排序方式: 共有47条查询结果,搜索用时 31 毫秒
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Reductive Dechlorination of Tetrachloroethylene by Soil Sulfate-Reducing Microbes under Various Electron Donor Conditions 总被引:7,自引:0,他引:7
Biotransformation of tetrachloroethylene (PCE) by soil sulfate-reducing bacteria was investigated using acetate, lactate and methanol as electron donors. Results show that the effectiveness of biotransformation of PCE by soil sulfate-reducing bacterial is dependent upon the type of electron donor used. 相似文献
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聚吡咯修饰电极测定废水中的镉 总被引:4,自引:0,他引:4
沙兆林 《环境监测管理与技术》1998,10(1):34-35
讨论了聚吡咯对镉离子的配位富集作用及其影响因素,并用循环伏安法加以证实。在0.1-50mg/L的范围内,Cd62+浓度与还原峰电流成线性关系。检测限为0.05,g/L可用于废水测定,方法简便,快速,干扰少。 相似文献
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南京市正在构建的总量减排监测体系,以污染源在线监控系统为核心,有机整合在线和手工监测资源,以信息化平台为体系运转载体,以期为减排管理提供准确高效的数据支持.在总量减排监测体系建设和推广过程中需重点解决在线监测系统的运行管理、在线监测与手工监测的整合,以及信息系统建设等问题. 相似文献
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A cost-efficient way to allocate carbon dioxide (CO2) emission reductions among countries or regions is to harmonise their marginal reduction costs. This could be achieved by a market of emission reduction units (ERUs). To model such a market, we use a multi-regional MARKAL-MACRO model. It gives insights into the consequences of co-ordinating CO2 abatement on regional energy systems and economies. As a numerical application, we assess the establishment of a market of ERUs among three European countries for curbing their CO2 emissions. 相似文献
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The objective of this study is to examine the effect of clayminerals (illite, montmorillonite, and kaolinite) on chromate (Cr(VI)) reduction by several low molecular weightorganic compounds. Batch experiments at pH ranging from 3.0 to6.0 and 25 °C showed that 2:1 layered clays illite andsmectite catalyzed Cr(VI) reduction by oxalate. The catalyticeffect increased as pH was decreased. The 1:1 clay kaolinite hadno catalytic effect under comparable conditions. Direct Cr(VI)reduction by reactive moieties associated with illite andmontmorillonite was observed, but at a much slower rate than thecatalytic pathway. Cr(VI) reduction by glyoxylic acid, glycolicacid, lactic acid, and mandelic acid was accelerated by illite,although aqueous phase reduction might occur in parallel. Theseresults suggest that Cr(VI) reduction rates in subsurfaceenvironments rich in organic compounds may be elevated throughcatalysis of surface-bound metals and/or soluble species from theclay minerals, and as a result, higher than those expected fromaqueous phase reaction alone. Such rate enhancement for Cr(VI)reduction needs to be accounted for when developing new remedialtechniques for chromium site remediation or assessing its naturalattenuation. 相似文献
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在 pH 5 0~ 6 2、甲醛 -邻苯二甲酸氢钾介质和沸水浴中 ,微量二氧化硫能迅速还原三价铁为二价铁 ,使生成的邻菲口罗啉 -铁 (Ⅱ )铬合物量增加 ,导致溶液颜色变深 ,据此测定二氧化硫的含量。方法测定范围为 0mg/L~1 4mg/L ,检测限为 0 4mg/L。用于测定空气中二氧化硫 ,获得了满意的结果 相似文献
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