Hexachloropentadiene (HCPD) is a highly toxic compound that is mainly used for preparation of organochlorine insecticides. To investigate HCPD contamination of the environment during pesticide processing, 153 air, soil, and biota samples were collected around an agrochemical factory in different seasons of 1 year and analyzed for HCPD. The HCPD concentrations were 0.01–12.7 ng/m³ (average 2.60 ng/m³) in the air samples and 0.14–51.5 ng/g (average 4.11 ng/g) in the soil samples. HCPD concentrations were highest within 1 km north of the production site, which was in the downwind direction of the factory and storage tanks, especially in autumn and winter. Soil–air exchange analysis showed that HCPD was deposited from air to soil with a flux of 0.003 to 0.20 ng/(m² d) throughout the year. The dismantling of obsolete equipment accelerated the release of HCPD into the air and increased the amount of HCPD deposited in the soil. HPCD concentration ranges were 0.44–55.7 ng/g dry weight [d.w.] (average 22.2 ng/g d.w.) and 6.69–91.4 ng/g d.w. (average 26.2) in locally grown rice and wheat, respectively. The concentration range was 12.1–1596 ng/g lipid weight (average 560 ng/g lipid weight) in local organisms, except for chicken. In tissues from locally raised chicken, the HCPD concentrations decreased in the order of gizzard, liver, heart, and meat. HCPD was amplified through a short food chain (soil, Vigna unguiculata leaves, larvae of Pieris rapae, and chicken), and the bioaccumulation factor gradually increased over a range of 1.19–25.1 (mean 9.81).

六氯戊二烯（HCPD）是一种剧毒化合物，主要用于制备有机氯杀虫剂。为了调查农药加工过程中 HCPD 对环境的污染，在 1 年的不同季节在一家农化厂周围采集了 153 个空气、土壤和生物群样本，并分析了 HCPD。空气样品中的HCPD 浓度为 0.01-12.7 ng/m ³（平均 2.60 ng/m ³），土壤样品中的 HCPD 浓度为 0.14-51.5 ng/g（平均 4.11 ng/g）。HCPD浓度在生产场地以北1公里范围内最高，位于工厂和储罐的下风向，尤其是在秋冬季。土壤-空气交换分析表明，HCPD 从空气中沉积到土壤中，通量为 0.003 至 0.20 ng/(m ² d) 全年。废弃设备的拆除加速了 HCPD 向空气中的释放，并增加了土壤中 HCPD 的沉积量。在当地种植的水稻和小麦中，HPCD 浓度范围分别为 0.44–55.7 ng/g 干重 [dw]（平均 22.2 ng/g dw）和 6.69–91.4 ng/g dw（平均 26.2）。除鸡外，局部生物中的浓度范围为 12.1–1596 ng/g 脂质重量（平均 560 ng/g 脂质重量）。在本地饲养的鸡的组织中，HCPD 浓度按砂囊、肝脏、心脏和肉类的顺序降低。HCPD 通过短食物链（土壤、豇豆叶、菜青虫幼虫, 和鸡肉), 并且生物累积因子在 1.19-25.1 的范围内逐渐增加 (平均 9.81)。