염화아연으로 표면개질된 입상활성탄의 질산성질소 흡착연구
Adsorption of nitrate-N onto ZnCl2-treated Granular Activated Carbon
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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.
Abstract
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.
참고문헌 (26)
- "고농도 질산 및 아질산성 질소 함유폐수의 생물학적 탈질에 관한 연구", 19(4), pp.446~454 (2005)
- "이온교환수지와 나노여과막을 이용한 질산성질소의 제거특성 비교", pp.171~176 (2006), 대한상하수도학회한국물환경학회 대구컨벤션센터
- "메조기공 실리카에 부착된 영가철을 이용한 질산성질소의 환원", 21(1), pp.139~147 (2007)
- "전기투석과 전기탈이온법에 의한 음용수에서의 질산성질소 제거", 21(1), pp.87~99 (1999), 대한환경공학회
- "질산성질소 제거를 위한 이온교환법 활용에 관한 연구", 11(2), pp.87~96 (1995), 한국물환경학회
- "2006년 지하수 수질측정망 운영결과" (2007), 환경부
- "Assessment and management of long-term nitrate pollution of ground water in agriculture dominated watersheds", 295, pp.225~245 (2004)
- "Nitrate in drinking water and risk of death from bladder cancer An ecological case control study in Taiwan", 70, pp.1000~1004 (2007)
- "Nitrate in public water supplies and the risk of colon and rectum cancers", 14(6), pp.640~649 (2003)
- "Removal of nitrate in drinking water by ion exchange- Impact on the chemical quality of treated water", pp.221~232 (1986)
- "Effects of low pH on nitrate reduction by iron powder", 38, pp.2631~2642 (2004)
- "Catalytic effects of zinc chloride in the pyrolysis of spanish high sulphur coals", pp.727~732 (1991)
- "Nitrate removal from drinking water A review", 123, pp.371~380 (1997)
- "Removal of chromium from dilute aqueous solutions by activated carbon developed from Terminalia arjuna nuts activated with zinc chloride", 60, pp.3049~3059 (2005)
- "Chemical denitrification of water by zero valent magnesium powder", B135, pp.112~121 (2006)
- "Nitrate contamination in private wells in rural Alabama United States", 346, pp.112~120 (2005)
- "Nitrate pollution of groundwater and associated human health disorders", 42, pp.28~39 (2000)
- "Preparation and characterization of activated carbons from terminalia arjuna nut with zinc chloride activation for the removal of phenol from wastewater", 44, pp.4128~4138 (2005)
- "Catalytic denitrification direct and indirect removal of nitrates from potable water", 66, pp.503~510 (2001)
- "Microporous structure of activated carbons as revealed by adsorption methods In Chemistry and Physics of Carbon", rodriguez-rei chapter 1(so) (1988)
- "Nitrate removal with reverse osmosis in a rural area in South Africa", 155, pp.15~26 (2003)
- "Adsorption of organic compounds", s(eyink), pp.781~876 (1990), McGraw-Hill Inc
- "Biological denitrification of groundwater", 123, pp.183~193 (2000)
- "Drinking water standards and health advisories", 822-B-00-001 (2000)
- "Workgroup report Drinking water nitrate and health Recent findings and research needs", 113, pp.1607~1614 (2005)
- "Pore and solid diffusion models for fixed bed adsorbers", pp.228~238 (1974)
