摘要:

AbstractThe sorption of sulphur dioxide by PVC wallcoverings and conventional wallpaper samples has been measured at a maximum sulphur dioxide concentration of 150 μg/m3by use of35SO2. The sorption was found to be influenced by the surface finish and design pattern of the wallpapers. Sweat deposits on the samples also influenced the pattern of uptake. The conventional wallpapers showed a greater uptake than did PVC wallcoverings in all cases

ISSN:0021-8871    

DOI:10.1002/jctb.5010200501

出版商:John Wiley&Sons, Ltd    

年代:1970

数据来源: WILEY

摘要:

AbstractA study was made of the feasibility of using coal as an adsorbent material for the removal of sulphur dioxide from stack gases emitted to the atmosphere by different industries.From preliminary results, it would appear that coal is to be favoured by a raw materials/cost‐effectiveness ratio of 2:1.The work shows semi‐quantitatively that the adsorptive capacity of sulphur dioxide on coal varies slightly from one coal to another and that when coal is used and re‐used through numerous (˜40) cycles, its effectiveness as an adsorbent for sulphur dioxide is not greatly reduced.Moreover, this research supports the view that the heating value, ash, sulphur content, etc. of most types of coal changes only slightly after repeated usage as an adsorbent for sulphur dioxide. If, as these findings indicate, coal can initially be used as a sulphur dioxide adsorbent prior to its use as a fuel, economic potential for commercial applications should be enhanced.Empirical equations, developed to correlate the adsorption‐desorption characteristics of different coals, can be used as a basis for prediction and comparison by future investigators to further explore this

ISSN:0021-8871    

DOI:10.1002/jctb.5010200502

出版商:John Wiley&Sons, Ltd    

年代:1970

数据来源: WILEY

摘要:

AbstractFace rates of growth of ammonium and potassium dihydrogen phosphate crystals have been measured for crystallisation from pure solutions and from solutions that contained known amounts of foreign ions. The level of supersaturation and the solution pH both effect the crystal habit. Low supersaturation at normal pH (3.8) tends to give tapered crystals, and at a slightly higher pH (˜5), the linear growth rates of both principal axes are considerably increased. The presence of foreign ions such as Cr3+, Fe3+and Al3+in low concentrations (˜ 1 × 10−3g ion/1 or ˜ 50 ppm) also causes a tapering habit.A mechanism of habit modification based on the presence of aquo ions at the crystal face is sugg

ISSN:0021-8871    

DOI:10.1002/jctb.5010200503

出版商:John Wiley&Sons, Ltd    

年代:1970

数据来源: WILEY

摘要:

AbstractSpectrophotometric studies were made of the reaction of the Cu complexes of L‐alanine with DL‐aspartic acid to give a precipitate of a Cu‐D‐aspartic acid complex, and the effects of stirring, addition of NaClO4as supporting electrolyte, pH and temperature on the quantity of the complex precipitated were determined.The results indicated that both L‐ and D‐aspartic acid react with the Cu‐L‐alanine complex, and the Cu‐D‐aspartic acid complex precipitated is non‐stoicheiometric, with no evidence of Cu‐Cu bonds. After precipitation of the Cu‐D‐aspartic acid complex, a Cu‐L‐aspartic acid complex is precipitated. Resolution occurs only between pH 2.7 and 5.3, and the ‘specificity’ of resolution is determined by kin

ISSN:0021-8871    

DOI:10.1002/jctb.5010200504

出版商:John Wiley&Sons, Ltd    

年代:1970

数据来源: WILEY

摘要:

AbstractThe infra‐red spectra of alkali‐metal nitrobenzenides are reported and compared with that of nitrobenzene. Tentative assignments of some of the major bands are propo

ISSN:0021-8871    

DOI:10.1002/jctb.5010200505

出版商:John Wiley&Sons, Ltd    

年代:1970

数据来源: WILEY