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Coconut bagasse, an agricultural solid waste was used as biosorbent for the removal of cadmium after modification with thiourea.The adsorption of Cd2+ was studied at pH 5.5.Langmuir, Freundlich, and Temkin isotherms were used to model the adsorption equilibrium data, and it was found that the system followed the Langmuir and Temkin isotherms.The adsorption capacity of the biosorbent was found to be 35.97mg g -1 , which is higher or comparable to the adsorption capacity of various adsorbents reported in literature.Kinetic studies showed that the adsorption followed a pseudo-second-order rate model.
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Neto et al. (2012) studied this question.
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