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首页> 外文期刊>Journal of the Indian Chemical Society >Aqueous phase atmospheric oxidation of sulfur dioxide by oxygen : Role of trace atmospheric constituents - Metals, volatile organic compounds and ammonia
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Aqueous phase atmospheric oxidation of sulfur dioxide by oxygen : Role of trace atmospheric constituents - Metals, volatile organic compounds and ammonia

机译:氧气对水相大气中二氧化硫的氧化作用:微量大气成分的作用-金属,挥发性有机化合物和氨

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摘要

The oxidation of dissolved sulfur dioxide, i.e. sulfur(IV) by oxygen is an important pathway in the acidification of atmospheric waters. Over the years, much work has been done in our laboratory on this important atmospheric reaction. The catalytic role of transition metal ions, viz. Fe~(III), Mn~(II), Cu~(II), Ni~(II), Ag~I, Os~(VIII) and Pd~(II) has been examined. The role of surface catalysis on this reaction in suspensions of CoO, C2O3, CuO, Cu2O, MnO2, Ni2O3, CdO, CdS, MgO, SiO2, PbO2, free fall atmospheric dust, fly ash, rock and mineral powders, lime stone etc. has been examined. It was shown for the first time that ammonia and ammonia ions - important trace atmospheric constituents - inhibit the oxidation of dissolved SO2 if pH > 7 and [NH3]_T exceeds a particular value (~5 x 10~(-5) mol L~(-1)).
机译:溶解的二氧化硫,即氧气对硫(IV)的氧化是大气水酸化的重要途径。多年来,在我们的实验室中,对于这一重要的大气反应已经做了很多工作。过渡金属离子的催化作用,即。研究了Fe〜(III),Mn〜(II),Cu〜(II),Ni〜(II),Ag〜I,Os〜(VIII)和Pd〜(II)。在CoO,C2O3,CuO,Cu2O,MnO2,Ni2O3,CdO,CdS,MgO,SiO2,PbO2,自由落体大气粉尘,粉煤灰,岩石和矿物粉末,石灰石等悬浮液中,表面催化对该反应的作用。已经检查过了。首次表明,如果pH> 7且[NH3] _T超过特定值(〜5 x 10〜(-5)mol L〜),氨和氨离子-重要的微量大气成分-会抑制溶解的SO2的氧化。 (-1))。

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