Oleszczuk Patryk, Baran Stanislaw
Institute of Soil Science and Environmental Management, Agriculture University, Poland.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2004;39(11-12):2799-815.
The present study evaluates the content of the mild-solvent extracted fraction of the polycyclic aromatic hydrocarbons. Ten compounds from the US EPA list (phenanthrene, anthracene, fluoranthene, pyrene, benzo[a]anthracene, chryzene, benzo[b]fluoranthene, benzo[a]pyrene, benzo[ghi]perylene oraz indeno[1,2,3-cd]pyrene) were chosen. The compounds were extracted with n-butanol from 11 sewage sludges that differed both in the total PAH content and in their physicochemical properties. On the basis of the results obtained, the influence of the properties of the PAH and some properties of selected sludge on the content of the mild-solvent extracted fractions of these compounds was determined. The content of the fraction extracted with n-butanol within the total of 10 PAHs ranged from 12.5 to 83.2% (mean 40.1%) depending on the type of sludge. Similarly, as in the case of the total of the 10 PAHs, significant differences in the content of PAHs extracted with n-butanol were also noted for the individual compounds studied. In the case of most individual PAHs their mean share did not differ statistically in relation to the PAH type and was close to 40%. An evaluation of the relation between the share of the fraction extracted with n-butanol from the different types of sludge and the properties of the PAHs showed that statistically, there existed significant (P < 0.05) correlations between log Koc (in the case of one sewage sludge) and between the nitrogen content, the ratio of C/N, cations Mg2+ and K+ (in the case of a few PAHs). A clear and significant relation was found between the content of and the share of the fraction of n-butanol extracted and the PAH fraction present in the sewage sludge pore water (determined on the basis of an equilibrium partition model).
本研究评估了多环芳烃的轻度溶剂萃取馏分的含量。从美国环境保护局（US EPA）清单中选取了10种化合物（菲、蒽、荧蒽、芘、苯并[a]蒽、屈、苯并[b]荧蒽、苯并[a]芘、苯并[ghi]苝以及茚并[1,2,3-cd]芘）。用正丁醇从11种污水污泥中萃取这些化合物，这些污泥的总多环芳烃含量及其理化性质均有所不同。根据所得结果，确定了多环芳烃的性质以及所选污泥的一些性质对这些化合物轻度溶剂萃取馏分含量的影响。根据污泥类型，正丁醇萃取的馏分在10种多环芳烃总量中的含量范围为12.5%至83.2%（平均40.1%）。同样，与10种多环芳烃总量的情况一样，在所研究的单个化合物中，用正丁醇萃取的多环芳烃含量也存在显著差异。对于大多数单个多环芳烃而言，其平均占比在统计学上与多环芳烃类型无关，且接近40%。对从不同类型污泥中用正丁醇萃取的馏分占比与多环芳烃性质之间的关系进行评估表明，在统计学上，log Koc（在一种污水污泥的情况下）以及氮含量、C/N比、阳离子Mg2+和K+（在几种多环芳烃的情况下）之间存在显著（P < 0.05）相关性。在污水污泥孔隙水中的多环芳烃馏分含量与正丁醇萃取馏分的占比之间发现了明显且显著的关系（基于平衡分配模型确定）。
