School of Chemistry and Environment, South China Normal University, Guangzhou, Guangdong, 510006, China.
Institute of Environmental Sciences (CML), Leiden University, 2300 RA, Leiden, The Netherlands.
Environ Sci Pollut Res Int. 2018 Jan;25(3):2570-2579. doi: 10.1007/s11356-017-0627-5. Epub 2017 Nov 11.
In this study, soil culture experiments were conducted to explore the effects of biochar-supported Ni/Fe nanoparticles on the accumulation and translocation of polybrominated diphenyl ethers (PBDEs) in soil-plant system and its phytotoxicity to Brassica chinensis. Compared with those in BDE209 contaminated soils (S ) and Ni/Fe nanoparticle-treated soil (S ), the plant biomass, root, and shoot lengths in biochar-supported Ni/Fe nanoparticle-treated soil (S ) were increased by 23 mg, 1.35 cm, and 2.08 cm and 27.2 mg, 1.75 cm, and 2.52 cm, respectively, suggesting that the phytotoxicity in S treatment was significantly decreased. Moreover, in all treatments, the contents of BDE209, the total PBDEs, Ni, and Fe in sample plant tissues of S were the lowest. In addition, the superoxide dismutase, peroxidase, and catalase activities in S treatment were found to decrease by 33.8, 47.2, and 24.1%, respectively, compared to those in S . Results also showed that biochar addition not only reduced the uptake of PBDEs and heavy metals but also effectively improve soil fertility and reduce the leachability of Ni and Fe caused by Ni/Fe. Finally, the translocation factors (TFs) of PBDEs in four treatments followed the orders as S > S > S > S , indicating that biochar has an inhibition effects on PBDE translocation in the plants. In summary, all of the results suggested that the phytotoxicity, translocation of PBDEs, and the negative effects caused by neat Ni/Fe nanoparticles in B. chinensis were decreased as a result of the effects of the biochar.
在这项研究中，进行了土壤培养实验，以探讨生物炭负载的 Ni/Fe 纳米粒子对土壤-植物系统中多溴二苯醚（PBDEs）积累和迁移及其对油菜（Brassica chinensis）植物毒性的影响。与 BDE209 污染土壤（S）和 Ni/Fe 纳米颗粒处理土壤（S）相比，生物炭负载的 Ni/Fe 纳米颗粒处理土壤（S）中的植物生物量、根长和茎长分别增加了 23mg、1.35cm 和 2.08cm 和 27.2mg、1.75cm 和 2.52cm，表明 S 处理的植物毒性显著降低。此外，在所有处理中，S 中 BDE209、总 PBDEs、Ni 和 Fe 的含量最低。此外，与 S 相比，S 处理中的超氧化物歧化酶、过氧化物酶和过氧化氢酶活性分别降低了 33.8%、47.2%和 24.1%。结果还表明，生物炭的添加不仅减少了 PBDEs 和重金属的吸收，而且还有效地提高了土壤肥力，并降低了 Ni/Fe 引起的 Ni 和 Fe 的淋失性。最后，四种处理中 PBDEs 的迁移因子（TFs）的顺序为 S ＞S ＞S ＞S，表明生物炭对植物中 PBDEs 的迁移具有抑制作用。总之，所有结果表明，由于生物炭的作用，油菜中 PBDEs 的植物毒性、迁移以及 Ni/Fe 纳米粒子的不良影响均降低。
