Sorption characteristics of cadmium in a clay soil of Mae Ku creek, Tak Province, Thailand

8th International Conference on Future Environment and Energy

生态环境科学;能源学

Thunyawatcharakul, P.^1,2 ; Chotpantarat, S.^2,3,4,5

International Postgraduate Program in Hazardous Substance and Environmental Management, Graduate School, Chulalongkorn University, Bangkok

10330, Thailand^1

Center of Excellence on Hazardous Substance Management (HSM), Chulalongkorn University, Pathumwan, Bangkok

10330, Thailand^2

Department of Geology, Faculty of Science, Chulalongkorn University, Bangkok

10330, Thailand^3

Research Program of Toxic Substance Management in the Mining Industry, Center of Excellence on Hazardous Substance Management (HSM), Bangkok

10330, Thailand^4

Research Unit of Green Mining (GMM), Chulalongkorn University, Bangkok

10330, Thailand^5

关键词: Contaminated soils;    Freundlich constants;    Freundlich isotherm;    Health effects;    Initial concentration;    Renal dysfunction;    Sorption behaviors;    Sorption characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/150/1/012009/pdf
DOI  :  10.1088/1755-1315/150/1/012009

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Mae Sot is a district in Tak province, the northern part of Thailand where has encountered with cadmium (Cd) contaminated in soils. Exposure of Cd can lead to severe health effect, for examples, bone softening, osteoporosis, renal dysfunction, and Itai-Itai disease. This study aims at elucidating sorption behavior of Cd in the contaminated soil collected from Mae Ku creek, Mae Sot district, Thailand. Batch sorption experiment was conducted in order to investigate sorption characteristics of Cd onto the contaminated soil. The soil sample taken from the study area consists of 26% sand, 16% silt 58% clay, which categorized as a clay soil, based on USDA classification. Soil pH is slightly alkaline (pH∼7.7) and organic matter in the soil is 2.93%. The initial concentration in the batch sorption experiment was in the range from 0- 200 ppm. The result from the batch sorption experiment showed that soil sample can adsorb Cd up to 173.5 ppm and the sorption behavior of the soil sample can be well described by Freundlich isotherm, indicating the multilayer sorption (R2= 0.9964), with Freundlich constants of 0.312 and 1.760 L g-1for 1/n and Kf, respectively.