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【答案】应助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
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
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。 |
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