Spatial distribution and deposition history of nonylphenol and bisphenol A in sediments from the Changjiang River (Yangtze River) Estuary and its adjacent East China Sea
Spatial distribution and deposition history of nonylphenol and bisphenol A in sediments from the Changjiang River (Yangtze River) Estuary and its adjacent East China Sea
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DOI：
10.1007/s13131-010-0062-7
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发表时间：
2010-09-01
影响因子：
1.4
通讯作者：
Pan Jinfen
中科院分区：
文献类型：
--
作者：
Bian Haiyan;Li Zhengyan;Pan Jinfen
壬基酚（NP）和双酚A（BPA）是内分泌干扰物，对多种生物体造成女性化和致癌等有害影响，因此它们在自然环境中的污染受到广泛关注。本研究基于长江口及其邻近东海的测年沉积岩芯，报告了表层沉积物中 NP 和 BPA 的分布特征及其沉积历史。表层沉积物中NP和BPA的含量范围分别为1.56-35.8和0.72-13.2 ng/g（干质量），其中长江口泥区和浙江沿海泥区这两个泥区的含量较高。浙江沿海泥浆带的高值表明这两种污染物可能通过长江沿岸羽流进行长距离迁移。含量与距污染源的距离不相关，表明颗粒沉降速率和沉积物粒径等其他因素对分布格局有明显影响。 1971 年至 2001 年沉积层的沉积物岩心中也检测到了 NP，其含量高达 20.9 ng/g（干质量）。 NP沉积通量在0.68～17.9 ng/(cm(2).a)之间变化，峰谷反映了中国过去三十年经济发展的历史痕迹。在1973年至2001年沉积的沉积层中检测到双酚A，含量高达3.66纳克/克。 BPA 的通量从 0.62 到 3.13 ng/(cm(2).a) 变化，显示出与 NP 类似的模式。 NP和BPA的含量也表明了研究区底栖生物的潜在风险。
Nonylphenol (NP) and bisphenol A (BPA) are endocrine disruptors causing harmful effects including feminization and carcinogenesis to various organisms, and consequently, their contamination in natural environment has received wide concerns. This study reports the distribution characteristics of NP and BPA in surface sediments and their deposition history based on a dated sediment core in the Changjiang River (Yangtze River) Estuary and its adjacent East China Sea. The contents of NP and BPA in surface sediments ranged from 1.56-35.8 and 0.72-13.2 ng/g (dry mass), respectively, with high values recorded in the two mud zones, the Changjiang River Estuarine Mud Zone and the Zhejiang Coastal Mud Zone. High values in the Zhejiang Coastal Mud Zone suggest the possibility of long distance transport of both contaminants through the Changjiang riverine plume. The contents were not correlated with the distance from the pollution source, indicating other factors including particle deposition rate and sediment grain size obviously affecting the distribution pattern. NP was also detected in a sediment core at layers deposited from the year of 1971 to 2001 with contents of up to 20.9 ng/g (dry mass). The deposition fluxes of NP varied from 0.68 to 17.9 ng/(cm(2).a) with peaks and valleys reflecting the traces of economic development history in China during the previous three decades. BPA was detected at sediment layers deposited from 1973 to 2001 with contents of up to 3.66 ng/g. The fluxes of BPA varied from 0.62 to 3.13 ng/(cm(2).a) showing a similar pattern as NP. The contents of NP and BPA also indicated potential risks on benthic organisms in the study area.