한국폐기물자원순환학회지 제35권 제3호 (p.227-235)

1-vinyl imidazole 광그라프트 중합과 사차화를 통한 흡착/항균 기능성 섬유상 여재의 제조(II) : 질산성 질소 흡착특성

Preparation of Fibrous Filter Medium with Adsorption/Antibacterial Property by Photoinduced Graft Polymerization of Vim and Subsequent Quaternization(II) : Adsorption Property for Nitrate
키워드 :
Nitrate,Adsorption,Photografting polymerization,1-vinyl imidazole,Quarternization

목차

Abstract
I. 서 론
II. 실험재료 및 방법
  1. 흡착제 제조
  2. 흡착실험 및 분석
III. 결과 및 고찰
  1. 회분식 흡착실험
  2. 고정층 칼럼식 흡착실험
IV. 결 론
References

초록

The PP-g-Vim-CH3I adsorbent, which possesses antibacterial and ion-exchange functions, was synthesized by photoinduced grafting of 1-vinyl imidazole (Vim) onto polypropylene, non-woven fabric and subsequent quaternization using methyl iodide (CH3I). The adsorption properties of PP-g-Vim-CH3I for nitrate ion were studied in batch mode and fixed-bed columns. The adsorption equilibria of NO3-N on PP-g-Vim-CH3I were well described by the Langmuir isotherm model, and the adsorption energy was 9.03 kJ/mol, which indicates an ion-exchange process. Adsorption-kinetic data were fitted with a pseudo-second-order kinetic model. The Bohart-Adams model was found to be suitable for simulating the breakthrough curves obtained from the fixed-bed columns. The fixed-bed sorption capacity of nitrate ion from the model was in the range 100.8 ~ 108.6 mg/g without the presence of competing anions but decreased to the range 55.7 ~ 96.2 mg/ g in groundwater due to adsorption competition with the coexisting anions, especially SO4 2− ion. The PP-g-Vim-CH3I adsorbent could be regenerated by washing with 1.0 N NaCl without serious lowering the adsorption capacity.