Article ID Journal Published Year Pages File Type
588844 Process Safety and Environmental Protection 2007 5 Pages PDF
Abstract

Thiocyanate (SCN−) is used in many industrial processes and is found in industrial wastewaters. Adsorptive removal of thiocyanate by surfactant-modified coir pith, an unwanted byproduct of coir fibre industry was studied. Cationic surfactant, hexadecyltrimethylammonium bromide was used as modifier. Optimum pH for maximum adsorption of SCN− was found to be 2.0. Langmuir, Freundlich and Dubinin Radushkevich (D-R) isotherms were used to model the adsorption equilibrium data and the system followed all the three isotherms and the adsorption capacity of the adsorbent was found to be 8.6 mg g−1. Kinetic studies show that the adsorption obeyed second order. Desorption studies showed that upto 90% recovery of SCN− from the spent adsorbent was feasible. Effect of foreign anions on the adsorption of SCN− was also examined.

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Physical Sciences and Engineering Chemical Engineering Chemical Health and Safety
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