What are the chemical approaches for textile dye wastewater treatment?

Chemical approaches for textile dye wastewater treatment, including coagulation-flocculation (A), photocatalytic degradation of toxic dye molecules (B), photo-Fenton (C), electro-Fenton (D), electrocoagulation (E), and anodic oxidation approach (F). 3.2.1. Coagulation-flocculation

Why are dyes and textile pigments a problem in wastewater?

The presence of dyes and textile pigments in wastewater, on the other hand, causes it to be highly colored, with a variable pH and high levels of biological oxygen demand (BOD), chemical oxygen demand (COD), total organic carbon (TOC), and suspended solids.

How do textile dyes affect the esthetic quality of water?

Textile dyes degrade the esthetic quality of bodies of water by increasing biochemical and chemical oxygen demand, impairing photosynthesis, inhibiting plant growth, entering the food chain, providing recalcitrance and bioaccumulation, and potentially promoting toxicity, mutagenicity, and carcinogenicity.

Are textile dyes toxic?

Textile dyes are toxic and discharged as effluent into the aquatic environment. Non-pretreated effluent has significant negative impacts on living microorganisms. Dye-containing wastewater should be effectively treated using eco-friendly methods. Combined approaches and recent technologies are promising for dye removal.

What are the disadvantages of dye removal from textile wastewater?

Furthermore, the main disadvantages for commercial use of chemical approaches for dye removal from textile wastewater are the high electrical energy requirements, large amounts of used chemicals, and the requirement of proper equipment (Kishor et al., 2021).

Does polyacrylamide dye increase settling time of db78 dye using chitosan?

The results of the study revealed that the presence of polyacrylamide dye enhanced the removal efficiency and settling time of DB78 dye using chitosan.