The adsorption capabilities and characteristics of Fe and Mn * in water by a new bioadsorbent (Bio-F) were studied. It was found that Bio-F could effectively remove Fe2*and Mn2* simultaneously from water via adsorption,and the adsorption kinetics data fitted the Lagergren first-order equation. The adsorption process of Fe2* and Mn2* removal could be described by the Langmuir adsorption isotherm. The maximum adsorption capacities for Fe * and Mn * were 4. 91 and 3. 80 mg/g respectively, and the adsorption process was an endothermic process. The removal rates of Fe2 * and Mn2 * were maintained above 86% at pH 6-7 ( P > 0. 05 ). The removal rates of Fe2 * and Mn * were significantly inhibited by Ca * and Mg2* at high concentrations (P >0. 05). In contrast,the removal rates were enhanced by PO43' ( P > 0. 05 ). The removal rates reached 97. 27% for Fe2 * and 94. 67% for Mn2 * after ten regenerations. Since Bio-F is non-toxic, the results indicated that Bio-F could be potentially applied for Fe * and Mn * removal from drinking water in rural areas.%以Bio-F( Bio-F生物吸附剂)为材料,研究其对水中Fe2+和Mn2+的去除能力与特性.结果表明,Bio-F可同时去除水中Fe2+和Mn2+且吸附过程符合Lagergren一级动力学模型.Langmuir吸附等温线能较好地描述Bio-F吸附Fe2+和Mn2+的过程,表现为单分子层化学优惠吸附,其对Fe2+和Mn2+的最大饱和吸附量分别达4.91和3.80 mg/g.Bio-F对Fe2+和Mn2+的吸附为吸热反应且在pH 6～7范围内可保持86％以上吸附能力(P＞0.05).较高的c(Ca2+)和c(Mg2+)可明显抑制Bio-F去除Fe2+和Mn2的能力(P＜0.05),但高c( PO43-)则可促进该吸附过程(P＞0.05).Bio-F经10次再生后对Fe2+和Mn2+的去除率分别达97.27％和94.67％.Bio-F无毒安全,采用Bio-F处理高铁锰饮用水具有应用潜力.
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