NaOH溶液对有机相苯酚反萃取的研究

本文系统进行了ＮａＯＨ溶液对负载苯酚的ＴＢＰ＋煤油溶剂的反萃取平衡实验。考虑苯酚的支萃取平衡和解离平衡,建立了反萃取的计算模式,并证明了模型的可行性。本文还讨论了ＮａＯＨ溶液浓度,油水相比,萃取平衡分配系数,溶剂中的负载苯酚浓度和ＮａＯＨ溶液中初始酚含量对反萃取率的影响。     

湖南木兰科植物资源的调查研究

本文分析了湖南木兰科分布的自然条件,结合其形态性状讨论了它们的分类学问题、地理分布特点、资源状况以及自然生长状况。文末提出了湖南省木兰科的保护植物名单。     

味精废水中重金属及金属污染对处理利用的影响

本文应用等离子光谱（ＩＣＰ）测试三个厂家味精生产废水中２１种金属元素的水平，其中金属元素的总水平分别达１９１９２ｍｇ．ｌ＾－１，３１９０ｍｇ．ｌ＾－１和３１６１ｍｇ．ｌ＾－１，对照国内外有关的四项水质标准，三厂家味精生产废水中存在着Ｆｅ，Ｚｎ等多种重金属或其他金属元素严重超标现象，味精生产废水对青芋存在急性毒性，２４，４８，７２和９６ｈ的半致死味精废水浓度ＬＣ５０分别为６．９％，３．２％，２．５％     

应用化学清洗剂去除包气带石油污染物的实验研究

本文探讨了应用化学法清除包气带残油的技术，研究分两个方面，（１）分析包气带土壤与第四纪沉积物对石油烃类的吸附特征，（二）在对单种表面活性剂优选的基础上，确定了清洗效率较高的阴离子－非离子表面活性剂的混合配方，通过一次性淋洗和土柱淋洗实验，了解表面活性剂等清洗剂对油类物质的去除效率。     

水杨醛改性壳聚糖对金属离子的吸附性能

研究了以水杨醛改性的壳聚糖及其衍生物对Ｐｂ＾２＋、Ｚｎ＾２＋，Ｃｏ＾２＋的静态吸附性能，结果表明，该类吸附剂对Ｐｂ＾２＋，Ｚｎ＾２＋具有良了的吸附性能，其吸附量可分别达４５５．２和１０５．５ｍｇ·ｇ＾－１，并能在Ｃｏ＾２＋存在下选择吸附Ｐｂ＾２＋，Ｚｎ＾２＋。     

单甲脒动物代谢的研究

采用气相色谱／傅立叶红外光谱和气相色谱／质谱仪分析大鼠肝脏中单甲脒的代谢产物，证明大鼠经口摄入单甲脒后，在肝脏中迅速代谢，其代谢中间产物为２，４－二甲基苯胺和含酰胺基的化全物。     

杨树排放碳氢化合物的相关因素

采用封闭式气袋采样和气相色谱法，对杨树排放碳氢化合物（ＨＣｓ）的情况进行了调查，结果发现，与油松排放情况不同，杨树主要排放异戊二烯，约占其ＨＣｓ排放总量的９５％以上，且与温度，光强正相关，排放的日变化表明，杨树在正午有一排放高峰，夜间基本不排放，在春季和夏季日均气温分别为１９．２℃和２８．８℃，杨树的异戊二烯平均总排放速率分别为４．４和３９．８μｇ／ｇ．ｈ。     

Relationship between sludge settleability and membrane fouling in a membrane bioreactor

The evolution of activated sludge settleability and its relationship to membrane fouling in a submerged membrane bioreactor were studied at a lab-scale equipment fed with synthetic wastewater. It was found that sludge volume index (SVI) gradually increased and the sludge settleability was reduced, which was caused by the propagation of filamentous bacteria. With increasing SVI, the average increasing rate of trans-membrane pressure increased, the stable filtration period was shortened, and the two stages (smooth stage and accelerating stage) of the trans-membrane pressure were more obvious. At the same time, the increasing rate of trans-membrane pressure at the smooth stage decreased and the rate at the accelerating stage increased with SVI, respectively. The observation by using scanning electronic microscopes showed the cake layer with loose structure and large thickness formed on the membrane surface due to the appearance of filamentous bacteria and high SVI in sludge. Influence of the sludge settleability on the trans-membrane pressure was related to the structure and thickness of the cake layer on the membrane.