土霉素、镉复合污染土壤的植物-微生物强化修复效果

Effect of Plant-Microbe Intensified Remediation of Soil Polluted With Oxytetracycline and Cadmium

  • 摘要: 选用观赏性植物孔雀草(Tagetes patula)作为修复植物,对土霉素有良好降解效果的细菌(Phyllobacterium myrsinacearum)和真菌(Rhodotorula mucilaginosa)的混合菌液作为降解微生物,并辅以肥料(硫酸铵、磷酸二氢钙、氯化钾),有机酸(酒石酸、草酸、柠檬酸)和化学螯合剂(NTA和EDTA)8种强化处理,对土霉素-镉复合污染土壤进行植物微生物联合强化修复研究。结果表明,孔雀草对土壤中镉的富集量从大到小依次为硫酸铵≈氯化钾 >EDTA >酒石酸 >草酸 >磷酸二氢钙 >NTA >柠檬酸 >对照。肥料处理对于降解菌降解土霉素的效果最好,其次是有机酸处理,螯合剂处理降解效果较差。综合而言,硫酸铵肥料对镉的富集和土霉素的降解效果最佳。

     

    Abstract: A soil remediation experiment was carried out with maidenhair (Tagetes patula)as phyto-remedifier, bacteria (phyllobacterium myrsinacearum)-fungi (Rhodotorula mucilaginosa) mixture solution as bacto-remedifier, and fertilizers (ammonia sulfate, calcium biphosphate and potassium chloride), organic acids (tartaric acid, oxalic acid, and citric acid) and chelating agents ( NTA and EDTA) as eight separate intensifiers, to treat a soil polluted with cadmium (Cd) and oxytetracycline together. In terms of the effect of intersifying Tagetes patula's enrichment of Cd, the eight intensifiers displayed a decreasing order of ammonia sulfate≈potassium chloride> EDTA> tartaric acid> oxalic acid> calcium biphosphate >NTA> citric acid >control, while in terms of the effect of intensifying degradation of oxytetracycline, fertilizers were on the top, followed by organic acids and wound up by chelating agents. And among the fertilizers, ammonia sulfate was the most effective in remedying Cd and oxytetracycline polluted soils.

     

/

返回文章
返回