a College of Geography and Environment , Shandong Normal University , Jinan , Shandong , China.
Int J Phytoremediation. 2019;21(7):634-642. doi: 10.1080/15226514.2018.1556581. Epub 2019 Jan 18.
Little is known about the effect of modified carbon black nanoparticles (MNCB) on the availability of heavy metals and petroleum degradation in petroleum and heavy metals co-contaminated soils. The overall objective of this study was to investigate the simultaneous effect of MNCB on heavy metal immobilization and petroleum biodegradation in co-contaminated soil in plant and plant-microbe combined remediation. The results showed that the petroleum degradation increased by 50% in petroleum-Cd co-contaminated soil and 65% in petroleum-Ni co-contaminated soil in plant-microbe combined remediation, comparing with the plant remediation and the application of MNCB did not show significant improvement on petroleum degradation in both plant and plant-microbe combined remediation. MNCB could significantly reduce the availability of heavy metals in soil and the uptakes of Cd and Ni by Suaeda salsa by roughly 18 and 10% and improve the growth of plant by alleviating the growth inhibition caused by heavy metals. The application of Bacillus subtilis and Sphingobacterium multivorum (heavy metal tolerant bacteria) inhibited the biomass of Suaeda salsa by enhancing the petroleum degradation. It could be concluded that MNCB played a major role in immobilizing the heavy metals and bacteria dominated the petroleum degradation in petroleum-metal co-contaminated soil.
关于改性炭黑纳米颗粒（MNCB）对石油和重金属污染土壤中重金属的有效性和石油降解的影响知之甚少。本研究的总体目标是研究 MNCB 在植物和植物-微生物联合修复中对重金属固定和石油生物降解的协同作用。结果表明，与植物修复相比，在植物-微生物联合修复中，石油-Cd 污染土壤中石油的降解增加了 50%，石油-Ni 污染土壤中石油的降解增加了 65%，而 MNCB 的应用并没有显著提高石油在植物和植物-微生物联合修复中的降解。MNCB 可显著降低土壤中重金属的有效性和盐地碱蓬对 Cd 和 Ni 的吸收，分别降低约 18%和 10%，并通过缓解重金属引起的生长抑制作用来促进植物的生长。枯草芽孢杆菌和鞘氨醇单胞菌（重金属耐受菌）的应用通过增强石油降解来抑制盐地碱蓬的生物量。可以得出结论，在石油-金属污染土壤中，MNCB 主要起固定重金属的作用，而细菌则主导石油的降解。
