수중의 질산성질소 제거를 위한 흡착연구를 염화아연(ZnCl2)으로 표면개질한 코코넛 입상활성탄(Granular Activated Carbon, GAC)을 이용하여 수행하였다. 질산성질소 제거를 위한 최적조건은 200%의 화학적 무게 비율과 500℃의 탄화 온도로 결정되었다. 염화아연으로 표면개질한 활성탄과 표면개질하지 않은 활성탄의 질산성질소 흡착능력을 비교한 결과 염화아연으로 개질한 활성탄의 질산성질소 흡착수용력(0.1645 mmol/g)이 표면개질하지 않은 활성탄의 흡착수용력(0.0274 mmol/g)보다 월등히 높은 것으로 나타났다. 염화아연으로 표면개질된 코코넛 활성탄의 질산성질소 흡착특성은 접촉시간, 질산성질소의 초기농도, 온도의 다중변수 함수로서 조사되었다. 흡착평형은 1시간 이내에 이루어졌으며 질산성질소 흡착결과는 Langmuir 흡착 등온식으로 가장 적합하게 모사되었다. 염화아연(ZnCl2)으로 표면개질된 코코넛 입상활성탄은 음용수에서 질산성질소 제거를 위한 흡착제로서의 가능성을 보여준다.
수중의 질산성질소 제거를 위한 흡착연구를 염화아연(ZnCl2)으로 표면개질한 코코넛 입상활성탄(Granular Activated Carbon, GAC)을 이용하여 수행하였다. 질산성질소 제거를 위한 최적조건은 200%의 화학적 무게 비율과 500℃의 탄화 온도로 결정되었다. 염화아연으로 표면개질한 활성탄과 표면개질하지 않은 활성탄의 질산성질소 흡착능력을 비교한 결과 염화아연으로 개질한 활성탄의 질산성질소 흡착수용력(0.1645 mmol/g)이 표면개질하지 않은 활성탄의 흡착수용력(0.0274 mmol/g)보다 월등히 높은 것으로 나타났다. 염화아연으로 표면개질된 코코넛 활성탄의 질산성질소 흡착특성은 접촉시간, 질산성질소의 초기농도, 온도의 다중변수 함수로서 조사되었다. 흡착평형은 1시간 이내에 이루어졌으며 질산성질소 흡착결과는 Langmuir 흡착 등온식으로 가장 적합하게 모사되었다. 염화아연(ZnCl2)으로 표면개질된 코코넛 입상활성탄은 음용수에서 질산성질소 제거를 위한 흡착제로서의 가능성을 보여준다.
Adsorption study with zinc chloride (ZnCl2) treated coconut granular activated carbon (GAC) for nitrate removal from water has been carried out. Experimental results reveal that chemical weight ratio of 200% and temperature of 500℃ were found to be optimum for the maximum removal of nitrate from wat...
Adsorption study with zinc chloride (ZnCl2) treated coconut granular activated carbon (GAC) for nitrate removal from water has been carried out. Experimental results reveal that chemical weight ratio of 200% and temperature of 500℃ were found to be optimum for the maximum removal of nitrate from water. The comparison between virgin and ZnCl2-treated GAC indicates that treatment with ZnCl2 has significantly improved the adsorption efficacy of virgin GAC. The adsorption capacities of virgin and ZnCl2-treated coconut GACs were found 0.0274 and 0.1645 mmol/g, respectively. The adsorption of nitrate on ZnCl2-treated coconut GAC was studied as a function of contact time, initial concentration of nitrate and temperature. The kinetic study reveals that equilibrium was achieved within one hour. The adsorption data conform best fit to the Langmuir isotherm. Results of the present study recommend that adsorption process using ZnCl2-treated coconut GAC shows promising possibility for nitrate removal from drinking water.
Adsorption study with zinc chloride (ZnCl2) treated coconut granular activated carbon (GAC) for nitrate removal from water has been carried out. Experimental results reveal that chemical weight ratio of 200% and temperature of 500℃ were found to be optimum for the maximum removal of nitrate from water. The comparison between virgin and ZnCl2-treated GAC indicates that treatment with ZnCl2 has significantly improved the adsorption efficacy of virgin GAC. The adsorption capacities of virgin and ZnCl2-treated coconut GACs were found 0.0274 and 0.1645 mmol/g, respectively. The adsorption of nitrate on ZnCl2-treated coconut GAC was studied as a function of contact time, initial concentration of nitrate and temperature. The kinetic study reveals that equilibrium was achieved within one hour. The adsorption data conform best fit to the Langmuir isotherm. Results of the present study recommend that adsorption process using ZnCl2-treated coconut GAC shows promising possibility for nitrate removal from drinking water.
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