Sulfobetaine Cryogels for Preferential Adsorption of Methyl Orange from Mixed Dye Solutions

Abstract

New cryogels for selective dye removal from aqueous solution were prepared by free radical polymerization from the highly water-soluble crosslinker N,N,N’,N’-tetramethyl-N,N’-bis(2-ethylmethacrylate)-propyl-1,3-diammonium dibromide and the sulfobetaine monomer 2-(N-3-sulfopropyl-N,N-dimethyl ammonium)ethyl methacrylate. The resulting white and opaque cryogels have micrometer sized pores with a smaller substructure. They adsorb methyl orange (MO) but not methylene blue (MB) from aqueous solution. Mixtures of MO and MB can be separated through selective adsorption of the MO to the cryogels while the MB remains in solution. The resulting cryogels are thus candidates for the removal of hazardous organic substances, as exemplified by MO and MB, from water. Clearly, it is possible that the cryogels are also potentially interesting for removal of other compounds such as pharmaceuticals or pesticides, but this must be investigated further.

Carbon Adsorbents from Spent Coffee for Removal of Methylene Blue and Methyl Orange from Water

“…In spite of this, MO adsorption is slightly faster at very low adsorbent doses of 1 and 2 mg. These two experiments also show a slight tint of the glassware, indicating that, at very low dosages, the sample environment may also have an influence, similar to a recent study on MO and MB uptake using a hydrogel/3D printed hybrid setup [50]. Adsorbent doses above 2 mg do not exhibit this behavior, indicating that the adsorbent dominates the removal process as intended.…”

“…MO and MB are common model compounds for dyestuff-polluted aqueous media because they are (1) water-soluble and (2) easy to detect and quantify via UV/Vis spectroscopy. As some dyes are health hazards [ 50 , 51 , 52 , 53 ], MO and MB are suitable model cases for dye-contaminated water.…”

Innovative Magnetite Based Polymeric Nanocomposite for Simultaneous Removal of Methyl Orange and Hexavalent Chromium from Water

“…However, in wastewater from chromium electroplating, the Cr (VI) levels were found to reach 100 to 500 mg/L. Thus, the transformation of Cr (VI) to Cr (III) via an efficient reduction concept and the efficient adsorption of MO can greatly decrease the possible hazard of Cr (VI) and MO dye to animals, humans, and the environment [10,11]. Water contamination from chromium and dye has been widely remediated over the past years.…”

Synthesis of Polymer-Based Magnetic Nanocomposite for Multi-Pollutants Removal from Water

“…The adsorption technique is considered as the most effective treatment method due to several reasons such as its high removal efficiency, economic viability, and simple processing, which make it a cost-effective method for pollutant removal from water [ 16 , 17 , 18 ]. Recently, nanomaterials with exceptional properties [ 19 , 20 , 21 , 22 ] have been found to be useful in different fields, especially water treatment.…”