以水体中经常暴露的消炎镇痛类药物萘普生(NAP)为研究对象,考察了溶液pH、离子强度(以Ca2+浓度表示)、共存腐殖酸浓度、操作压力和温度对纳滤膜去除NAP效能的影响.试验发现:溶液pH值、离子强度或腐殖酸浓度的增加均提高了纳滤膜对NAP的去除率,操作压力的增加则使NAP的去除率有所降低,当溶液温度在16.5～36.5℃范围内变化时未对NAP的去除率产生明显影响.在所有试验条件下,纳滤膜对NAP的去除率介于83.9％～96.2％之间,说明纳滤膜分离工艺是去除饮用水中微量NAP的一种有效方法,分析认为静电排斥和筛分作用是纳滤膜去除NAP的主要机制.
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