Removal of Cr(VI) from Aqueous Solution by Nanoscale Zero-Valent Iron

被引：3
|
作者：
Yin, Yanan [1 ]
Wang, Jianlong [1 ,2 ]
机构：
[1] Tsinghua Univ, INET, Collaborat Innovat Ctr Adv Nucl Energy Technol, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Beijing Key Lab Radioact Waste Treatment, Beijing 100084, Peoples R China
来源：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2017年 / 17卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Chromium; Heavy Metal; Nanoscale Iron; Kinetic; Thermodynamics; METHYLENE-BLUE ADSORPTION; REDUCTIVE DECHLORINATION; CHROMATE REDUCTION; P-CHLOROPHENOL; HEXAVALENT CHROMIUM; HEAVY-METALS; FE-0; BIOSORPTION; REMEDIATION; GROUNDWATER;
D O I：
10.1166/jnn.2017.13831
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The removal of Cr(VI) from aqueous solution using nanoscale iron particles was investigated. The effect of pH and temperature on Cr(VI) reduction was determined. The results showed that the removal efficiency of Cr(VI) increased with increase of the initial concentration of Cr(VI) from 1 to 10 mg/L. The removal process of Cr(VI) by nano-iron particles followed the first-order reaction kinetics and the rate constant was in the range of 0.164-0.184 min(-1). The thermodynamic parameters, such as entropy (Delta S), free energy (Delta G) and enthalpy (Delta H) of Cr(VI) reduction by nano-iron particles were calculated. The reduction of Cr(VI) by nanoscale iron particles was spontaneous process.
引用
收藏
页码：5864 / 5868
页数：5
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