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Two novel adsorbents (AGD301 and ArgD301) were successfully prepared through ring-opening reaction. The adsorption performance and recognition selectivity of AGD301 and ArgD301 towards AuCl4− were studied by batch adsorption experiments. The results showed that adsorption time, pH, temperature and solution concentration had a significant influence on the adsorption performance. At 298 K and pH of 2, the equilibrium adsorption capacity of AGD301 and ArgD301 towards AuCl4− could reach 400.75 and 451.67 mg·g−1, respectively. In addition, AGD301 and ArgD301 possessed excellent selectivity and good reusability. [ABSTRACT FROM AUTHOR]

Amino acid functionalized D301 resins (Tyr-D301, Phe-D301, and Ala-D301) are successfully prepared to remove phenols. The influences of adsorption condition on adsorption ability and the practical application value are investigated. The functionalized D301 resins possess strong adsorption ability toward phenol by ways of hydrogen bond interaction. The adsorption capacity of Tyr-D301, Phe-D301, and Ala-D301 is 388.2, 368.4, and 321.5 mg· g−1 at 293 K and pH of 2, respectively. The adsorption process could be described satisfactorily by Lagergren-first-order model and Langmuir model. The rate constant is 0.057, 0.042, and 0.035 min−1, respectively. The functionalized D301 can be used to dispose wastewater containing phenols. [ABSTRACT FROM AUTHOR]

Graphical abstract The exhausted surface molecularly imprinted polymers (SMIP) could be effectively regenerated by 1 mol L−1 of hydrochloric acid aqueous solution, and the regenerative SMIP could be reused at least 10 times without significant reduction of adsorption capacity and selectivity coefficient. Highlights • A novel efficient surface imprinted technique is well designed. • The SMIPs possess strong adsorption ability and excellent recognization selectivity towards template. • The recognition selectivity of as-prepared SMIPs is higher than that of other IIPs. • The SMIPs have good chemical stability and reusability. Abstract In this paper, a novel surface molecularly imprinting technique with higher imprinting efficiency is well designed. It really realizes the synchronization of polymer crosslinking and template imprinting. Then the surface molecularly imprinted polymers (SMIPs) are synthesized using 2-nitrophenol (2-NP), 3-nitrophenol (3-NP), 4-nitrophenol (4-NP), and 4-methylphenol (4-MP) as template, respectively. The physicochemical characteristics of SMIPs are characterized by Fourier transform infrared spectroscopy (FTIR) and elemental analysis. The adsorption performances and recognization selectivity of SMIPs towards template are systematically investigated by batch method. The experimental results show that the SMIPs possess strong adsorption ability and excellent selectivity towards template. The selectivity coefficients of 2-NP, 3-NP, 4-NP and 4-MP relative to 4-chlorophenol (4-CP) are 132.2, 124.5, 157.3 and 37.8, respectively. The adsorption process could be well described by the Lagergren-first-order model and Langmuir-monolayer adsorption model. SMIPs have good chemical stability and reusability. The consecutive adsorption-desorption experiments show that the exhausted SMIPs could be effectively regenerated, and the regenerative SMIPs could be reused without significant reduction of adsorption capacity and selectivity coefficient. [ABSTRACT FROM AUTHOR]