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| 2. |
- Aulenbach, Donald B., et al.
(author)
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Removal of heavy metals in potw using alum or sodium aluminate for phosphorus removal
- 1984
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In: Proceedings of Mid-Atlantic Industrial Waste Conference. ; , s. 318-330
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Conference paper (peer-reviewed)abstract
- The addition of alum or sodium aluminate at dosages which effectively remove phosphorus is beneficial in removing copper, chromium, and lead when present in wastewaters. Chromium removal is enhanced by sodium aluminate addition, but alum does not affect chromium removal. Both types of aluminum salts appear to increase the removal of lead, but the large variance in the data does not allow this to be confirmed by the t-tests. Of the remaining metals analyzed, no difference in removal was observed with and without aluminum salt addition for cadmium or antimony, nor was there any difference in TOC removal. Mercury was effectively removed to below the detection limit by primary sedimentation, so no further removal was achieved during secondary treatment when the alum/aluminate was added. Other metals were not present in amounts above detection limits.
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| 3. |
- Aulenbach, Donald B., et al.
(author)
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Removal of Heavy Metals in Publicly Owned Treatment Works
- 1987
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In: Environmental Progress. ; 6:2, s. 91-98
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Journal article (peer-reviewed)abstract
- Studies were conducted at three activated sludge treatment plants during normal operation. The heavy metals were measured in the influent to each plant, the primary sedimentation effluent where applicable, the discharge after activated sludge treatment and secondary sedimentation, and in one case after a final polishing filter. Both the soluble and the total portions were measured. Beryllium, nickel, and thallium were not found in detectable levels in any of the plant influents. Mercury was found in only trace amounts. The removals of the other metals varied considerably. No consistent conclusions can be made from the data; each metal, soluble or total fraction, and unit treatment operation must be interpreted individually. The only metal in the plant effluents consistently above the recommended limit was arsenic, and this barely above the limit, and the lead content from Fitchburg, despite 83% removal.
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| 5. |
- Ayyangar, N. R., et al.
(author)
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Polycyclic compounds. Part III1 1 For Part II, see Ref. 2.-colour and chemical constitution of 2-aryl phenalen-1-one derivatives
- 1986
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In: Dyes and Pigments. ; 7:2, s. 81-92
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Journal article (peer-reviewed)abstract
- The UV-visible spectra of several 3-substituted 2-aryl phenalen-1-ones and dyes such as C.I. Disperse Red 303 which incorporate the phenalen-1-one as the basic chromophore are recorded and colour-chemical constitution aspects of these compounds have been studied. The fluorescence spectral data of C.I. Disperse Red 303 revealed that the component 1 was more fluorescent than the component 2, although 2 was more bathochromic compared with 1. The difference in the fluorescence intensity has been explained on the basis of difference in polarity of the carbonyl group brought about by the positional difference of the electron donor ring sulphur atom. Confirmation of these observations was obtained by X-ray crystallographic study of component 1 of C.I. Disperse Red 303. © 1986.
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| 7. |
- Hagman, U, et al.
(author)
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Food habits and nutrient intake in childhood in relation to health and socio-economic conditions. A Swedish Multicentre Study 1980-81.
- 1986
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In: Acta paediatrica Scandinavica. Supplement. - 0300-8843. ; 328, s. 1-56
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Journal article (peer-reviewed)abstract
- In Sweden a multicentre nutritional survey was performed in 1980-81 in four different parts of Sweden. The total number of children investigated was 1109, of whom 92 were two years old, 332 four years, 338 eight years and 347 thirteen years. The 24-hour recall method was used in all children. In addition 7-day record was used in the 2-, 4- and 8-year-olds and the dietary history method in the 13-year-olds. During the weekdays the 2-, 4-, 8- and 13-year-old children had 5.9, 5.8, 5.4 and 5.2 meals and snacks per day, respectively. During weekends these respective numbers decreased to 5.7, 5.6, 5.1 and 5.0. The mean number of light meals and snacks was almost the same on all days and varied between 2.4 and 3.3 in the different age groups. The part of the energy intake deriving from snacks has increased during the last 15 years. The mean daily energy intakes for the 2-, 4-, 8- and 13-year-old boys and girls were 5.8 and 5.6, 6.9 and 6.5, 8.9 and 7.9 and 12.1 and 9.7 MJ respectively. These values are below the recommendations for all age groups except the 2-year-old boys. The mean daily intakes of protein, retinol, ascorbic acid, thiamin, riboflavin, niacin, vitamin B12 and calcium were almost invariably higher or much higher than the recommendations, while those of vitamin D and zinc were below the recommended values. The iron intake fulfilled the recommendations except for the 2-year-olds and the 13-year-old girls. The intake of protein and fat expressed in per cent of the total energy intake was very similar in all age groups, about 14 per cent and 35-37 per cent respectively. The mean ratio between polyunsaturated and saturated fatty acids (P/S ratio) was also the same in all age groups, i.e. 0.22-0.23. This low ratio is explained by a high consumption of dairy products. Furthermore, the nutrient density of the food did not change appreciably with age. The only exception was found for the 2-year-old children, who had slightly higher nutrient density values on account of a relatively high consumption of fortified follow-up formula. In all age groups the mean nutrient densities of vitamins D and B6 and of iron were below the recommendations to varying degrees. No clinical signs of nutritional deficiencies, iron deficiency included, were found in any age group.(ABSTRACT TRUNCATED AT 400 WORDS)
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| 10. |
- Holmgren, G, et al.
(author)
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Positive effect of a late introduced modified diet in an 8-year-old pku child.
- 1980
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In: Neuropadiatrie. - : Georg Thieme Verlag KG. - 0028-3797. ; 11:1, s. 76-9
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Journal article (peer-reviewed)abstract
- A modified low phenylalanine diet was instituted in an 8-year-old PKU boy earlier untreated and mentally retarded. The boy was treated during a ten year observation period. A marked progress in mental capacity and in IQ scoring was seen. The difficulties in objective evaluation of the benefit of late introduced treatment with a diet low in phenylalanine is discussed.
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