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- W994728770 abstract "4,4'-diaminostilbene-2, 2'-disulfonic acid (DSD acid) manufacturing wastewater was treated by a macroporous resin in a fixed-bed column. The results showed that this method was suitable for removal of chemical oxygen demands (COD) and color About 91% COD and 99.5% color removal were obtained under the optimum adsorption conditions, i.e. temperature 20 ℃, flow rate 1 bed volume/hour (BV/hr) and pH1-2. The resin was efficiently regenerated with aqueous sodium hydroxide and water. Furthermore, 65.5% of 4, 4 '-dinitrostilbene-2, 2 '-disulfonic acid (DNS) could be recovered from wastewater for possible recycling to the manufacturing process. The adsorption capacity of resin remained constant during the repetition process of adsorption and desorption." @default.
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- W994728770 date "2001-01-01" @default.
- W994728770 modified "2023-09-24" @default.
- W994728770 title "ADSORPTION AND DESORPTION OF DSD ACID MANUFACTURING WASTEWATER ON MACROPOROUS RESIN" @default.
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