Ni/Fe双金属对PCE脱氯影响因素研究

何小娟; 汤鸣皋; 沈照理; 崔卫华; 徐鹏

Ni/Fe双金属对PCE脱氯影响因素研究

中国地质大学水资源与环境学院, 北京 100083

基金项目:

国家自然科学基金项目 40072080

国家自然科学基金项目 40142009

详细信息

作者简介:
何小娟(1976-), 女, 中国地质大学(北京)水资源与环境学院博士研究生, 从事地下水有机污染恢复与治理研究.E-mail: hxj5000@sohu.com

中图分类号: X505
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出版历程
- 收稿日期: 2003-01-10
- 刊出日期: 2003-05-25

Effects of Bimetal Ni/Fe on Dechlorination of PCE

Faculty of Water Resources and Environment, China University of Geosciences, Beijing 100083, China

摘要

摘要: 以四氯乙烯(PCE)为目标污染物, 利用批试验研究Ni/Fe双金属对氯代烃脱氯的影响因素.结果表明: (1)当参加反应的Ni/Fe双金属分别为10 g和20 g时, 反应速率常数k_obs分别为0.047 7 h^-1和0.097 0 h^-1, 说明增加参加反应的Ni/Fe双金属的质量可提高脱氯速率; (2)当粒度分别为20~ 40目、40~ 65目和80~ 100目时, k_obs分别为0.047 7 h^-1, 0.059‥ 8 h^-1和0.088 6 h^-1, 说明选用Ni/Fe双金属颗粒越小脱氯速率越快; (3)当Ni/Fe质量比分别为0.024%, 0.048%和0.072%时, 所得k_obs分别为0.047 7 h^-1, 0.066 2 h^-1和0.073 4 h^-1, 说明Ni/Fe双金属系统中Ni/Fe质量比越高脱氯效果越好, 但最优Ni/Fe质量比还有待于进一步研究.
- Ni/Fe双金属 /
- 四氯乙烯(PCE) /
- 质量 /
- 粒度 /
- Ni/Fe质量比
Abstract: In order to study the affecting factors in the degradation of chlorinated hydrocarbon, tetrachlrethene (PCE) was selected as target contaminant and Ni/Fe bimetal was used as reactants in batch experiments. The results show: (1) When the mass of Ni/Fe bimetal used in batch experiment was 10 g and 20 g, the reaction rates (k_obs) were 0.047 7 h^-1 and 0.09 7 h^-1, respectively. The more the Ni/Fe bimetal used in PCE degradation, the faster the reaction. (2) The reaction rates (k_obs) were 0.047 7 h^-1, 0.059 8 h^-1 and 0.088 6 h^-1 when Ni/Fe bimetal was 20-40 mesh, 40-65 mesh and 80-100 mesh, respectively. The finer the metal, the faster the reaction. (3) The reaction rates (k_obs) were 0.047 7 h^-1, 0.066 2 h^-1 and 0.073 4 h^-1 when the Ni/Fe mass ratio was 0.024%, 0.048% and 0.072%, respectively. The higher the Ni/Fe mass ratio, the faster the reaction. Further study of the optimum Ni/Fe mass ratio is needed.
- Ni/Fe bimetal /
- tetrachlrethene (PCE) /
- mass /
- grain level /
- Ni/Fe mass ratio

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图 1 1Ni和2Ni体系PCE的ρ_B-t曲线和ln (ρ_B/ρ₀) -t回归曲线

Fig. 1. ρ_B-t curves and ln (ρ_B/ρ₀) -t regression curve of PCE in 1Ni and 2Ni systems

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图 2 不同粒度Ni/Fe系统ρ_B-t曲线和ln (ρ_B/ρ₀) -t回归曲线

Fig. 2. ρ_B-t curves and ln (ρ_B/ρ₀) -t regression curves of PCE using Ni/Fe at different grain levels

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图 3 Ni₁, Ni₂和Ni₃体系中PCE的ρ_B-t曲线和ln (ρ_B/ρ₀) -t回归曲线

Fig. 3. ρ_B-t curves and ln (ρ_B/ρ₀) -t regression curves of PCE in Ni₁, Ni₂ and Ni₃ systems

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表 1 Ni/Fe双金属降解PCE结果

Table 1. PCE degradation using Ni/Fe (μg·L^-1)

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