纳米MgO对废水COD去除效果的研究  

Preliminary experimental study on removal efficiency of COD by nanocrystalline magnesia

作　　者：林玲玲[1] 王风[1] 张克强[1] 李军幸[1] 杜连柱[1] 

机构地区：[1]农业部环境保护科研监测所,天津300191

出　　处：《工业水处理》2011年第6期28-31,共4页Industrial Water Treatment

基　　金：农业部948项目(2009-Z44);水体污染控制与治理科技重大专项(2008ZX07425-004-03);中央级公益性科研院所基本科研业务费专项(2008-ljx-6)

摘　　要：以模拟废水为研究对象,评价纳米MgO对COD的去除效果。研究了常温下光源类型(避光、自然光、紫外光)、MgO投加量及光照时间等因素对废水COD去除效果的影响。结果表明:在模拟废水COD为140 mg/L条件下,紫外光的作用明显优于避光和自然光条件;随着纳米MgO投加量的增加,COD去除率升高,在紫外光照射3.5 h,纳米MgO投加量为20 g/L时,COD去除率可达73%。在此最佳工艺条件下,养殖废水的COD去除率可达68.15%,达到农业灌溉标准。Simulated wastewater has been applied to the evaluation of COD removal efficiency by using nano-MgO.The effects of different types of light sources（light-tight,sunlight,ultraviolet） at normal temperature,nano-MgO dosage and light application time on the wastewater COD removal efficiency are studied.The results show that when the COD of simulated wastewater is 140 mg/L,the COD removal rate under UV light is better than that under light-tight or sunlight conditions.The COD removal rate increases with the increase of nano-MgO dosage.When the UV application time is 3.5 h,on 20 g/L nano-MgO,the COD removal rate can reach 73%.Under the optimum conditions,the COD removal rate of livestock wastewater reaches 68.15%.It reaches the mark of irrigation water quality.

关 键 词：纳米氧化镁 COD去除率 紫外光 养殖废水 

分 类 号：X703[环境科学与工程—环境工程]