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首页> 外文期刊>Journal of Chemical Technology & Biotechnology >Investigation of zinc (II) adsorption on cladophora crispata in a two-staged reactor
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Investigation of zinc (II) adsorption on cladophora crispata in a two-staged reactor

机译：两阶段反应器中番茄（Cladophora crispata）上锌（II）的吸附研究

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摘要

In this study, the adsorption of zinc(II) ions on Cladophora crispata, a green alga, was studied with respect to initial pH, temperature, initial metal ion and biomass concentration in order to determine the optimum adsorption conditions. Optimum initial pH values for zinc (U) ions were found to be 5.0 at optimum temperature, 25deg C. The initial adsorption rates increased with increasing initial zinc(II) ion concentration up to l00mgdm~(-3). The Freundlich and Langmuir adsorption isotherms were developed at various initial pH and temperature values. Then, the adsorption of zinc(II) ions to C crispata was investigated in a two-staged mixed batch reactor. The residual metal ion concentrations (Ceq) at equilibrium at each stage for a given quantity of dried algae (X)Ivolume of solution containing heavy metal ion (I2~,) ratio were calculated by using Freundlich and Langmuir isotherm constants. It was observed that the experimental biosorption equilibrium data for zinc(II) ions are in good agree-ment with those calculated using both Freundlich and Langrnuir models. The adsorbed zinc(ff) ion concentration increased with increasing X_0/V_0 ratios while the adsorbed metal quantities per unit mass of dried algae decreased.
机译：在这项研究中，针对初始pH，温度，初始金属离子和生物质浓度研究了绿藻Cladophora crispata上锌（II）离子的吸附，以确定最佳的吸附条件。发现锌（U）离子的最佳初始pH值在25°C的最佳温度下为5.0。初始吸附速率随初始锌（II）离子浓度增加至100mgdm〜（-3）而增加。 Freundlich和Langmuir的吸附等温线是在各种初始pH和温度值下发展的。然后，在两步混合间歇式反应器中研究了锌离子对C松香的吸附。对于给定数量的干燥藻类（X），在每个阶段处于平衡状态的残余金属离子浓度（Ceq）通过使用Freundlich和Langmuir等温常数计算出含有重金属离子（I2，）比的溶液的体积。可以观察到，锌（II）离子的实验生物吸附平衡数据与使用Freundlich和Langrnuir模型计算的数据非常吻合。随着X_0 / V_0比的增加，吸附的锌（ff）离子浓度增加，而单位质量干藻的吸附金属量减少。

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