State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, China.
State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, China; College of Resources and Environment, Yangtze University, Wuhan, 430100, China.
Environ Pollut. 2022 Nov 15;313:120139. doi: 10.1016/j.envpol.2022.120139. Epub 2022 Sep 7.
Neonicotinoid insecticides (NNIs) had been detected in soil and surface water frequently because of extensive use worldwide, however, data regarding regional characteristics and potential influential factors of sediment were scarce. In the present study, eight NNIs were analyzed in 86 surface sediment samples from different regions (central cities, rural areas and suburbs) and land use types (construction land and crop land) in Jiangsu Province. NNIs were widespread in the sediments, with a mean value of 1.73 ± 0.89 ng g dry weight (dw) (ranged from 0.41 to 3.87 ng g dw). Imidaclothiz (IMIZ), dinotefuran (DIN) and nitenpyram (NIT) were the dominant compounds in the surface sediment, accounted for half of combined total. The results of regional distribution analysis show that NNIs were at higher concentrations in rural areas and crop land, while the residues of NNIs in lakes were more severe compare with rivers in Jiangsu Province. Region characteristics and land use types have an influence on residues of NNIs in surface sediment. Principal component analysis showed that residues of NNIs in surface sediment in Jiangsu Province mainly originated from protect grain crops (maize), fruit (apples, pears) and vegetables in agricultural systems. The residues of NNIs were found to be mostly concentrated in the northwest and northeast in Jiangsu Province, where were the area of intensive agriculture. To investigate the residues of NNIs, while identify the contributing factors, could provide a scientific basis for basic of region environment management and pollution control.
新烟碱类杀虫剂（NNIs）在全球范围内广泛使用，因此经常在土壤和地表水检测到，但有关沉积物区域特征和潜在影响因素的数据却很少。本研究分析了江苏省不同地区（中心城市、农村和郊区）和土地利用类型（建设用地和耕地）的 86 个表层沉积物样本中的 8 种 NNIs。NNIs 在沉积物中广泛存在，其平均值为 1.73±0.89ng g 干重（范围为 0.41 至 3.87ng g dw）。噻虫嗪（IMIZ）、噻虫胺（DIN）和吡虫啉（NIT）是表层沉积物中的主要化合物，占总量的一半。区域分布分析结果表明，NNIs 在农村和耕地中的浓度较高，而江苏省湖泊中 NNIs 的残留量比河流更严重。区域特征和土地利用类型对表层沉积物中 NNIs 的残留有影响。主成分分析表明，江苏省表层沉积物中 NNIs 的残留主要来源于农业系统中的保护粮食作物（玉米）、水果（苹果、梨）和蔬菜。在江苏省西北部和东北部，NNIs 的残留量发现主要集中在农业集约化地区。调查 NNIs 的残留情况，同时确定其贡献因素，可以为区域环境管理和污染控制的基础提供科学依据。
