藻类吸附法去除废水中的重金属

介绍了藻类吸附法处理重金属废水的研究现状,讨论了不同藻类的预处理方法和吸附能力,总结了藻类吸附水中重金属的效果、影响因素、机理和规律,展望了藻类在重金属废水处理中的应用前景。     

Removal of heavy metals (Cr6+,Ni2+)from polluted water using decaying leaves of plane (Plantanus orientalis)

plane decaying leaves have been found capable of removing chromium and nickel ions from aqueous solutions. The removal efficiency depends upon the pH conditions, ions components and concentrations, and concentrations of leaves in media. The maximum removal for unique Cr⁶⁺ is about 7.5-8.0g/kg leaves at pH 4. 0, for unique Ni²⁺ about 2. 6g/kg at the region of PH5. 0-5.5. Under the described conditions nickel increases chromium uptake by plane decaying leaves from solution.     

Impairment of male reproduction in adult rats exposed to hydroxyprogesterone caproate in utero

Hydroxyprogesterone caproate is one of the most effective and widely used drugs for the treatment of uterine bleeding and threatened miscarriage in women. Hydroxyprogesterone caproate was administered to pregnant rats in order to assess the effect of intraperitoneal exposure to supranormal levels of hydroxyprogesterone caproate on the male reproductive potential in the first generation. The cauda epididymal sperm count and motility decreased significantly in rats exposed to hydroxyprogesterone caproate during embryonic development, when compared with control rats. The levels of serum testosterone decreased with an increase in follicle stimulating hormone and luteinizing hormone in adult rats exposed to hydroxyprogesterone caproate during the embryonic stage. It was suggested that the impairment of male reproductive performance could be mediated through the inhibition of testosterone production.     

A new design of groundwater sampling device and its application

Compounds in the atmosphere contaminate samples of groundwater. An inexpensive and simple method for collecting groundwater samples is developed to prevent contamination when the background concentration of contaminants is high. This new design of groundwater sampling device involves a glass sampling bottle with a Teflon-lined valve at each end. A cleaned and dried sampling bottle was connected to a low flow-rate peristaltic pump with Teflon tubing and was filled with water. No headspace volume was remained in the sampling bottle. The sample bottle was then packed in a PVC bag to prevent the target component from infiltrating into the water sample through the valves. In this study, groundwater was sampled at six wells using both the conventional method and the improved method. The analysis of trichlorofluoromethane（ CFC-11 ） concentrations at these six wells indicates that all the groundwater samples obtained by the conventional sampling method were contaminated by CFC-11 from the atmosphere. The improved sampling method greatly eliminated the problems of contamination, preservation and quantitative analysis of natural water.     

浑河（抚顺段）水体中微生物消涨状况及细菌学评价

采用细菌学方法，对浑河（抚顺段）水质进行了细菌学监测，积累了从１９８８年至１９９７年１０年的监测数据，该段水体中微生的消涨状况进行了阐述，并进行了细菌学评价。     

传统增长质疑

传统增长质疑ＣｈａｌｌｅｎｇｉｎｇＴｒａｄｉｔｉｏｎａｌＧｒｏｗｔｈ￥ＴｈｏｒｂｊｏｈｎＢｅｒｎｔｓｅｎＡｂｓｔｒａｃｔ：Ｔｏｄａｙ，ｓａｖｉｎｇｔｈｅｐｌａｎｅｔｉｓａｂｏｕｔｒｅｄｅｆｉｎｉｎｇｏｕｒｄｅｖｅｌｏｐｍｅｎｔｍｏｄｅｌｓ．Ａｓｗｅｋ...     

黄石市可持续发展对策

分析了黄石市可持续发展的有利条件和限制因素,提出了城市可持续发展的对策。     

河南省水环境污染管理与控制对策

在分析了河南省自然环境、水污染状况的基础上，提出了对水环境污染管理与控制的建议，以及需要采取的一系列措施和策略，为政府制定环境规划，治理水污染，进行目标管理提供参考。