Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, Guangzhou Key Laboratory of Environmental Exposure and Health, School of Environment, Jinan University, Guangzhou 510632, PR China.
Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, Guangzhou Key Laboratory of Environmental Exposure and Health, School of Environment, Jinan University, Guangzhou 510632, PR China.
Sci Total Environ. 2018 Feb 1;613-614:447-455. doi: 10.1016/j.scitotenv.2017.09.066. Epub 2017 Sep 14.
Pot experiments were conducted to investigate the uptake and translocation of both Cd and decabromodiphenyl ether (BDE-209) in Solanum nigrum, under the treatments of two arbuscular mycorrhizal fungi [AMF, Funneliformis mosseae (FM) and Rhizophagus intraradices (RI)] and surfactant β-cyclodextrin (β-CD). Results showed that S. nigrum treated with either FM or β-CD significantly elevated shoot biomass and Cd concentrations and contents in shoots. The concentrations of BDE-209 in shoots and the dissipation and debromination efficiencies of BDE-209 in soil were significantly enhanced in S. nigrum treated with β-CD, inoculated with or without AMF. Moreover, significant positive correlations were found between the BDE-209 dissipation efficiency, the BDE-209 concentrations and contents in roots, and the soil enzymatic activities (polyphenol oxidase or dehydrogenase activities) and between the Cd and BDE-209 contents in shoots or roots. Higher concentrations of lower-brominated products and total PBDEs were detected in shoots than in roots suggesting that BDE-209 might be initially absorbed by roots, then translocated to shoots, and then degraded into lower brominated products in shoots. Considering the plant uptake of Cd and BDE-209 and the efficient removal of those chemicals in soils, the combination of S. nigrum and β-CD inoculated with or without AMF may be viable alternatives for phytoremediation of the co-contaminated soil.
采用盆栽实验研究了丛枝菌根真菌（摩西管柄囊霉（FM）和内养根毛囊霉（RI））和表面活性剂β-环糊精（β-CD）处理下，龙葵对镉（Cd）和十溴联苯醚（BDE-209）的吸收和迁移。结果表明，FM 或 β-CD 处理显著提高了龙葵地上部生物量和 Cd 浓度及含量。与未接种 AMF 相比，β-CD 处理显著提高了 BDE-209 在龙葵地上部的浓度和土壤中 BDE-209 的消解和脱溴效率。此外，BDE-209 的消解效率、BDE-209 在根系中的浓度和含量以及土壤酶活性（多酚氧化酶或脱氢酶活性）与地上部或根系中 Cd 和 BDE-209 的浓度之间存在显著的正相关关系。地上部中检测到的低溴化产物和总 PBDEs 浓度高于根系，这表明 BDE-209 可能首先被根系吸收，然后迁移到地上部，然后在地上部降解为低溴化产物。考虑到 Cd 和 BDE-209 的植物吸收以及土壤中这些化学物质的有效去除，龙葵与接种或不接种 AMF 的 β-CD 的组合可能是受污染土壤植物修复的可行替代方案。
