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국산 Clinoptilolite를 이용한 암모니아 제거 특성에 관한 연구 Part1: Clinoptilolite의 특성 규명 및 회분식 반응기에서의 암모니아 제거 특성

A Study on Ammonia Removal Properties using Clinoptilolite Part 1: Characterization of Clinoptilolite and Ammonia Removal Properties in Batch Reactor

문정민 손덕지¹ 정종식^†

Jeong Min Moon Dezhi Sun¹ Jong Shik Chung^†

포항공과대학교 화학공학과/환경공학부 ¹하얼빈공업대학 응용화학부

Dept. of Chem. Eng./School of Environ. Eng., POSTECH, Korea ¹Dept. of Applied Chemistry, Harbin Institute of Technology, China

goodtime@postech.ac.kr

HWAHAK KONGHAK, April 2000, 38(2), 282-287(6), NONE

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Abstract

구룡포산 천연 제올라이트는 주성분이 clinoptilolite이며 heulandite와 mordenite가 혼재되어 있다. 나트륨으로 치환된 제올라이트의 암모니아에 대한 이온교환능력(CEC)은 1.41meq/g이다. 회분식 실험에서 clinoptilolite의 입자크기가 작아질수록, 그리고 초기 나트륨 농도가 낮을수록, SR, 반응시간, 초기 암모니아 농도가 증가할수록 암모니아 제거효율은 증가하였다. 약 3ppm 의 암모니아와 0.7ppm 의 알루미늄이 녹아있는 용액 처리시 암모니아 제거효율은 상대적으로 조금 떨어졌고 알루미늄 제거효율은 70%이상이었다. 폐제올라이트는 pH=12를 가진 염화나트륨 용액으로 SR가 2일 때 95% 이상의 재생효율을 보였다.

A natural zeolite, deposit located at Guryongpo, Young-il bay, was found to be clinoptilolite contatining impurities of heulandite and mordentie. Cation exchange capacity(CEC) for ammonia was about 1.41 meq/g from Na⁺ form of the zeolite. In batch experiment, removal efficiency of ammonia was increased as particle size of zeolite and initial concentration of Na⁺ were decreased and SR(Stoichiometric Ratio), time and initial concentration of ammonia increased. More than 70% aluminum ion could be removed from water having 3 ppm ammonia and 0.7ppm Al³⁺ by the batch adsorption (ion exchange) experiment. Regeneration of used zeolite with NaCl solution of pH=12 has shown more than 95% of regeneration efficiency when SR''(ratio of the amount of NaCl solution employed actually to the amount in a stoichiometric quantity) was equal to 2.0.

Keywords

Zeolite Clinoptilolite Ammonia Aluminium Adsorption Ion Exchange

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