Remediation of contaminated soil and groundwater using chemical reduction and solidification/stabilization method: a case study

2020 ◽  
Author(s):  
Shi-Feng Lu ◽  
Yu-Lin Wu ◽  
Zhan Chen ◽  
Tao Li ◽  
Chao Shen ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Chemical Reduction ◽  
Stabilization Method

Bioremediation Of Oil Contaminated Soil At South Santhal CTF, Mehsana, India: A Case Study

2007 ◽  
Author(s):  
Ajoy Kumar Mandal ◽  
Priyangshyu Manab Sarma ◽  
Manish Dwivedi ◽  
Abu Swaleh ◽  
Banwari Lal ◽  
...  
Keyword(s):  
Contaminated Soil

Case Study of Demonstration Project of Typical Chrome Contaminated Sites Remediation

2011 ◽  
Vol 414 ◽  
pp. 203-213 ◽  
Author(s):  
Xing Run Wang ◽  
Xiang Hua Yan ◽  
Qi Wang
Keyword(s):  
Chemical Reduction ◽  
Quality Standard ◽  
Demonstration Project ◽  
Ex Situ ◽  
Contaminated Sites ◽  
Advanced Treatment ◽  
Filter Bed ◽  
Daily Capacity ◽  
Shallow Part

It studied the geological properties and contamination characteristics of soil from contaminated sites of typical chromate plants in western plateau of China. The results indicated that in the shallow part of 0-4m, it was mainly loess-like soil and in the depth of 4-18m, it was mainly gravels and pebbles. The soil had better permeability and ex-situ washing treatment is recommended. The soil was severely contaminated and the concentration of chrome (Ⅵ) was as high as 16,000mg/kg. Based on the analysis, it developed a two-stage demonstration project of countercurrent ex-situ washing plus chemical stabilization with daily capacity of 20m3 soil and a demonstration project of chemical reduction and precipitation plus advanced treatment of filter bed with daily capacity of 200m3 wastewater. After treatment, the concentration of chrome (Ⅵ) in soil was less than 100mg/kg and that in water was reduced to below 0.05mg/L from 1,000mg/L, which can meet the requirements of third-grade groundwater quality standard.

Experimental Study on Stabilization of Chromium Contaminated Soil

2011 ◽  
Vol 414 ◽  
pp. 273-279
Author(s):  
Ji Da Chen ◽  
Li Liu ◽  
Li Wei Zhang ◽  
Shi Guo Liao ◽  
Yong Ting Song ◽  
...  
Keyword(s):  
Experimental Study ◽  
Contaminated Soil ◽  
Critical Value ◽  
Polluted Soil ◽  
Pyrrolidine Dithiocarbamate ◽  
Stabilization Method ◽  
Toxicity Assay ◽  
Long Time ◽  
Stabilization Effect ◽  
Ammonium Pyrrolidine Dithiocarbamate

To develope a practicable stabilization method for remediation chromium contaminated soil, reductant and chelate reagent were investigated for stabilization artificical chromium contaminated soil, and the stabilization effect was tested through extraction toxicity assay after stablized soil was oxidized at pH 12. The experimental results showed that the composition of sodium bisulfite & ammonium pyrrolidine dithiocarbamate was an ideal stabilizer of chromium in soil, and the extraction toxicity was much less than that of classical stabilized chromium polluted soil with only reductant or the maximum critical value in GB16889-2008, which suggested that the composition of reductant & compound of dithiocarbamate might be practically appllied for remediation chromium contaminated soil because it was likely to remain chromium much more stable in soil for a long time and significantly decrease Cr mobility.

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