Olmez-Hanci Tugba, Arslan-Alaton Idil, Gelegen Ozlem
Istanbul Technical University, Faculty of Civil Engineering, Department of Environmental Engineering, 34469 Maslak, Istanbul, Turkey E-mail:
Water Sci Technol. 2014;70(6):1056-64. doi: 10.2166/wst.2014.330.
Photo-Fenton-like treatment of the commercially important naphthalene sulphonate K-acid (2-naphthylamine-3,6,8-trisulphonic acid) was investigated using UV-C, UV-A and visible light irradiation. Changes in toxicity patterns were followed by the Vibrio fischeri bioassay. Rapid and complete degradation of K-acid accompanied with nearly complete oxidation and mineralization rates (>90%) were achieved for all studied irradiation types. On the other hand, detoxification was rather limited and did not change significantly during photo-Fenton-like treatment. Several oxidation products could be identified via liquid chromatograph-mass spectrometer analyses, such as desulphonated and hydroxylated naphthalene derivatives, quinones, and ring-opening as well as dimerization products. Photo-Fenton-like treatment of K-acid with UV-C, UV-A and visible light irradiation occurred through a series of hydroxylation and desulphonation reactions, followed by ring cleavage. A common degradation pathway for photo-Fenton-like treatment of K-acid using different irradiation types was proposed.
采用紫外线C、紫外线A和可见光照射，研究了对商业上重要的萘磺酸盐K酸（2-萘胺-3,6,8-三磺酸）进行类光芬顿处理。通过费氏弧菌生物测定法跟踪毒性模式的变化。对于所有研究的照射类型，K酸都实现了快速且完全的降解，同时伴随着近乎完全的氧化和矿化率（>90%）。另一方面，解毒作用相当有限，并且在类光芬顿处理过程中没有显著变化。通过液相色谱-质谱仪分析可以鉴定出几种氧化产物，如脱磺化和羟基化的萘衍生物、醌类以及开环和二聚产物。用紫外线C、紫外线A和可见光照射对K酸进行类光芬顿处理是通过一系列羟基化和脱磺化反应，随后发生环裂解。提出了使用不同照射类型对K酸进行类光芬顿处理的常见降解途径。
