干旱绿洲地区土地利用总体规划修编中的几个问题

提出了绿洲土地持续利用应遵循的４条原则：系统协调原则、区域稳定原则、动态平衡原则和用养结合原则,在此基础上讨论了适应绿洲土地利用总体规划修编的４种模式     

深软土场地上高层住宅的地震安全性问题

现代城市建设中高层住宅建在深软土场地上是难以完全避免的。因深软土场地上的高层住宅易遭震害,地震安全性问题应予充分重视。建议将高层住宅建设工程列入需作“工程场地地震安全性评价”之列,高层住宅的防震减灾宜从城市建设规划着手,针对高层住宅易遭震害的动力学特性等采取相应对策。     

增敏碘量法同时测定微量Mn(Ⅱ)、 Mn(Ⅶ)、 Cr(Ⅲ)、 Cr(Ⅵ)

介绍了用增敏碘量法同时测定微量的Ｍｎ（Ⅱ）、Ｍｎ（Ⅶ）、Ｃｒ（Ⅲ）和Ｃｒ（Ⅵ）。将样品中的Ｍｎ（Ⅶ）和Ｃｒ（Ⅵ）用Ｎａ２ＳＯ３预先还原,在ｐＨ为３．０的醋酸盐介质中对Ｍｎ（Ⅱ）和Ｃｒ（Ⅲ）用过量ＫＩＯ４氧化（当用Ｈ２Ｐ２Ｏ２－７掩蔽Ｃｒ（Ⅲ）时,只有Ｍｎ（Ⅱ）被氧化）,过剩的ＩＯ－４用钼酸盐掩蔽,加入ＫＩ后,以Ｎａ２Ｓ２Ｏ３滴定游离出的Ｉ２。此法对Ｍｎ的测定范围为２９～１４７０６μｇ／Ｌ,相对标准偏差为０．３１％～１．１８％;对Ｃｒ的测定范围为５９～１０２９４μｇ／Ｌ,相对标准偏差为０．３６％～１．１２％。此法与常规滴定法测定Ｍｎ和Ｃｒ相比,分别可增敏２０倍和１２倍     

维护职工安全健康合法权益是工会的神圣职责

保护劳动者在生产过程中的生命安全与健康,是经济建设的保障条件,也是社会发展的目标之一。党和国家十分重视安全生产工作,江泽民等党中央和国务院的领导同志对安全生产王作多次作出重要指示,强调了在社会主义市场经济条件下加强安全生产工作的重要意义,明确提出了做好这项工作的要求。按照企业负责、行业管理、国家监察和群众监督的安全生产管理体制,工会组织在监督企业安全生产和维护职工安全健康权益方面负有重要职     

炼化设备检维修遗留物风险评估及安全对策研究

分析了炼化企业设备检维修后，设备顶部、旋梯、平台等处遗留物的现状及可能对生产设备、人员产生的伤害。针对检维修遗留物性质、产生伤害的可能性建立风险评价方法并提出安全对策。     

电炉烟气热管余热回收的除尘系统设计

电炉烟气余热回收是近几年最新发展的节能减排措施。介绍目前应用的热管余热回收装置的基本结构、工作原理及具有的优势,该装置已经得到成功应用,特别适合用于VOD冶炼特钢工艺中替代蒸汽锅炉。     

中文智能pH在线监控仪及其算法开发

介绍了中文智能ｐＨ在线监控仪的性能、工作原理，功能及软件硬件设置，分析讨论了几咱不同的控制算法。     

Sorption and biodegradability of sludge bacterial extracellular polymers in soil and their influence on soil copper behavior

Bacterial extracellular polymers (BEP) affect the translocation and fate of organic and inorganic pollutants in terrestrial and aquatic ecosystems. In this study, BEP from activated sludge was compared with sludge dissolved organic matter (DOM) in terms of behavior and effects on the mobilization and bioavailability of Cu in a well-aged Cu-contaminated orchard sandy loam. Addition of sludge BEP (10-200 mg dissolved organic carbon [DOC] L(-1)) to the soil resulted in 1.6- to 12.8-fold-higher soil soluble Cu concentration over the control and 1.3- to 2.2-fold over sludge DOM of the same concentration. Consequently, the Cu uptake by the ryegrass (Lolium perenne L., cv. Target) grown in the soil was increased by 31% due to interval watering of 100 mg DOC L(-1) of sludge BEP solution in a 35-d period. The influence of sludge BEP on mobilizing soil Cu could be maintained as long as 60 d or more, depending on BEP biodegradation status. The findings that sludge BEP promoted Cu mobilization and bioavailability could be attributed to less adsorption of BEP by soil, slow degradation, and higher affinity with Cu. For example, after 3 wk of aerobic incubation, the soluble Cu present in the sludge DOM-treated soil was reduced to about the level of the control, while the concentration of soluble Cu in BEP-treated soil was 6.2 times higher than that in the control. Therefore, sludge BEP could act as a facilitated-transport carrier of Cu. The environmental risk of Cu should receive much attention if BEP is incorporated into soils.     

Hydrochemical characteristics,trace element sources,and health risk assessment of surface waters in the Amu Darya Basin of Uzbekistan,arid Central Asia

Environmental Science and Pollution Research - Thorough knowledge of hydrochemical characteristics and trace element concentrations in surface waters is crucial for protection of this resource,...     

纳米ZnO粉体吸附非标柴油有害物质研究

文章用纳米ZnO粉体对非标柴油中的有害物质进行吸附去除。在投加粉体量为非标柴油质量20%,研磨时间为8h的条件下,氧化锌粉体能有效吸附非标柴油中有害物质,通过ICP分析发现,纳米ZnO粉体对Ca、Na、Pb等有较强的吸附效果,第一次吸附量分别达到15.236mg/g、8.506mg/g、2.06mg/g,平均吸附率分别达73.41%、80.76%、70.14%;粉体的SEM和IR分析表明,纳米级粉体具有优越吸附性能主要是因为其具很高的比表面能以及粉体表面含有羰基、羟基等多种官能团;取吸附后粉体经环己烷洗涤,在300℃下煅烧后进行X射线和EDS分析,并重复吸附实验发现,粉体吸附性能仍然良好。