Adsorption of metal and uranyl ions onto amidoximated Pinus densiflora bark.
作者： Sung Phil Mun , Chang Sub Ku , Jae Phil Kim
DOI: 10.1007/S00226-009-0276-Z
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摘要: Pine (Pinus densiflora) bark was chemically modified by grafting with acrylonitrile (AN) through Fenton reaction and conversion of the cyano group to an amidoxime hydroxylamine. Treatments pine 160 mM H2O2 at 40°C yielded ~70% in 6-h reaction. After alkali hydrolysis amidoximated (AOPB), its adsorption capacity (q e) for copper ions largely increased from 0.5 1.8 mmol/g. Adsorption hydrolyzed AOPB (HAOPB) followed pseudo-second-order kinetic model. Among metal tested, order predicted model equilibrium time Hg2+ > UO2 2+ Cd2+ Cu2+ Zn2+ Ni2+. The process pH-dependent, observed pH range 6–7 all ions. Even though is a good adsorbent ions, it had poor affinity other tested. It obviously found that HAOPB very high abilities heavy uranyl
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