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The treatment of salicylic acid manufacturing wastewater by NDA-100 resin was investigated. The sorption intensity of phenol was found to be strongly dependent on pH of the aqueous phase. Equilibrium adsorption data fit to both Langmuir and Freundlich models. The column adsorption showed that this process was suitable for the treatment of salicylic acid manufacturing wastewater. About 99.9% CODcr removal was obtained under the optimal operating conditions. The resin could be completely regenerated with 1 BV8%(w/w) NaOH+2BV H2O, the recovery of 98.9% of the substance was reached. This process makes it possible to recover the valuable material from the wastewater and to improve the effluent water quality.
The treatment of salicylic acid manufacturing wastewater by NDA-100 resin was investigated. The sorption intensity of phenol was found to be strongly dependent on pH of the aqueous phase. Equilibrium adsorption data fit to both Langmuir and Freundlich models. The column adsorption showed that this The process was suitable for the treatment of salicylic acid manufacturing wastewater. The 99.9% CODcr removal was obtained under the optimal operating conditions. The resin could be completely regenerated with 1 BV8% (w / w) NaOH + 2BV H2O, the recovery of 98.9% of the substance was reached. This process makes it possible to recover the valuable material from the wastewater and to improve the effluent water quality.