复合絮凝剂XG用于工业废水的处理

利用自制的复合絮凝剂 XG处理多种工业废水 ,研究了废水处理工艺过程和处理条件对絮凝剂处理废水效果的影响。实验结果表明 ,XG应用于造纸、毛巾厂、化工等工业废水处理 ,CODCr去除率达 75%～ 80 % ,脱色率 >80 % ,处理操作工艺简单 ,成本低 ,处理效果优于聚合氯化铝。     

GROUND WATER NITRATE REDUCTION IN GIANT CANE AND FOREST RIPARIAN BUFFER ZONES1

ABSTRACT: Ground water contamination by excess nitrate leaching in row‐crop fields is an important issue in intensive agricultural areas of the United States and abroad. Giant cane and forest riparian buffer zones were monitored to determine each cover type's ability to reduce ground water nitrate concentrations. Ground water was sampled at varying distances from the field edge to determine an effective width for maximum nitrate attenuation. Ground water samples were analyzed for nitrate concentrations as well as chloride concentrations, which were used as a conservative ion to assess dilution or concentration effects within the riparian zone. Significant nitrate reductions occurred in both the cane and the forest riparian buffer zones within the first 3.3 m, a relatively narrow width. In this first 3.3 m, the cane and forest buffer reduced ground water nitrate levels by 90 percent and 61 percent, respectively. Approximately 40 percent of the observed 99 percent nitrate reduction over the 10 m cane buffer could be attributed to dilution by upwelling ground water. Neither ground water dilution nor concentration was observed in the forest buffer. The ground water nitrate attenuation capabilities of the cane and forest riparian zones were not statistically different. During the spring, both plant assimilation and denitrification were probably important nitrate loss mechanisms, while in the summer nitrate was more likely lost via denitrification since the water table dropped below the rooting zone.     

我国硒资源产业现状及创建产业发展基金构想

文章总结了国内外硒资源开发现状，分析了硒资源的发展趋势，提出了我国硒资源产业存在的问题：产品趋同、技术创新不足、缺乏规划、政策引导不力、全民硒意识薄弱及资金匮乏。针对资金瓶颈问题提出创建我国硒资源产业发展基金的构想，探讨了发展基金的运作战略、经营思路及发展步骤。     

紫露草微核技术对工业废水监测的应用

利用紫露草微核技术，以自来水为对照，不同浓度的氯化汞、三氧化二砷溶液及十几个工厂废水进行微核效应比较试验，筛选出破坏遗传物质的工业废水及其相应的污染水平。观察紫露草微核率变化及细胞的分裂情况，证明紫露草微核技术是监测工业废水的良好方法。     

火炸药热自燃点测试及数据自动记录的探讨

简述了所建立的炸药热自燃点测试系统的结构和工作原理，阐明了在多试样热自燃点测试中，采用温度数据自动记录系统的必要性。着重讨论了所研制的多试样火炸药热自燃点自动记录仪的结构和工作原理。     

胜利油田生活污水调查及评价

随着人民生活水平的提高，城市人均用水量逐年增加，伴随产生的生活污水已经成为不可忽视的污染源。胜利石油管理局供水公司于１９９３年对胜利油田的污水排放情况进行了调查，调查各单位职工住宅区和机关办公区所排放的生活污水的情况，包括排放生活污水单位的名称、人数、生活用水量、污水排放量和污水水质等，并提出了生活污水的治理对策。     

Differences and similarities of gas and dust explosions: A critical evaluation of the European ‘ATEX’ directives in relation to dusts

Explosive gas mixtures and explosive dust clouds, once existing, exhibit similar ignition and combustion features. However, there are two basic differences between dusts and gases which are of substantially greater significance in design of safety standards than these similarities. Firstly, the physics of generation and up-keeping of dust clouds and premixed gas/vapour clouds are substantially different. This means that in most situations where accidental explosive gas clouds may be produced quite readily, generation of explosive dust clouds would be highly unlikely. Secondly, contrary to premixed gas flame propagation, the propagation of flames in dust/air mixtures is not limited only to the flammable dust concentration range of dynamic clouds. The state of stagnant layers/deposits offers an additional discrete possibility of flame propagation.

The two European Directives 94/9/EC (1994) and 1999/92/EC (1999) primarily address gases/vapours, whereas the particular properties of dusts are not addressed adequately. Some recent IEC and European dust standards resulting from this deficiency are discussed, and the need for revising the two directives accordingly is emphasized.     

燃煤工业锅炉SO2污染防治技术的选择及评价--中国燃煤工业锅炉SO2污染综合防治对策(八)

论述了中国燃煤工业锅炉SO2污染防治技术的选择及评价，其中主要包括：《中国燃煤工业锅炉SO2污染综合防治对策》的产生、主要内容、特点、选择、评价及其实施的意义。     

超滤膜处理火电厂废水的工业性试验研究

结合现场中试探讨了超滤作为反渗透预处理工艺的可行性，确定了超滤工艺处理某火电厂废水的基本参数，研究了超滤膜的恢复及效果，并且提出了系统设计的相关建议，对工业系统设计具有指导意义。     

TiO2光催化氧化的研究进展

概述了TiO2光催化氧化降解水中污染物的原理及TiO2光催化剂的制备，提出了增强其活性的途径。TiO2光催化氧化可应用于印染、农药、造纸等工业废水及饮用水处理中，研制高效的负栽型纳米TiO2光催化剂、解决太阳能利用问题、开发多功能光催化反应器是今后TiO2光催化氧化的发展趋势。