复配介质去除地下水中腐殖酸  

Removal of humic acid in groundwater by mixed media

作　　者：秦晓鹏[1] 刘菲[1] 黄国鑫[1] 辛晓华[1] 

机构地区：[1]中国地质大学(北京)水资源与环境工程北京市重点实验室,北京100083

出　　处：《环境工程学报》2010年第6期1213-1218,共6页Chinese Journal of Environmental Engineering

基　　金：国家水体污染控制与治理重大专项(2008ZX07424-002-02);国家自然科学基金资助项目(40572146);中国地质调查局项目地下水有机污染测试技术研究(1212010634607)

摘　　要：以模拟地下水为研究对象,进行了复配介质去除地下水中腐殖酸的实验研究。探讨了配比、粒径、固液比、pH和温度对腐殖酸去除效果的影响。腐殖酸的浓度通过紫外分光光度法测定。结果表明:在不加活性炭的条件下,H物质∶X物质∶Q物质=1∶8∶8时,其硬度较好;在初始pH=6.34、反应时间为4 h时,去除率可达到95%以上;当反应时间≤1 h时,去除率随粒径增大而减小,而当反应时间为2～6 h时,小粒径和中等粒径复配介质对腐殖酸去除率略高于大粒径;一定浓度范围内,腐殖酸的去除率与固液比呈正相关,但固液比增大时,并不能无限提高去除率,当固液比为1∶200～1∶50时,去除率呈现平台;pH对复配介质去除效果影响不大,而温度对腐殖酸的去除有显著影响,较低温度(16.8℃)下的去除率比较高温度(35.0℃)下的去除率高5%。该复配介质去除地下水中腐殖酸是有效可行的,可作为PRB(permeable reactive barrier,渗透反应格栅)的潜在反应介质。Experimental batch study was conducted to remove humic acid（HA） from simulated groundwater using mixed media.The effects of ingredient,particle size,solid-liquid ratio,pH and temperature on HA removal efficiency were discussed.The concentration of HA was analyzed by UV-spectrometer.The results indicated that the efficiency of HA removal was above 95% at reaction time of 4 hours and initial pH of 6.34.When the reaction time was 1 hour,the removal efficiency increased with particle size decreasing.Both small and medium particle sizes performed better than the large one with regard to the removal when the reaction time varied from 2 to 6 hours.The efficiency had a positive correlation with solid-to-liquid ratio,but the removal efficiency could not limitlessly increase with solid-to-liquid ratio.When it changed between 1∶200 and 1∶50,the removal efficiency reached a plateau phase.Though pH had little effect on the removal efficiency,temperature had a significant effect on HA removal.The removal efficiency at 16.8℃ was lower about 5% than that at 35.0℃.It is effective and feasible to remove HA from groundwater by the mixed media,and the media can be applied for PRB（permeable reactive barrier）as a kind of potential reactive medium.

关 键 词：复配介质 腐殖酸 地下水 PRB 

分 类 号：X523[环境科学与工程—环境工程]