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| 【目的】研究榆中县高原夏菜尾菜中重金属含量及污染程度，以期为地方政府制定安全无害化处理尾菜的方案提供理论依据和技术支撑。【方法】选取具有代表性的5处土壤及蔬菜，用原子吸收分光光度计及AFS-820型双道原子荧光光度计对样品中的重金属含量进行测定，采用单因子污染指数法和综合污染指数法，以国家评价标准计算污染指数，分析和评价了背景土壤、农田土壤、蔬菜和尾菜中总Hg、全Mn、Pb、总Cr、Cd、Fe、Cu的含量与污染程度。【结果】污染土壤（即填埋了尾菜的农用土壤）中的总Hg（Pi =3.41）、Cd（Pi =4.84）均为重度污染，全Mn为轻度污染；尾菜中金属元素的含量均高于相应的蔬菜的含量，蔬菜与尾菜中总Hg的单项污染指数Pi分别为6.04和11.24,Cd的单项污染指数Pi分别为14.22和24.84，为重度污染。蔬菜与尾菜的综合污染指数为分别为10.41和18.21，已经达非常严重的污染程度。【结论】大部分重金属离子通过尾菜有一定的富集作用，农田土壤、蔬菜与尾菜中的大部分金属含量已严重超标。 |
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wanfuping
木虫 (小有名气)
- 翻译EPI: 35
- 应助: 0 (幼儿园)
- 金币: 2378.1
- 红花: 3
- 帖子: 243
- 在线: 329.2小时
- 虫号: 2050897
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RXMCDM: 金币+1, 多谢应助！ 2014-09-24 12:34:00
msjlxs: 金币+10, 翻译EPI+1 2014-10-11 12:24:39
RXMCDM: 金币+1, 多谢应助！ 2014-09-24 12:34:00
msjlxs: 金币+10, 翻译EPI+1 2014-10-11 12:24:39
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Aiming at providing theoretical basis and technological support for local government to formulate schemes for safely and harmlessly handling natsuna, the amount of heavy metal in plateau natsuna from Yuzhong County, Gansu Province, P.R. China, and their pollution levels are studied in this paper. Select 5 pieces of typical soil and the vegetables growing on these soils, measure the amount of heavy metal in these samples with atomic absorption spectrophotometer and AFS-820 double channel atomic fluorescence spectrophotometer, and according to national evaluation criterion, compute contamination index with single factor contamination index method and comprehensive factors comprehensive contamination index method, and analyze and evaluate the amount and concentration of Hg, whole Mn, Pb. whole Cr, Cd, Fe, Cu in background soil, farmland soil, vegetables and natsuna. The results of analysis show that, agricultural soil with buried natsuna is heavily contaminated by whole Hg, and Cd, while the Pi of whole Hg is 3.41, Cd 4.84, and lightly contaminated by whole Mn, and the metal amount in natsuna is higher than amount in corresponding vegetables without exception, while single contamination index Pi of whole Hg in vegetable and natsuna are 6.04 ,11.24, respectively, and Cd 14.22, 24.84, respectively, and they are both highly contaminated, and comprehensive contamination indexs for vegetable and natsuna are 10.41, 19.21, respectively, and they both are extremely contaminated. Most of heavy metals can present some concentration effect through natsuna, and most metal amounts in farmland soil, vegetables and natsuna have reached far beyond the standard allowed. 注：1 “原夏菜尾“和“菜尾”，我都用了“natsuna”，如有不当，请换掉； 2 “全Hg”等，我译成”whole Hg”, 如有不妥，请换掉； 3 全文我只用了四句，你可以根据需要拆分。 |
2楼2014-09-23 21:41:56
wanfuping
木虫 (小有名气)
- 翻译EPI: 35
- 应助: 0 (幼儿园)
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- 虫号: 2050897
- 注册: 2012-10-09
- 性别: GG
- 专业: 人工智能与知识工程
3楼2014-09-23 21:46:34
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