State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Bull Environ Contam Toxicol. 2021 Jan;106(1):190-197. doi: 10.1007/s00128-020-02847-4. Epub 2020 Apr 18.
Polycyclic aromatic hydrocarbons (PAHs) pose great risks to lake ecosystem and human health. Comprehensive knowledge on PAHs in lakes is critical for their risk control. 118 samples were collected from different environmental medium to study the occurrence and fluxes of 16 PAH in Lake Taihu. The average ∑PAH in air, water, phytoplankton, zooplankton, suspended particle matter, and surface sediments were 122 ng m, 61.3 ng L, 6500 ng g, 4940 ng g, 27,900 ng g, and 522 ng g, respectively. Sediments were contaminated by PAHs from pyrogenic sources. The average fluxes of air-water, dry deposition, and sinking of the 16 individual PAHs were 2900, 300, and 251 ng m d. In the air-water column-surface sediments system, air-water exchange was the main transport pathway. In order to ensure safety of drinking water resources for local residence, the governments are suggested to work together to reduce PAHs emission and implement new energy policy.
多环芳烃（PAHs）对湖泊生态系统和人类健康构成巨大威胁。全面了解湖泊中的 PAHs 对于控制其风险至关重要。本研究从不同环境介质中采集了 118 个样本，以研究太湖中 16 种 PAH 的分布和通量。空气中、水中、浮游植物、浮游动物、悬浮颗粒物和表层沉积物中∑PAH 的平均值分别为 122ng/m、61.3ng/L、6500ng/g、4940ng/g、27900ng/g 和 522ng/g。沉积物受到了源自燃烧源的 PAHs 污染。16 种单体 PAH 的空气-水交换、干沉降和沉降通量平均值分别为 2900ng/m/d、300ng/m/d 和 251ng/m/d。在大气-水柱-表层沉积物系统中，空气-水交换是主要的迁移途径。为了确保当地居民饮用水资源的安全，建议政府共同努力减少 PAHs 的排放并实施新能源政策。
