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首页> 外文期刊>RSC Advances >Algal biomass from the stable growth phase as a potential biosorbent for Pb(II) removal from water
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Algal biomass from the stable growth phase as a potential biosorbent for Pb(II) removal from water

机译：稳定生长期的藻类生物质可作为潜在的生物吸附剂从水中去除Pb（II）

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In this study, the effect of the growth phase on the Pb(II) removal performance from water using Chlorella sp. QB-102 dry biomass was investigated. Optimum biosorption conditions were determined as a function of initial solution pH and contact time. Freundlich isotherm and pseudo-second-order kinetics models were found to be most applicable to Pb(II) adsorption on biomass from each growth phase. The maximum adsorption capacities of Pb(II) were found to be 205.5, 298.5 and 171.9 mg g?1 for logarithmic, stable and decline phases of biosorbents, respectively. The FT-IR, XPS and potentiometric titration results showed that the lack of phosphoryl groups caused the lowest adsorption efficiency for the decline phase, and the more effective active sites in carboxyl and higher site concentrations of hydroxyl and phosphoryl functional groups led to most of the bioadsorption occurring during the stable phase. Thus, algal biomass from the stable phase can be used as a potential adsorbent for heavy metal removal from water.
机译：在这项研究中，生长期对使用 Chlorella sp去除水中Pb（ II ）性能的影响。研究了QB-102干生物质。确定最佳的生物吸附条件是初始溶液pH和接触时间的函数。发现Freundlich等温线和伪二级动力学模型最适用于各个生长期对生物量的Pb（ II ）吸附。发现Pb（ II ）对数，稳定和下降相的最大吸附容量分别为205.5、298.5和171.9 mg g ？1 分别的生物吸附剂。 FT-IR，XPS和电位滴定结果表明，磷酸基团的缺乏导致还原相的吸附效率最低，羧基上更有效的活性位点以及较高的羟基和磷酸基官能团浓度导致了大部分生物吸附发生在稳定阶段。因此，来自稳定相的藻类生物质可以用作从水中去除重金属的潜在吸附剂。

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