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Source characterization of PM_(10) and PM_(2.5) mass using a chemical mass balance model at urban roadside

机译:在城市路边使用化学物质平衡模型对PM_(10)和PM_(2.5)的质量进行源表征

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The 24-h average ambient paniculate matter (PM_(10) and PM_(2.5)) concentrations are sampled concurrently during November 2008-April 2009 at a busy roadside in Chennai City, India. The elemental (Ag, Al, As, B, Ba, Be, Bi, Ca, Cd, Co, Cr, Cu, Fe, Ga, K, Li, Mg, Mn, Mo, Na, Ni, Pb, Rb, Se, Sr, Te, Tl, V and Zn) and ionic (Na~+, NH_4~+, K~+, Ca~(2+), Mg~(2+), F~-, Cl~-, NO_2~-, NO_3~- and SO_4~(2-)) composition of PM_(10) and PM_(2.5) are determined using an inductively coupled plasma-optical emission spectrometer (ICP-OES) and an ion chromatograph (IC), respectively. The emission inventory at the study area is also carried out to identify the likely PM emission sources. The US. EPA's-CMB (chemical mass balance) version 8.2 is applied to identify the source contribution of ambient PM_(10) and PM_(2.5) concentrations at the study area. Results indicated that diesel exhausts (43-52% in PM_(10) and 44-65% in PM_(2.5) and gasoline exhausts (6-16% in PM_(10) and 3-8% in PM_(2.5) are found to be the major source contributors at the study site followed by the paved road dusts (PM_(10) = PM_(2.5 = 0.-23%), brake lining dusts (0.1% in PM_(10) and 0.2% in PM_(2.5), brake pad wear dusts (0.1% in PM_(10) and 0.01% in PM2.5), marine aerosols (PM_(10) = PM_(2.5 = O.l%) and cooking (-0.8% in PM_(10) and -1.5% in PM_(2.5).
机译:在2008年11月至2009年4月期间,在印度钦奈市繁忙的路边同时采样了24小时平均颗粒物(PM_(10)和PM_(2.5))浓度。元素(Ag,Al,As,B,Ba,Be,Bi,Ca,Cd,Co,Cr,Cu,Fe,Ga,K,Li,Mg,Mn,Mo,Na,Ni,Pb,Rb,Se ,Sr,Te,Tl,V和Zn)和离子(Na〜+,NH_4〜+,K〜+,Ca〜(2 +),Mg〜(2 +),F〜-,Cl〜-,NO_2〜分别使用感应耦合等离子体发射光谱仪(ICP-OES)和离子色谱仪(IC)确定PM_(10)和PM_(2.5)的-,NO_3-和SO_4-(2-)组成。还对研究区域的排放清单进行了确定,以识别可能的PM排放源。美国。 EPA的CMB(化学物质平衡)版本8.2用于确定研究区域中环境PM_(10)和PM_(2.5)浓度的来源贡献。结果表明,发现柴油机废气(PM_(10)中的43-52%和PM_(2.5)中的44-65%,以及汽油废气(PM_(10)中的6-16%和PM_(2.5)中的3-8%成为研究现场的主要污染源,其次是铺装的道路粉尘(PM_(10)= PM_(2.5 = 0.-23%),刹车片粉尘(PM_(10)中为0.1%和PM_(0.2%) 2.5),刹车片磨损粉尘(PM_(10)中为0.1%和PM2.5中为0.01%),船用气溶胶(PM_(10)= PM_(2.5 = Ol%)和烹饪(PM_(10)中为-0.8%在PM_(2.5)中为-1.5%。

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