摘要
采用纳滤对含Cr(Ⅵ)废水进行试验研究,讨论了初始浓度、pH、浓差极化、共存离子对处理效果的影响。试验结果表明,NF90膜对含Cr(Ⅵ)废水有良好的处理效果,去除率超过了98%,出水Cr(Ⅵ)浓度低于0.5mg/L,可以达标排放或回用于镀件漂洗。
The experiments on hexavalent chromium wastewater were conducted. The effects of the initial chromium concentration, pressure, pH, concentration polarization and coexisting ions (Na 2SO 4 and NaCl) on the performance of nanofiltration membranes were investigated. The experimental results showed that the removal efficiency of hexavalent chromium was higher than 98% and its concentrations in permeation liquid were lower than 0 5 mg/L, meeting the Discharge Standard (GB8978 1996) or using as water for washing electroplated products, which verified that nanofiltration is an effective method for the removal of hexavalent chromium.
出处
《环境污染治理技术与设备》
CAS
CSCD
北大核心
2005年第3期25-27,共3页
Techniques and Equipment for Environmental Pollution Control
基金
江苏省科技厅高新技术项目(BG2001028)
江苏高校自然科学研究项目(2004112TSJB141)
关键词
废水
Cr(Ⅵ)
纳滤
达标排放
处理效果
去除率
回用
镀件
浓差极化
漂洗
membrane separation
nanofiltration
hexavalent chromium
wastewater
rejection rate
concentration polarization
