title: Effective removal of nemacide fosthiazate from an aqueous solution using zero-valent iron.
abstract: In this study, the removal of fosthiazate in an aqueous solution using zero valent iron (ZVI) and the related removal reaction mechanism were investigated. The results indicate that the dissipation of fosthiazate adheres to a pseudo-first order reaction law. The apparent rate constant of fosthiazate removal could be improved by increasing the ZVI dosage, control temperature and initial pH. The observed pseudo-first-order degradation rate constants (Kobs) of fosthiazate removal using ZVI were varied in the different electrolyte solutions, and were determined as follows: Kobs (MgSO4) < Kobs (KCl) < Kobs (Control) <Kobs (NaCl) < Kobs (CaCl2) < Kobs (NaNO3) < Kobs (Na2SO4). In addition, the effects of Fe(2+) and Fe(3+) ions on the fosthiazate removal were also investigated, and the fosthiazate removal efficiencies were measured as 1.3% and 5.7% with Fe(2+) and Fe(3+), respectively. The characterizations of ZVI before/after the reaction were employed to gain insight into the reaction mechanism. Finally, the main degradation products were investigated by means of an Agilent 1100 LC/MSD Ion Trap.
authors.affiliation: College of Science, China Agricultural University, Beijing 100193, China. Electronic address: wuxue0728@126.com.
authors.forename: Junxue
authors.initials: J
authors.lastname: Wu
authors.affiliation: Department of Soil and Water Sciences, China Agricultural University, Beijing 100193, China. Electronic address: chongyang.shen@cau.edu.cn.
authors.forename: Chongyang
authors.initials: C
authors.lastname: Shen
authors.affiliation: College of Science, China Agricultural University, Beijing 100193, China. Electronic address: hongyan@cau.edu.cn.
authors.forename: Hongyan
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Department of Soil and Water Sciences, China Agricultural University, Beijing 100193, China. Electronic address: 493783405@qq.com.
authors.forename: Weilan
authors.initials: W
authors.lastname: Lu
authors.affiliation: College of Science, China Agricultural University, Beijing 100193, China. Electronic address: 0910010205@cau.edu.cn.
authors.forename: Yun
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: College of Science, China Agricultural University, Beijing 100193, China. Electronic address: wangchengju@cau.edu.cn.
authors.forename: Chengju
authors.initials: C
authors.lastname: Wang
mesh_terms: D000969:Antinematodal Agents / Q000737:chemistry / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D008278:Magnesium Sulfate / Q000737:chemistry; D009943:Organophosphorus Compounds / Q000737:chemistry / Q000302:isolation & purification*; D012965:Sodium Chloride / Q000737:chemistry; D012996:Solutions / Q000737:chemistry; D053778:Thiazolidines / Q000737:chemistry / Q000302:isolation & purification*; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification
chemical_list: D000969:Antinematodal Agents; D009943:Organophosphorus Compounds; D012996:Solutions; D053778:Thiazolidines; D014874:Water Pollutants, Chemical; D014867:Water; D012965:Sodium Chloride; D008278:Magnesium Sulfate; C493102:fosthiazate; D007501:Iron
keywords: Aqueous solution; Fosthiazate; Removal reaction mechanism; Zero-valent iron