Boron is one of the significant micronutrients for the plants; however, its excessive concentrations are lethal to plants. The accumulation of boron may cause damage to the liver, kidney, nervous system, respiratory system, digestive system, reproductive system and even threaten human life. Researchers consider using different methods to prepare boron chelating resins. In this work, two innovative, facile, and low‐cost methods were developed to prepare polystyrene-alcohol resins. The KDN and KLA resins had the highest adsorption capacity for boric acid in an aqueous solution at 288 K ,and the adsorption capacity was 36.17 mgand#183;g-1 and 43.47 mgand#183;g-1, respectively. The desorption percentages of boric acid on KDN and KLA resins were 90.75 % and 90.32 % respectively, by using 1 moland#183;L-1 HCl as an eluent. Therefore, KDN and KLA resins have the characteristics of a simple experimental process, large adsorption capacity, high elution rate, reusable, and low production cost. Therefore, it has a high commercial value and development prospects.
In this study, the thiol-functionalized resin (PMA-SH) was prepared directly by a one-step reaction of polymethyl acrylate resin (PMA) and 1,2-ethanedithiol, and it was applied to the adsorption of Pb 2+ , Ni 2+ , and Hg 2+ in aqueous solution. The effects of initial concentration, temperature, contact time, and electrolyte on the adsorption of Pb 2+ , Ni 2+ , and Hg 2+ were investigated. At 308 K, the saturated adsorption capacity of PMA-SH on Pb 2+ , Ni 2+ , and Hg 2+ is found to be 0.94, 0.88, and 0.41 mmol/g, respectively. In addition, the experimental adsorption data were consistent with the Redlich-Peterson model and pseudo-second-order kinetic model. Overall, PMA-SH exhibited good reuse performance as well as excellent adsorption performance for Pb 2+ , Ni 2+ , and Hg 2+ .
In the crystal structure of the title compound, C19H17FN4O2S, molecules are linked via pairs of N—H⋯N interactions, forming centrosymmetric dimers. Two intramolecular N—H⋯O hydrogen bonds stabilize the molecular conformation.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.