Effects of Biodegradable Chelating Agents on Ion Enrichment,Growth and Soil Properties of Robinia Pseudoacacia Under Pb and Cd Stress
The degradation chelating agent can increase the enrichment of heavy metals in plants.To study the effects of degradable chelating agents on the seedlings and soil properties of Robinia pseudoacacia under Pb and Cd stress,different concentrations of Nitrilotriacetic acid(NTA)and sodium fatty alcohol ethoxylate sulphate(AES)were added to Pb 600 mg·kg-1 and Cd 20 mg·kg-1 complex contaminated soils using R.pseudoacacia as test materials.The effects on the ion enrichment,growth characteristics and soil properties of R.pseudoacacia were determined.The results showed that NTA and AES promoted the accumulation of Pb and Cd ions in R.pseudoacacia root,and while high concentrations of AES and low concentrations of NTA promoted the accumulation of dry weight in R.pseudoacacia root.High concentrations of AES and low concentrations of NTA promoted the enrichment of Pb-Cd ions in the lower part of the R.pseudoacacia ground,and the transport rate of Pb-Cd ions by AES>NTA.NTA and AES chelating agents had no significant effect on the growth of R.pseudoacacia seedlings,but improved soil acid phosphatase activity,and the transport rate of Pb-Cd ions by AES>NTA.High concentration of AES had a good effect on the accumulation of biomass,the enrichment of Pb-Cd ions and the translocation of Pb-Cd ions to aboveground parts of R.pseudoacacia and has some reference value in the enhanced remediation of heavy metal contaminated soil in R.pseudoacacia.
Robinia pseudoacaciaChelating agentPb and Cd stressAESNTAIonen accumulationSoil characteristics
NETL
NSTL
万方数据
