composites, CNC-nZVI showed the most evenly distributed nZVI particles. The binding between NC and nZVI was achieved through hydrogen bonds, electrostatic attractions, coordination-covalent bonds, and steric hindrance. The CNC-nZVI composite exhibited significantly higher removal efficiency of Ni2+ compared to bare nZVI, and remained effective under a wide pH range and in the presence of interference ions like NO3-, Cl-, and Ca2+. The observed hollow-out structure and Tafel extrapolation curves indicated that CNC activated diffusion path and accelerated electronic transfer from nZVI. The superior removal performance of NC-nZVI and the abundance of raw materials make it a promising material for environmental remediation and wastewater treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Ling Xu, Ji Li, Wenbin Zeng, Kai Liu, Yibing Ma, Liping Fang, Chenlu Shi
Summary: Soil contaminated with organic compounds poses a significant threat to plant growth and food safety. In this study, we synthesized zero-valent bimetallic Fe/Cu catalysts and used them in conjunction with persulfate (PS) and organic surfactants to degrade 2,4-dichlorophenol (DCP) in soil, while exploring the main environmental impact factors. Experimental results showed that a 5% (mass) dosage of Fe/Cu exhibited a higher DCP degradation efficiency (86%) in soil, and the degradation efficiency increased with increasing initial PS concentration. Acidic conditions favored DCP degradation in soil. Furthermore, the addition of Tween-80 and Triton-100 enhanced the desorption of DCP from the soil surface, thereby increasing the degradation efficiency of DCP by the Fe/Cu and PS reaction system. Quenching experiments revealed that SO??? 4. and .OH were the predominant radicals for DCP degradation in the Fe/Cu and PS reaction system, with non-radical species also present.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Yue Hu, Kexin Ke, Hongwei Sun, Zuying Wang, Xuting Zhang, Wenjuan Shen, Shaping Huang, Wenguan Lu, Xiaobing Wang
Summary: This study focuses on surface modification of zero-valent iron using waste coffee grounds (CG) to enhance its reactivity. The modified CG-ZVI showed significantly faster removal of Cr(VI) and selective removal in the presence of other anions. Moreover, the CG-ZVI also acted as a reactive barrier material for in situ treatment of heavy metal-contaminated water. This research demonstrates the importance of CG modification in improving the reactivity of ZVI and presents a new utilization for discarded CG.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Ahmed Hamdy
Summary: Nanoscale zero-valent iron was prepared and used for Cu(II) removal in this study. XRD and SEM analysis confirmed the characteristics and morphology of nZVI particles, demonstrating successful Cu(II) adsorption and proposing removal mechanisms onto nZVI particles.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Environmental
Yusuke Baba, Tomonori Yatagai, Takuma Harada, Yoshinori Kawase
CHEMICAL ENGINEERING JOURNAL
(2015)
Article
Environmental Sciences
Yusuke Nakatsuji, Zeinab Salehi, Yoshinori Kawase
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2015)
Article
Engineering, Environmental
Takuma Harada, Tomonori Yatagai, Yoshinori Kawase
CHEMICAL ENGINEERING JOURNAL
(2016)
Article
Environmental Sciences
Nanae Fujioka, Moe Suzuki, Shunji Kurosu, Yoshinori Kawase
Article
Environmental Sciences
Mayuka Tomizawa, Shunji Kurosu, Maki Kobayashi, Yoshinori Kawase
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2016)
Article
Environmental Sciences
Shigeki Sakamoto, Yoshinori Kawase
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
(2016)
Article
Environmental Sciences
Akari Takayanagi, Maki Kobayashi, Yoshinori Kawase
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2017)
Article
Environmental Sciences
Maki Kobayashi, Shunji Kurosu, Rina Yamaguchi, Yoshinori Kawase
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2017)
Article
Engineering, Environmental
Rina Yamaguchi, Shunji Kurosu, Moe Suzuki, Yoshinori Kawase
CHEMICAL ENGINEERING JOURNAL
(2018)
Article
Chemistry, Applied
Misaki Hisada, Yoshinori Kawase
JOURNAL OF RARE EARTHS
(2018)
Article
Environmental Sciences
Hirotaka Satori, Yoshinori Kawase
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2014)
Article
Engineering, Chemical
Shiori Nagoya, Shiori Nakamichi, Yoshinori Kawase
SEPARATION AND PURIFICATION TECHNOLOGY
(2019)
Article
Environmental Sciences
Naoki Ohta, Maki Kobayashi, Yoshinori Kawase
Summary: The mechanisms of carbamazepine (CBZ) removal using zero-valent iron (ZVI) were studied in this research. The results showed that adsorption was the dominant mechanism at lower pH, while degradation by oxidative and reductive reactions played a major role at higher pH. A novel kinetic model was developed to analyze the removal of CBZ by ZVI, which showed reasonable agreement with experimental data.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Misaki Hisada, Yuriko Tomizawa, Yoshinori Kawase
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2019)