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| Phytoremediation of 4 phthalic acid esters in contaminated soil by beet-grass system |
| Received:November 23, 2015 |
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| KeyWord:phthalic acid esters(PAEs);phytoremediation;soil;plant intercropping |
| Author Name | Affiliation | E-mail | | WEI Li-qiong | College of Natural Resources and Environment, North West A&F University, Yangling 712100, China | | | HU Shi-bin | College of Natural Resources and Environment, North West A&F University, Yangling 712100, China | 1326801980@qq.com | | WANG Jiao-jiao | College of Natural Resources and Environment, North West A&F University, Yangling 712100, China | | | CHAI Qin-qin | College of Natural Resources and Environment, North West A&F University, Yangling 712100, China | | | LIU Jin-bo | College of Natural Resources and Environment, North West A&F University, Yangling 712100, China | | | WANG Meng-ke | College of Natural Resources and Environment, North West A&F University, Yangling 712100, China | | | SHI Chao | College of Natural Resources and Environment, North West A&F University, Yangling 712100, China | |
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| Abstract: |
| A pot experiment was conducted to study the phytoremediation of 4 phthalic acid esters(DEP, DBP, BBP and DEHP) by different planting patterns with beet and 3 grasses(ryegrass, sudangrass and alfalfa) in contaminated soil. Greater reduction of phthalic acid esters was observed in treatments with plants than without plants, and in intercropping than monoculture. Alfalfa monoculture and intercropping both had better remediation effects than other plants did. Beet/alfalfa intercropping removed over 65% of PAEs. Intercropping enhanced the activities of catalase and phosphatase in soil, thus promoting the degradation of PAEs. In both soil and the shoots of the tested plants, DEHP and DBP had much higher concentrations than the other PAEs studied did. Their removal efficiencies were also higher, with DEHP greater than 50% and DBP over 40%. Bioconcentration factor(BCF) of DEHP was significantly low in the shoots of the tested plants, while that of DBP and BBP was high. Alfalfa could be used as a phytoremediator of phthalic acid esters in soil. Plant intercropping would provide greater remediation efficiency than monoculture. |
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