The aim of this study was to evaluate applicability of ion exchange process for organics removal from Douro River surface water at the intake of Lever water treatment plant using magnetized ion exchange resin MIEX®. Qualitative analysis of the natural organic matter present in the surface water and prediction of its amenability to removal in conventional coagulation process were assessed. Results obtained in MIEX®DOC process kinetic batch experiments allowed determination of ion exchange efficiency in dissolved organic carbon (DOC), UV absorbing organics, and true color removal. The data were compared with the efficiencies of the conventional unit processes for organics removal at Lever WTP. MIEX®DOC process revealed to be more efficient in DOC removal than conventional treatment achieving the efficiencies in the range of 61-91 %, lowering disinfection by-products formation potential of the water. DOC removal efficiency at Lever WTP depends largely on the raw water quality and ranges from 28 % for water of moderated quality to 89 % of significantly deteriorated quality. In this work, MIEX®DOC process was also used as a reference method for the determination of contribution of anionic fraction to dissolved organic matter and selectivity of the unit processes at Lever WTP for its removal.

译文

这项研究的目的是评估使用磁化离子交换树脂MIEX在Lever水处理厂进水口从杜罗河地表水中去除有机物的离子交换工艺的适用性®。评估了地表水中存在的天然有机物的定性分析,并预测了其在常规混凝过程中的去除能力。在MIEX中获得的结果®DOC过程动力学批处理实验可以确定溶解有机碳 (DOC) 中的离子交换效率,吸收紫外线的有机物和真正的颜色去除。将数据与常规单元工艺在杠杆WTP去除有机物的效率进行了比较。米克斯®DOC工艺显示在DOC去除方面比常规处理更有效,实现了61-91% 范围内的效率,降低了水的消毒副产物形成潜力。杠杆WTP处的DOC去除效率在很大程度上取决于原水的质量,并且范围从对具有温和质量的水的28% 到具有显著劣化质量的89%。在这项工作中,米克斯®DOC工艺也被用作参考方法,用于确定阴离子级分对溶解有机物的贡献以及Lever WTP去除其单元工艺的选择性。

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