The removal of DON derived from algae cells by Cu-doped TiO2 under sunlight irradiation
The removal of DON derived from algae cells by Cu-doped TiO2 under sunlight irradiation
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太阳光照射下Cu掺杂TiO2去除藻细胞来源的DON
DOI：
10.1016/j.cej.2015.05.113
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发表时间：
2015-11
影响因子：
15.1
通讯作者：
Cong Li
中科院分区：
文献类型：
--
作者：
Jie Wang;Wei Chen;Changlong Dong;Cong Li
溶解有机氮 (DON) 是致癌含氮消毒剂副产物 (N-DBP) 的已知前体。然而，几乎没有找到从水中去除 DON 的有效方法。本文研究了太阳光/Cu-TiO2和太阳光/TiO2对铜绿微囊藻细胞DON的去除效率和机理。此外，还研究了氧化过程对混凝的影响。结果表明，来自M.的水样中大约有15种主要蛋白质类别。铜绿假单胞菌，其浓度高于 0.066 mg/L。阳光/Cu-TiO2系统7 h后DON去除率为39.2%，比阳光/TiO2系统（29%）高10%。在阳光/Cu-TiO2体系的氧化过程中，可溶性蛋白质和总氮（TN）浓度显着下降，高分子量蛋白质（HMWP）降解为低分子量蛋白质（LMWP）。光催化氧化在前1 h可显着增强混凝对DON的去除效果，随后明显下降。
Dissolved Organic Nitrogen (DON) is a known precursor for carcinogenic nitrogenous disinfectant by-products (N-DBPs). However, few effective methods were found to remove DON from water. In the paper, removal efficiency and mechanism of DON derived fromMicrocystis aeruginosacells by the sunlight/Cu-TiO2and sunlight/TiO2was investigated. In addition, the effect of the oxidation process to the coagulation was also investigated. The results showed that there were about 15 main protein categories in the water samples derived fromM. aeruginosacells, the concentrations of which were higher than 0.066 mg/L. The removal rate of DON in the sunlight/Cu-TiO2system is 39.2% after 7 h, which is 10% higher than that of sunlight/TiO2system (29%). During the oxidation process of sunlight/Cu-TiO2system, soluble protein and the concentration of Total Nitrogen (TN) decreased significantly, and high molecular weight proteins (HMWP) were degraded into low molecular weight proteins (LMWP). The photocatalytic oxidation could significantly enhance the removal effect of DON by coagulation in the first 1 h, following by an obvious decreasing.
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