Application of AMDS mortar as a treatment agent for arsenic in subsurface environment
- Application of AMDS mortar as a treatment agent for arsenic in subsurface environment
- 이우람; 윤현식; 지은도; 박영태; 심은정; 이승진; 김윤수; 이진수; 최재영
- heavy metal; Arsenic; AMDS
- Issue Date
- 한국지구시스템공학회지 (구-한국자원공학회지)
- 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.
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