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粉煤灰免烧陶粒制备及其重金属废水净化性能
引用本文:邹正禹,刘阳生.粉煤灰免烧陶粒制备及其重金属废水净化性能[J].环境污染治理技术与设备,2013(10):4054-4060.
作者姓名:邹正禹  刘阳生
作者单位:北京大学环境科学与工程学院,北京市固体废物管理与资源化重点实验室,北京100871
基金项目:国家自然科学基金资助项目(21077002)
摘    要: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—D—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。

关 键 词:粉煤灰  水泥  免烧陶粒  重金属  吸附等温线

Preparation of non-sintered ceramsite from coal fly ash and its performance on heavy metals removal
Zou Zhengyu,Liu Yangsheng.Preparation of non-sintered ceramsite from coal fly ash and its performance on heavy metals removal[J].Techniques and Equipment for Environmental Pollution Control,2013(10):4054-4060.
Authors:Zou Zhengyu  Liu Yangsheng
Institution:(Beijing Key Laboratory of Solid Waste Management and Utilization, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China)
Abstract: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 investi- gated, 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 ana- lyses 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 perform- ance on the removal of heavy metals and good application prospect can be expected in the future.
Keywords:coal fly ash  cement  non-sintered ceramsite  heavy metals  adsorption isotherm
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