下水道施設, し尿処理場などから発生する廃ガスが悪臭公害を起している。その廃ガス (悪臭成分) 中の硫化水素を次亜塩素酸塩 (過酸化水素) で酸化し, 処理 (脱臭) する方法や廃ガス中に共存するアンモニア, トリメチルアミンを塩酸水溶液に吸収させ, 除去する方法についてはすでに報告したが, その防除法の一環として, 本報では廃ガス中に共存する微量のスチレン, アセトアルデヒドを次亜塩素酸塩で酸化し, 処理する方法について検討 (K_Ga) した。その結果, 常温における最適処理条件は, ガス空塔速度1.7m/s, 液ガス比, 吸収液のpH値7前後, 次亜塩素酸塩の濃度は12×10^-3mol/lであった。
この条件で, 0.1～1.0ppmのスチレン, セアトアルデヒドはそれぞれ80%, 88%処理できた。

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The investigation was examined into restraint of nitrogen oxides in exhaust gas bychanging the combustion conditions as to municipal solid waste incinerators. The relations between nitrogen oxides in exhaust gas and combustion conditions ofmunicipal solid waste were investigated. It is confirmed that nitrogen oxides inexhaust gas have positive relation to the combustion temperatures and the concentrations of oxygen in exhaust gas. Hence relatively low combustion temperatureand low oxygen may suppress nitrogen oxide emission. But the concentrations of oxygen must be maintained with considerations of carbon monoxide and the soot and dust emissions because emissions of carbon monoxide and the soot and dust werencreased with the combustion under low oxygen atmosphere.

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Suspended particles released in glass manufacture were subjected to multielementanalysis by means of instrumental neutron activation method and energy dispersive X-ray fluorescence spectrometry. Suspended particles released from glass factories using combustion heating generally consist of both particles emitted from glass fusion and particles produced through fuel combustion. Elemental compositions of suspended particles emitted from glass fusion were found to be strongly dependent on the kind and recipe of raw materials and additives. Of the various metallic elements involved in suspended particles emitted from glass fusion, the elements, As, Se, Cd, Sb, Pb and so on are regarded to produce the most serious air pollution. The amount of emission of these elements to the environment is, however, quite varied from factory to factory. The replacement of oil combustion by electric furnace in an opal glass factory remarkably reduced the emission of metallic elements to the environment.

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