一种杀生剂在海水介质中的降解行为研究

DEGRADATION BEHAVIOR OF BIOCIDE SW303 IN SEAWATER

一种有机硫类杀生剂SW303在海水介质中具有生物降解性、光降解性及水解性。它的完全生物降解与药剂的起始浓度和水样的初始含菌量相关;其光解则因光源而异:由于该化合物的光吸收峰在紫外区,因此在紫外光照射下SW303降解迅速,而在日光下的降解速率则比较缓慢;SW303的水解受温度和pH的影响。总的来说,SW303在海水介质中主要的降解行为为生物降解,其次为光降解,水解对SW303的影响则较为缓慢。

Biocide SW303 prossesses biodegradability, photo-degradability and hydrolysis. Its full biodegradability is correlative with the chemical initial concentration and initial bacterial content in water sample; its photo-degradation depends on light source, As the light adsorption peak of the com- pound is in UV area, under the irradiation of UV light, SW303 degrades quickly, while under the irradiation of sunlight, it degrades slowly; SW303 hy- drolysis is affected by temperature and pH, but its main degradation behavior is biological degradation, then photo-degradation; hydrolysis has little influence on SW303.