Phytoremediation experiments at a former uranium mining site, and subsequent utilization of the plant residue
Large sites with slight contamination of heavy metals including radionuclides (HM/R) were in the past a problem for remediation measures-the traditional processes are too expensive for an application on such large sites. Phytoremediation can be an alternative for such areas with slight contaminations. The investigated field site is a former uranium mining area in East Germany. The remediation of this site slightly to moderately contaminated with HM/R was investigated in a joint project by combination of phytostabilization and phytoextraction methods combining microbial, soil and plant techniques both at the field- and the lab scale, and concepts were developed for the subsequent utilization of the HM/R-loaded plant residues. Plant experiments with Triticale, Helianthus annum and Brassica juncea were performed revealing the influence of biological additives ( fungi, bacteria) and soil amendment strategies ( increasing pH and organic matter, fertilizing) on biomass production and plant tolerance to heavy metals. In lysimeter experiments it was figured out, that the different soil improvement strategies resulted in a reduction of the concentration of contaminants in the seepage waters, as well as of seepage water rates and loads. After the harvest of the metal loaded plants, experiments for utilization and disposal of the plant material were carried out.
phytoremediation uranium heavy metals seepage water load off-product utilization
S.Willscher D. Mirgorodsky L Jablonski D. Ollivier D. Merten G. Biichel J. Wittig P. Werner
Institute of Waste Management and Contaminated Site Treatment,Technical University Dresden, Pratzsch Institute of Earth Sciences, Friedrich-Schiller University, Burgweg 11, 07749, Jena, Germany
国际会议
The 19th International Biohydrometallurgy Symposium(第19届国际生物湿法冶金大会 IBS2011)
长沙
英文
1073-1077
2011-09-18（万方平台首次上网日期，不代表论文的发表时间）