环境空气中对氯甲苯的监测分析方法研究

本文采用活性炭管采样，毛细管气相色谱法测定环境空气中的对氯甲苯，方法的最低检出限为0．10mg／m^3，方法的灵敏度高，重复性好，本法能够作为环境空气中对氯甲苯的测定方法。     

电位滴定法连续测定废水中溴和氯

采用电位滴定法连续测定废水中溴和氯,以216型银电极为指示电级,217型饱和甘汞电极为参比电极。测定结果的相对标准偏差溴为065%,氯为054%。测定误差溴为-025%,氯为028%。此法可用于溴和氯的连续测定。     

饮水中三卤甲烷形成机理与处理技术现状

综述了水中腐酸氯化产物及其形成三卤甲烷的反应历程及各种环境条件如ｐＨ值，光照及自由基对ＴＨＭｓ形成的影响，并提出控制和去除饮水ＴＨＭｓ的方法。     

应用XAD—7树脂富集水中痕量邻氯酚和对氯酚

采用ＸＡＤ－７树脂吸附富集自来和地面水中良量氯酚和对氯酚。后用氢焰气相色谱法测定。在溶液的ｐＨ小于６，流为１０毫升／分以内，平均吸附效率达９４％和９２％。甲醇、丙酮和（１＋１）丙酮＋乙醚混和液均有９６％以上的淋洗效率。     

Effect of herbicide acetochlor on cytochrome P450 monooxygenases and GST of earthworms Eisenia fetida

To assess the sublethal toxicity of the herbicide acetochlor to earthworms and to find out biomarkers possible inducted under acetochlor exposure, Eiseniafetida was exposed to artificial soils supplemented with different concentrations of acetochlor（5, 10, 20, 40 and 80 mg/kg soil）. Effects of the acetochlor on cytochrome P450 monooxygenases p-nitroanisole O-demethylase（ODM）, aldrin epoxidase（AE） and glutathione-S-transferases （GSTs） activities were determined. The results revealed cytochrome P450 monooxygenases were elevated with increasing concentrations of acetochlor, and the AE activity increased significantly compared with control at the concentration of 80 mg/kg （P〈0.05）. However, ODM activity from E. fetida was not induced significantly by acetochlor at all treatments（P〉0.05）. Sodium dodecyl sulfate-polyacryamide gel electrophoresis（SDS-PAGE） showed that one protein band was visualized and no evident differences were found in protein profiles between treatments and control. The GST activity increased significantly with longer duration（P〈0.05） and increasing concentrations of acetochlor exposure（P〈0.05）. This study showed that the monooxygenases and GSTs activities in E. fetida could be induced by acetochlor, and thus, the AE and GST could be used in sublethal assays for soil contamination surveys and GST could be used as biomarkers of acetochlor exposure in E. fetida.     

水解酸化/接触氧化工艺处理戒毒所污水

介绍采用水解酸化—生物接触氧化—消毒工艺处理戒毒所污水工程的设计和运行情况。实践表明,出水效果持续稳定,各项污染物均达到了《污水综合排放标准》(GB8978-96)的一级标准,自动化程度高,操作管理简便,出水可用于园林绿化。     

Population differences in susceptibility to stress in Littorina saxatilis from metal contaminated and uncontaminated sites in the Isle of Man

Introduction Pollution-induced stress indices at various levels of organization, from sub-cellular to organism al level, have been investigated as a m eans of identifying and m onitoring environm ental contam ination. Since changes elicited by toxic m aterials m ust occur at the biochem ical, cellular and tissue levels of organization before effects w ould be observed at the organism al level, such m easures have been suggested as potential short-term , functional indices w hich can be used to…     

氯脂肪烃分子结构与对鼠急性毒性关系的专家系统研究

应用专家系统方法对１１０种氯脂肪烃和可能的对应烷烃的分子结构及对鼠急性毒性关系进行了研究。分子结构描述符取为：特殊构象结构，母体烃结构，取代氯原子数和分子含碳原子数。结果表明：对于四类活性正确分类率达到８２％以上，满足统计预报要求。