摘要
以 Ti O2 做催化剂 ,用光催化氧化法处理碱法草浆纸厂废水。讨论了 p H值、H2 O2 的用量、催化剂用量、光照时间等因素对 CODCr去除率的影响 ,优选了反应条件。结果表明 :在 p H=6.0 8,Ti O2 用量为 0 .0 3 g,光照时间 3 h,H2 O2 量 (体积分数 )为 0 .60 %的条件下 ,废水的 CODCr去除率可达 96%以上。处理后废水达到排放标准。
This paper aims to introduce the author's developed new method on treating straw pulp papermaking wastewater by means of photo-catalyzed oxidation TiO_2as the catalyst. The mechanism mainly involves a reaction between hydroxyl free radicals generated in the photo-catalyzed oxidation process and pollutants in the wastewater with the latter being degraded. Our experiments prove that the presence of a small amount of H_2O_2 can increase the disposal effect significantly. To prove the influence of such experimental parameters as pH value, the amounts of H_2O_2 and catalyst, the author has done careful studies on the COD_(Cr) removing rate together with the optimum reaction parameters, such as the initial pH value as 6.08, the amount of TiO_2as 0.03 g and H_2O_2concentration at 0.60% (V/V). The result is that it is necessary to irradiate the wastewater for 3 hours under a 300 W mercury light under the above said conditions to reach a COD_(Cr) removal rate of 96%. And consequently, the wastewater treated will be able to meet the environment-protection standard when released.
出处
《安全与环境学报》
CAS
CSCD
2005年第1期20-22,共3页
Journal of Safety and Environment
基金
徐州师范大学重点科研项目 (0 2 AXW0 0 8)
关键词
环境工程
光催化氧化
造纸废水
TiO2
深度处理
environmental engineering
photo-catalyzed oxidation
papermaking wastewater
TiO_2
in-depth treatment