Methods of Dyes Removal from Aqueous Environment

Abstract

In this paper, selected methods of dyes removal from water environment were discussed, with particular attention to the adsorption method. A literature review of the latest scientific research on colour impurities removal with the use of various types of adsorbents was presented. The efficiency of the methylene blue removal process, with use of selected natural sorbents and activated carbons, was tested. The competitiveness of natural sorbents was shown. It was confirmed that these materials are efficient in removing coloured compounds from aqueous solutions.

Use of <i>Eichhornia Crassipes</i> as a Bioadsorbent for the Removal of Methyl Orange and Methylene Blue Present in Residual Solutions

“…The effect that occurs with the concentration of the adsorbent of the dyes on the removal percentage and adsorption capacity among them is mentioned in several works, e.g. reported by Bożęcka [2021] where they used walnut, sunflower and rice shells, obtaining a removal percentage of various dyes up to 99%. Kakhki [2020] observed that by modifying the amount of mass of its adsorbent in the solution, the removal percentage of MO increases until obtaining 90%, although this causes a significant decrease in the adsorption capacity.…”

“…Industries such as cosmetics, food, biomedicine, paper, and textiles use dyes to produce their products generating around 10 thousand tons/year of waste [Uddin et al, 2021;Amalraj et al, 2021;Kadhom et al, 2020]. This has caused several problems due to toxicity, low biodegradation on the entire ecosystem around this discharge of the dyes due to their direct interference in the photosynthesis process, in addition to causing various diseases to humans in the skin and respiratory system [Panneerselvam et al, 2021;Marquez et al, 2021;Amalraj et al, 2021;Bożęcka et al, 2021]. Dyes are divided into anionic (acid dyes), nonionic (dispersed) and cationic (basic dyes), among them are methyl orange (MO) and methylene blue (MB) which have a similar molecular mass [Kadhom et al, 2020;Lacin et al, 2020;Uddin et al 2021].…”

“…Dyes are divided into anionic (acid dyes), nonionic (dispersed) and cationic (basic dyes), among them are methyl orange (MO) and methylene blue (MB) which have a similar molecular mass [Kadhom et al, 2020;Lacin et al, 2020;Uddin et al 2021]. MB is a cationic dye used in different products as chemical, medical, and biological applications its chemical structure makes it difficult to remove [Amalraj et al, 2021;Bożęcka et al, 2021;Kadhom et al, 2020] and MO is an anionic dye that is used for dyeing and due to its poor biochemical purification it is very difficult to degrade [Zhang et al, 2019;Amalraj et al, 2021;Bożęcka et al, 2021]. Several methods have been proposed for the removal of various dyes: physicochemical (filtration, osmosis, dialysis, etc.…”

“…), although the latter, despite being quite efficient, are not used widely due to their high demand for chemical substances, and electrical energy, which makes these chemical methods very expensive [Saini et al, 2020;Zhang et al, 2019;Deng et al, 2020;Kadhom et al 2020]. Among the proposed methods, adsorption stands out, as it is a viable process due to its simple operation, easy regeneration, low cost and high efficiency in the treatment of wastewater containing dyes [Uddin et al, 2021;Márquez et al, 2021;Bożęcka et al, 2021].…”

Experimental Design Analysis of Murexide Dye Removal by Carbon Produced from Waste Biomass Material

“…ere are three types of dyes: anionic, cationic, and nonionic. Anionic dyes are classified as direct, acid, and reactive dyes, whereas cationic dyes can be considered basic dyes [6]. Recently, significant interest has centred on the elimination of dyes from wastewater due to their resistance to biodegradation and their hazardous nature [4].…”