Reconstruction of pollution history of organic contaminants in the upper Gulf of Thailand by using sediment cores: First report from Tropical Asia Core (TACO) project
Reconstruction of pollution history of organic contaminants in the upper Gulf of Thailand by using sediment cores: First report from Tropical Asia Core (TACO) project
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DOI：
10.1016/j.marpolbul.2006.12.007
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发表时间：
2007-05-01
影响因子：
5.8
通讯作者：
Takada, Hideshige
中科院分区：
文献类型：
--
作者：
Boonyatumanond, Ruchaya;Wattayakorn, Gullaya;Takada, Hideshige
本文报道了第一次重建的污染历史，在热带亚洲的沉积物芯。四个沉积物芯样收集了在泰国湾上游的近海断面，并进行了有机微污染物的分析。通过测量137 Cs和地质年代学分子标记物（线性烷基苯，LAB和四丙烯型烷基苯，TABs）对岩芯进行了测年。多氯联苯（PCB）的浓度显示，在对应于1970年代的层的地下最大值，表明在泰国的多氯联苯的监管的有效性。LAB浓度随着时间的推移而增加，表明在过去30年中，流入海湾的污水增加。石油污染的生物标志物Hopanes也随着时间的推移而增加，表明自1950年代以来，由于泰国汽车数量的增加，来自汽车的碳氢化合物进入沿海地区的数量一直在增加。20世纪50年代和60年代，多环芳烃（PAHs）在相应的层中增加，可能是因为汽车来源的多环芳烃的输入增加。对应于20世纪70年代和以后的上层PAH浓度保持不变或增加。与工业化国家观察到的结果相比，地下最大的多环芳烃的情况。这是因为泰国经济在1960年代并不依赖煤炭作为能源，而且自1970年代以来一直持续增长。多环芳烃和藿烷类的沉积通量表现出显着的近海减少，而LABs是均匀的。(C)2007爱思唯尔有限公司保留所有权利。
This paper reports the first reconstruction of a pollution history in tropical Asia from sediment cores. Four sediment core samples were collected from an offshore transect in the upper Gulf of Thailand and were analyzed for organic micropollutants. The cores were dated by measurement of 137 Cs and geochronometric molecular markers (linear alkylbenzenes, LABs; and tetrapropylene-type alkylbenzenes, TABs). Polychlorinated biphenyl (PCB) concentrations showed a subsurface maximum in layers corresponding to the 1970s, indicating the effectiveness of regulation of PCBs in Thailand. LAB concentrations increased over time, indicating the increase in input of sewage into the Gulf during the last 30 years. Hopanes, biomarkers of petroleum pollution, also increased over time, indicating that the inputs of automobile-derived hydrocarbons to the coastal zone has been increasing owing to the increased number of cars in Thailand since the 1950s. Polycyclic aromatic hydrocarbons (PAHs) increased in the layers corresponding to the 1950s and 1960s, probably because of the increased inputs of automobile-de rived PAHs. PAH concentrations in the upper layers corresponding to the 1970s and later remained constant or increased. The absence of a subsurface maximum of PAHs contrasts with results observed in industrialized countries. This can be explained by the facts that the Thai economy did not depend on coal as an energy source in the 1960s and that economic growth has continued since the 1970s to the present. The deposition flux of PAHs and hopanes showed a dramatic offshore decrease, whereas that of LABs was uniform. (C) 2007 Elsevier Ltd. All rights reserved.