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761.
通过大众媒体和教育系统的作用提高公众的环境意识是欧盟-中国辽宁综合环境项目的公众环境意识子项目.作者随其项目组环境教育学习考察团到欧洲进行了20多天的考察,走访了德国、奥地利等六国19个市镇,参观了34个有关的机构和单位.所见所闻都给大家留下了深刻的印象. 相似文献
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Jin Ma Li-bo Pan Qin Wang Chun-ye Lin Xiao-li Duan Hong Hou 《Environmental geochemistry and health》2018,40(1):295-301
A total of 60 children (31 males and 29 females) between the ages of 3 and 12 years were randomly selected from Lanzhou City in Gansu Province, northwest China. Hand (soil/dust) SD samples from these children were collected using hand wipes. We determined the approximate amounts of hand SD and the concentrations of three tracer soil elements (Ce, Y, and V) in these samples. The approximate amounts of hand SD ranged from 42.28 to 173.76 mg, with a median value of 85.42 mg. In addition, the mean amounts of hand SD estimated using the concentrations of Ce, Y, and V in the samples were 4.63, 3.43, and 3.42 mg, respectively. The amount of hand SD varied greatly among the age groups: primary school children had more hand SD than kindergarten children, males had more hand SD than females, and children from rural areas had more hand SD than those from urban areas. The rates of daily ingestion of hand SD for kindergarten and primary school children were estimated to be 7.73 and 6.61 mg/day, respectively. 相似文献
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Nandita Singh Lena Q. Ma Joseph C. Vu Anshita Raj 《Environmental pollution (Barking, Essex : 1987)》2009,157(8-9):2300-2305
This study investigated the effects of arsenic on the in vitro activities of the enzymes (nitrate reductase and nitrite reductase) involved in nitrate metabolism in the roots, rhizomes, and fronds of four-month old Pteris vittata (arsenic – hyperaccumulator) and Pteris ensiformis (non-arsenic--hyperaccumulator) plants. The arsenic treatments (0, 150, and 300 μM as sodium arsenate) in hydroponics had adverse effects on the root and frond dry weights, and this effect was more evident in P. ensiformis than in P. vittata. Nitrate reductase and nitrite reductase activities of arsenate-treated plants were reduced more in P. ensiformis than in P. vittata. This effect was accompanied by similar decreases in tissue NO3? concentrations. Therefore, this decrease is interpreted as being indirect, i.e., the consequence of the reduced NO3? uptake and translocation in the plants. The study shows the difference in the tolerance level of the two Pteris species with varying sensitivity to arsenic. 相似文献
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Jing Hu Zuobing Xiao Rujun Zhou Weijun Deng Mingxi Wang Shuangshuang Ma 《Journal of Cleaner Production》2011,19(2-3):221-228
Circular economy (CE) focuses on resource-productivity and eco-efficiency improvement in a comprehensive way, especially on the industrial structure optimization of new technology development and application, equipment renewal and management renovation. The leather industry on the one side boosts the local economic development, on the other side however leads to the tremendous environment pollution and biological chains destruction. The CE model has been implemented as a new way of raw materials, water and energy consumption reduction in the leather industry. Reduce, Reuse, Recycle and Recover of the tannery effluents have been discussed in detail according to the different operation processes. The successful treatment approaches with analysis in the aspects such as wastewater, solid waste, sulfide, Chemical Oxygen Demand (COD), ammonium salt, chloride and chrome of the leather tannery with CE model provide guidance for the sustainable development of leather industry in the future. 相似文献
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Lv Ying Li Jia Chen Zhenxing Ye Hengpeng Du Dongyun Shao Li Ma Mengyu 《Environmental science and pollution research international》2021,28(2):1491-1501
Environmental Science and Pollution Research - A strain of silicon-activating bacteria was isolated from electrolytic manganese residue (EMR); identified as a species of Ochrobactrum by integrated... 相似文献