[Objective] The remediation effect of the plant to Cd-contaminated soil was studied. [Method] By taking simulation test and field test, the ryegrass （Lolium perenne L.） was planted, and the remediation effect of the...[Objective] The remediation effect of the plant to Cd-contaminated soil was studied. [Method] By taking simulation test and field test, the ryegrass （Lolium perenne L.） was planted, and the remediation effect of the plant to contaminated sites was studied. [Result] The ryegrass was planted in the eluotropic soil for 0-60 d, Cd content in the soil showed a rapid decreasing trend; after 60 d, the enrich- ment ability of the plant to Cd gradually weakened over time; after 75 d of phytore- mediation, the Cd content in the soil decreased greatly, and the remediation effi- ciency was 90.66%. [Conclusion] Ryegrass remediation technology had good reme- diation effect to Cd-contaminated soil.展开更多
Phytoremediation is a relatively new approach in remediating ecosystems contaminated by ecotoxic pollutants such as herbicides or heavy metals and especially cadmium （Cd）. Certain indicators of phytoremediation, as ...Phytoremediation is a relatively new approach in remediating ecosystems contaminated by ecotoxic pollutants such as herbicides or heavy metals and especially cadmium （Cd）. Certain indicators of phytoremediation, as plant growth, tolerance to Cd, and uptake, transfer factor （TF） and percent removal of Cd, were studied for 11 crops and 8 weed species in soil with varying levels of Cd （0-240 mg Cd kg＂ soil） under controlled environment. Cadmium accumulated mainly in roots （51%-86%, depending on the species）, while a 14%-49% was transferred to shoots （except for four species） the concentration being positively related to Cd level in soil. Highest concentration in the above ground plant part was measured in sugarbeets （41-101 mg Cd kg-1 DW） followed by Bromus sterilis （75）, Eruca sativa （32-82）, Cichorium intibus （35-80）, and maize （60 mg Cd kgl）. Based on the results it is concluded that sugarbeets, maize, C. intibus, B. sterilis, E. sativa, Apium graveolens, and Vicia sativa seem to have a potential in remediating Cd contaminated soils.展开更多
[Objective] The aim was to research phytoremediation effects on soils with combined pollution. [Method] With simulation experiment, the test selected plants suitable for phytoremediation in soils polluted with Pb-Cd, ...[Objective] The aim was to research phytoremediation effects on soils with combined pollution. [Method] With simulation experiment, the test selected plants suitable for phytoremediation in soils polluted with Pb-Cd, PAHs, and Pb-Cd-PAHs,respectively and ryegrass was grown to explore phytoremediation on contaminated sites by adjusting bio-availability. [Result] After 70 d growing of ryegrass, the content of available Pb in contaminated soils was 375.26 mg/kg, the content of Cd was 4.9mg/kg after 90 d, and the content of B [a]P was 0.60 mg/kg after 100 d, which were all lower compared with soil limits. [Conclusion] Ryegrass is a suitable plant for phytoremediation.展开更多
基金Supported by the Prospective Research Project of Industry-University-Research Cooperation in Jiangsu Province(BY2014037-21)~~
文摘[Objective] The remediation effect of the plant to Cd-contaminated soil was studied. [Method] By taking simulation test and field test, the ryegrass （Lolium perenne L.） was planted, and the remediation effect of the plant to contaminated sites was studied. [Result] The ryegrass was planted in the eluotropic soil for 0-60 d, Cd content in the soil showed a rapid decreasing trend; after 60 d, the enrich- ment ability of the plant to Cd gradually weakened over time; after 75 d of phytore- mediation, the Cd content in the soil decreased greatly, and the remediation effi- ciency was 90.66%. [Conclusion] Ryegrass remediation technology had good reme- diation effect to Cd-contaminated soil.
文摘Phytoremediation is a relatively new approach in remediating ecosystems contaminated by ecotoxic pollutants such as herbicides or heavy metals and especially cadmium （Cd）. Certain indicators of phytoremediation, as plant growth, tolerance to Cd, and uptake, transfer factor （TF） and percent removal of Cd, were studied for 11 crops and 8 weed species in soil with varying levels of Cd （0-240 mg Cd kg＂ soil） under controlled environment. Cadmium accumulated mainly in roots （51%-86%, depending on the species）, while a 14%-49% was transferred to shoots （except for four species） the concentration being positively related to Cd level in soil. Highest concentration in the above ground plant part was measured in sugarbeets （41-101 mg Cd kg-1 DW） followed by Bromus sterilis （75）, Eruca sativa （32-82）, Cichorium intibus （35-80）, and maize （60 mg Cd kgl）. Based on the results it is concluded that sugarbeets, maize, C. intibus, B. sterilis, E. sativa, Apium graveolens, and Vicia sativa seem to have a potential in remediating Cd contaminated soils.
基金Supported by Unified Research with Industry-University-Research Cooperation(BY2014037-21)~~
文摘[Objective] The aim was to research phytoremediation effects on soils with combined pollution. [Method] With simulation experiment, the test selected plants suitable for phytoremediation in soils polluted with Pb-Cd, PAHs, and Pb-Cd-PAHs,respectively and ryegrass was grown to explore phytoremediation on contaminated sites by adjusting bio-availability. [Result] After 70 d growing of ryegrass, the content of available Pb in contaminated soils was 375.26 mg/kg, the content of Cd was 4.9mg/kg after 90 d, and the content of B [a]P was 0.60 mg/kg after 100 d, which were all lower compared with soil limits. [Conclusion] Ryegrass is a suitable plant for phytoremediation.
