Enhanced electrokinetic remediation of cadmium-contaminated natural clay using organophosphonates in comparison with EDTA

Yingying Gu; Albert T. Yeung; Hongjiang Li

doi:10.1016/j.cjche.2017.10.012

Your Location：

Home >

Browse articles >

Enhanced electrokinetic remediation of cadmium-contaminated natural clay using organophosphonates in comparison with EDTA

Energy, Resources and Environmental Technology | Updated：2026-01-06

- Enhanced electrokinetic remediation of cadmium-contaminated natural clay using organophosphonates in comparison with EDTA
- Chinese Journal of Chemical Engineering Vol. 26, Issue 5, Pages: 1152-1159(2018)
- Affiliations：
  
  1. 2 Department of Engineering, The University of Hong Kong, Pokfulam Road,Hong Kong,China
  2. 3 Qingdao Water Group Co. Ltd.,Qingdao,China,266002
  3. 4 College of Mining Civil Engineering, Taiyuan University of Technology,Taiyuan,China,030024
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2017.10.012
  CLC：
- Published：2018
- Accepted：
Scan QR Code
Yingying Gu, Albert T. Yeung, Hongjiang Li. Enhanced electrokinetic remediation of cadmium-contaminated natural clay using organophosphonates in comparison with EDTA[J]. Chin.J.Chem.Eng., 2018, 26(5): 1152-1159.
DOI：

Yingying Gu, Albert T. Yeung, Hongjiang Li. Enhanced electrokinetic remediation of cadmium-contaminated natural clay using organophosphonates in comparison with EDTA[J]. Chin.J.Chem.Eng., 2018, 26(5): 1152-1159. DOI： 10.1016/j.cjche.2017.10.012.

摘要

Abstract

Soil contamination by metals is a worldwide environmental problem. Electrokinetic extraction is a promising technology for in-situ remediation of contaminated soils of low hydraulic permeability. However

the extraction of metals is usually hindered by the high buffer capacity of natural soils. Organophosphonates are strong metal chelates as ethylenediaminetetraacetic acid (EDTA) which has been widely studied in the enhancement of electrokinetic remediation. In this study

batch desorption experiments and bench-scale electrokinetic extraction experiments were carried out to study the effect of two organophosphonates

i.e.

(nitrilotrimethylene)triphosphonate (NTMP) (ethylenedinitrilo)-tetramethylenephosphonate (EDTMP)

on the extraction of cadmium from a natural clay in comparison with EDTA. Results of the batch desorption experiments showed that more than 75% of the sorbed cadmium could be dissolved into solution using 0.1 mol·L

-1

organophosphonates or EDTA in the wide pH range of 1-11. Results of the electrokinetic extraction experiments showed that the cadmium spiked in the specimen migrated towards the anode with the enhancement

of NTMP

EDTMP

and EDTA under a constant voltage gradient of approximately 1.0 V·cm

-1

. Although cadmium mobilization enhanced by EDTA was more efficient than that by the organophosphonates

accumulation of cadmium was observed in the vicinity of the anode. The average removal efficiencies of cadmium from the soil after approximately 5 days of electrokinetic extraction enhanced by 0.1 mol·L

-1

NTMP (22.8%) and EDTMP (22.4%) were higher than that by 0.1 mol·L

-1

EDTA (15.1%).

关键词

Keywords

references

Views

229

Downloads

CSCD

Alert me when the article has been cited

Submit

Tools

Publicity Resources

Controllable synthesis of Ni3S2/V3S4@NF-xF(x=0, 4, 8) catalysts for efficient hydrogen production in seawater and urea electrolyte

Enhanced mass transfer in flexible electrodes of open-pore cobalt disulfide nanosheets supported on sulfur-doped carbon fibers for efficient zinc-air batteries

Dew-point corrosion process in the atmospheric tower: Integration of electrochemical analysis and interpretable machine learning

Bio-templated graphitic carbon architectures enable high-rate and durable LiFePO4 cathodes for sustainable lithium-ion batteries

Citric acid-modified silicon anode with dual carbon stress modulation for stable lithium storage

Related Author

Wen Wei

Meng Xiangyu

Liu Min

Du Xiaoqiang

Zhang Xiaoshuang

Yu Yanjie

Zhao Jiayu

Cui Yaman

Related Institution

Department of Chemistry, Xinzhou Normal University

Henan Provincial Key Laboratory of Nanocomposites and Applications, Institute of Nanostructured Functional Materials, Huanghe Science and Technology College

School of Chemistry and Chemical Engineering, North University of China

School of Environment and Safety Engineering, North University of China

Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University

⁰