江蓠生长对甲壳素废水的净化作用

探索小型水泥池中甲壳素废水对江蓠生长的影响以及江蓠生长对甲壳素废水的净化作用，在1m^3水泥池中放养100g长度为5cm的江蓠，充气并加入不同比例的甲壳素废水，平行2组；加入同一比例甲壳素废水，以不同温度进行处理，平行1组。结果表明：在10：1的甲壳素废水中，江蓠生长的适宜温度为26℃左右；甲壳素废水的浓度影响江蓠的生长率，第10d时，添加10：2的浓度有效高的生长率；江蓠在浓度为10：10废水的生长过程中，第3d对CODCr、BOD5去除率最佳，分别为65．8％、52．1％。通过江蓠生长与自然条件下的废水净化效果的比较，江蓠的正常生长能使甲壳素废水达到排放标准。     

金沙江水系稀土元素环境背景值和地球化学特征

采用化学分离富集－等离子发射光谱法测定籽金沙水系江水和沉积物中１５个稀土元素（Ｌａ，Ｃｅ，Ｐｒ，Ｎｄ，Ｓｍ，Ｅｕ，Ｇｄ，Ｔｂ，Ｄｙ，Ｅｒ，Ｔｍ，Ｙｂ，Ｉｕ，Ｓｃ和Ｙ）的含量，提供了金沙江水系江水和沉积物稀土元素环境背景值，结果表明，金沙江水系稀土元素分布模式呈负斜率，肴呈负异常，水系沉积物∑Ｃｅ／∑Ｙ比值在２．５２－４．１８之间，Ｅｕ／∑ＲＥＥ比值在０．５６－０．９４之间，说明金沙江水系沉积物属贫     

粉煤灰中的微珠特征及形成机理探讨

本文利用现代分析测试技术，对华能南京电厂粉煤灰中的玻璃微珠的一些物理性质和微结构特征，如形貌、粒径分布、颗粒类型、矿物相种类和含量、漂珠的丰度、微珠的密度和壳壁厚度以及热稳定性等，进行了详细研究，并对空心微珠的成因机制进行了讨论。     

放射性污染防治对策与建议

根据2001年浙江省放射性申报登记试点城市－－嘉兴市的申报登记结果，在分析该市的放射性污染控制现状和管理现状的基础上，结合该市的实际情况，对放射性污染管理防治工作中存在的问题和薄弱环节，有针对性地提出嘉兴市放射性污染防治对策与建议，供有关部门参考。     

湘江谷地土壤中微量元素铀和钍的含量及分布特征

本研究利用仪器中子活化法对湘江谷地土壤中的天然放射性元素铀和钍进行了测定。文中报道了该地区不同土类和母质土壤及全区土壤中铀和钍的含量及其分布特征。在该区6种主要类型土壤中,铀和钍的含量分布规律基本相同,即山地草甸土>山地黄棕壤>水稻土>红壤>黄壤>紫色土。全区土壤中铀和钍的平均含量分别为4.20ppm和17.0ppm。该值均高于世界土壤中铀和钍的平均含量(2ppm和9ppm)及地壳平均丰度(2.7ppm和9.6ppm),同时也高于我国其它地区。文中还对该区土壤中铀和钍的比值(Th/U)进行了讨论。     

黄磷废水处理工艺比较

针对黄磷废水的两种处理工艺做了详细的分析和比较 ,结果表明 ,对不同规模的黄磷生产厂 ,可采用不同的处理工艺 ,但最好是采用主动式黄磷废水处理工艺。主动式黄磷废水处理工艺能使黄磷废水经处理后达到GB8978 1996规定的国家一级排放标准。     

厌氧颗粒污泥降解五氯酚活性的研究

在分批培养条件下，对取自处理含氯酚有机废水厌氧反应器的颗粒污泥降解五氯酚（ＰＣＰ）的活性作了初步研究．结果发现，反应器下层污泥降解ＰＣＰ活性较高，污泥浓度影响比ＰＣＰ降解速率；表观ＰＣＰ降解过程可用一级反应动力学表征，外加碳源特别是丁酸、葡萄糖对ＰＣＰ厌氧降解有明显的强化作用；外加碳源与ＰＣＰ浓度均影响ＰＣＰ的降解速率．     

Effects of selected pesticides on , and on seed germination and Verticillium wilt pathogens of alfalfa

Studies on the effects of 21 fungicides and five pyrethroid insecticides on growth of , emergence and survival of alfalfa seed and the efficacy of the chemicals in control of Verticillium wilt pathogens were conducted.     

Persistent organochlorine residues in human breast milk from Hanoi and Hochiminh City, Vietnam: contamination, accumulation kinetics and risk assessment for infants

Despite the ban on persistent organochlorines (OCs) in most of the developed nations, their usage continued until recently in many Asian developing countries including Vietnam, for agricultural purposes and vector-borne disease eradication programs. In this study, we collected human breast milk samples from the two big cities in Vietnam: Hanoi (n=42) and Hochiminh (n=44) and determined the concentrations of persistent OCs such as PCBs, DDT and its metabolites (DDTs), hexachlorocyclohexanes (HCHs), hexachlorobenzene (HCB), chlordane compounds (CHLs) and tris-4-chlorophenyl-methane (TCPMe). The contamination pattern of OCs was in the order of DDTs > PCBs > HCHs > CHLs approximately HCB approximately TCPMe. Compilation of available data indicated that DDT residue levels in human breast milk from Vietnam were among the highest values reported for Asian developing countries as well as developed nations. This result suggests recent usage of DDTs in both north and south Vietnam. Interestingly, in both cities, the p,p'-DDT portion was higher in multiparas than those in primiparas. Considering the fact that the interval between the first and the second child of a mother in Vietnam is usually short, this result probably indicates continuous intake of DDTs in the population. Analysis of infant exposure to DDTs via breast milk suggested that the daily intake rates for number of individuals are close to or above the threshold for adverse effects which may raise concern on children health.