The sedimentary history of polycyclic aromatic hydrocarbons (PAHs) and organochlorine pesticides (OCPs) over the past 140 years in a lake sediment core from Huixian karst wetland was reconstructed. The total PAHs and OCPs concentrations ranged from 40.0 to 210 ng g⁻¹ and 0.98 to 31.4 ng g⁻¹, respectively. The vertical distribution of PAHs and OCPs in different stages was great consistent with the history of regional socio-economic development and the usage of OCPs. As the indicators of socio-economic development, gross domestic product (GDP), population, energy consumption, highway mileage, and private vehicles correlated with the PAHs concentrations, indicating the impact of human activities on PAHs levels. The PAHs and OCPs concentrations were also affected by environmental changes in the wetland, as reconstructed by total organic carbon (TOC), sand, silt, clay, quartz, and calcite in sediments. Redundancy analysis (RDA) results showed TOC was the dominant factor to explain the concentrations of PAHs and OCPs with the explanation of 86.7% and 43.5%, respectively. In addition, TOC content had significantly positive correlation with PAHs (0.96, p < 0.01) and OCPs (0.78, p < 0.01). In particular, the significantly positive correlation (p < 0.05) between calcite and PAHs and OCPs inferred that karstification might play an important role in the migration of PAHs and OCPs in the karst area. Therefore, the lake in Huixian wetland tended to be a sink more than a source of PAHs and OCPs influenced by the increasing TOC content and karstification under climate warming.

重建了辉县岩溶湿地湖泊沉积岩芯中多环芳烃（PAHs）和有机氯农药（OCPs）140年的沉积历史。PAH 和 OCP 的总浓度范围为 40.0 至 210 ng g ^-1和 0.98 至 31.4 ng g ^-1， 分别。PAHs和OCPs在不同阶段的垂直分布与区域社会经济发展的历史和OCPs的使用情况非常吻合。作为社会经济发展的指标，国内生产总值（GDP）、人口、能源消耗、公路里程和私家车与多环芳烃浓度相关，表明人类活动对多环芳烃水平的影响。PAHs 和 OCPs 浓度也受到湿地环境变化的影响，如沉积物中总有机碳 (TOC)、沙子、淤泥、粘土、石英和方解石的重建。冗余分析（RDA）结果表明，TOC 是解释 PAHs 和 OCPs 浓度的主导因素，分别为 86.7% 和 43.5%。此外，p  < 0.01) 和 OCPs (0.78, p  < 0.01)。特别是 方解石与PAHs和OCPs之间的显着正相关（p < 0.05）推断岩溶作用可能在岩溶区PAHs和OCPs的迁移中起重要作用。因此，受气候变暖下TOC含量增加和岩溶作用的影响，会贤湿地湖泊更趋向于汇而不是PAHs和OCPs的来源。