School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China E-mail:
Shandong Taihe Water Treatment Technologies Co., Ltd, Zaozhuang 277102, China.
Water Sci Technol. 2020 Dec;82(11):2525-2535. doi: 10.2166/wst.2020.534.
Solvent Green 7 (HPTS) is a widely used fluorescent dye. As a kind of polycyclic aromatic hydrocarbon (PAHs) derivative, HPTS would cause pollution when it is discharged into the environment. This study adopted advanced oxidation processes (UV/HO) to degrade the HPTS in aqueous solution and investigated the effects of various factors on the degradation. The results showed that: the initial concentration and the fluorescence characteristics of HPTS reduced the degradation efficiency. When the oxidant concentration of HO was 3 mg/L, the degradation efficiency and cost of HPTS (20 mg/L) were the most appropriate; when there were various inorganic anions in the solution, the degradations were not affected, but when the solution was strong acid and there existed a lot of chloride ions, the degradation of HPTS was inhibited. The degradation pathways indicated HPTS degraded into naphthalene derivatives, benzene derivatives through oxidation and decarboxylation reactions, finally into water and carbon dioxide. Further research for substances similar to HPTS structure will make progress in understanding the degradation process of PAHs.
溶剂绿 7（HPTS）是一种广泛使用的荧光染料。作为一种多环芳烃（PAHs）衍生物，HPTS 排放到环境中会造成污染。本研究采用高级氧化工艺（UV/HO）降解水溶液中的 HPTS，并研究了各种因素对降解的影响。结果表明：HPTS 的初始浓度和荧光特性降低了降解效率。当 HO 的氧化剂浓度为 3mg/L 时，HPTS（20mg/L）的降解效率和成本最为适宜；当溶液中存在各种无机阴离子时，降解不受影响，但当溶液呈强酸性且存在大量氯离子时，HPTS 的降解受到抑制。降解途径表明，HPTS 通过氧化和脱羧反应降解为萘衍生物、苯衍生物，最终降解为水和二氧化碳。对类似 HPTS 结构的物质进行进一步研究，将有助于深入了解 PAHs 的降解过程。
