Study On The Technology Of Chemical Enhanced Phytoremediation Of Mercury-contaminated Soil

Heavy metals in soil is one of the most important pollutants. Heavy metal contamination of soil will harm human health through the food chain. As a result, the repair of heavy metal contamination of soil management technology has become an environmental engineering research in the field of chemical hot one. At present, the heavy-metal contamination in the soil through physical, chemical plants and repair technology, and other methods. Phytoremediation technology which is the best ecological environment of a treatment technology,but its greatest disadvantage is the slow-repair cycle. To this end, the projects selected Lupinus, Brassica juncea and Calendula officinalis three kinds of enrichment plants; Sodium thiosulfate and surfactant two kinds of chemical control. A pot experiment to study the mercury pollution in soil chemical control agent under the enhanced phytoremediation technology, governance aimed at finding a mercury-contaminated soil in an effective way.The results showed that, regardless of unpolluted soil or mercury-contaminated soil, plant the size of mercury concentration coefficient are Lupinu>Calendula officinalis>Brassica juncea, mercury-contaminated soil enrichment coefficient of Lupinu as high as 12.82 percent, to pollution Repair of the soil has good results; 90d after planting and soil residues of mercury the size of Calendula officinalis