Polycyclic aromatic hydrocarbons (PAHs) were analyzed for surface sediments and a sediment core from the Yellow River-dominated margin. The concentration of 16 USEPA priority PAHs in surface sediments ranged from 5.6 to 175.4 ng g−1 dry weight sediment (dws) with a mean of 49.1 ng g−1 dws. From 1930 to 2011, the distribution of PAHs (37.2 to 210.6 ng g−1 dws) was consistent with the socioeconomic development of China. The PAHs' concentration peaked in 1964 and 1986, corresponding to the rapid economic growth in China (1958–1965) and the initiation of the “Reform and Open” policy in 1978, respectively. The applications of molecular diagnostic ratios and principal component analysis suggest that PAHs are predominantly produced by the coal and biomass combustion, whereas the contribution of petroleum combustions slightly increased after the 1970s, synchronous with an increasing usage of oil and gas in China.
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机译：分析了多环芳烃（PAHs）的表面沉积物和黄河支配边缘的沉积物芯。表层沉积物中16种USEPA优先PAHs的浓度范围为5.6至175.4 ng）g -1 干重沉积物（dws），平均为49.1 ng g -1 dws。从1930年到2011年，PAHs的分布（37.2至210.6ngngg -1 dws）与中国的社会经济发展相一致。 PAHs的集中度在1964年和1986年达到顶峰，分别对应于中国经济的快速增长（1958年至1965年）和1978年实施的“改革开放”政策。分子诊断率和主成分分析的应用表明，多环芳烃主要由煤和生物质燃烧产生，而1970年代后石油燃烧的贡献略有增加，与此同时，中国对石油和天然气的使用也在增加。
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