Department of Chemical Engineering, Changzhou Institute of Technology, Changzhou 213022, China.
J Environ Sci (China). 2012;24(5):846-51. doi: 10.1016/s1001-0742(11)60809-7.
The photodegradation of bisphenol S (BPS) in aqueous solutions was studied under different conditions. Photolysis and kinetics were investigated, as were the photolysis mechanism and the influences of initial pH value, light source, and environmental substances in water. The results showed that the photolysis of BPS occurred under UV light, and the rate increased with light source intensity. The photolysis of 5.0-50.0 mg/L BPS in water followed first-order kinetics: the rate was gamma = 0.0161C(BPS) under a 40-W UV-lamp, and the degradation half-life was 43.1 min. Due to its absorption of light, direct photolysis of BPS was a predominant pathway for BPS but was not obviously affected by reactive oxygen species. The results confirmed that the photolysis rates of BPS in alkaline water solution were faster than those in acidic and neutral water solution because of the ionization of BPS. The photodegradation rate of BPS increased in the presence of chloride and ferric ions, while the rate was inhibited by nitrate and phosphate in aqueous solution.
水溶液中双酚 S（BPS）的光降解研究在不同条件下进行。研究了光解和动力学，以及光解机制以及初始 pH 值、光源和水中环境物质的影响。结果表明，BPS 在紫外光下发生光解，光解速率随光源强度的增加而增加。在水中，5.0-50.0mg/L BPS 的光解符合一级动力学：在 40W 紫外灯下，γ=0.0161C（BPS），降解半衰期为 43.1 分钟。由于对光的吸收，BPS 的直接光解是 BPS 的主要途径，但不受活性氧的明显影响。结果证实，由于 BPS 的电离，BPS 在碱性水溶液中的光解速率比在酸性和中性水溶液中的光解速率快。在氯和铁离子存在下，BPS 的光降解速率增加，而在水溶液中，硝酸盐和磷酸盐的存在则抑制了 BPS 的光降解速率。
