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- E-ISSN 2288-8985
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Analysis of Sludges from Wastewater of Hanji Production
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1999, v.12 no.4, pp.318-325
Choi,
H., &
Kim,
T.
(1999). Analysis of Sludges from Wastewater of Hanji Production. Analytical Science and Technology, 12(4), 318-325.
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Abstract
Sludges from the wastewater of hanji production were analysed to see that sludges from the bleaching process, the bleach washing process, and the paper preparation process were fibrous, while sludges from the process cooking with NaOH and the process of final chemical and microbiological treatment were non-fibrous. Sludge solution from the bleaching process had the most amount of solid matters. Sludges from the bleaching process, the bleach washing process, and the final chemical and microbiological treatment process contained about 80-90 %(w/w) moisture. Owing to hypochlorite ion, pH of sludge from the bleaching process was higher than any other sludge samples. The inorganic components of sludges were determined by ICP-AES. The major inorganic component of sludge from the process cooking with NaOH was Na, while the sludge from the bleaching process had Na and Ca, major components in the final chemical and microbiological treatment process were Ca and Al. Trace amount of Mg, Fe, K, P, Mn and Ti were observed in sludges. Sludge from the bleaching process had ashes more than any other sludges. Shape of sludges observed by SEM was appeared to fibrous or crystalline, and the breadth of fibrous sludge was <TEX>$5{\sim}50{\mu}m$</TEX>. The sludge from the bleaching process had the most amount of matters soluble by cold and hot water and by alcohol-benzene.
- keywords
- hanji sludge, amount of solid matters, ICP, shape of sludge, SEM
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