钢渣对亚铁离子和硫离子的吸附-解吸特性

采用静态批式法研究钢渣对亚铁离子（Fe2＋）和还原态硫离子（S2-）的吸附行为,探讨溶液pH、环境温度及溶液离子强度对钢渣吸附Fe2＋和S2-特性的影响,并进一步通过解吸试验了解钢渣吸附态Fe2＋和S2-的稳定性.结果表明：钢渣吸附Fe2＋和S2-的动力学过程均符合Elovich动力学模型,相关系数分别为0.94和0.89;Fe2＋和S2-在钢渣上等温吸附特征能较好地用Freundlich等温吸附模型表达,相关系数分别为0.97和0.94;钢渣对Fe2＋和S2-的吸附为非优惠型吸附,其中对Fe2＋的吸附为非自发反应,对S2-的吸附为自发反应;钢渣对Fe2＋和S2-的吸附过程主要为化学吸附,是一...

Full description

Saved in:
Bibliographic Details
Published in浙江大学学报（农业与生命科学版） Vol. 41; no. 4; pp. 465 - 475
Main Author 谢晓梅 廖敏 华嘉媛 陈娜 张楠 徐培智 解开治 徐昌旭 刘光荣
Format Journal Article
LanguageChinese
Published 浙江大学环境与资源学院，浙江省亚热带土壤与植物营养重点研究实验室，杭州 310058%广东省农业科学院土壤肥料研究所,广州,510640%江西省农业科学院土壤肥料与资源环境研究所,南昌,330200 2015
Subjects
亚铁离子
吸附剂
还原态硫离子
钢渣
ferrous ion
adsorbent
钢渣
亚铁离子
steel slag
还原态硫离子
吸附剂
reduced sulfur ion
Online AccessGet full text
ISSN1008-9209
DOI10.3785/j.issn.1008-9209.2014.05.131

Cover

More Information
Summary:采用静态批式法研究钢渣对亚铁离子（Fe2＋）和还原态硫离子（S2-）的吸附行为,探讨溶液pH、环境温度及溶液离子强度对钢渣吸附Fe2＋和S2-特性的影响,并进一步通过解吸试验了解钢渣吸附态Fe2＋和S2-的稳定性.结果表明：钢渣吸附Fe2＋和S2-的动力学过程均符合Elovich动力学模型,相关系数分别为0.94和0.89;Fe2＋和S2-在钢渣上等温吸附特征能较好地用Freundlich等温吸附模型表达,相关系数分别为0.97和0.94;钢渣对Fe2＋和S2-的吸附为非优惠型吸附,其中对Fe2＋的吸附为非自发反应,对S2-的吸附为自发反应;钢渣对Fe2＋和S2-的吸附过程主要为化学吸附,是一个吸热过程,高温有利于吸附作用的进行;钢渣对Fe2＋的吸附以内层配位为主,对S2-的吸附以外层络合为主;钢渣具有较大的pH适应性,一定范围内的pH （1.50~11.50）变化对钢渣吸附Fe2＋和S2-影响不大;同时,随着离子强度的增加钢渣对Fe2＋的吸附量变化不明显, 但对S2-的吸附量显著减少.总之,钢渣吸附态Fe2＋和S2-具有较好的稳定性,在不同pH条件及离子强度下吸附的Fe2＋和S2-解吸率很低,说明钢渣可作为Fe2＋和S2-良好的吸附材料加以利用.
Bibliography:Summary Ferrous ion （Fez＋） and reduced sulfur ion （S2 ） were main toxic elements in the cold waterlogged paddy soil. How to remove Fe2＋ and S2- effectively was the key to improve the quality of cold waterlogged paddy soil. Steel slag has been confirmed as a good sorption material in waste water treatments for some heavy metals and organic pollutants. These properties suggested that steel slag might have the ability to adsorb and fix Fez＋ and S2 from cold waterlogged paddy soil, and improve the quality of cold waterlogged paddy soil by reducing Fe2＋ and S2- The characteristics of Fe2＋ and S2- adsorption-desorption by steel slag were studied in the present study, to reveal whether steel slag was a good sorption material for Fe2＋ and S2- , and to understand whether steel slag had the potentiality in controlling Fe2＋ and S2- and improving the quality of cold waterlogged paddy soil. The sorption of Fe2＋ and S2- by steel slag was studied using batch incubation experiments, while the effects of adsorption time （0.25
ISSN:1008-9209
DOI:10.3785/j.issn.1008-9209.2014.05.131