施用污水污泥和污水污泥衍生生物炭改良污染土壤后，生菜对多环芳烃的生物积累减少。
Reduced bioaccumulation of PAHs by Lactuca satuva L. grown in contaminated soil amended with sewage sludge and sewage sludge derived biochar.
机构信息
Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China.
出版信息
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。
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