过程模拟法在清洁生产研究中的应用

以醋酸清洁生产为例，介绍了过程模拟法在清洁生产研究中的应用。利用现代过程模拟技术，可在较小人力、物力投入的前提下，获得更多的系统信息，有利于清洁生产工艺的确定及操作参数的优化。     

Complex behaviour of trivalent rare earth elements by humic acids

ＣｏｍｐｌｅｘｂｅｈａｖｉｏｕｒｏｆｔｒｉｖａｌｅｎｔｒａｒｅｅａｒｔｈｅｌｅｍｅｎｔｓｂｙｈｕｍｉｃａｃｉｄｓＧｅｎｇＡｎｃｈａｏＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅｏｆＥｎｖｉｒｏｎｍｅｎｔａｌＥｎｇｉｎｅｅｒｉｎｇ，ＦｕｓｈｕｎＰｅｔｒｏｌｅ...     

Effects of low pH on zooplankton in some suburban waterbodies of Chongqing City

ＥｆｆｅｃｔｓｏｆｌｏｗｐＨｏｎｚｏｏｐｌａｎｋｔｏｎｉｎｓｏｍｅｓｕｂｕｒｂａｎｗａｔｅｒｂｏｄｉｅｓｏｆＣｈｏｎｇｑｉｎｇＣｉｔｙＺｈｕａｎｇＤｅｈｕｉ（ＩｎｓｔｉｔｕｔｅｏｆＨｙｄｒｏｂｉｏｌｏｇｙ，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃ...     

Vitamins,folic acid and neural tube defects: Comments on investigations in the United States

No clear answer concerning whether multivitamin/folate supplementation prevents neural tube defects (NTDs) is provided by three studies in the United States. All these studies are occurrence in nature, no recurrence studies having been conducted. The Atlanta Birth Defects Study is subject to pronounced memory and recall biases, the length between event and interview being as long as 16 years. In a second study (Boston University), objections can be raised to certain aspects of the experimental design, and the claim that 22 per cent of women started vitamins sufficiently early after pregnancy diagnosis to influence NTD formation is suspicious. Our NICHD case control study of 541 women in California and Illinois revealed no evidence for multivitamins or folic acid preventing NTDs. U.S. public policy-makers face difficulties in applying results of recurrence or occurrence studies in high-risk areas to low-risk areas in the U.S.     

湿法烟气脱硫添加剂的试验研究

采用我校自主设计研制的水浴脱硫设备,以石灰石为脱硫剂,通过模拟烟气净化冷态模型试验研究了甲酸,乙酸,已二酸,草酸作为有机添加剂对湿法烟气脱硫的影响,并讨论了其机理.试验结果表明,有机酸添加剂能减缓脱硫液pH值的降低过程,能在较低的pH值时得到较高的脱硫率.实验结果为有机添加剂在湿法脱硫中的应用提供了理论依据.     

Acid resistance of methanogenic bacteria in a two-stage anaerobic process treating high concentration methanol Wastewater

In this study, the two-stage upflow anaerobic sludge blanket (UASB) system and batch experiments were employed to evaluate the performance of anaerobic digestion for the treatment of high concentration methanol wastewater. The acid resistance of granular sludge and methanogenic bacteria and their metabolizing activity were investigated. The results show that the pH of the first UASB changed from 4.9 to 5.8 and 5.5 to 6.2 for the second reactor. Apparently, these were not the advisable pH levels that common methanogenic bacteria could accept. The methanogenic bacteria of the system, viz. Methanosarcina barkeri, had some acid resistance and could still degrade methanol at pH 5.0. If the methanogenic bacteria were trained further, their acid resistance would be improved somewhat. Granular sludge of the system could protect the methanogenic bacteria within its body against the impact of the acidic environment and make them degrade methanol at pH 4.5. The performance of granular sludge was attributed to its structure, bacteria species, and the distribution of bacterium inside the granule. Translated from Acta Scientiae Circumstantiae, 2004, 24(4): 633–636 [译自: 环境科学学报]     

硝酸银滴定法与硫氰酸汞分光光度法测定水中氯化物（Cl^-）的方法比对

用硝酸银滴定法、硫氰酸汞分光光度法分别测定高浓度的考核已知样及低浓度的考核未知样，均合格。说明两种方法都能满足水和废水中氯化物（Cl^-）测定的需要。     

2500 m3多级内循环(MIC)厌氧反应器在柠檬酸废水处理工程中的应用

MIC反应器是在UASB反应器的基础上发展起来的第三代厌氧反应器,它具有效率高、能耗低、投资少、占地省等优点。作者所在单位自行研制、安装、调试的生产规模2500m3MIC反应器用于处理高浓度柠檬酸生产废水,经过两年多的启动和实际运行,在水力停留时间12.5h,COD有机负荷12kg·m-3·d-1时,COD去除率仍始终在90%左右。     

模拟酸露对植物影响的实验

模拟酸露对植物影响的实验结果表明，用酸露处理后，蚕豆的生理指标发生一定的变化，尤以ｐＨ１３．０时的变化较明显，显示了模拟酸露对植物的伤害作用。     

一个填埋场的气体排放控制系统的建立及其从中得到的几点启示

介绍位于纽约州北汉姆斯特城的ＰｏｒｔＷａｓｈｉｎｇｔｏｎ城市固体废弃物填埋场填埋气体的排放、监测和处理系统及其有关测试数据和从中得到的启示．