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Phosphate Removal from Wastewater by Surface-Modified Pinus rigida Powder  

Jeong, Myoung-Sun (강원대학교 환경공학과)
Kim, Yeong-Kwan (강원대학교 환경공학과)
Publication Information
Journal of Korean Society of Water and Wastewater / v.25, no.2, 2011 , pp. 241-248 More about this Journal
Abstract
This research was performed to evaluate the efficacy of phosphate removal from wastewater by surface-modified wood powder and to clarify the removal mechanisms. In this work, Pinus rigida which is abundant in Korea and has little economic value was used in preparation of the wood powder as a sorbent material. The experiments were carried out in 2 phases, isothermal adsorption test and column test. The results of adsorption test fitted well both the Langmuir and Freundlich isothermal equations. Adsorption capacity was highest with the bark powder followed by the mixed powder(50% bark powder and 50% woody powder) and woody powder. Phosphate removal efficiency was as high as 98% at initial phosphate concentration of 50mg/L. Specific surface area of the powder increased following the experiment and phosphate removal was speculated to occur through adsorption mechanism. Energy dispersive X-ray analysis(EDXA) revealed that the phosphate adsorbed onto the surface of the powder was in the form of strengite($FePO_{4}$).
Keywords
Pinus rigida; phosphate; isothermal; adsorption; mechanism;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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