|Table of Contents|

Remediation Effects of Arsenic-Contaminated Soil by Red Soil(PDF)

南京师范大学学报(工程技术版)[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2020年01期
Page:
76-83
Research Field:
环境科学与工程
Publishing date:

Info

Title:
Remediation Effects of Arsenic-Contaminated Soil by Red Soil
Author(s):
Li Qun12Zhou Yan12Zhang Shengtian12Wan Jinzhong12Zheng Liping12Feng Yanhong12Wang Fenghe3Fan Tingting12
(1.Nanjing Institute of Environmental Sciences,Ministry of Ecology and Environment,Nanjing 210042,China)(2.State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control,Nanjing 210042,China)(3.School of Environment
Keywords:
red soilAscontaminated soilavailabilityAs fractionation
PACS:
X53
DOI:
10.3969/j.issn.1672-1292.2020.01.011
Abstract:
To seek a green amendment for arsenic(As)contaminated agricultural soil,red soil is used as green amendment for As in this study,which comes from the natural environment. Firstly,static adsorption experiment is performed to investigate the adsorption characteristics of As on red soil. Then the effects of the As availability and changes of As fractionations are investigated by adding red soil into the contaminated agricultural soils. The results of static adsorption experiment indicate that Freundlich adsorption isotherm model can better describe the isotherm process of adsorption. The percentage of exchangeable As and water-soluble As decreases,while the percentage of oxidizable As increases by adding red soil. The percentage of exchangeable As is negatively correlated with the amount of red soil(R20.05=0.991). Both extractable-As(with water or NaHCO3)and the acute toxicity to luminescent bacteria are decreased significantly after the addition of red soil,suggesting that the addition of red soil can reduce the bioavailability of As in the contaminated soil.

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Last Update: 2020-03-15