Study On The Heavy Metal Contamination And Phytoremediation Of The Manganese Mine Farmland Soil, Xiushan

In recent years, with the metal mining and smelting industries of rapid development, in promoting rapid economic development, mining and smelting pollution problems caused by heavy metals is also increasingly a cause for concern, especially heavy metals pollution of soil and crops is focus and hot spots. Heavy metals in the human body due to the cumulative effects of sustained and prominent teratogenic, carcinogenic and mutagenic effects.Thus, metal mines in heavy metal contamination of soil and crop conditions research is very necessary and of great practical significance.This paper uses Xiushan Tujia and Miao Autonomous County of Chongqing Municipality area of soil manganese as the research object, through on-site investigation, sampling, and in the indoor use of atomic absorption and the completion of BCR classification methods such as heavy metals extraction and morphological tests, combined with test data and soil and vegetables of heavy metal pollution evaluation methods, Xiushan manganese zone soil and vegetables and the ecological hazards of heavy metal pollution level evaluation, results showed that the study of soil for Pb, Zn, Cu, Mn, and Cd contaminated soil heavy metal compound by the heavy Pb, Cu, Mn, and Cd pollution, light pollution, Zn, Cr basically not been contaminated.Potential ecological risk assessment of the results of moderate ecological hazard. Investigate the effect of seven vegetables (potatoes, lettuce, pea sprouts, lotus white, Swiss chard, garlic, leek), the Pb, Zn, Cu, Cr, and Cd five kinds of heavy metals are seriously beyond the limits of national food hygiene standards, integrated pollution Index of evaluation results was severe pollution, have seriously threatened the safety of vegetables, are not edible.Xiushan Manganese Mine for the heavy metal pollution status, selected through the field survey and greenhouse artificial nutrition solution or soil culture experiments proved by the hyperaccumulator Phytolacca acinosa Roxb,C. ambrosioides L, Viola baoshanensis to conduct field research simulated repair of soil test results show that more than a few plants did not show in the wild or culture medium under the super-rich features, this just validates Shi-Rong Tang said, "field found in super-accumulation of plants in cultivation under the condition that they may not necessarily produce hyperaccumulation phenomenon.Therefore, further validation of greenhouse and field trials are necessary, "and further details to be used for the actual repair hyperaccumulator will need to go through field trials.By adding a variety of chelating agents on the impact of soil and vegetation was found by adding chelating agents can absorb heavy metals in soil and plant-state absorption and accumulation of heavy metals selective catalytic role, rather than simply talking about the past, scholars, promotion or inhibition, which is heavy metal contamination of soil conditions and plant species by their nature and other factors.Learn from ecological agriculture, three-dimensional agriculture and life forms of plants of different ways to build inter-community, found that increase biomass at the same time, different ways to build communities of plants help to improve the enrichment of different heavy metals, which is a new kind of help improve the plants efficiency of heavy metals in soil restoration ideas and initiatives, and operability, with further study of the value and good prospects.