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株冶锌浸出Ⅰ系统除锗的生产实践及措施 被引量:4
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作者 邓志明 《湖南有色金属》 CAS 2003年第5期22-24,52,共4页
论述了湿法炼锌中锗对电解沉积的影响,锗在溶出时的行为,同时对株冶锌浸出Ⅰ系统除锗的影响因素、生产实践作了一定总结、探讨,提出了强化除锗的措施。
关键词 湿法炼锌 中和共沉 电解 除锗
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电镀废水处理方案设计——以阳西县某厂为例
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作者 陈红雨 《三峡环境与生态》 2010年第2期40-43,59,共5页
采用占地少、能耗低、运行费用省、操作管理简便的处理工艺处理电镀废水,工艺成熟、可靠,处理后出水水质达到广东省地方标准《水污染物排放限值》DB44/26-2001中的一级标准。
关键词 电镀废水 两级破氰 两级中和共沉 达标排放
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Anthropogenic,detritic and atmospheric soil-derived sources of lead in an alpine poor fen in northeast China 被引量:1
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作者 BAO Kun-shan SHEN Ji +1 位作者 WANG Guo-ping TSERENPIL Shurkhuu 《Journal of Mountain Science》 SCIE CSCD 2016年第2期255-264,共10页
Ombrotrophic bogs are faithful archive of atmospheric metal deposition, but the potential for fens to reconstruct environmental change is often underestimated. In this study, some new data on the Pb depositional histo... Ombrotrophic bogs are faithful archive of atmospheric metal deposition, but the potential for fens to reconstruct environmental change is often underestimated. In this study, some new data on the Pb depositional history in northeast China were provided using two ^210Pb-dated peat sequences from a poor fen in the Fenghuang Mountain of Heilongjiang province. Anthropogenic, detritic and atmospheric soil sources were discriminated using a two-step sequential digestion (weak acid leaching to liberate mobile Pb which is often regarded as anthropogenic Pb, especially for recent samples) and a ratio of unsupported ^210Pb and supported ^210Pb with the logic of that the ^214Pb mainly represents the residual detritus (constant throughout the core) and the unsupported ^210Pb arises from atmospheric fallout. A higher ^210Pb/^214Pb suggests more contributions from atmospheric deposition to the Pb content in the peat, and a ratio of 10 was defined to indicate the boundary between detrific input and atmospheric deposition. The detritic Pb was estimated to be 10-13 mg·kg^-1, the anthropogenic Pb ranged from 10-80 mg·kg^-1, and the atmospheric soil-derived Pb ranged from 〈 5 mg·kg^-1 to 30 mg·kg^-1. The history of anthropogenic Pb pollution over the last 150 years was reconstructed, and the calculated Pb deposition rate (AR Pb) ranged from 5 to 56 mg·m^-2·yr^-1. Using Ti as a reliable reference, the enrichment factor of Pb (EF Pb) relative to the upper continental crust was calculated. Both AR Pb and EF Pb increased with time, especially after the foundation of the People's Republic of China. This is consistent with increasing industrialization and coal burning in the last 60 years in northeast China. The present record of anthropogenic Pb deposition was consistent with the previous reports and an increasing trend of environmental pollution due to anthropogenic activities, in contrasts to Europe and North America which have experienced a major environmental cleanup. For the first time, this work estimates atmospheric Pb deposition via a minerotrophic peat core in China. This will enhance the use of peat archives for studies of environmental change. 展开更多
关键词 Ombrotrophic bog Minerotrophicpeatland Pb deposition rate Enrichment factor ^210Pb and ^137Cs Metal pollution
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