通过分析采集的土壤、沉积物和大气样品，对拉萨郊区的拉鲁湿地多环芳烃污染及其来源进行了初步研究。湿地表层土壤中16种多环芳烃的平均含量的总含量为82.45×10-9，既存在低环数的多环芳烃，又含有高环数的多环芳烃；湿地土壤中的多环芳烃主要来自于大气。

The coastal region off Macao is a known depositional zone for persistent organic pollutants (POPs) in the Pearl River Delta and Estuary of southern China and an important gateway for the regional contributions of contamination to the globe. This paper presents a comprehensive assessment of the input sources and transport pathways of polycyclic aromatic hydrocarbons (PAHs) found in the coastal sediments of Macao, based on measurements of 48 2-7 ring PAHs and 7 sulfur/oxygenated (S/O) PAH derivatives in 45 sediment, 13 street dust, and 68 aerosol samples. Total sediment PAHs concentrations ranged from 294 to 12 741ng/g, categorized as moderate contamination compared to other regions of Asia and the world. In addition, the PAH compounds appeared to be bound more strongly to aromatics-rich soot particles than to natural organic matter, implying a prevailing atmospheric transport route for PAHs to Macao's coast. Compositional analysis and principal component analysis (PCA) suggested that different classes of PAHs in the coastal sediments of Macao may have been derived from different input sources via various transport pathways. For example, alkylated and S/O PAHs were likely derived from fossil fuel leakage and transported to sediments by both aerosols particles and street runoff. High-molecular-weight parent PAHs were predominantly originated from automobile exhausts and distributed by direct and indirect atmospheric deposition. Lowmolecularweight parent PAHs, on the other hand, may have stemmed from lower temperature combustion and fossil fuel (such as diesel) spillage from ships and boats and were transported to sediments by river runoff or direct discharge as well as by air-water exchange.

对2002年5月采集的西藏错鄂湖和羊卓雍湖的水和沉积物样品进行了实验及分析。结果表明，这2个高原湖泊均不同程度地受到有机氯农药的污染，并具有多种有机氯农药的同时存在、在沉积柱上近表层没有含量下降趋势以及南部的羊卓雍湖污染程度高于藏北的错鄂湖等特点，反映出湖泊中的有机氯农药有可能是随孟加拉湾洋暖流由南向北带入的。两个湖泊的水与沉积物中滴滴涕（DDTs）和六六六（HCHs）含量甚至与我国东部地区的一些淡水水体相近，这种现象很可能表明，大气沉降的有机氯农药可在青藏高原湖泊水体与沉积物中发生一定程度的累积。长远地看，这一过程将可能对青藏高原野生动物产生负面影响。

以广州麓湖为小型城市湖泊的代表，对大气中多环芳烃的颗粒态沉降进行了连续一年的采样与分析。结果表明，年均颗粒态多环芳烃的沉降通量为0.47mg/（m2•a）。全年直接由大气输入到麓湖的颗粒态多环芳烃总量约为0.1kg。不同季节相比，夏季多环芳烃的沉降通量略高于秋季，而冬春季最高。对比大气总悬浮颗粒物中多环芳烃的组成发现，当降雨量增大时，沉降颗粒物中多环芳烃的组成逐渐趋近于大气总悬浮物中多环芳烃的组成。广州地区雨热同期、干冷咸至的季风气候特点，以及由此导致的大气颗粒物粒径变化和PAHs的气-粒分配变化，与大气PAHs污染程度一起，共同控制着沉降颗粒物中PAHs相对组成的季节变化。

对拉萨城区大气及郊区湿地土壤中多环芳烃的研究表明，大气中的多环芳烃，颗粒物占27.69%，气相状态占72.31%；由于高原高强度的紫外线辐射，无论是颗粒相还是气相状态存在的多环芳烃含量均是夜晚高于白天；颗粒物中的多环芳烃主要为3个苯环数以上的，而气相状态的多环芳烃多为2和3个苯环数的芳烃及芘。湿地土壤中的多环芳烃主要来自于大气，其中气相状态占52.56%，颗粒物占47.44%。