蒽在我国典型水系沉积物中腐殖酸、腐殖质和黑碳上的吸附。
Phenanthrene sorption to humic acids, humin, and black carbon in sediments from typical water systems in China.
机构信息
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China.
出版信息
Environ Monit Assess. 2010 Jul;166(1-4):445-59. doi: 10.1007/s10661-009-1014-6. Epub 2009 May 28.
Humic acid (HA) and humin (HM) were extracted with 0.1 M NaOH and black carbon (BC) was isolated using a combustion method at 375 degrees C from six sediments in different areas in China and their sorption isotherms for phenanthrene (Phen) were determined. All sorption isotherms were nonlinear and fitted well with the Freundlich model. Among the SOM, HM and BC with more aromatic carbon controlled the sorption nonlinearity and capacity. Compared to HM, higher K (oc) values were observed for BC due to the combustion of organic matter and native sorbates in HM. For HAs isotherms, a positive relation was observed between the K (oc) values and aliphaticity or H/C ratios, but a negative relation was shown between the n values and polarity of HAs. HA, HM, and BC were responsible for 0.4-9.3%, 46-97%, and 65-96% of the total sorption, respectively, indicating the dominance of HM and BC fractions in overall sorption of Phen by the sediments.
腐殖酸（HA）和腐黑物（HM）分别用 0.1 M NaOH 提取，黑碳（BC）用 375°C 燃烧法从中国不同地区的 6 个沉积物中分离，并用它们来测定对菲（Phen）的吸附等温线。所有的吸附等温线均呈非线性，且与 Freundlich 模型拟合良好。在 SOM 中，HM 和 BC 中的芳香碳含量较高，控制了吸附的非线性和容量。与 HM 相比，BC 由于燃烧有机物质和天然吸附质，具有更高的 K（oc）值。对于 HAs 的等温线，K（oc）值与脂肪族或 H/C 比呈正相关，而与 HAs 的极性呈负相关。HA、HM 和 BC 分别占总吸附的 0.4-9.3%、46-97%和 65-96%，表明在沉积物对 Phen 的总吸附中，HM 和 BC 部分占主导地位。
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