Adsorption of gentian violet dyes in aqueous solution on microporous AlPOs molecular sieves synthesized by ionothermal method

Removal of Anionic and Cationic Dyes Present in Solution Using Biomass of Eichhornia crassipes as Bioadsorbent

“…Waste from the textile, leather, plastic, printing, and food industries, among others, severely affects the world’s water resources, since huge amounts of water are consumed producing large volumes of liquid waste considered highly toxic, teratogenic, and carcinogenic [ 1 , 2 , 3 , 4 , 5 ]. Because they contain dyes for the aquatic world, due to their dark color they block sunlight, which causes the photosynthesis process that is essential for aquatic life, and their presence in aquifers can induce dyes to enter the chain food [ 3 , 4 , 5 , 6 , 7 , 8 ]. For these adverse effects on public health, causing mutation-related, teratogenic, and carcinogenic diseases, dye removal has attracted great attention [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 ].…”

“…Because they contain dyes for the aquatic world, due to their dark color they block sunlight, which causes the photosynthesis process that is essential for aquatic life, and their presence in aquifers can induce dyes to enter the chain food [ 3 , 4 , 5 , 6 , 7 , 8 ]. For these adverse effects on public health, causing mutation-related, teratogenic, and carcinogenic diseases, dye removal has attracted great attention [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 ]. Among these dyes are gentian violet (GV) a synthetic cationic dye also known as gentian violet ( Figure 1 a) [ 8 ].…”

“…On the other hand, biological treatment is not effective for this type of contaminant due to the low biodegradation of dyes [ 2 , 13 , 19 , 20 , 21 , 22 ]. Adsorption has shown to have some advantages over the mentioned methods due to its high efficiency in the removal of dyes from wastewater including dilute solutions, and the absence of sediment produced in its operation [ 4 , 12 , 19 , 23 , 24 , 25 , 26 ]. Different adsorbents have been synthesized for the removal of dyes from clays such as SBA-15, Bentonite, and other materials [ 2 , 4 , 17 , 27 , 28 , 29 ], up to the manufacture of activated carbon from different sources, however, there are large losses and high operating costs due to the possibility of pore blockage, hydroscoping, and incineration when using high temperatures [ 5 , 19 , 22 , 24 , 27 , 28 , 29 ].…”

“…Adsorption has shown to have some advantages over the mentioned methods due to its high efficiency in the removal of dyes from wastewater including dilute solutions, and the absence of sediment produced in its operation [ 4 , 12 , 19 , 23 , 24 , 25 , 26 ]. Different adsorbents have been synthesized for the removal of dyes from clays such as SBA-15, Bentonite, and other materials [ 2 , 4 , 17 , 27 , 28 , 29 ], up to the manufacture of activated carbon from different sources, however, there are large losses and high operating costs due to the possibility of pore blockage, hydroscoping, and incineration when using high temperatures [ 5 , 19 , 22 , 24 , 27 , 28 , 29 ]. These drawbacks have encouraged several researchers to study other cheap, abundant materials that have similar efficiency to materials synthesized by chemical processes, therefore the use of agro-industrial residues was considered, which are cheap and, easily available materials that only need a simple pretreatment and are materials with properties that can be exploited in another industry as well as being good candidates for the adsorption of various contaminants [ 8 , 12 , 14 , 19 , 22 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ].…”

Efficient and Enhanced Adsorption of Methylene Blue on Triethanolamine-Modified Graphene Oxide

“…Among them, adsorption has been widely used in wastewater treatment because it is a cost-effective and efficient method. − The synthesis of new materials with high adsorption capacity plays an important role in adsorption technology. Various materials, such as activated carbons, molecular sieves, carbon nanotubes, graphene, and graphene oxide (GO), have been reported as adsorbents for removing dye from aqueous media in the literature. In particular, carbon-based nanomaterials show promising application prospects in sewage treatment, and GO-based materials are considered to be attractive adsorbents as a result of the effective physical or chemical interactions between dye molecules and active sites of GO sheets. − …”