Study of Environmental Concerns of Dyes and Recent Textile Effluents Treatment Technology: A Review

Abstract

The textile industry is one of the significant industries which produces large amount of wastewater effluents all year. The kind of these effluents has the features of higher rate of BOD, COD, complex structure, color, great emission and hard degradation. If being directly discharged without treatment, it will cause a potential hazard to the aquatic ecosystem and human. This paper provides the literature information about the environmental concern and their toxicity effects as well as classification of dyes. This review will present the methods for the removal of dyes from aqueous solution and wastewater effluents. The various dye removal techniques are classified into biological, chemical, physical methods, in addition to combination treatments. Biological methods include aerobic and anaerobic degradation bioremediation by bacteria & fungi and algae, while chemical methods comprise coagulation or flocculation combined through floatation and filtration, precipitation, electro floatation, electro kinetic coagulation, conventional oxidation methods by oxidizing agents such as ozone, irradiation or electrochemical processes. Furthermore, physical technologies as adsorption, ion exchange and filtration coagulation methods.

Studying the Adsorptive Behavior of Poly(Acrylonitrile-co-Styrene) and Carbon Nanotubes (Nanocomposites) Impregnated with Adsorbent Materials towards Methyl Orange Dye

“…The adsorption trials were investigated in batch equilibrium mode using an aqueous methyl orange solution. The effect of varying adsorbent dose (0.001-0.1 g), initial MO concentration (20-100 mg L −1 ), pH (3)(4)(5)(6)(7)(8)(9)(10)(11), adsorption temperature (30-60 • C), and contact time (15-120 min) was studied. A defined mass of the three polymers (0.01 g) was mixed and primary pH was adjusted with 0.1 N NaOH or HCl.…”

Sargassum latifolium as eco-friendly materials for treatment of toxic nickel (II) and lead (II) ions from aqueous solution

“…The accelerated urbanization, industrialization and human activities have resulted in serious pollution hazards in aquatic environment (Barquilha et al, 2019). Heavy metals contamination received global concern in the last decades due to their toxicity, non-biodegradable nature and bioaccumulation properties (Yang et al, 2015;Al Prol 2019). Heavy metals are constituents of earth"s rocks and are utilized in many manufacturing operations (El-Metwally et al, 2019).…”

“…Discharge of industrial wastes usually contains large amounts of toxic metallic ions like Cd 2+ , Zn 2+ , Cr 3+ , Ni 2+ , Cu 2+ and Pb 2+ ; most of these wastes ultimately reach marine environment (Ajmal et al, 1998). Wastewater from mining, metal processing, printing, electroplating, textile, photographic materials, petroleum refining in addition to battery manufacturing are the highest sources of heavy metal pollution (Al Prol 2019).…”

Effect of face mask inks and dyes on human health during the COVID-19 pandemic

“…Most commercially available masks are made from layers of plastics, whose negative impact on both human health and the environment is well-known. In addition to the toxic content of plastics, textile dyeing is a major source of pollution and is not only toxic but also persistent [3][4][5][6] . Furthermore, the impact of different paints and inks on human health is rarely, if ever, taken in account when choosing a mask [4][5][6][7] .…”

“…In addition to the toxic content of plastics, textile dyeing is a major source of pollution and is not only toxic but also persistent [3][4][5][6] . Furthermore, the impact of different paints and inks on human health is rarely, if ever, taken in account when choosing a mask [4][5][6][7] . As is known, different paints and inks are composed of a range of chemical compounds, including volatile organic compounds (VOCs) as chemical elements.…”