Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China.
Environ Pollut. 2013 Apr;175:64-8. doi: 10.1016/j.envpol.2012.12.014. Epub 2013 Jan 19.
The influence of sewage sludge (SS) and sewage sludge biochar (SSBC) upon biomass yield and the bioaccumulation of PAHs into lettuce plants grown in contaminated soil (∑16PAH 20.2 ± 0.9 mg kg(-1)) is presented. All SSBC amendments (2, 5 and 10%) and the 2% SS amendment significantly (P < 0.01) increased lettuce biomass. Both SS and SSBC amendments significantly reduced (P < 0.01) the bioaccumulation of PAHs at all application levels; with reduction in ∑16PAH concentration ranging between 41.8 and 60.3% in SS amended treatments and between 58.0 and 63.2% in SSBC amended treatments, with respect to the control. Benefits in terms of biomass production and PAHs bioaccumulation reduction were greatest where SSBC was used as a soil amendment. At high application rates (10%) SSBC reduced bioaccumulation of PAHs by between 56% and 67%, while SS reduced bioaccumulation of PAHs by less than 44%.
本研究探讨了污水污泥（SS）和污水污泥生物炭（SSBC）对受污染土壤中生物量产量和多环芳烃（PAHs）生物累积的影响（∑16PAH 20.2 ± 0.9 mg kg(-1))。所有 SSBC 改良剂（2%、5%和 10%）和 2% SS 改良剂均显著（P < 0.01）增加了生菜的生物量。SS 和 SSBC 改良剂均显著降低（P < 0.01）了所有施用量下 PAHs 的生物累积；在 SS 改良处理中，∑16PAH 浓度降低了 41.8%至 60.3%，在 SSBC 改良处理中降低了 58.0%至 63.2%，与对照相比。在 SSBC 作为土壤改良剂的情况下，生物量生产和 PAHs 生物累积减少方面的效益最大。在高施用量（10%）下，SSBC 降低了 56%至 67%的 PAHs 生物累积，而 SS 降低了不到 44%的 PAHs 生物累积。
