Unexpected/contrary behavior of aerosol mass concentration in response to the individual components'concentration reduction in Kitakyushu,Japan  

作　　者：Xi Zhang Takuya Murakami Jinhe Wang Masahide Aikawa 

机构地区：[1]Faculty of Environmental Engineering,The University of Kitakyushu,1-1,Hibikino,Wakamatsu,Kitakyushu,Fukuoka 808-0135,Japan [2]Resources and Environment Innovation Research Institute,School of Municipal and Environmental Engineering,Shandong Jianzhu University,Jinan 250101,China

出　　处：《Journal of Environmental Sciences》2024年第1期630-639,共10页环境科学学报（英文版）

摘　　要：In the suburbs of Kitakyushu,Japan,the inorganic aerosol mass concentration(IAM)was about 32.7μg/m^(3),with the aerosol pH of 3.3.To study the thermodynamics of aerosol when its individual components'concentration is reduced,sensitive tests were performed using the ISORROPIAⅡmodel,in which the seven control species—TNaCl,TNH_(4)^(+),TSO_(4)^(2-),TNO_(3)^(-),TMg^(2+),TK^(+),and TCa^(2+)—were taken into account.IAM and inorganic aerosol pH after reducing TNaCl,TNO_(3)^(-),TMg^(2+),TK^(+),and TCa^(2+)responded linearly(0%≤concentration reduction ratio(CRR)≤100%,with the exception of 100%in TNaCl);the nonlinear variations of these two parameters could be observed by controlling TNH_(4)^(+)and TSO_(4)^(2-).Unexpected aerosol behavior occurred at 100%reduction of TNaCl,which was caused by the sudden increase of NO_(3)^(-),NH_(4)^(+),and aerosol liquid water content(ALWC);the increase of IAM was also observed after controlling TSO_(4)^(2-)(60%≤CRR≤100%)and TCa^(2+)(0%≤CRR≤100%),which was mainly related to the variation of ALWC driven by the response of CaSO_(4).Multiple regression analysis showed that ALWC was statistically and strongly related to the variations of NO_(3)^(-),Cl-,SO_(4)^(2-),HSO_(4)^(-),HNO_(3),and NH_(3)(P<0.05),with regression coefficients of 1.68,5.23,1.83,2.81,0.34,and 0.57,respectively.The highest coefficient(5.23)was found for Cl^(-),revealing that sea salts significantly influenced particle responses.Overall,this study comprehensively investigated aerosol characteristics and inner responses for the reduction of components,which is of great significance for a better understanding of atmospheric chemistry in Kitakyushu,Japan.

关 键 词：Sensitive tests REDUCTION Gas-particle conversion process Aerosol liquid water content Sea salts 

分 类 号：X513[环境科学与工程—环境工程]