Results 201 to 210 of about 9,676 (268)

Graphene oxide supported sulfidated nano zero-valent iron (S-nZVI@GO) for antimony removal: The role of active oxygen species and reaction mechanism.

Chemosphere, 2022
Sulfidated nano zero-valent iron (S-nZVI) was used to remove various pollutants from wastewater. However, the instability, poor dispersibility, and low electron transfer efficiency of S-nZVI limit its application.
Zi-Fang Chi, Shijie Ju, Xinyang Liu, Fei-Yang Sun, Yuhuan Zhu   +4 more
semanticscholar   +1 more source

Tailored design of three-dimensional rGOA-nZVI catalyst as an activator of persulfate for degradation of organophosphorus pesticides.

Journal of Hazardous Materials, 2022
In this study, three-dimensional reduced graphene oxide aerogel (rGOA)-supported nanozero-valent iron (rGOA-nZVI) was successfully synthesized via tailored design and applied to activate persulfate (PS) to degrade three organophosphorus pesticides (OPPs;
Ming-Yi Fan, Peng Zhang, Cui-Ping Wang, Jing-Chun Tang, Hongwen Sun   +4 more
semanticscholar   +1 more source

Drastically inhibited nZVI-Fenton oxidation of organic pollutants by cysteine: Multiple roles in the nZVI/O2/hv system

Journal of Colloid and Interface Science, 2021
The influence of l-cysteine, a common aliphatic amino acid, on the zero-valent iron (nZVI)/O2 photo-Fenten degradation of rhodamine B (RhB) was investigated in this study. The oxidation rate of RhB in the nZVI/O2/hv system was 91.2% after 40 min under the illumination and oxygen conditions and pH of 3, but when cysteine was introduced into the system ...
Chao, Xue, Yuanming, Peng, Anwei, Chen, Liang, Peng, Si, Luo   +4 more
openaire   +2 more sources

Synthesis of nZVI-Ni@BC composite as a stable catalyst to activate persulfate: Trichloroethylene degradation and insight mechanism

, 2021
In Fenton-like oxidation processes, the use of biochar (BC) as support material for the nanoscale zero valent iron-nickel (nZVI-Ni) bimetallic particles attained much attention to activate persulfate (PS) for TCE degradation in aqueous medium. In present
A. Shan, Ayesha Idrees, W. Zaman, Zain Abbas, Meesam Ali, Muhammad Saffi ur Rehman, S. Hussain, Muhammad Danish, Xiao-Gang Gu, Shuguang Lyu   +9 more
semanticscholar   +1 more source

Effects of phosphorus modified nZVI-biochar composite on emission of greenhouse gases and changes of microbial community in soil.

Environmental Pollution, 2021
The effect of modified biochar on the greenhouse gas emission in soil is not clear until now. In this study, biochar (BC) was modified by phosphoric acid (P) and further combined with nano-zero-valent iron (nZVI) to form nZVI-P-BC composite.
Zhihui Liu, Jing-Chun Tang, Xinwei Ren, S. Schaeffer   +3 more
semanticscholar   +1 more source

FeS2 assisted degradation of atrazine by bentonite-supported nZVI coupling with hydrogen peroxide process in water: Performance and mechanism.

Science of the Total Environment, 2021
In this study, bentonite-supported nZVI (B-nZVI) was used as a catalyst to activate H2O2 for atrazine (ATZ) degradation in the presence of FeS2. Results indicated that ATZ degradation by B-nZVI/H2O2 process was significantly enhanced when FeS2 was ...
Zeng-Hui Diao, W. Chu
semanticscholar   +1 more source

Sulfide-Modified NZVI (S-NZVI): Synthesis, Characterization, and Reactivity

2019
Sulfide-modified nanoscale zerovalent iron (S-NZVI) is attracting more and more attention due to its ease of production, improved reactivity with various pollutants (e.g., trichloroethene, diclofenac, cadmium, chromate), and most importantly, the selectivity to pollutants over water.
Yiming Su, Gregory V. Lowry, David Jassby, Yalei Zhang   +3 more
openaire   +1 more source

Field-scale investigation of nanoscale zero-valent iron (NZVI) injection parameters for enhanced delivery of NZVI particles to groundwater

Water Research, 2021
The effects of the injection parameters on delivery of nanoscale zero-valent iron (NZVI) to contaminated groundwater were investigated. The first two NZVI injections (gravity injection at low flow rates) resulted in NZVI being poorly mobile and gave total cumulative mass recoveries at the monitoring wells of 1.07%-2.43%. NZVI reached some wells (KDMW-3,
Jun-Young, Ahn, Cheolyong, Kim, Seong-Chun, Jun, Inseong, Hwang   +3 more
openaire   +2 more sources

Cr(VI) immobilization in soil using lignin hydrogel supported nZVI: Immobilization mechanisms and long-term simulation.

Chemosphere, 2022
A novel nanocomposite, named as nZVI@LH, was prepared by nanoscale zero-valent iron (nZVI) supported on lignin hydrogel and was used in the remediation of Cr(VI)-contaminated soil collected from an industrial site. Meanwhile, scanning electron microscopy
Xiao-Yan Liu, Shenyu Zhang, Xin-Ying Zhang, Haoli Guo, Z. Lou, Wei Zhang, Zhiqun Chen   +6 more
semanticscholar   +1 more source

NZVI Synthesis and Characterization

2019
This chapter provides an overview of NZVI types used to date for environmental restoration. The particle types are introduced systematically from bare NZVI to the manifold modifications leading to NZVI-containing composites or emulsions. Properties of these NZVI types which are important for the intended use as water treatment reagent and methods for ...
Katrin Mackenzie, Anett Georgi
openaire   +1 more source