利用能源作物（蓖麻）进行柠檬酸辅助的重金属植物提取
Use of Energy Crop (Ricinus communis L.) for Phytoextraction of Heavy Metals Assisted with Citric Acid.
作者信息
Zhang Hui, Chen Xueping, He Chiquan, Liang Xia, Oh Kokyo, Liu Xiaoyan, Lei Yanru
机构信息
a School of Environmental and Chemical Engineering, Shanghai University , Shanghai , PR China.
出版信息
Int J Phytoremediation. 2015;17(7):632-9. doi: 10.1080/15226514.2014.935287.
Ricinus communis L. is a bioenergetic crop with high-biomass production and tolerance to cadmium (Cd) and lead (Pb), thus, the plant is a candidate crop for phytoremediation. Pot experiments were performed to study the effects of citric acid in enhancing phytoextraction of Cd/Pb by Ricinus communis L. Citric acid increased Cd and Pb contents in plant shoots in all treatments by about 78% and 18-45%, respectively, at the dosage of 10 mM kg(-1) soil without affecting aboveground biomass production. Addition of citric acid reduced CEC, weakened soil adsorption of heavy metals and activated Cd and Pb in soil solutions. The acid-exchangeable fraction (BCR-1) of Pb remained lower than 7% and significantly increased with citric acid amendment. Respective increases in soil evaluation index induces by 14% and 19% under the Cd1Pb50 and Cd1Pb250 treatments upon addition of citric acid resulted in soil quality improvement. Ricinus communis L. has great potential in citric acid-assisted phytoextraction for Cd and Pb remediation.
蓖麻是一种具有高生物量产量且对镉（Cd）和铅（Pb）具有耐受性的生物能源作物，因此，该植物是植物修复的候选作物。进行盆栽试验以研究柠檬酸对增强蓖麻对Cd/Pb的植物提取作用的影响。在土壤中添加10 mM kg(-1)的柠檬酸时，所有处理中植物地上部的Cd和Pb含量分别增加了约78%和18 - 45%，且不影响地上部生物量的生产。添加柠檬酸降低了阳离子交换量（CEC），减弱了土壤对重金属的吸附，并活化了土壤溶液中的Cd和Pb。Pb的酸可交换态（BCR-1）含量仍低于7%，但随着柠檬酸的添加显著增加。在Cd1Pb50和Cd1Pb250处理下，添加柠檬酸后土壤评价指数分别提高了14%和19%，从而改善了土壤质量。蓖麻在柠檬酸辅助植物提取修复Cd和Pb方面具有巨大潜力。
Zotero 插件