羟基游离基杀死压载水中微生物研究

利用介质阻挡强电离放电的方法 ,将空气中的O2 和海水中H2 O电离离解成OH等氧化自由基 ,溶于海水中形成高浓度羟基药剂。羟基致死压载水中入侵的细菌、微藻生物的反应属于游离基反应 ,具有广谱致死特性 ,在压载水外排 (或输入 )过程中就可致死入侵微生物 ,不存在药剂污染海洋环境等问题。实验室研究结果表明 :致死微生物的羟基阈值为0 8mg/L。

高效液相色谱法测定大白鼠脊髓受到前列腺素损伤时羟基游离基的释放

报道了用高效液相色谱法电化学检测器测定羟基游离基的方法。用ＯＤＳ（３μｍ）柱，０．０３ｍｏｌ／Ｌ的醋酸钠和０．０３ｍｏｌ／Ｌ的柠檬酸钾（ｐＨ３．８０）缓冲液为流动相，以水杨酸为捕获剂，微透析采样，测定了前列腺素造成大白鼠脊髓损伤时羟基游离基的释放。

染料废水处理工艺

采用混凝 -化学氧化 -生物处理组合工艺处理还原红 6 B、还原黄棕 G和 2 ,6 -二氨基蒽醌混合染料废水 ,色度、COD、BOD5 去除率分别达到 99.7%、98.8%、97.6 %。

海洋污染及其防治

X55 200400910 羟基游离基杀死压载水中微生物研究/白敏冬…(大连海事大学环境工程研究所)∥海洋与湖沼/ 中国海洋湖沼学会.-2003,34(5).-484-488 环图P-8 利用介质阻挡强电离放电的方法,将空气中的O2和海水中H2O电离离解成OH等氧化自由基,溶于海水中形成高浓度羟基药剂。羟基致死压载水中入侵的细菌。

Sonolytic degradation of 2-chlorobiphenyl

The sonolytic degradation of 2-chlorobiphenyl was investigated. Mass spectroscopy was used to detect the products of sonolytic degradation of 2-chlorobiphenyl. The results show that the products of sonolytic degradation, such as biphenyl, ethyl benzene, diethylbiphenyl, dibutylbiphenyl, phenol, propylphenol and di-tert-butyl phenol are produced by thermolysis and hydroxyl free radical reactions, in which biphenyl counts for almost 40%（mole fraction） of the mother compound and others are at trace level. Rapid accumulation of chloride ion shows quick dechlorination, and 78% organic chlorine is converted into chloride ion. Free radical scavengers, bicarbonate and carbonate, decrease the reaction rate of sonolytic degradation of 2-chlorobiphenyl significantly, and the pseudo 1st order rate constant of sonolytic degradation of 2-chlorobiphenyl decreases linearly with the natural logarithm of the concentration of the added free radical scavenger, showing that the pyrolysis and hydroxyl free radical reaction are the two major pathways for the sonolytic degradation of 2-chlorobiphenyl, in which the hydroxyl radical concentration is estimated to be 1×10-10 （mol/L.）

工厂动态

新开发的活性氧去除用天然成份高砂香料公司采用水或含水有机溶剂从天然植物梭形萍婆中萃取出可作活性氧去除剂的有效物质,去除羟基游离基。