文献类型：期刊文献

中文题名：宁夏燃煤电厂周围降水降尘中硫氮沉降特征研究

英文题名：Sulfur and Nitrogen Deposition Near Three Coal-fired Power Plants in Ningxia

作者：王攀[1,2] 朱湾湾[1,2] 樊瑾[1,2] 许艺馨[1,2] 余海龙[1] 王斌[3] 黄菊莹[2]

第一作者：王攀

机构：[1]宁夏大学资源环境学院,宁夏银川750021;[2]宁夏大学环境工程研究院,宁夏银川750021;[3]中国林业科学研究院亚热带林业研究所,浙江富阳311400

年份：2020

卷号：29

期号：6

起止页码：1189-1197

中文期刊名：生态环境学报

外文期刊名：Ecology and Environmental Sciences

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：中国科学院“西部青年学者”(XAB2019AW03);宁夏自然科学基金项目(2020AAC03050);宁夏留学人员创新创业项目。

语种：中文

中文关键词：酸沉降临界负荷;降尘;酸沉降增加;降水;工业酸排放源

外文关键词：critical loads of acid deposition;dustfall;increasing acid deposition;rainfall;the industrial sources of acid emissions

分类号：X16;X517

摘要：燃煤电厂是SO2和NOx的主要排放源之一。本世纪初以来,随着煤炭等行业的快速发展,中国西北地区大气酸沉降速率加快。以宁东能源化工基地3个燃煤电厂为监测点,初步探讨了2019年1—6月电厂周围降水降尘S、N组成特征。结果表明:研究区SO4^2?月沉降量、NO3^?月沉降量、NH4^+月沉降量、无机N月沉降量、SO4^2?/NO3^?和NO3^?/NH4^+均存在较大变异,其平均值分别为(2.51±0.07)、(1.17±0.05)、(0.23±0.01)、(1.40±0.05)kg·hm^?2·month^?1、(3.82±0.26)和(5.34±0.21);马莲台电厂和灵武电厂具有较高的SO4^2?月平均沉降量、NH4^+月平均沉降量和SO4^2?/NO3^?,鸳鸯湖电厂具有较高的NO3^?月平均沉降量、无机N月平均沉降量和NO3^?/NH4^+;除SO4^2?/NO3^?外,5月各指标的测定值较高,2月各指标的测定值较低;除SO4^2?月平均沉降量外,各指标在取样距离间差异较小。以上结果意味着,SO4^2?是研究区降水降尘中主要的酸沉降形式、NO3^?是其主要的N沉降形式,体现了以燃煤电厂为主导的工业源排放特点;研究区SO4^2?沉降量与全国水平相当,但低于区域S沉降临界负荷。N沉降量高于中国西北地区平均值,且超过了区域可接受的沉降量;鉴于本研究收集的大气沉降为湿沉降加部分干沉降,故可能低估了研究区S、N总沉降量。考虑到酸沉降的时间累积性,宁夏燃煤电厂S、N限排工作依然十分必要。
Coal-fired power plants are one of the main sources of SO2 and NOX emissions.Since this century,the rate of atmospheric acid deposition in northwestern China has been accelerated with the rapid development of coal and other industries.Here,the deposition of S and N in rainfall and dustfall from January to June in 2019 was studied in three coal-fired power plants in Ningdong Energy Chemical Base.The results showed that,there were great variations in monthly SO4^2?deposition,monthly NO3^?deposition,monthly NH4^+deposition,monthly inorganic N deposition,SO4^2?/NO3^?,and NO3^?/NH4^+.The mean values of these indices were(2.51±0.07),(1.17±0.05),(0.23±0.01),(1.40±0.05)kg·hm^?2·month^?1,(3.82±0.26),and(5.34±0.21),respectively;monthly mean SO4^2?deposition,monthly mean NH4^+deposition,and SO4^2?/NO3^?were higher in Maliantai and Lingwu power plants,while monthly mean NO3^?deposition,monthly mean inorganic N deposition,and NO3^?/NH4^+were higher in Yuanyanghu power plant;except SO4^2?/NO3^?,the mean values of the studied indices were higher in May but lower in February;except monthly mean SO4^2?deposition,there were little changes in the studied indices across the sampling distances.These results indicate that,SO42-is the main form of acid deposition in rainfall and dustfall in the studied area,while NO3^?is the main form of N deposition,reflecting the emission characteristics of industrial source dominated by coal-fired power plants;the value of SO42-deposition is similar to the national level but lower than the S deposition critical load in the study area.Nitrogen deposition is higher than the mean value across northwestern China and exceeds the acceptable N deposition of soils in the study area;due to the collected bulk deposition was the sum of wet deposition and part dry deposition,the total S and N deposition may be underestimated in the studied area.Considering the time accumulation of acid deposition,it is still necessary to limit the S and N emissions for the coal-fired power plants in Ningxia.