Article
Engineering, Environmental
Zhen Wang, Yangyi Yu, Qin Guo, Chaoting Guan, Jin Jiang
Summary: This study investigates the relative role of different reactive intermediates in microscale and nanoscale zerovalent iron (ZVI) activated peroxydisulfate (PDS) processes. The results show that the relative role of Fe(IV) in PDS transformation varies in different stages, and the fast dissolution of nanoscale ZVI leads to a relatively lower relative role of Fe(IV) in PDS transformation.
Article
Chemistry, Multidisciplinary
Jie Hou, Chao Hu, Jason C. White, Kun Yang, Lizhong Zhu, Daohui Lin
Summary: By using nZVI and nematodes to remediate organochlorine-contaminated soil, a synergistic degradation of 80% pentachlorophenol was achieved within 3 days. The exposure to nZVI stimulated the synthesis of reductive biomolecules which acted as a barrier and mitigated the toxicity of the contaminant. The optimized soil remediation approach, consisting of nZVI, nematodes, and L-cysteine, demonstrated a 2.1-fold increase in removal efficiency with only 48.5% nZVI consumption compared to treatment with nZVI alone.
Article
Engineering, Environmental
Payel Singh, Prabir Pal, Priyanka Mondal, Govindachetty Saravanan, Penumaka Nagababu, Swachchha Majumdar, Nitin Labhsetwar, Subhamoy Bhowmick
Summary: Sulphur modified nano zerovalent iron (S?nZVI) has shown high efficiency in removing inorganic arsenic from water, especially under acidic conditions. The addition of FeS on the surface of nZVI can significantly alter the sequestration mechanism of arsenic, leading to enhanced removal efficiency in contaminated water.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Zenglu Qi, Ruiping Liu, Tista Prasai Joshi, Jianfeng Peng, Jiuhui Qu
Summary: The electrolysis-assisted nano zerovalent iron (E-nZVI) system demonstrated a high removal efficiency of Se(IV), exceeding the non-assisted nZVI system by 135%. Higher voltages did not significantly increase the reaction rate constant, indicating a complex relationship between parameters in the system.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Kai Yu, Yanni Lv, Haowen Jiang, Huimin Li, Penghui Shao, Liming Yang, Hui Shi, Zhong Ren, Cun Liu, Xubiao Luo
Summary: By spectroscopic characterization and molecular dynamics simulation, this study reveals the mechanisms of solution chemistry effects on the dehalogenation ability of CSZVI in water-tetrahydrofuran solution. It was found that bulk cations influenced the interlayer distance, water content, and acidity of CSZVI, thus affecting its degradation efficiency. Mg2+ at a concentration of 20 mM induced optimal nano-confined interlayers and exhibited a debromination efficiency 9.84 times larger than common nano-sized ZVI. On the other hand, K+ rendered the interlayers less reactive but protected CSZVI from corrosion loss with higher electron utilization efficiency, 1.7 times higher than in the presence of Mg2+. These findings provide new strategies for effective wastewater and contaminated soil remediation.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Yu Zeng, Tai Li, Yingzhi Ding, Guodong Fang, Xiaolei Wang, Bo Ye, Liqiang Ge, Juan Gao, Yujun Wang, Dongmei Zhou
Summary: This research developed a convenient method for mass production of nZVI/BC and successfully applied it to the remediation of organic polluted soil on an in-situ pilot scale. The application of nZVI/BC-PS significantly increased the degradation rates of contaminants and inhibited soil enzyme activities, but the inhibitory effects disappeared with prolonged remediation time.
Article
Chemistry, Multidisciplinary
Jien Ye, Yating Luo, Jiacong Sun, Jiyan Shi
Summary: The study found that bentonite-modified nZVI showed improved efficiency in removing Cr(VI) and enhanced transport performance compared to nZVI. The transport of both materials was negatively correlated with the clay composition in different soils. Besides, modification of nZVI by bentonite reduced toxicity to luminous bacteria and ryegrass, indicating potential for in situ environmental remediation.
