Study on the treatment of simulated azo dye wastewater by a novel micro-electrolysis filler

Abstract

A new type of iron-copper-carbon (Fe-Cu-C) ternary micro-electrolysis filler was prepared with a certain proportion of iron powder, activated carbon, bentonite, copper powder, etc. The effect of the new type of micro-electrolysis filler on the simulated methyl orange dye wastewater was studied. The effects of various operational parameters, such as reaction time, initial pH value, aeration rate, filler dose and reaction temperature, on the degradation rate of methyl orange were studied to determine the optimum treatment conditions, and the micro-electrolysis filler was characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The experimental results show that the degradation rate of 220 mL of simulated dye wastewater with a concentration of 100 mg/L reached 93.41% ± 2.94% after 60 mL/min of aeration, with an initial pH = 2, a dose of 45 g and 125 minutes of reaction at room temperature. The new micro-electrolysis filler has a high degradation rate for methyl orange solution, which is attributed to the iron and activated carbon particles sintered into an integrated structure, which makes the iron and carbon difficult to separate and affects the galvanic cell reaction. The addition of copper also greatly increases the transmission efficiency of electrons, which promotes the reaction. In addition, the surface iron is consumed, the adjacent carbon is stripped layer by layer, and the new micro-electrolytic filler does not easily passivate and agglomerate during its use.

Chemical waste and allied products

“…They face some key challenges such as (a) realization of laboratory-scale investigations for industrial uses; (b) knowledge gaps on enzyme-integrated nanotechnologies; (c) immobilized recovery of enzymes; (d) synthesis of hybrid nanoflowers; and (e) sustainability of nanomaterial application. Sun et al (2019) studied the effects of micro-electrolysis filler form on simulated wastewater treatment of methyl orange dyes. This filler for micro-electrolysis was prepared with activated carbon, iron powder, copper powder, and bentonite.…”

“…Sun et al (2019) studied the effects of micro‐electrolysis filler form on simulated wastewater treatment of methyl orange dyes. This filler for micro‐electrolysis was prepared with activated carbon, iron powder, copper powder, and bentonite.…”

Characteristics of poly-silicate aluminum sulfate prepared by sol method and its application in Congo red dye wastewater treatment

“…Dyeing wastewater is characterized by deep color, high toxicity, high chemical oxygen demand (COD) and biochemical oxygen demand (BOD) values, complex composition, large discharge, wide distribution, and difficult degradation. 4,5 Therefore, treatment of dye wastewater has been widely concerned. Several methods include biological approach, sedimentation, adsorption, oxidation, coagulation and occulation (CF) have been reported.…”