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首页> 外文期刊>Saudi Journal of Biological Sciences >Potential use of green algae as a biosorbent for hexavalent chromium removal from aqueous solutions
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Potential use of green algae as a biosorbent for hexavalent chromium removal from aqueous solutions

机译：潜在使用绿藻作为生物吸附剂从水溶液中去除六价铬

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The hexavalent chromium Cr(VI) poses a threat as a hazardous metal and its removal from aquatic environments through biosorption has gained attention as a viable technology of bioremediation. We evaluated the potential use of three green algae ( Cladophora glomerata , Enteromorpha intestinalis and Microspora amoena ) dry biomass as a biosorbent to remove Cr(VI) from aqueous solutions. The adsorption capacity of the biomass was determined using batch experiments. The adsorption capacity appeared to depend on the pH. The optimum pH with the acid-treated biomass for Cr(VI) biosorption was found to be 2.0 at a constant temperature, 45?°C. Among the three genera studied, C. glomerata recorded a maximum of 66.6% removal from the batch process using 1.0?g dried algal cells/100?ml aqueous solution containing an initial concentration of 20?mg/L chromium at 45?°C and pH 2.0 for 60?min of contact time. Langmuir and Freundlich isotherm equations fitted to the equilibrium data, Freundlich was the better model. Our study showed that C. glomerata dry biomass is a suitable candidate to remove Cr(VI) from aqueous solutions.
机译：六价铬Cr（VI）作为一种有害金属构成威胁，通过生物吸附将其从水生环境中去除已成为一种可行的生物修复技术而受到关注。我们评估了三种绿藻（Cladophora glomerata，肠小肠Enteromorpha intestinalis和Microspora amoena）干燥生物质作为生物吸附剂从水溶液中去除Cr（VI）的潜在用途。使用分批实验确定生物质的吸附能力。吸附能力似乎取决于pH。发现在45°C的恒定温度下，用酸处理的生物质进行Cr（VI）生物吸附的最佳pH为2.0。在研究的三个属中，使用1.0？g干燥藻细胞/ 100？ml含45？C初始浓度为20？mg / L铬的水溶液和1.0？g干燥藻类细胞记录的批次过程中，C。glomerata的最大去除率为66.6％。 pH 2.0，持续60分钟的接触时间。 Langmuir和Freundlich等温方程适合平衡数据，Freundlich是更好的模型。我们的研究表明，C。glomerata干生物质是从水溶液中去除Cr（VI）的合适候选人。

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