Advanced treatment of actual textile dye wastewater by Fenton‐flocculation process

Abstract

To improve the performance of actual textile dye wastewater treatment, an advanced treatment combining the Fenton and flocculation processes was developed. The parameters affecting decolorization in the Fenton-flocculation process, including initial pH, H 2 O 2 dosage, Fe 2þ dosage, reaction temperature, reaction time, and flocculant dosage, were examined. With the optimal Fenton-flocculation condition parameters, more than 95 % COD removal, 99 % colour removal, and 99 % turbidity removal were obtained. UV-visible spectra of raw water and supernatant were further obtained after the Fenton-flocculation process, and results demonstrated that the chromophoric groups and the conjugated system in the dye molecular structure were destroyed. All these results confirmed that the Fenton-flocculation process was a favourable and effective post-treatment method for actual textile dye wastewater.

The Combination of MoS2/WO3 and Its Adsorption Properties of Methylene Blue at Low Temperatures

“…Besides, the peaks at the binding energy of 529.0 eV in Figure 4B 1 and 532.6 eV in Figure 4C 3 were both due to the adsorbed O on the surface of the samples. In Figure 4C 4 , the peaks at about 36.3 eV and 35.2 eV of W 4f 7/2 suggest the formation of W-O and W-S bindings. S 2p spectra in the obtained samples ( Figure 4A 2 ,C 2 ) could be deconvoluted into three pairs of peaks (S 2p 3/2 , S 2p 1/2 ), corresponding to MoS 2 , MoS x , and W-S-Mo respectively.…”

“…Therefore, it is meaningful to treat wastewater containing MB [3]. At present, there are many physical, chemical, and biological methods used in the treatment of organic dye wastewater, such as flocculation precipitation [4], hydrogen peroxide treatment [5], and photo electrocatalytic degradation [6,7]. Chemical adsorption is a method of adsorbing nonionic organic refractory compounds in dye wastewater [8].…”

Synthesis and Characterization of Ampholytic Flocculant CPCTS-g-P (CTA-DMDAAC) and Its Flocculation Properties for Microcystis Aeruginosa Removal

“…The optimal CPCTS-g-P (CTA-DMDAAC) dosages for different Chl-a contents were investigated, and corresponding experimental data were obtained. The R 2 of the linear fit equation was 0.502, thereby indicating that CPCTS-g-P (CTA-DMDAAC) dosage had a certain relative relationship with Chl-a content [43]. Under some conditions, it can be used to predict the optimal CPCTS-g-P (CTA-DMDAAC) dosage for obtaining the maximum Chl-a removal rate [44,45].…”

Chemical Waste and Allied Products

“…An advanced treatment method combining the Fenton and flocculation processes was used for dye wastewater treatment (Xiao et al, 2017). The results showed that, more than 95% COD, 99% color, and 99% turbidity, were removed from dye wastewater.…”