摘要
以1mg/L模拟焦化废水为研究对象,采用高锰酸钾氧化-二苯基碳酰二肼分光光度法测定焦化废水中总铬,研究不同条件下粉煤灰对总铬去除率的影响。结果表明:(1)粉煤灰粒径、粉煤灰用量、搅拌时间、pH对总铬去除率都有一定的影响。最佳条件:粉煤灰粒径为150μm,粉煤灰用量为4.00g/L,搅拌时间为40min,pH为3。在最佳条件下,总铬去除率可达98.82%。(2)在粉煤灰处理模拟焦化废水的最佳条件下,粉煤灰处理实际焦化废水的总铬去除率达90.00%。(3)粉煤灰处理焦化废水,可以以废治废,而且处理效果好、处理费用低、原料获取方便,在实践中具有可操作性。
Fly ash was employed for removal of Cr from simulated coking wastewater （1 mg/L） to determine the effect of grain size,fly ash dosage,contacting time and pH on Cr removal efficiency. Chromium content in coking wastewater was spectrophotometric determined with potassium permanganate oxidized diphenylcarbazide. Base on the single factor experiments and orthogonal experiment, the optimum conditions were obtained as follow., grain size was 150μm, fly ash was 4.00 g/L,contacting time was 40 rain and pH was 3. With the optimum conditions,98.82% of Cr in simulated coking wastewater was removed. The optimum conditions also had perfect performance for actual coking wastewater treatment,and the Cr removal rate could reach 90.00%.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2009年第7期13-16,共4页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.50806053)
关键词
粉煤灰
焦化废水
铬
去除
fly ash
coking wastewater
chromium
removal
