植物对重金属锌的吸收及其体内积聚特征研究
毕业论文关键词：重金属；锌；植物修复；吸收；积聚
Three common plants absorb and accumulate Characteristics on heavy metals Zinc
Abstract: In recent years, due to the agricultural production process of pesticides, extensive use of fertilizers and the use of wastewater for irrigation of farmland, resulting in increased zinc content of heavy metals in the soil, which causes heavy metals in soil zinc pollution is very serious, the basis of previous research, understand plant repair technology can be a good soil, reducing the heavy metal content in soil, so this paper plants to heavy metals in soil zinc absorption capacity for the corresponding study. Through the experiment, configure different concentrations of zinc contaminated soil environment simulated pot culture, the configuration of concentrations of 375、750 and 1500 mg / L zinc standard solution, and then draw the corresponding zinc standard curve. Using atomic absorption spectrophotometry three common plants (Pennisetum, Panicum virgatum and Miscanthus sinensis) leaves the zinc content, observe the three characteristics of plants to absorb heavy metals zinc and zinc absorption feature accumulate in plants were analysis, the ability to explore these three plants to absorb and accumulate Heavy metals zinc. The results show that: with the accumulation of time, the content of heavy metals zinc plants also increased, the zinc content of plant leaves are basically over time showed a gradual increasing trend, along with irrigation zinc concentration of the solution increases, during the same period, the zinc content of plant leaves was gradually increasing trend; plants zinc absorption increase over time, gradually increasing the amount of zinc absorption. When the zinc concentration of the solution is the same, the same period of the irrigation solution of zinc, zinc absorbed within Pennisetum blade than switchgrass and Miscanthus leaves much zinc absorption, while during the same period, Panicum virgatum, Miscanthus zinc absorption than zinc uptake quantity. Therefore it can be concluded when the high zinc content in the soil, using the content of zinc in soil Pennisetum better.
Keywords: Heavy metal; zinc; phytoremediation; absorption; accumulation
目录
1. 引言 1
1.1 研究背景 1
1.2 国内外研究现状 2
1.3 植物样品采集 3
1.4 本章小结 3
2 实验过程 5
上一篇：酵母多糖的提取工艺研究