CAJ | 학술논문

采用聚乙烯亚胺（PEI）络合超滤脱除稀土永磁材料生产废水中的六价铬，研究了pH值、聚合物/金属离子装载比（P/M）、操作压差（△P）、运行时间和温度等因素对稀土永磁材料生产废水中六价铬截留率和膜通量的影响。结果表明：在一定的操作压力下，控制络合pH=7，P/M=7时，六价铬截留率可达86%以上。膜通量随着操作压差的增加而增高，六价铬截留率随操作压差的变化不大；超滤装置运行20 min后，膜通量和六价铬截留率达到稳定；在15～40℃的温度范围内，膜通量和六价铬截留率有明显的变化。
채용취을희아알（PEI）락합초려탈제희토영자재료생산폐수중적륙개락，연구료pH치、취합물/금속리자장재비（P/M）、조작압차（△P）、운행시간화온도등인소대희토영자재료생산폐수중륙개락절류솔화막통량적영향。결과표명：재일정적조작압력하，공제락합pH=7，P/M=7시，륙개락절류솔가체86%이상。막통량수착조작압차적증가이증고，륙개락절류솔수조작압차적변화불대；초려장치운행20 min후，막통량화륙개락절류솔체도은정；재15～40℃적온도범위내，막통량화륙개락절류솔유명현적변화。
The experiment, using PEI as complexing agents to remove the six chromium from wastewater by rare earth permanent magnetic materials, investigated the effects of pH value, the polymer / metal ion loading ratio (P/M), operation pressure difference (△P), factors that affect the running time and temperature on the retention rate of hexavalent chromium and membrane flux. The results showed that under △P of a constant, pH=7 and P/M=7, the retention rate of hexavalent chromium can reach more than 86 %. Membrane flux increased with the increase of operating pressure, while the retention rate of hexavalent chromium did not change much;the membrane flux and the retention rate of hexavalent chromium remained unchanged when ultrafiltration device was running after 20 min; the membrane flux and the retention rate of hexavalent chromium changed significantly in the temperature range of 15 ℃to 40℃.