文山县饮用水水源铁锰超标调查研究、处理方法及建议

结合文山县当前饮用水源中铁锰超标的实际情况，分析了周边环境对文山县饮用水水源地的影响，阐述了饮用水中铁、锰超标对人体健康的危害，提出了解决饮用水中铁锰超标问题的必要性和可行方法，并提出相关的对策和建议。     

填埋场渗滤液水质变化预测模型实验研究

利用垃圾污染负荷浸出实验装置对下坪垃圾填埋场渗滤液水质变化规律进行了模拟研究。并利用实验数据通过指数回归法确定了渗滤液水质预测模型的有关参数。实验结果和现场监测数据表明,单批填埋垃圾渗滤液的浓度在垃圾填埋75d后达到最大值,COD最大可达31581mg/L。利用渗滤液水质预测模型计算表明,垃圾填埋90．9d后垃圾渗滤液COD达到最大值,模拟计算结果和现场监测数据符合较好,说明该模型以及通过污染负荷浸出实验得出的模型参数可以较准确地对填埋场渗滤液水质变化进行预测。     

地面氧化亚氮排放静态箱测定技术

氧化亚氮是最重要的温室效应气体之一,国际科学界对其进行了大量的研究。开展氧化亚氮研究最重要的方面是测定技术,目前主要有静态箱法和微气象法,而以静态箱技术的使用最为广泛。静态箱技术也有其优点和缺点。文章从基本原理、取样箱设计、取样时间策略、自动采样箱设计、气相色谱测定技术参数、计算方法及自动测定系统等方面,系统介绍静态箱技术。我国在氧化亚氮研究上还较少,已被测定的土地类型非常有限,文章将有助于促进我国在这方面的研究。     

广州白云山春季降水及广西苗儿山云雾水中有机弱酸的研究

利用离子色谱法测量了广州白云山春季降水及广西苗儿山云雾水中的甲酸和乙酸,并同时测定了降水中阴离子(F~-,Cl~-,SO_4~(2-),NO_3~-)和阳离子(Na~+,NH_4~+,K~+,Ca~(2+),Mg~(2+)。用多元逐步回归、多对多双重筛选回归及R聚类分析的多元统计的数学方法分析了降水中有机弱酸间及与阴阳离子间的关系。讨论了有机酸的来源及其对酸雨中酸度的贡献。     

缺氧／厌氧／好氧工艺的脱氮除磷研究

通过实验研究缺氧环境倒置，来比较对Ａ／Ａ／Ｏ工艺脱氮除功能的影响。结果表明，与常规Ａ／Ａ／Ｏ（厌／缺／好）工艺相比，倒置后的工艺具有更好的脱氮除磷效果，在同等条件下，倒置系统的出水中ＰＯ４＾３－Ｐ明显降低，而比反硝化速率却可３０－５０％，该文还进一步揭示了聚磷微生物在各种环境下的释磷和吸磷规律及其相互关系。     

Heavy metals in urban ambient PM10 and soil background in eight cities around China

The ambient PM₁₀ and background soil samples were collected and analyzed with ICP-AES in eight cities around China to investigate the levels of ten heavy metals (Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, and Pb). The mean concentrations of ten heavy metals in PM₁₀ of the eight cities of China followed the order of Zn?>?Pb?>?Mn?>?Cu?>?Ni?>?Cr?>?Co?>?V. The metals in the ambient PM₁₀ and soil were compared in each city to evaluate the heavy metal mass fraction from anthropogenic sources in ambient air. The CD values in these cities were all above 0.2, indicating that the ingredients spectrums of PM₁₀ and soil vary markedly. Most heavy metals were enriched in PM₁₀, except Fe and Ti. The results showed that almost all the cities suffer important heavy metal pollution from anthropogenic sources. The eight cities were also grouped according to their similarity in heavy metals of ambient PM₁₀ by cluster analysis to investigate the relationship between the heavy metals and the pollution sources of each city. The conclusion was that the eight cities were divided into three clusters which had similar industrial type and economy scale: the first cluster consisted of Shenzhen, Wuxi, and Guiyang; followed by Jinan and Zhengzhou as the second grouping; and the third group had Taiyuan, Urumqi, and Luoyang.     

利用网络平台进行安全培训

介绍了利用网络平台进行安全培训的特点,分析建立网络平台必须完善的培训条件,确定了安全培训的内容和目标与任务.     

冻融循环对黏质粗粒土抗剪强度影响的试验研究

通过室内循环冻融循环试验和三轴不固结不排水(UU)压缩试验研究了循环冻融作用与细砾组含量(P_(2-5))对黏质粗粒土抗剪性能的影响。结果表明,冻融循环作用对黏质粗颗粒土的应力—应变曲线性状具有一定的影响,可使其由未冻融的应变软化向应变硬化转变的趋势,但随着细砾组P_(2-5)含量的增加,冻融作用对其影响逐渐减弱。随着冻融循环次数的增加,土样剪切强度呈现逐渐衰减,且在5～9次冻融循环次数后基本保持不变,多次循环冻融作用后剪切强度最大衰减幅度可达40%。弹性模量随冻融循环次数的增加上下波动较大但整体呈现下降趋势。在抗剪强度指标方面,冻融作用对黏聚力影响比较显著,随着冻融循环次数的增加,黏聚力逐渐减小,最大衰减幅度可达65%,而内摩擦角上下波动较大无明显趋势。此外,随着细砾组P_(2-5)含量的增加,剪切强度、弹性模量及抗剪强度指标均呈现不同程度的减小,这与粗粒土内部粗颗粒和细颗粒占比及其强度发挥机制有关。     

250轧机、370轧机除尘系统设计研究

通过分析氧化钼烟尘的物化性质及扩散原理 ,提出了 2 5 0轧机、370轧机系统除尘设计方案     

Which is more cost-effective? A comparison of two wastewater treatment models in China–Singapore Suzhou Industrial Park,China

The study examines the cost-effectiveness of two wastewater treatment models in China so as to provide a choice for policymaking. We choose the wastewater treatment system in China–Singapore Suzhou Industrial Park as case study because: 1) its sharing wastewater treatment plant (WTP); 2) its WTP was invested and operated by a private company; 3) its firms did not discharge illegal; 4) accessibility of data. The actual costs are determined by an extensive survey of 493 firms registered with the park. These data are also used to create a benchmark model assuming that each firm complies with environmental regulations by constructing its own WTP. The results show that sharing the WTPs greatly reduces the overall treatment cost. Furthermore, it reduces illegal discharges and improves the overall environmental performance of the park. Finally, it enforces cooperation among companies located in the park and creates a good image attracting more enterprises to join in.