Wildlife Institute of India, Chandrabani, Dehradun, India.
Environ Monit Assess. 2012 Sep;184(9):5295-300. doi: 10.1007/s10661-011-2340-z. Epub 2011 Sep 17.
Keoladeo National Park (KNP) is an important wintering ground for thousands of birds that undertake a perilous journey over the Himalaya to make a seasonal home in a wetland ecosystem. However, this wetland is now getting polluted by various types of contaminants such as pesticides because of the agricultural practices in the catchment area from where the park receives water. Keeping this in mind, the present study has been undertaken to assess the organochlorine pesticide (OCP) residues in the sediments inside and around KNP. Samples were collected from the different blocks of the park. The concentrations of α-HCH, β-HCH, γ-HCH, δ-HCH, S-HCH, aldrin, dieldrin, heptachlor, hept.epoxide, endosulfan-I, endosulfan-II, endo.sulfate, S-endosulfan, endrin, 4,4'-DDE, 4,4'-DDD, and DDT were quantified using gas chromatography with electron capture detection. Analysis showed that the samples were contaminated with the above mentioned pesticides and that the concentration of total OCPs in the sediments varied from 0.1173 (dieldrin) to 5.558 ppm (γ HCH) in the samples collected from inside the park, whereas a range of pesticides varying in concentration from 0.1245 (4,4'-DDD) to 7.54 ppm (γ HCH) was found in samples from outside the park. Residues of S-HCH and S-endosulfan were not detected in any of the sediment samples. The occurrence of pesticides inside the park is a major threat to the park's biodiversity. Eco-friendly agriculture practices with minimal use of inorganic chemicals are suggested to minimize the pesticide residue levels in the park.
基拉多奥国家公园（KNP）是成千上万只鸟类的重要越冬地，它们要穿越喜马拉雅山脉进行危险的迁徙，在湿地生态系统中安家。然而，由于集水区的农业活动，公园接收的水源正受到各种类型的污染物的污染，如农药。考虑到这一点，本研究旨在评估 KNP 内部和周围沉积物中的有机氯农药（OCP）残留。从公园的不同区域采集了样本。使用带有电子捕获检测的气相色谱法对 α-HCH、β-HCH、γ-HCH、δ-HCH、S-HCH、艾氏剂、狄氏剂、七氯、七氯环氧化物、硫丹-I、硫丹-II、硫丹硫酸盐、S-硫丹、异狄氏剂、4,4'-DDE、4,4'-DDD 和滴滴涕的浓度进行了定量分析。分析表明，这些样本受到了上述农药的污染，且公园内样本中总 OCP 浓度从 0.1173（狄氏剂）到 5.558ppm（γ-HCH）不等，而公园外样本中浓度范围从 0.1245（4,4'-DDD）到 7.54ppm（γ-HCH）不等。在任何沉积物样本中均未检测到 S-HCH 和 S-硫丹的残留。公园内农药的存在对公园的生物多样性构成了重大威胁。建议采用环保型农业，减少无机化学品的使用，以最大限度地减少公园内的农药残留水平。
