The nationalAirPollutionPreventionandControlActionPlanrequiredsignificant decreases inPM2.5 levels overChina.Toexploremoreeffectiveemissionabatement strategies inindustrialcities,acasestudywasconductedinBaotoutoevaluatethecurrent
national controlmeasures.ThetotalemissionsofSO2, NOX, PM2.5 and NMVOC (non-methanevolatileorganiccompounds)inBaotouwere211.2Gg,156.1Gg,28.8Gg, and 48.5Gg,respectivelyin2013,andtheywouldexperienceareductionof30.4%,26.6%, 15.1%, and8.7%,respectivelyin2017and39.0%,32.0%,24.4%,and12.9%,respectivelyin 2020. TheSO2, NOX and PM2.5 emissionsfromtheindustrialsectorwouldexperiencea greater decrease,withreductionsof37%,32.7and24.3%,respectively.From2013to2020, the concentrationsofSO2, NO2, andPM2.5 are expectedtodeclinebyapproximately30%, 10% and14.5%,respectively.ThereductionrateofSNA(sulfate,nitrateandammonium) concentrationswassignificantlyhigherthanthatofPM2.5 in 2017,implyingthatthecurrent key strategytowardcontrollingairpollutantsfromtheindustrialsectorismorepowerful for SNA.Althoughairpollutioncontrolmeasuresimplementedintheindustrialsector could greatlyreducetotalemissions,constrainingtheemissionsfromlowersourcessuch as residentialcoalcombustionwouldbemoreeffectiveindecreasingtheconcentrationof PM2.5 from 2017to2020.Theseresultssuggestthatevenforatypicalindustrialcity,the reduction ofPM2.5 concentrationsnotonlyrequiresdecreasesinemissionsfromthe industrial sector,butalsofromthelowemissionsources.Theseasonalvariationinsulfate concentrationalsoshowedthatemissionfromcoal-burningisthekeyfactortocontrol during theheatingseason. 相似文献
The pollution characteristic of polycyclic aromatic hydrocarbons(PAHs) in common used mineral oils, semi-refined oils, refined oils and solid wastes produced during the used mineral oil regeneration process was analyzed. The results showed that total PAHs content in six common used mineral oils was as follows: used engine oil used quenching oil used casting oil used hydraulic oil used antirust oil used industrial lubricating oil. Furthermore, this order was dependent on the source of PAHs and oil working temperatures. Additionally, total PAHs content in regenerated oils was as follows: semi-refined oil refined oil crude oil, which was related to the catalytic cracking process of crude oil and adsorption refining process of semi-refined oil. The ranking of total PAHs content in regenerated wastes varied depending on the regeneration technology used as follows: waste adsorption sand acid sludge waste clay precipitation sludge cracked residue. In all types of used mineral oils and regenerated wastes, the maximum and minimum proportions of the total PAHs content were composed of 2–3 ring-PAHs and 5–6 ring-PAHs, respectively. The majority of PAHs in the used mineral oils entered into regenerated wastes during regeneration process, while a small number remained in the regenerated oil. 相似文献
Environmental Science and Pollution Research - The hydrodynamics and water quality of a lake in response to human activities is an important yet poorly understood issue. In this study, the... 相似文献
Evaluating carbon emission performance of the construction industry is a significant prerequisite for developing regional carbon mitigation plans. Taking environmental and technical heterogeneities into account, this paper employed a meta-frontier method to measure the carbon emission efficiency, carbon mitigation potential, and costs of the construction sector in different regions of China from 2005 to 2016. The empirical results show that substantial disparities in carbon emission efficiency exist in the construction industry. The total carbon mitigation potential of this sector was 206.76 million tons, with the Lower Yellow river area accounting for the largest proportion at 27%. Meanwhile, the carbon mitigation costs of this sector increased from 584.94 to 1273.30 yuan/ton during 2005–2016. The highest mitigation costs occur in the Lower Yangtze River area and the South Coastal area, indicating it was more costly in these areas to conduct additional carbon emissions mitigation. The results could facilitate the policy formulation on regional-oriented carbon emissions mitigation of the construction industry in China.