Preparation of Copper Oxide Loaded Activated Carbon by Waste Sawdust for Acid Red GR Wastewater Treatment

Abstract

The waste wood dust was utilized to prepare the copper oxide loaded activated carbon for the treatment of the printing and dyeing wastewater (acid red GR wastewater). The response surface assisted with Design-Expert 7.0 software was used to optimize the process. The secondary multiple regression models for the color and COD removal rates were established and proven to be significant. The optimum process conditions determined by the software were: copper nitrate (0.5mol/L) 15mL, ratio of liquid to solid 56, activation temperature 690 °C and activation time 2.1h, under which the color and COD removal rates reached 99.8% and 88.34%, respectively.

Study on the Adsorption Characteristics of Congo Red by Sycamore Bark Activated Carbon

“…Dye wastewater mainly comes from the production of dyes and dye intermediates industry, its deep color, complex composition, poor biodegradability and difficult degradation [1,2]. The actual use of the azo dye is the most common and the most frequently applied, approximately 50%.…”

“…The actual use of the azo dye is the most common and the most frequently applied, approximately 50%. The precursors and intermediates of azo dyes are carcinogenic, mutagenic and toxicity [3,4,5].Congo red is a typical benzidine azo dye in dyeing and printing industry, mainly for cotton, viscose dyeing and paper industry production [2,3,4,5].Currently Congo red dye wastewater treatment methods are commonly used in adsorption, membrane separation, chemical coagulation, oxidation, biological method [6,7,8].Adsorption method is an effective means of dyeing wastewater treatment, because of its convenient operation, simple process, low cost and good treatment effect have attracted much attention [9,10,11,12].…”