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作 者:赵良元[1] 胡波 朱迟[1] 高丹英[1] 王博[1] 杨劭[1]
机构地区:[1]华中师范大学湖北省城市水环境生态学重点实验室,湖北武汉430079 [2]湖北天一建筑设计有限公司,湖北武汉430061
出 处:《环境科学与管理》2008年第1期65-69,共5页Environmental Science and Management
基 金:国家水利部948项目资助(200731)
摘 要:为建立一种简单、有效、应用性强的地下水除铁锰方法,研究了Na型斜发沸石除铁锰及其影响因素并建立了再生方法。研究表明Na型斜发沸石对Fe(Ⅱ)和Mn(Ⅱ)均表现出较强的吸附能力,对Fe(Ⅱ)和Mn(Ⅱ)的最大饱和吸附量分别达4.00mg/g和3.50mg/g;且吸附速率快,吸附动力学较好地符合Lagergren一级吸附动力学模型。采用Langmuir吸附等温线能较好描述Bio—F吸附Fe(Ⅱ)(R^2=0.9814)及Mn(Ⅱ)(R^2=0.9899)的过程。该吸附剂在pH6—7范围内可保持90%以上吸附Fe(Ⅱ)和Mn(Ⅱ)的能力。Na型斜发沸石可用15%的NaCl溶液再生,10次再生实验证明其吸附容量可保持100%,研究表明该方法用于高铁锰饮用水处理具有较强的应用价值.Removal efficiencies of Fe (Ⅱ) and Mn (Ⅱ) in drinking water by Na - clinoptilolite and regeneration method was established. It was found that Na -clinoptilolite could effectively remove both Fe(Ⅱ) and Mn(Ⅱ) from water, the maximum adsorption capacities for Fe(Ⅱ) and Mn(Ⅱ) were 4.00 mg/g and 3.50 mg/g respectively. Kinetics data obtained for the adsorption fitted the Lagergren First - order equation. The Langmuir adsorption isotherm was found to fit the experimental data derived from Fe(Ⅱ) ( R^2 = 0. 9814) and Mn (Ⅱ) ( R^2 = 0. 9899) removal. Na - elinoptilolite could be successfully applied for Fe (Ⅱ) and Mn (Ⅱ) removal in natural pH ranges 6 - 7. Regeneration can be easily and effectively performed by using 15% NaCl. 100% regeneration efficiency was achieved after ten times regeneration experiment. The results indicate Na - clinoptilolite can be possibly applied in Fe(Ⅱ) and Mn(Ⅱ) removal from drinking water.
分 类 号:X703.1[环境科学与工程—环境工程]
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