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- W121278170 abstract "Abstract In the adsorption process activated carbon is most frequently used. Owing to the high cost of this material, other substances have been recently used as adsorbents. One of them is new, mineral-carbonic adsorbent produced from wastes. Studies on usability of that sorbent for dyehouse wastewater treatment were conducted. Dusty mineral-carbonic adsorbent is produced from used up montmorillonite clays left over after refining of petroleum products. These clays are treated with concentrated sulfuric acid at the increased temperature. The sorbent having a coating of carbonized organic compounds on the mineral aluminosilicate skeleton is obtained as a product of this process. Sorbent has an active surface about 150 m 2 /g. Selective nature of the adsorbent results from its geometric and chemical character of the surface. Regeneration of the adsorbent is possible applying carbonization of the adsorbed organic impurities with a concentrated mineral acid. Preliminary batch tests and continuous flow studies were examined in situ at two dyehouses: dyeing cotton and polyester. Wastewater from the cotton dyehouse were also treated by activated carbon, for comparison purpose. The continuous pilot treatment system consisted of: contact tank where the dusty adsorbent (in a wet condition) was added to the wastewater; the vertical flow clarifier and the sand filter. The exhausted adsorbent was separated in clarifier from the liquid by precipitation with a cationic polyelectrolyte. The results of the investigation have shown that the new mineral-carbonic adsorbent removes very efficiently dyestuffs and surfactants in the dyehouse wastewaters. The process and economic effects of using adsorbent for treating 600 m 3 /d of separated, high polluted stream in comparison to granulated carbon are shown." @default.
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- W121278170 date "1988-01-01" @default.
- W121278170 modified "2023-09-23" @default.
- W121278170 title "A New Adsorbent for Wastewater Treatment" @default.
- W121278170 doi "https://doi.org/10.1016/s0166-1116(08)71286-x" @default.
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