摘要
以铝盐、作物秸秆为主要原料,用氢氧化钠、氯乙酸通过碱化和醚化对秸秆进行改性,在一定条件下与铝盐合成了一种新型的无机-天然有机复合絮凝剂（定名为SPA）,研究了其对高岭土模拟废水的吸光度和浊度去除性能,并对几个主要影响因素作了考察。结果表明：SPA对该模拟废水有较好的处理效果,5 mL SPA/1 L高岭土悬液的投量就可以获得吸光度和浊度88%以上的去除率,室温即可达到最佳处理效果,且pH值适应范围广,大约为3-9。还进行了SPA和铝盐对市政污水的处理效果的对比分析,试验结果表明：对其出水的吸光度去除率、浊度去除率和SS去除率来说,SPA都比铝盐的处理效果好;SPA对COD的去除效果比铝盐略差,但是在低投量时其COD去除率为65%,可以满足污水初级处理的要求。
An innovative combined flocculant （denominated as SPA） was prepared using straw, aluminium salts as primary materials. The straw was modified by sodium hydroxide and chloroactic acid. A simulated wastewater containing kaolin was tentatively treated by SPA. The results of the experiment indicated that SPA was an effective coagulant with the removal rate of 88% above on turbidness and absorbency by dose of 5 mL/L. The optimal temperature was room temperature, and the pH range was 3 -9. When compared the treating efficiency of municipal wastewater using SPA with using aluminium salts, the results showed that SPA was better than aluminium salts on the removal of suspended solids, turbidness and absorbency. Though SPA was not as effective as aluminium salts on reduction in the chemical oxygen demand （COD） ,the reduction in the COD was 65% for raw water treatment, it also could be considered as an effective flocculant.
出处
《环境工程学报》
CAS
CSCD
北大核心
2008年第10期1317-1321,共5页
Chinese Journal of Environmental Engineering
基金
高等学校科技创新工程重大项目培育资金项目(707011)
国家自然科学基金面上项目(20777040)
关键词
改性秸秆
铝盐
复合絮凝剂
模拟废水
市政污水
modified straw
aluminium salt
combined flocculant
simulated wastewater
municipal wastewater
