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OALib Journal期刊
ISSN: 2333-9721
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阻垢剂在反渗透处理造纸废水中的应用
DOI: 10.3969/j.issn.1671-7627.2015.04.022, PP. 124-128
Keywords: 阻垢剂,阻垢率,造纸废水,反渗透
Abstract:
以静态实验法评定阻垢剂pc191和mdc150对caco3、caso4、baso4与srso4的阻垢性能。同时采用动态法考察阻垢剂在反渗透(ro)处理造纸废水过程中的阻垢性能。结果表明:阻垢剂质量浓度均为2～6mg/l时,阻垢率(η)的大小顺序为η(caco3)>η(caso4)>η(srso4)>η(baso4);阻垢剂质量浓度大于8mg/l时,2种阻垢剂对caco3、caso4和baso4的阻垢率均能达到90%左右。在反渗透过程中,浓缩5.5h,通量衰减为原通量的65%左右。加入阻垢剂pc191,ca2+、ba2+和sr2+的浓度均大于加入阻垢剂mdc150时的浓度,阻垢剂pc191的配位效果优于mdc150。通过冷场发射扫描电子显微镜(fesem),对加入阻垢剂前后反渗透膜进行表征。结果表明,ro膜面有明显的污染物堆积,阻垢剂的加入明显改变了垢的表面形貌。
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