Impact of Powdered Activated Carbon and Anion Exchange Resin on Photocatalytic Treatment of Textile Wastewater

Abstract

In order to clarify the impact of activated carbon and anion exchange resin on photocatalytic oxidation (PCO) of textile industry wastewater, TiO2-based PCO was investigated with aqueous solutions containing the reactive dye Reactive Blue 4 (RB4) and with a textile dye house effluent in the absence and in the presence of powdered activated carbon (PAC) and the anion exchange resin Lewatit MP 500. Addition of Lewatit improved RB4 removal to a larger extent than PAC addition. Contrasting to chloride and sulfate, hydrogen carbonate clearly inhibited PCO of RB4. However, the depression of dye removal by hydrogen carbonate was minute in the presence of Lewatit although the hydrogen carbonate concentration was not markedly decreased. Unfortunately, the beneficial effect of Lewatit addition on PCO nearly disappeared when the Lewatit/TiO2 mixture was reused three times. This was probably caused by oxidative damage of the resin. Color removal from the real dye house effluent during PCO was improved by Lewatit, but not by PAC. Contrastingly, PAC addition increased TOC removal by PCO from the real wastewater to some extent, while Lewatit had no impact. Sorbent addition does not lead to an acceptable area demand for solar PCO of the dye house effluent.

Rhodamine B dye sequestration using Gmelina aborea leaf powder

“…it is established to be harmful when swallowed, with acute oral toxicity, causes serious eye damage or irritation, hazardous to the aquatic environment with long-term effect [58,59,60]. Adsorption method using different adsorbents has been used severally for removing RhB dye from aqueous solution [59,60,61,62,63,64,65 [77,78,79,80,81,82,83,84,85,86,87,88,89]. This study is aimed at preparing, characterizing and applying Gmelina aborea leaf (GAL) activated carbon as adsorbent for the removal of RhB dye from aqueous solutions and to study the isotherm, kinetic and thermodynamic parameters governing the adsorption process.…”

Photocatalytic degradation of Rhodamine‐B dye using composite prepared from drinking water treatment sludge and nano TiO2

“…Industrial wastewater‐containing dyes must be treated before discharge to surface water. Several treatment technologies were widely used as sonochemical degradation, photocatalysis, photodegradation, chemical and physical treatment, adsorption, oxidation or ozonation, biological treatment, coagulation reduction, precipitation and flotation, adsorption, ion exchange, membrane technology, electrochemical treatment, and electrolysis (Abbasi & Asl, 2008; Cheira Mohamed et al., 2019; Dhas et al., 2015; Fan et al., 2008; Homaeigohar et al., 2016; Rashed et al., 2016, 2016a, 2016b, 2018, 2020; X. Wang et al., 2016).…”