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首页> 外文期刊>Environmental Monitoring and Assessment >Distribution and partition of polycyclic aromatic hydrocarbon in surface water of the Pearl River Estuary, South China
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Distribution and partition of polycyclic aromatic hydrocarbon in surface water of the Pearl River Estuary, South China

机译：华南珠江口地表水中多环芳烃的分布与分配

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摘要

Water samples were collected in the Pearl River Estuary in July 2002 and April 2003. The particulate and dissolved phase polycyclic aromatic hydrocarbons (PAHs) were determined. Total PAH concentrations in water samples were higher in April of 2003 (C_p: 4.0-39.1 ng/L or 445.1-1,089.9 ng/g; C_w: 15.9-184.2 ng/L) than in July of 2002 (C_p: 2.6-26.6 ng/L or 297.7-1,336.6 ng/g; C_w: 12.9-28.3 ng/L). It was found that 5, 6-ring PAHs enrich in the inner estuary samples and so did 3-ring PAHs in the July samples. Compositional differences in the suspended particulate matter (SPM) might be responsible for this observation. The partition coefficient (K_p) increased with the increasing of the particular organic carbon content of suspended particles as well as the salinity of water, decreased with the increase of the total suspended particles content of samples. A linear correlation between logK_(oc) and logK_(ow) was found in two sampling periods. The observed values of logK_(oc) exceed their predicted values derived form linear free energy relationship between logK_(oc) and logK_(ow) which could be attributed to the nonlinear sorption of soot-like carbons in suspended particles.
机译：2002年7月和2003年4月在珠江口收集了水样。确定了颗粒状和溶解相的多环芳烃（PAHs）。 2003年4月水样品中PAH的总浓度（C_p：4.0-39.1 ng / L或445.1-1,089.9 ng / g; C_w：15.9-184.2 ng / L）比2002年7月（C_p：2.6-26.6 ng）高/ L或297.7-1,336.6 ng / g； C_w：12.9-28.3 ng / L）。发现在河口内样品中有5个6环PAH，7月的样品中3个环PAH富集。悬浮颗粒物（SPM）的成分差异可能是造成这一现象的原因。分配系数（K_p）随悬浮颗粒中特定有机碳含量的增加以及水的盐度而增加，随样品总悬浮颗粒含量的增加而降低。在两个采样周期中发现logK_（oc）和logK_（ow）之间存在线性关系。 logK_（oc）的观测值超过了从logK_（oc）和logK_（ow）之间的线性自由能关系得出的预测值，这可以归因于悬浮颗粒中烟灰状碳的非线性吸附。

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