Key Laboratory of Production Environment and Agro-product Safety, Institute of Agro-Environmental Protection, Ministry of Agriculture, Tianjin 300191, China.
J Environ Manage. 2013 Jan 15;114:202-8. doi: 10.1016/j.jenvman.2012.09.018. Epub 2012 Dec 6.
The present study was conducted to investigate the effectiveness of GA(3) and Tween-80 on enhancing the phytoremediation of Cd-B[a]P co-contaminated soils. Results showed that the addition of GA(3) and GA(3)-Tween-80 enhanced Tagetes patula growth by 14%-32% and 23%-55%, respectively, relative to the control group. However, under independent GA(3)-treated soils, Cd and B[a]P concentrations in the shoots of the plants decreased by 15%-33% and 15%-53%, respectively, compared with CK. By contrast, the shoot concentration and accumulation of Cd under GA(3)-Tween-80 treatment increased by 0.01-0.46 and 1.33-1.55 times, respectively, whereas those of B[a]P increased from 0.57 to 0.82, and 1.33 to 1.55 times, respectively, compared with those of the control. Optimal result for Cd phytoextraction was obtained under combined 5 mmol Tween-80 kg(-1) and 1 mmol GA(3) kg(-1) treatment, and the maximum removal rate of B[a]P was obtained after the application of 5 mmol Tween-80 kg(-1) and 5 mmol GA(3) kg(-1).
本研究旨在探讨 GA(3)和吐温-80 对增强 Cd-B[a]P 复合污染土壤植物修复的效果。结果表明，与对照组相比，GA(3)和 GA(3)-吐温-80 的添加分别使万寿菊的生长提高了 14%-32%和 23%-55%。然而，在单独添加 GA(3)的土壤中，与 CK 相比，植物地上部分的 Cd 和 B[a]P 浓度分别降低了 15%-33%和 15%-53%。相比之下，GA(3)-吐温-80 处理下 Cd 在地上部分的浓度和积累分别增加了 0.01-0.46 和 1.33-1.55 倍，而 B[a]P 的浓度和积累分别从 0.57 增加到 0.82 和 1.33-1.55 倍，与对照组相比。在 5 mmol Tween-80 kg(-1)和 1 mmol GA(3) kg(-1)联合处理下，Cd 的植物提取效果最佳，在添加 5 mmol Tween-80 kg(-1)和 5 mmol GA(3) kg(-1)后，B[a]P 的最大去除率最高。
