산업폐기물을 이용한 수용액 중 인산염의 흡착 제거
Phosphate Removal of Aqueous Solutions using Industrial Wastes
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초록
The present study was conducted to investigate phosphate removal from aqueous solution using industrial wastes, red mud (RM),acid treated red mud (ATRM) and converter furnace steel slag (CFSS). The chemical composition of adsorbents was analyzed usingX-ray fluorescence (XRF). Batch experiments and elution experiments using water tank were performed to examine environmentalfactors that influences on phosphate removal. Kinetic sorption data of RM, ATRM, and CFSS were described well by the pseudosecond-order kinetic sorption model, and equilibrium sorption data of all adsorbents obeyed Freundlich isotherm model. The adsorptioncapacities of adsorbents followed order: ATRM (7.06 mg/g)＞RM (4.34 mg/g)＞CFSS (1.88 mg/g). Increasing pH from 3 to 11, theamount of adsorbed phosphate on all RM, ATRM, and CFSS were decreased. The presence of sulfate and carbonate decreased thephosphate removal of RM and ATRM but did not influence on the performance of CFSS. The phosphate removal of RM, ATRM,and CFSS was greater in seawater than deionized water, resulting from the presence of cations in seawater. The water tank elutionexperiments showed that RM capping blocked the elution of phosphate effectively. It was concluded that the adsorbents can besuccessfully used for the removal of the phosphate from the aqueous solutions.
Abstract
The present study was conducted to investigate phosphate removal from aqueous solution using industrial wastes, red mud (RM),acid treated red mud (ATRM) and converter furnace steel slag (CFSS). The chemical composition of adsorbents was analyzed usingX-ray fluorescence (XRF). Batch experiments and elution experiments using water tank were performed to examine environmentalfactors that influences on phosphate removal. Kinetic sorption data of RM, ATRM, and CFSS were described well by the pseudosecond-order kinetic sorption model, and equilibrium sorption data of all adsorbents obeyed Freundlich isotherm model. The adsorptioncapacities of adsorbents followed order: ATRM (7.06 mg/g)＞RM (4.34 mg/g)＞CFSS (1.88 mg/g). Increasing pH from 3 to 11, theamount of adsorbed phosphate on all RM, ATRM, and CFSS were decreased. The presence of sulfate and carbonate decreased thephosphate removal of RM and ATRM but did not influence on the performance of CFSS. The phosphate removal of RM, ATRM,and CFSS was greater in seawater than deionized water, resulting from the presence of cations in seawater. The water tank elutionexperiments showed that RM capping blocked the elution of phosphate effectively. It was concluded that the adsorbents can besuccessfully used for the removal of the phosphate from the aqueous solutions.
참고문헌 (27)
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