Urbaniak Magdalena, Wyrwicka Anna, Zieliński Marek, Mankiewicz-Boczek Joanna
European Regional Centre for Ecohydrology of the Polish Academy of Sciences, Tylna 3, 90-364, Lodz, Poland.
Department of Applied Ecology, Faculty of Biology and Environmental Protection, University of Lodz, Banacha 12/16, 90-237, Lodz, Poland.
Bull Environ Contam Toxicol. 2016 Sep;97(3):401-6. doi: 10.1007/s00128-016-1868-6. Epub 2016 Jun 30.
The current study evaluates the impact of sewage sludge and urban reservoir sediment on changes in total and Toxic Equivalency (TEQ) PCDD/PCDF concentration in soil and phytotoxicity measured using three test species: Lepidium sativum, Sinapis alba, and Sorghum saccharatum, during 5 weeks of Cucurbita pepo L. cv 'Atena Polka' (zucchini) cultivation. 'Atena Polka' was found to reduce total PCDD/PCDF concentration by 37 % in soil amended with sludge and 32 % in soil treated with sediment from an urban reservoir. The TEQ reduction was almost twofold greater: 68 % in soil amended with sludge and 52 % with urban sediment. Addition of sludge increased root growth inhibition of L. sativum, S. alba and S. saccharatum, from 44 % to 90 %. Observed inhibitions were, however, reduced by 'Atena Polka' cultivation, and as high as 32 % promotion in root length was noted. Amendment with urban sediment, in turn, resulted in an initial 1 %-36 % promotion of root growth, while 'Atena Polka' cultivation reduced this positive effect by inhibition as high as 26 %. Results demonstrated positive influence of 'Atena Polka' on the phytotoxicity alleviation and mitigation of total and TEQ PCDD/PCDF concentrations in soil treated with bio-solids from sewage sludge and an urban reservoir.
本研究评估了污水污泥和城市水库沉积物对土壤中多氯二苯并对二噁英/多氯二苯并呋喃（PCDD/PCDF）总量及毒性当量（TEQ）变化的影响，以及在5周的西葫芦品种“Atena Polka”（西葫芦）种植期间，使用三种受试物种：萝卜、白芥和甜高粱所测得的植物毒性。研究发现，“Atena Polka”能使添加污泥的土壤中PCDD/PCDF总量降低37%，使添加城市水库沉积物的土壤中该总量降低32%。TEQ的降低幅度几乎大一倍：在添加污泥的土壤中降低68%，在添加城市沉积物的土壤中降低52%。添加污泥会使萝卜、白芥和甜高粱的根生长抑制率从44%增至90%。然而，“Atena Polka”的种植降低了所观察到的抑制作用，且根长促进率高达32%。相反，添加城市沉积物最初会使根生长促进1% - 36%，而“Atena Polka”的种植会通过高达26%的抑制作用降低这种积极效果。结果表明，“Atena Polka”对减轻用污水污泥和城市水库生物固体处理过的土壤中的植物毒性以及多氯二苯并对二噁英/多氯二苯并呋喃总量和TEQ具有积极影响。
