Research On The Remediation Of Combined Contatnination Of Heavy Metals And 十溴联苯醚 By Different Maize Cultivars

Electronic waste had become a new environmental problem, which was increasingly focused with the worldwide attention. This thesis taking Cd 10mg/kg,Pb 600mg/kg,Zn 600mg/kg,BDE-209 5mg/kg as the initial concentration, which was aim to explore the efficiency and mechanism of phytoremediation for twenty-nine maize cultivars on the repairing of combined pollution after 66 days. Meanwhile, selecting the maize cultivars which had the best adsorption capacity were significant, which were effectively repairing the combined pollution.The main results were as following:1. The accumulation orders of combined contamination in above-ground tissue and down-ground tissue of maize cultivars were down-ground tissue>above-ground tissue. The accumulation concentration of Zn was the most of all; Cd tended to be absorbed by the maize cultivars, but the translocation ability was worse. Pb which was hardly translocated was mainly accumulated in roots, and the removing rate of BDE-209 in maize cultivars was comparatively high.2. For Cd, Huaxiangnuo23 was the best for phytoremediation, the accumulation concentration in above-ground tissue was 5.79mg/kg, and that in down-ground tissue was 21.31mg/kg; For Pb, JinhaiI6 was the best for phytoremediation, the accumulation concentration in above-ground tissue was 52.50mg/kg, and that in down-ground tissue was 500.51mg/kg; For Zn, Zhongzinuo818 was the best for phytoremediation, the accumulation concentration in above-ground tissue was 984.84mg/kg, and that in down-ground tissue was 1445mg/kg; For BDE-209, Taixiangtianbaiuo was the best for phytoremediation, the removing rates was 57.4%.3.Among twenty-nine maize cultivars, the accumulation concentration of Zhongzinuo818 was better than other maize cultivars, especially for Cd and Zn. The absorption of Huabao8 was the most, the absorption of Tianyu4 was the least.