Department of Environmental Engineering, Ondokuz Mayis University, 55139 Samsun, Turkey.
J Hazard Mater. 2010 Jan 15;173(1-3):468-73. doi: 10.1016/j.jhazmat.2009.08.108. Epub 2009 Aug 31.
Increasing amounts of residues and waste materials coming from industrial activities in different processes have become an increasingly urgent problem for the future. The release of large quantities of heavy metals into the environment has resulted in a number of environmental problems. The present study investigated the safe disposal of the zinc leach residue waste using industrial residues such as fly ash, phosphogypsum and red mud. In the study, leachability of heavy metals from the zinc leach residue has been evaluated by mine water leaching procedure (MWLP) and toxicity characteristic leaching procedure (TCLP). Zinc removal from leachate was studied using fly ash, phosphogypsum and red mud. The adsorption capacities and adsorption efficiencies were determined. The adsorption rate data was analyzed according to the pseudo-second-order kinetic, Elovich kinetic and intra-particle diffusion kinetic models. The pseudo-second-order kinetic was the best fit kinetic model for the experimental data. The results show that addition of fly ash, phosphogypsum and red mud to the zinc leach residue drastically reduces the heavy metal content in the leachate and could be used as liner materials.
随着工业活动在不同过程中产生的残留物和废料数量不断增加，这已成为未来一个日益紧迫的问题。大量重金属排放到环境中，导致了许多环境问题。本研究探讨了使用粉煤灰、磷石膏和赤泥等工业废料安全处理锌浸出残渣废物。在研究中，通过矿山水浸出程序（MWLP）和毒性特征浸出程序（TCLP）评估了重金属从锌浸出残渣中的浸出性。研究了用粉煤灰、磷石膏和赤泥从浸出液中去除锌。测定了吸附容量和吸附效率。根据拟二级动力学、Elovich 动力学和内扩散动力学模型对吸附速率数据进行了分析。拟二级动力学是实验数据的最佳拟合动力学模型。结果表明，向锌浸出残渣中添加粉煤灰、磷石膏和赤泥可大大降低浸出液中的重金属含量，可作为衬垫材料。
