The Removal of Mercury from Wasterwater by Using Fishwater Fish Scales

Jing Shu; Yuan Peng; Cong Dao Pan; Xian Zhong Cheng; Li Deng

doi:10.4028/www.scientific.net/AMR.781-784.1977

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The Removal of Mercury from Wasterwater by Using Fishwater Fish Scales

Abstract:

The adsorption of freshwater fish scales were used to remove Hg²⁺ in industrial wastewater. The effects of pH, shaking time, initial concentration on the adsorption Hg²⁺ onto freshwater fish scale were investigated. In these conditions, by varying the pH of the mercury (II) solutions from 2 to 8, the removal efficiency remained higher than 96%. Optimal adsorption capacity was 117.2 mg g^-1 at pH 6.0. Characterization of the biosorbent fish scales was performed using scanning electron microscope (SEM), and Fourier transform-infrared (FTIR) spectroscopy. The mechanism for the adsorption was studied. The adsorption of Hg²⁺on to freshwater fish scale could be described by Langmuir isotherm model.