Application of AMDS mortar as a treatment agent for arsenic in subsurface environment

Title
Application of AMDS mortar as a treatment agent for arsenic in subsurface environment
Authors
이우람윤현식지은도박영태심은정이승진김윤수이진수최재영
Keywords
heavy metal; Arsenic; AMDS
Issue Date
2013-05
Publisher
한국지구시스템공학회지 (구-한국자원공학회지)
Abstract
Among the treatment technologies available for As in soil and groundwater, adsorption or precipitation using acid mine drainage (AMD) sludge has become a promised technique because of high efficiency, inexpensiveness and simple to handling. The adsorbents were prepared by addition of Cement, Joomoonjin sand, fly ash and Ca(OH)2 to air dry AMD sludge. In this work, the adsorption of As (III) and As (V) on AMDS mortar has been studied as a function of kinetic, pH, and initial arsenic concentration. Results of batch study showed that 75-90% of both As (III) and As (V) were removed at pH 7. Arsenic adsorption capacities were the highest at neutral pH condition and the adsorption equilibrium time reached in 7 days using AMDS mortar. Additionally, the adsorption kinetic process is expressed well by pseudo-first-order or pseudo-second-order. The adsorption capacities of AMDS mortar for As(III) and As(V) were found 19.04 and 30.75mg g-1 respectively. The results of arsenic adsorption were fitted well to the Langmuir model rater than Freundlich model. Based on experimental results in this study, we could conclude that AMDS mortar can be effectively used for arsenic removal agent from subsurface environment.
URI
http://pubs.kist.re.kr/handle/201004/45038
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KIST Publication > Conference Paper
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