燃煤电厂附近农田环境及蔬菜中硫的污染评价  

Sulfur Pollution Assessment of Cropland Environment and Vegetables around a Coal-Fired Power Plant

作　　者：代恒美 张华 刘龙 韦艳 潘莎 DAI Hengmei;ZHANG Hua;LIU Long;WEI Yan;PAN Sha(School of Public Health,the Key Laboratory of Environmental Pollution Monitoring and Disease Control,Ministry of Education,Guizhou Medical University,Guiyang 550025;College of Food Safety,Guizhou Medical University,Guiyang 550025,China)

机构地区：[1]贵州医科大学公共卫生学院/环境污染与疾病监控教育部重点实验室,贵阳550025 [2]贵州医科大学食品安全学院,贵阳550025

出　　处：《东北农业科学》2022年第4期136-141,共6页Journal of Northeast Agricultural Sciences

基　　金：贵州省科技计划项目(黔科合平台人才【2018】5779);贵州省区域内一流学科建设项目-公共卫生与预防医学(黔教科研发【2017】85号);贵州省科技合作计划项目(黔科合LH字【2015】7332)。

摘　　要：了解某燃煤电厂附近农田环境及蔬菜中硫含量及污染水平,以期为区域农业生态环境质量、食品安全评价及食品中硫限量标准的制定提供理论依据。对某燃煤电厂周围大气、农田土壤和蔬菜中硫含量进行测定,并研究其相互关系。结果表明:燃煤电厂周边0.5、1 km处大气SO_(2)浓度(0.5 km:0.66 mg/m^(3),1 km:0.57 mg/m^(3))超过《环境空气质量标准(GB 3095-2012)》二级标准限值。0.5 km处土壤硫含量(540.91 mg/kg)超过我国土壤硫含量范围和贵州省土壤硫背景值。蔬菜硫含量范围为4.5~34.3 mg/g,平均含量为15.2 mg/g,11种蔬菜的单因子污染指数均大于1。随着离污染源距离的增大,空气中SO_(2)浓度及白菜、豌豆尖和莴笋的硫含量均呈减小趋势。空气与土壤硫含量呈显著正相关,蔬菜叶片硫含量与空气、土壤中硫含量的相关性不明显。燃煤电厂生产活动对周边一定区域空气、土壤造成硫污染,周边蔬菜存在严重硫污染情况,应及时采取相应的措施,保证区域生态环境的安全。To understand the S content and pollution level of cropland environment and vegetables around a coal-fired power plant,and provide a theoretical basis for evaluation of regional agro-ecological environment quality and food safety,and formulation of limit standard in food.The contents of S in air,soil and vegetables around a coal-fired power plant were determined,with their correlations analyzed.The results showed that the atmospheric SO_(2) concentrations at 0.5 km(0.66 mg/m^(3))and 1 km(0.57 mg/m^(3))around the coal-fired power plant exceeded the second-level limits of the national ambient air quality standard(GB 3095-2012).The soil sulfur content at 0.5 km(540.91 mg/kg)exceeded the China's general range and background value of Guizhou Province.The sulfur content in vegetables ranged from 4.5 to 34.3 mg/g,with an average content of 15.2 mg/g.The single factor pollution index of 11 vegetable species was higher than 1.It was found that the decreases of sulfur concentration in air and three vegetables(Brassica pekinensis,Pisum sativum and Lactuca sativa var.angustanalrish)is associated with the increase of the distance.There was a significant positive correlation with the air and soil sulfur content,but sulfur contents in the leaves did not correlated with those in air and soils.It is concluded that the air and soil in certain surrounding areas subjected to sulfur pollution caused by the production activities of a coal-fired power plant,and there is serious sulfur pollution in vegetables around a coalfired power plant.Corresponding measures should be taken to ensure the safety of regional ecological environment.

关 键 词：燃煤电厂 空气 土壤 蔬菜 硫污染 

分 类 号：X503.231[环境科学与工程—环境工程]