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首页> 外文期刊>Journal of Environmental Science and Health >Sorption kinetics of arsenic on laterite soil in aqueous medium
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Sorption kinetics of arsenic on laterite soil in aqueous medium

机译：水介质中砷在红土土壤上的吸附动力学

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摘要

The efficiency of a locally available laterite soil in removing both arsenite and arsenate from aqueous medium by adsorption was evaluated. It was observed that in batch experiment conducted at 0.5 mg/L initial concentration of arsenic, laterite soil could remove up to 98% of arsenite and 95% of arsenate under optimized conditions. The kinetic profiles under various conditions were developed. Both arsenite and arsenate removal followed pseudo-second order reaction kinetic model. Pore and film diffusion coefficients were determined from the half-time equation and film diffusion appeared to be the rate-limiting. This was further supported by multiple interruption tests.
机译：评估了当地可用的红土土壤通过吸附从含水介质中去除砷和砷的效率。观察到在砷初始浓度为0.5 mg / L的分批实验中，在最佳条件下，红土土壤最多可去除98％的砷和95％的砷。建立了在各种条件下的动力学曲线。砷和砷的去除均遵循伪二级反应动力学模型。孔隙率和薄膜扩散系数由半时方程确定，薄膜扩散似乎是速率限制。多次中断测试进一步支持了这一点。

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