Characteristics of adsorption of arsenic by red soil from sandstone weathering

Author

Chen, Hongwei ; Liu, Lin ; Zhao, Jie ; Peng, Xiangxun ; Zhang, Dewu

Author_Institution

Sch. of Hydraulic Eng., Changsha Univ. of Sci. & Technol., Changsha, China

fYear

2011

fDate

24-26 June 2011

Firstpage

3910

Lastpage

3912

Abstract

Treatment of arsenic in drinking water has been a difficult problem, especially in the countryside, because of its high cost and inconvenience. Red soil has a relatively high clay minerals and iron and aluminum compounds and must be a natural material to solve this problem. Experimental results show that the red soil from Yuelu mountain had a high arsenic removal rate of 97.1% after 24 hours. The isothermal adsorption fitted with Langmuir and Freundlich equations well, and the adsorption capacity was 500.20mg/kg. Kinetic data was consistent with the pseudo-second order kinetic equation, and the reaction rate was controlled mainly by chemical adsorption.

Keywords

adsorption; aluminium compounds; arsenic; clay; environmental degradation; iron compounds; minerals; reaction rate constants; soil; water treatment; Freundlich equations; Langmuir equations; Yuelu mountain; adsorption capacity; aluminum compounds; arsenic removal rate; arsenic treatment; chemical adsorption; clay minerals; drinking water; iron compounds; isothermal adsorption; kinetic data; pseudo-second order kinetic equation; reaction rate; red soil; sandstone weathering; Diseases; Equations; Iron; Kinetic theory; Soil; Water; Water resources; Adsorption kinetics; Arsenic removal; Red soil; Sandstone;

fLanguage

English

Publisher

ieee

Conference_Titel

Remote Sensing, Environment and Transportation Engineering (RSETE), 2011 International Conference on

Conference_Location

Nanjing

Print_ISBN

978-1-4244-9172-8

Type

conf

DOI

10.1109/RSETE.2011.5965173

Filename

5965173