Inorganic mercury was effectively removed from water solutions by means of dry biomass of Arthrospira (Spirulina) platensis as biosorbent. The results obtained at defined pH and biomass concentration as well as variable Hg concentrations were used to estimate biosorption kinetics and isotherm parameters. Biosorption kinetics was best described by the pseudo‐first‐order model of Lagergren that allowed estimating an average specific rate constant as high as 0.044 min⁻¹, while the Dubinin and Radushkevich model was the best fitting isotherm. Hg biosorption seemed to occur via physisorption. Considering the wide dissemination of A. platensis and its easy cultivation, these results point to its biomass as a low‐cost biosorbent to treat Hg‐contaminated waters.

中文翻译：

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钝顶螺旋藻干生物质对汞的吸附动力学及等温线

借助于节肢动物螺旋藻（Spirulina）的干燥生物质作为生物吸附剂，可以有效地从水溶液中去除无机汞。在确定的pH和生物量浓度以及可变的Hg浓度下获得的结果用于估算生物吸附动力学和等温线参数。Lagergren的拟一阶模型最好地描述了生物吸附动力学，该模型允许估计高达0.044 min ^-1的平均比速率常数，而Dubinin和Radushkevich模型是最佳拟合等温线。汞的生物吸附似乎是通过物理吸附发生的。考虑到A. platensis的广泛传播和易于种植，这些结果表明其生物质是一种低成本的生物吸附剂，用于处理受汞污染的水。