http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
양희만,황규선,박찬우,이근우,서범경,문제권 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
The nuclear accident at the Fukushima Daiichi nuclear power station in 2011 released a huge amount of radioactive cesium into natural environments. Although various Cs adsorbents have effective sorption property, they cannot be directly applied to natural environemnts because there is no easy way to collect them after use. In the study, we developed a magnetically separable adsorbent to remove the cesium from water. The magnetic nanocluster synthesized using a hydrothermal method, coated with silane-polyethyleneimine to immobilize Cu ions through metal coordination to amine groups in the PEI. Sodium-copper hexacyanoferrate was subsequently formed on the surfaces of the magnetic nanoparticles as Cu ions coordinated the hexacyanoferrate ions. The resulting magnetic nanocluster displayed an excellent saturation magnetization value. their maximum adsorption capacity for Cs was about 166 mg/g. Moreover, the adsorbent selectively adsorbed Cs even in the presence of competing cations.
양희만,박찬우,김일국,윤인호,최민기 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
We already reported that the encapsulation of elemental sulfur in the micropores of zeolites can remarkably increase the selectivity toward Cs. Although zeolites are well known adsorbents of various cationic elements including Sr and Cs, the Cesium and strontium ion-exchange property of sulfur encapsulated zeolite are not investigated. In this study, we determined Cs and Sr ion-exchange selectivity of sulfurencapsulated chabazite to evaluate their effectiveness for the decontamination of radioactive Cs and Sr from water. Detailed Cs and Sr ion-exchange studies revealed that the ion-exchange isotherms and kinetics could be effectively described by the Langmuir isotherm model and the pseudo-second-ordermodel, respectively. Most importantly, the sulfur-encapsulated chabazite exhibited excellent selectivity for Cs and Sr in simulated groundwater with a high removal efficiency exceeding 99.1%, indicating that the excellent potential for practical application.