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Photocatalytic Treatment of Linear Alkylbenzene Sulfonate (LAS) in Water

机译:水中线性烷基苯磺酸盐(LAS)的光催化处理

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摘要

The photocatalytic degradation of aqueous linear alkylbenzene sulfonate (LAS) was studied. Two different photocatalysts, Degussa P25 TiO_2 and Hombikat UV 100 TiO_2, were used to degrade aqueous linear alkylbenzene sulfonate in slurry batch photore-actors. For a 100 mg/L LAS solution based on first-order rate constants, the optimum photocatalyst loading for Degussa P25 TiO_2 was 4.0 g/L, while for Hombikat UV 100 TiO_2 it was 2.0 g/L. The photoactivity of Degussa P25 TiO_2 it was higher than that of Hombikat UV 100 TiO_2 for the treatment of LAS. A mixture of both photocatalysts did not improve the LAS degradation rates in batch experiments. Combination of Degussa P25 TiO_2 and 600 mg/L H_2O_2 along with irradiation with UV light at either 254 or 365 nm did not improve the LAS degradation rates over the photocatalytic or photolytic processes individually.
机译:研究了线性烷基苯磺酸盐(LAS)的光催化降解。两种不同的光催化剂Degussa P25 TiO_2和Hombikat UV 100 TiO_2被用于降解浆料批处理光反应器中的线性烷基苯磺酸盐水溶液。对于基于一级速率常数的100 mg / L LAS溶液,Degussa P25 TiO_2的最佳光催化剂载量为4.0 g / L,而Hombikat UV 100 TiO_2的最佳光催化剂载量为2.0 g / L。 Degussa P25 TiO_2的光活性高于Hombikat UV 100 TiO_2。在分批实验中,两种光催化剂的混合物均不能提高LAS的降解率。 Degussa P25 TiO_2和600 mg / L H_2O_2的组合以及在254或365 nm处用紫外线照射不会单独提高光催化或光解过程中的LAS降解速率。

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