海水中溶解态蒽和芘的光降解研究
首发时间:2004-02-19
摘要:本文首次用荧光光谱法研究了溶解态多环芳烃(PAHs)蒽(An)和芘(Py)在水、人工海水及天然海水中的光降解过程,考察各种环境因子对溶解态蒽和芘在人工海水中光降解的影响。发现蒽和芘在高压汞灯(Hg)的照射下能进行有效的光降解;在相同的条件下,蒽的光降解速率大于芘的光降解速率;自由基抑制剂(HCO3-)对蒽的光降解影响不大,抑制芘的光降解;光敏剂腐质酸(HA)对蒽和芘的光降解有抑制作用,而丙酮 (Ac)对蒽和芘的光降解有促进作用;硝酸盐(NO3-)和过氧化氢(H2O2)对蒽和芘的光降解有促进作用;重金属离子对蒽和芘的光降解过程的影响较为复杂。
For information in English, please click here
Study on the photolysis of dissolved anthracene and pyrene in seawater
Abstract:n this paper, the photolysis of dissolved anthracene (An) and pyrene (Py) in water, simulated seawater (SSW) and natural seawater (NSW) were studied by fluorimetry. The effects of various environmental factors on the photodecomposition of the dissolved An and Py in SSW were investigated. It was found that under the exposure to high-pressure mercury lamp, both dissolved An and Py are capable of undergoing facile photochemical conversion in SSW and under the same experimental condition the photoreaction rate constants of dissolved An are much larger than those of dissolved Py. It was also found that there is no significant impact of HCO3- on the photolysis of dissolved An while great inhibitive effect occurs on the photolysis of dissolved Py; humic acid (HA) as photosensitizer inhibits the photodegradation of both dissolved An and Py and acetone (Ac) as photosensitizer promotes the photolysis of both dissolved An and Py greatly; the presence of nitrate (NO3-) and hydrogen peroxide (H2O2
Keywords: dissolved An and Py photolysis simulated seawater
基金:
论文图表:
引用
No.3002804107715239****
同行评议
共计0人参与
勘误表
海水中溶解态蒽和芘的光降解研究
评论
全部评论0/1000