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231.
Wen Bei ** Qian Jin Chen Bin Shan Xiaoquan Research Center for Eco Environmental Sciences Chinese Academy of Sciences Beijing China 《环境科学学报(英文版)》1997,(2)
ChemicalformsofcobaltandnickelextractedbyM1,M3andCaCl2DTPAWenBei,QianJin,ChenBin,ShanXiaoquanResearchCenterforEcoEnviron... 相似文献
232.
HUANG Ze-chun AN Zhi-zhuang CHEN Tong-bin LEI Mei XIAO Xi-yuan LIAO Xiao-yong Centre for Environmental Remediation Institute of Geographical Sciences Natural Resources Research Chinese Academy of Sciences Beijing China. 《环境科学学报(英文版)》2007,(6)
In order to understand the similarity or difference of inorganic As species uptake and transport related to phosphorus in As-hyperaccumulator,uptake and transport of arsenate(As(V))and arsenite(As(III))were studied using Pteris vittata L.under sandculture.Higher concentrations of phosphate were found to inhibit accumulation of arsenate and arsenite in the fronds of P.vittata.The reduction in As accumulation was greater in old fronds than in young fronds,and relatively weak in root and rhizome.Moderateincreases,from 0.05 to 0.3 mmol/L,in phosphate reduced uptake of As(III)more than As(V),while the reverse was observed at highconcentrations of phosphate(1.0 mmol/L).Phosphate apparently reduced As transport and the proportion of As accumulated in frondsof P.vittata when As was supplied as As(V).It may in part be due to competition between phosphorus and As(V)during transport.Incontrast,phosphate had a much smaller effect on As transport when the As was supplied as As(III).Therefore,the results from presentexperiments indicates that a higher concentration of phosphate suppressed As accumulation and transport in P.vittata,especially inthe fronds,when exposed to As(V);but the suppression of phosphate to As transport may be insignificant when P.vittata exposed toAs(III)under sand culture conditions.The finding will help to understand the interaction of P and As during their uptake process in P.vittata. 相似文献
233.
In order to provide further references for studing on the causes of Kaschin-Beck discase (KBD) and measuring for its prevention and treatment from a macroscopic view, we analyzed the natural growth and declineof KBD and the effects of selenium and humic acid on its occurrence from an epidemiologic angle. In this article through a retrospective survey on the spots of disease areas by comparison between a change in water sources and that without. It was proved that a change in water sources was an effective measure for the prevention of KBD occurrence, and the pathogenic factor of KBD was one (or several kinds) of organic compounds or active radicals related to water. 相似文献
234.
235.
SpeciesanalysismethodsforhydrolysispolymerizationofaluminumFengLi,LuanZhaokun,TangHongxiaoResearchCenterforEcoEnvironmenta... 相似文献
236.
Liu Jian 《环境科学学报(英文版)》1997,9(3):376-384
China’senvironmentalscientificresearchandtechnologydevelopment:reviewandenvisageLiuJianBureauofS&TforResourcesandEnvironment,... 相似文献
237.
焦化废水处理中酚、氰降解细菌的分离选育 总被引:10,自引:0,他引:10
针对焦化废水为含酚、氰废水的特性,从焦化厂处理焦化废水的活性污泥和油泥中分离出能降解酚的细菌7株,降解氰的细菌8株,并对其降解能力进行了测定,结果表明,当酚浓度为150mg/L,经6h处理后0512菌株对酚的去除率达96.84%,当CN^-浓度为25mg/L经8h处理后,0501菌株对CN^-的去除率达99.96%。 相似文献
238.
Distribution of various aluminum fractions in surface water of the Le An River
ResearchCenterforEco-EnvironmentalSciences,Beijing100085,ChinaAbstract—Totalcon... 相似文献
239.
The addition of microbes for treating textile wastewater 总被引:3,自引:0,他引:3
Some strains and culture of bacteria which are able to decolorize dyes and degrade polyvinyl alcohol(PVA) were isolated and selected. A pilot scale facultative anaerobic-aerobic biological process was applied for treatment of textile wastewater containing dyes and PVA. Activated carbon adsorption was used as a tertiary treatment stage, and residual sludge from clarifier returned to the anaerobic reactor again. The pilot test were carried out with two systems. One was inoculated by acclimated sludge, and the another was adding the mixed culture of dye-decoloring and PVA-degrading bacteria for forming biological films, the latter was observed to be more effective than the former. The test has run normally for ten months with a COD loading of 2.13 kg/m3/day, a BOD5 loading of 0.34 kg/m3/day in anaerobic reactor; a COD loading of 1.71 kg/m3/day, a BOD5 loading 0.44 kg/m3/day in aerobic reactor. The pollutants removal efficiency by adding microbes was about 20% higher than that by acclimated sludge. The aver 相似文献
240.
On Peak Namjagbarwa (Tibet Plateau), Lushan Mountain (Province Jiangxi), Flower Mountain and Shangdianzi (Beijing, near Great Wall) aerosol samples have been collected by cascade samplers. For comparison aerosol samples from Beijing City, Pacific Ocean and South Pole also have been collected. Samples were analyzed with PIXE or XFA instruments. Factor analysis and enrichment factor calculation were performed to process the data. 相似文献