Use of Powdered Cockle Shell as a Bio‐Sorbent Material for Phosphate Removal from Water

Bulletin of the Korean Chemical Society

Youngjung Kim¹  Shin Wook Kang²  Daeik Kim³ 

[1] Center for Instrumental Analysis Andong National University Andong 36729 South Korea;Department of Applied Chemistry Andong National University Andong 36729 South Korea;School of Electrical, Electronic Communication, and Computer Engineering Chonnam National University Yeosu 59626 South Korea

关键词: Phosphate;    Powdered cockle shell;    Calcium carbonate;    Bio‐;    sorbent;    Aragonite;   

DOI  :  10.1002/bkcs.11606

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

In this study, powdered cockle shell was used as a bio‐sorbent material for the removal of phosphates in water. The SEM–EDX, XRD, and FT‐IR analyses showed that calcium carbonate (CaCO3) exists in aragonite state in powdered cockle shell. The influences of pH, initial phosphate concentrations and contact time were conducted in a series of batch sorption experiments. Among the various factors studied, the pH was turned out to be a key variable for phosphate removal. Based on the experimental results for pH, it was found that the phosphate is chemically sorbed onto aragonite surface. At lower phosphate concentration, roughly 88% of sorption efficiency was accomplished by powdered cockle shell. The Pseudo‐second‐order kinetic and the Langmuir isotherm model were fitted well to the sorption experimental data of phosphate because of their higher correlation coefficients (R2).

【 授权许可】

Unknown