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Study on Adsorption of Pb and Cd in Water Using Carbonized Water Treatment Sludge

탄화 정수 슬러지를 이용한 수중의 납과 카드뮴 흡착에 관한 연구

  • Kim, Younjung (Center for Instrumental Analysis, Andong National University) ;
  • Kim, Daeik (School of Electrical, Electronic Communication, and Computer Engineering, Chonnam National University) ;
  • Choi, Jong-Ha (Department of Applied Chemistry, Andong National University) ;
  • Hong, Yong Pyo (Department of Applied Chemistry, Andong National University) ;
  • Ryoo, Keon Sang (Department of Applied Chemistry, Andong National University)
  • 김연정 (안동대학교 공동실험실습관) ;
  • 김대익 (전남대학교 전기전자통신컴퓨터공학부) ;
  • 최종하 (안동대학교 응용화학과) ;
  • 홍용표 (안동대학교 응용화학과) ;
  • 유건상 (안동대학교 응용화학과)
  • Received : 2017.02.01
  • Accepted : 2017.05.04
  • Published : 2017.10.20

Abstract

In this study, water treatment sludge carbonized with $400^{\circ}C$ was tested as an adsorbent for the removal of Pb and Cd in water. The carbonized sludge was characterized by thermo-gravimetric analysis (TGA), scanning electron microscopy (SEM), X-ray fluorescence spectrometry (XRF), and surface area analysis. Carbonized sludge exhibited much higher specific surface area and total pore volume than water treatment sludge itself. In batch-type adsorption process, carbonized sludge represented better adsorption performance for Pb than Cd, achieving 90~98% at the concentrations conducted in the experiments. Equilibrium data of adsorption were analyzed using the Freundlich and Langmuir isotherm models. It was seen that both Freundlich and Langmuir isotherms have correlation coefficient $R^2$ value larger than 0.95. The results of studies indicated that carbonized water treatment sludge by heat treatment could be used as an efficient adsorbent for the removal of Pb and Cd from water.

Keywords

Carbonized water treatment sludge;Adsorption;Isotherm;Pb;Cd

Acknowledgement

Supported by : 한국과학재단

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