Boron removal by glucamine‐functionalized hydrogel beads in batch fashion

Abstract

In this study, poly(hydroxypropyl methacrylate) gel beads were synthesized, then it was functionalized to yield glucamine carrying hydrogel beads as a sorbent for boron uptake. The batch-mode sorption studies were performed to obtain the optimum resin concentration and pH for boron removal. The results showed that percent of boron removal increased with increasing amount of resin and reached 98% at 12 mg-resin/mL-solution. The boron removal did not effected much with the change of pH between 4 and 9. The boron adsorption isotherm is in good accordance with the Langmuir and Freundlich equations. The equilibrium adsorption amount of boron is 13.5 mmol g À1 at optimum conditions which is 5 to 50 times higher than the other boron selective adsorbents recorded in literature. Desorption studies showed that 100% elution is possible with HCl. As a conclusion the glucamine carrying hydrogel beads can be effectively used for uptake of boron from aqueous solutions because of their high boron adsorption capacity and reusability.

Macro- and Micronutrient Simultaneous Slow Release from Highly Swellable Nanocomposite Hydrogels

“…There is little published data on the controlled release of micronutrients from hydrogels. Although some authors studied hydrogel interactions with boron, − no previous works dealing with hydrogels as boron carriers were found in the literature.…”

Synthesis of polyaminostyrene‐based and polyallylamine‐based sorbents for boron removal

“…The sorbents with amino hydroxyl functional groups behaved in a similar way with the change in pH. 15,25,43,44 It is noteworthy that there was a difference in the sorption properties of PHAS and PHAA both in acidic and alkaline media (Figure 2). This difference obviously characterized the influence of the distance between the amino group and the hydroxyl groups on the boron ion sorption.…”

“…Thus, for the formation of new highly effective sorbents, it is not only the nature of polymer backbone that is important but also the methods for its preparation and further functionalization. Despite the wide range of available sorbents of boron, [6][7][8]18,[24][25][26] further development in this direction is impossible without a deeper understanding of the structure-property correlation and systematic studies of the effect of functional fragment structure and degree of substitution on the sorption characteristics. Furthermore, even though the high boronbinding ability of polyol compounds or saccharides is known, little attention has been paid to the influence of the polymer backbone structure on the boron sorption properties.…”

“…[1][2][3][4] For instance, the introduction of the residues of polyol compounds into the polymer matrix allows one to obtain boron-specific sorbents because the vicinal diol functions help form chelates of four-coordinate boron. 5 The sorbents of boron known today, especially commercial ones, are formed on polystyrene, [6][7][8][9][10][11][12][13][14] polyallylamine (PAA), 15 polyethyleneimine (PEI), 16,17 chitosan, [18][19][20][21][22] and polymetacrylic acid [23][24][25][26][27][28] as a polymer matrix. Such a wide range of polymers is essential for the preconcentration and determination of boron with atomic absorption spectrometry and other spectroscopic techniques, 18,19 the recovery of boron from leaching and other technological solutions to semimetal resource utilization, [20][21][22]28 and the decontamination of natural and wastewaters from boron compounds.…”

Removal of boron from aqueous solution using magnetic carbon nanotube improved with tartaric acid

“…For treatment of boron in aqueous solution through adsorption process, different materials have been used as adsorbent such as activated carbon (AC) [ 10 ], fly ash [ 11 ], resins [ 12 ], metal oxides [ 13 ], clay materials [ 14 ], and composite magnetic particles [ 15 ].…”