粉煤灰免烧陶粒制备及其重金属废水净化性能

摘要: 重金属废水对环境的污染已经引起科研人员的广泛关注。以粉煤灰和水泥为原料、添加活性成分FeS,制备一种免烧陶粒用于含重金属Cu2+、Zn2+、Pb2+的废水处理。探讨了物料配比及蒸养时间对陶粒筒压强度及其比表面积的影响;研究了固液比、接触时间、pH、温度及初始溶液浓度等因素对Cu2+、Zn2+、Pb2+离子净化效果的影响规律,并对实验结果进行了等温线拟合。XRD分析显示,免烧陶粒中存在Ca(OH)2、C—S—H、FeS等矿物相,对重金属离子具有非常好的固定化作用。该免烧陶粒对重金属离子具有很好的去除效果,具备较好的应用前景。

中文摘要:

重金属废水对环境的污染已经引起科研人员的广泛关注。以粉煤灰和水泥为原料、添加活性成分FeS,制备一种免烧陶粒用于含重金属Cu2+、Zn2+、Pb2+的废水处理。探讨了物料配比及蒸养时间对陶粒筒压强度及其比表面积的影响;研究了固液比、接触时间、pH、温度及初始溶液浓度等因素对Cu2+、Zn2+、Pb2+离子净化效果的影响规律,并对实验结果进行了等温线拟合。XRD分析显示,免烧陶粒中存在Ca(OH)2、C—S—H、FeS等矿物相,对重金属离子具有非常好的固定化作用。该免烧陶粒对重金属离子具有很好的去除效果,具备较好的应用前景。

英文摘要:

Environmental pollution from heavy metals contamination has attracted more and more attention from researchers and engineers. A novel non-sintered ceramsite was prepared using coal fly ash and cement as raw materials and FeS as the activating agent to treat the wastewaters contaminated by Cu2+, Zn2+ and Pb2+. The effects of materials ratio and steaming time on the ceramsite intensity and specific surface area were investigated, and the effects of five major factors (solid/liquid ratio, contact time, pH value, temperature and initial concentration) on the removal efficiency of heavy metals (Cu2+, Zn2+ and Pb2+) were examined in detail. The experimental results fitted the adsorption isotherm according to Langmuir and Freundlich models. The XRD analyses demonstrated that new crystal minerals such as Ca(OH)2, C—S—H and FeS emerged in the non-sintered ceramsite, which was helpful to remove the heavy metals. This non-sintered ceramsite presented good performance on the removal of heavy metals and good application prospect can be expected in the future.

声明：转载此文是出于传递更多信息之目的。若有来源标注错误或侵犯了您的合法权益，请作者持权属证明与本网联系，我们将及时更正、删除，谢谢。

  使用微信“扫一扫”功能添加“谷腾环保网”

如果需要了解更加详细的内容，请点击下载 201407151045041166.zip 
        下载该附件请登录，如果还不是本网会员，请先注册