The burning deodorization by a fluidized bed reactor was studied principally as a way of controlling the oder pollution.
Trimethylamine and mercaptan were used as the test pollutants.
The offensive oder gas was come in contact with fluidized particles in the fluidized bed with 51 mm diameter from 300°C to 700°C with an apparent contact time between 0.1 and 0.5 sec.
To attain above 98% removal ratio of oder component, the bed temperature must be over 390°C with the 0.5 sec apparent contact time and 460°C with 0.1 sec for trimethylamine, over 460°C with 0.5 sec and over 580°C with 0.1 sec for mercaptan.
The materials concerned might be oxygenated incompletely under some conditions and in some cases oxides might discharge more offensive odor than the original

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The previous paper was concerned with the fundamental study of the burning deodorization by a fluidized bed reactor. The sulfated serpentine was found to be the most suitable fluidized materials being able to deodorize through a catlytic reaction.
This sulfated serpentine urges trimethylamine and mercaptan to decompose completly at low temperature such as 300°C.
It has been revealed that serpentine, an abundant natural resource, is useful as a catalyst in the contact oxidization method.

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Concentration levels of polycyclic aromatic hydrocarbons (PAH) in airborne dust samples taken from the Kitakyushu district were determined from Oct. 1976 to Jan. 1978. Airborne dust samples collected on glass fiber filters by high volume air samplers were treated with benzene extraction and silica gel column chromatography. Thierteen PAH in the aromatic fractions were determined by flame ionization gas chromatography with a glass capillary (G-SCOT) column. Following results were obtained.
1) High concentration levels of benzo (b) fluorathene (B (b) F) were found in each sample compared with the other PAH. Geometrical average values of this I3 (b) F in each station distributed from 17.0 to 1.23μg/1000m³.
2) Relative abundance of 13 PAH in airborne dust were similar among the samples from each sampling station. This fact suggested that PAH in airborne dust were widely diffused and equalized in the district.
3) Concentration levels of 13 PAH in airborne dust samples were high in autumn to winter, and low in spring to summer. High concentration levels of PAH were found in industrialized and heavey traffic areas.
4) To investigate daily variation of PAH concentrations, airborne dust samples were collected for seven days successively in summer and winter (the filter was changed every twenty-four hours). PAH concectrations were affected remarkably by meteological conditions, such as wind direction and weather.

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The fluorometric analysis with m-aminophenol was developed to determine acrolein and its related compounds in atmospheric environment. This investigation will be devoted primarily to the problem of air sampling with impingers.
The collection yield of acrolein increased in the presence of hydroxylamine hydrochloride to the absorbent and was approximately 98% under the following conditions. 30 mg of hydroxylamine hydrochloride was added to 10 ml of 1 M hydrochloric acid containing 30 mg of m-aminophenol and 30 mg of sulfamic acid, and this solution was used as the absorbent. Three impingers each of which contained 10 ml of this absorbent were connected in series. The sample gas was passed through three impingers at 0. 6l/min.
The blank value increased under the influence of light. Consequently, it has been reduced to onefourth by wrapping up impingers with aluminium foil.
The results of m-aminophenol method (m-A) satisfactorily corresponded to 4-hexylresorcinol method (4-HR) in concentration from 10 to 100 ppb. The correlation coefficient was 0. 991 (n=15). Since the coefficient of variation of m-A method and 4-HR method were 3. 5% and 17.5%, it was presumed that acrolein was quantitatively, determined by m-A method more accurately 4-HR method.
m-A method is suitable for the analysis of acrolein and its related compounds in the atmosphere ranging in concentration from 1 to 10 ppb.

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An investigation was made on the determination of gaseous air pollutants by secondderivative absorption spectrophotometry in ultraviolet and visible regions.
The pollutants investigated in this study are as follows: SO₂, NO, NO₂, C₆H₆, C₇H₈, C₈H₁₀ and some malodorous substances such as NH₃, (CH₃) ₃N, CH₃CHO, C₈H₈ and (CH₃) ₂S.
The absorption spectra of each of the pollutants with and without the presence of other pollutants were taken and examined on the measuring condition.
A method for the simultaneous determination of SO₂, NO and NO₂ in mixed gases by using the multichannel system also investigated and satisfactory results were obtained.
The Limits of detection were 1 ppb for SO₂, 3 ppb for NO and 20 ppb for NO₂.

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Though exhaust gas from automobile had been thought to be the main source of lead amount in urban air, exhaust gas by burning of various fuels at stationary sources has been also conjectured, as a contributor for lead amount in the environment.
In the investigation, the concentration and the distribution of particle size of lead compounds in exhaust gas from stationary sources, which were lead production from battery scraps, lead smelting of cable mold, steel production from iron scraps, plastic combution fireplace and a heavy oil boiler, were researched. As the result of this investigation, lead concentration of 0.2-1, 000 mg/m³ (3, 000-2, 0000 Nm³/hr) was detected in exhaust gas from these stationary sources and the size distribution of lead compounds in these exhaust gas was recognized as respirable. Additionally, in exhaust gas of the factories which were treated upon lead compounds, lead compounds affected by raw materials were detected.

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