J Water SRT - Aqua 53 (2004) 151-158

Adsorption of divalent manganese ion on manganese-coated sand

Po-Yu Hu, Yung-Hsu Hsieh, Jen-Ching Chen and Chen-Yu Chang

Department of Environmental Engineering, National Chung-Hsing University, 250 Kuo-Kuang Road, Taichung, Chinese Taiwan Tel: +886-4-22855367 Fax: +886-4-22874469 E-mail: byhu@mail2000.com.tw

Department of Environmental Engineering, National Chung-Hsing University, 250 Kuo-Kuang Road, Taichung, Chinese Taiwan Tel: +886-4-22855367 Fax: +886-4-22874469 E-mail: byhu@mail2000.com.tw

Department of Environmental Engineering, National Chung-Hsing University, 250 Kuo-Kuang Road, Taichung, Chinese Taiwan Tel: +886-4-22855367 Fax: +886-4-22874469 E-mail: byhu@mail2000.com.tw

Department of Medical Technology, Chung-Tai Institute of Health Sciences and Technology, No. 11, Pu-Tze Lane, Pei-Tun District, Taichung, Chinese Taiwan

Locally available manganese-coated sand, from packing and a by-product of the filtration process for water treatment plants in Taiwan, was found to be a low cost and promising adsorbent for the removal of Mn²⁺ from raw water. In this work, adsorption and desorption of Mn²⁺ in water have been studied by using batch techniques. The equilibrium adsorption level was determined to be a function of the solution pH, contact time and adsorbate concentration. The equilibrium adsorption capacity of Mn²⁺ was obtained by using a pseudo-Langmuir isotherm. Ion exchange is probably one of the major adsorption mechanisms for binding divalent manganese ions to the coated sand. The results provide a feasible hypothesis of adsorption mechanisms. This study also supplies significant plant operation capacity data for engineering design.

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