Article
Chemistry, Physical
Peng Fan, Xuanjun Zhang, Huanhuan Deng, Xiaohong Guan
Summary: This study successfully enhanced the removal rate, capacity, and selectivity of p-NP by utilizing C-dots@ZVI, which mainly attributed to the promoted hydrophobicity of ZVI surface, facilitated electron transfer, and accelerated corrosion.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Environmental Sciences
Feilong Gao, Shakeel Ahmad, Jingchun Tang, Chengfang Zhang, Song Li, Chen Yu, Qinglong Liu, Hongwen Sun
Summary: This study successfully synthesized biochar-supported sulfidated nano zerovalent iron (S-nZVI@BC) and demonstrated its effectiveness in the reductive degradation of soil-sorbed contaminants. The as-synthesized composite showed superior nitrobenzene (NB) removal and aniline (AN) formation efficiencies compared to S-nZVI alone. Furthermore, the addition of biochar enhanced the solubilization of NB from soil. Overall, this research highlights the potential of S-nZVI@BC in enhancing the in-situ remediation of NB-contaminated soil.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Polymer Science
Oanamari Daniela Orbulet, Annette Madelene Dancila, Simona Caprarescu, Cristina Modrogan, Violeta Purcar
Summary: The main objectives of this study were to immobilize nano zerovalent iron (nZVI) onto a polymeric material (Purolite A400) and synthesize the polymeric material (A400-nZVI) using sodium borohydride (NaBH4) reduction. The obtained A400-nZVI was used to remove nitrate ions from simulated groundwater. The polymeric materials, with and without nZVI (A400 and A400-nZVI), were characterized using FTIR, SEM-EDAX, XRD, and TGA analysis. The results confirmed the presence of nZVI on the polymeric material (A400). The adsorption capacity of A400-nZVI as a polymeric adsorbent was evaluated through kinetic and thermodynamic studies. The experimental results showed that nitrate ions reduction followed the pseudo-second-order kinetic model and Freundlich isotherm. A potential reaction mechanism was suggested based on the kinetic model results. A higher nitrate removal (>80%) was achieved under acidic conditions. The results indicate that the obtained A400-nZVI can be considered as a potential polymeric adsorbent for various pollutants in groundwater and wastewater.
Article
Engineering, Environmental
Yue Zhang, Zhongkai Duan, Yuhao Jin, Haixiang Han, Chunhua Xu
Summary: The effective sulfidation of ZVI relies on the chemical bridging of FeSx and ZVI, which is achieved through the in situ formation of FeSx on the ZVI surface. This leads to the bonding between the pristine ZVI and the newly formed FeSx phase, resulting in superior electron transportation activity compared to physically coated SZVI. The study elucidates the mechanism of surface generation of FeSx on ZVI and provides new perspectives for the design of high-quality SZVI for environmental applications.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Yalan Liu, Hui Zhang, Yang Ding, Nan Hu, Dexin Ding
Summary: This article investigates the use of carboxy methyl cellulose (CMC) to stabilize nano zero-valent iron (nZVI) and tests its dispersal and antioxidizing properties. The results show that CMC-nZVI has excellent dispersal and resistance to oxidation compared to nZVI. Further experiments demonstrate that CMC-nZVI has great potential for the removal of U(vi) under acid conditions.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Weiyu Liang, Yihao Shen, Chen Xu, Dongqing Cai, Dongfang Wang, Kailun Luo, Xuechun Shao, Zhihua Qiao, Wei Zhang, Cheng Peng
Summary: A novel composite material was prepared for the removal of Cr and Cd from water and soil. The results showed that the composite material had high adsorption capacity and stability, and could simultaneously remove Cr and Cd. Cations promoted the adsorption, while anions and humic acid inhibited the adsorption.
ENVIRONMENTAL SCIENCE-NANO
(2022)
Article
Chemistry, Multidisciplinary
Ting Song, Geng Yang, Hanxi Zhang, Mengyue Li, Wanyi Zhou, Chuan Zheng, Fengming You, Chunhui Wu, Yiyao Liu, Hong Yang
Summary: This study constructed a GSH-depleting magnetic nanoplatform (D@MOs-P) that enhances ferroptosis by disrupting redox homeostasis and ferritinophagy-mediated iron disorders. The D@MOs-P platform utilizes disulfide bond-mediated glutathione depletion and magnetic hyperthermia to disrupt redox homeostasis and induce ferritinophagy, leading to intense ferroptosis of tumor cells. In vitro and in vivo results demonstrate that D@MOs-P effectively suppresses tumor growth with minimal side effects. This research also highlights the potential of magnetic nanoparticles for T2-weighted MR imaging.
Article
Engineering, Environmental
Guan-Nan Zhou, Jia-Qi Chen, Wen-Qiang Li, Chuan-Shu He, Li Gong, Xiao-Cheng Liu, Yi-Ran Wang, Dahong Huang, Yang Mu
Summary: S-nZVI enhances the degradation of contaminants by adsorbing and stabilizing reactive surface hydrogen species (H*ads). The presence of sulfur plays a role in regulating the catalytic performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
