공업화학 (Applied Chemistry for Engineering)

  • 제24권4호
  • /
  • Pages.428-432
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  • 2013
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  • 1225-0112(pISSN)
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  • 2288-4505(eISSN)
한국공업화학회 (The Korean Society of Industrial and Engineering Chemistry)
권호 표지

폐향나무를 이용한 수용액에서 납 이온 제거

Removal of Lead Ions from Aqueous Solution Using Juniperus chinenensis Waste

  • 최석순 (세명대학교 바이오환경공학과)
  • Choi, Suk Soon (Department of Biological and Environmental Engineering, Semyung University)
  • 발행 : 2013.08.10
⟨ 이전 논문 다음 논문 ⟩

초록

충북의 산림지역에서는 목재의 가지치기에 의하여 다량의 폐목재가 발생되고 있으나, 이러한 폐목재들은 부산물로서 특정한 처리가 이루어지지 않고 있다. 본 실험에서는 폐목재(참나무, 향나무, 낙엽송, 소나무) 중에서 납 이온의 제거능력이 효과적인 생물흡착제로서 향나무를 도출하였다. 또한, 폐향나무를 사용하여 수중에 함유된 납의 제거 효율을 고찰하였다. 20 mg/L 납 이온의 제거 효율을 증가시키기 위한 최적의 초기 pH가 4임을 알 수 있었으며, 50 mg/L 납이온 제거를 향상을 위한 최적의 생물흡착제 주입농도가 0.6 g/100 mL임을 구하였다. 또한, 100 mg/L 이상의 고농도 납 이온의 흡착 능력을 향상시키기 위해서는 향나무의 황산 처리에 의한 화학적 개질 반응이 필요함을 알 수 있었다. 그리고 6 M 황산으로 개질된 향나무를 이용하여 200, 400, 500 mg/L의 납을 처리하였을 때, 납의 흡착량은 각각 180, 340, 425 mg/g를 나타내었다. 이러한 실험 결과들은 수중에 함유된 납 이온을 효과적으로 처리하는 실질적인 생물흡착제기술로 사용될 수 있을 것이다.

From the forest areas in Chungbuk, large amounts of wood wastes by pruning are generated, however most of them considered as by-products are not treated properly with no disposal options. In this work, among diverse wood wastes such as Quercus variabillis, Juniperus chinensis, Larix kaemoferi, and Pinus densiflora, Juniperus chinensis was found to be more effective biosorbent for the removal of lead ions than other wood wastes. Also, the enhancement of lead removal efficiency from the aqueous phase was investigated using Juniperus chinensis waste. It was observed that the optimal initial pH to increase the removal efficiency of 20 mg/L lead ions was 4.0 and the optimal dosage concentration with regard to the biosorbent for the enhanced removal of 50 mg/L lead ions was 0.6 g/100 mL. In addition, chemical treatment of Juniperus chinensis waste with sulfuric acid was required to improve the adsorption capacity for high lead concentrations (over 100 mg/L). When Juniperus chinensis waste was chemically treated with 6 M sulfuric acid, the adsorption quantities of lead ions were 180, 340, and 425 mg/g with regard to 200, 400, and 500 mg/L lead ions concentrations, respectively. These results indicate that the practical biosorbent technology developed in this study is a highly efficient method to treat the lead ion from an aqueous solution.

키워드

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