search for




 

The Uranium Removal in Groundwater by Using the Bamboo Charcoal as the Adsorbent
대나무 활성탄을 흡착제로 활용한 오염지하수 내 우라늄 제거
Econ. Environ. Geol. 2018 Dec;51(6):531-42
Published online December 31, 2018;  https://doi.org/10.9719/EEG.2018.51.6.531
Copyright © 2018 the Korean society of economic and environmental gelology.

Jinkyun Lee, Taehyoung Kim and Minhee Lee*
이진균 ·김태형 ·이민희*

Department of Earth Environmental Sciences, Pukyong National University
부경대학교 지구환경과학과
Received December 15, 2018; Accepted December 19, 2018.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
Batch sorption experiments were performed to remove the uranium (U) in groundwater by using the bamboo charcoal. For 2 kinds of commercialized bamboo charcoals in Korea, the U removal efficiency at various initial U concentrations in water were investigated and the optimal sorption conditions to apply the bamboo charcoal were determined by the batch experiments with replicate at different pH, temperature, and reaction time conditions. From results of adsorption batch experiments, the U removal efficiency of the bamboo charcoal ranged from 70 % to 97 % and the U removal efficiency for the genuine groundwater of which U concentration was 0.14 mg/L was 84 %. The high U removal efficiency of the bamboo charcoal maintained in a relatively wide range of temperatures (10 ~ 20 oC) and pHs (5 ~ 9), supporting that the usage of the bamboo charcoal is available for U contaminated groundwater without additional treatment process in field. Two typical sorption isotherms were plotted by using the experimental results and the bamboo charcoal for U complied with the Langmuir adsorption property. The maximum adsorption concentration (qm: mg/g) of A type and C type bamboo charcoal in the Langmuir isotherm model were 200.0 mg/g and 16.9 mg/g, respectively. When 2 g of bamboo charcoal was added into 100 mL of U contaminated groundwater (0.04 ~ 10.8 mg/L of initial U concentration), the separation factor (RL) and the surface coverage (θ) maintained lower than 1, suggesting that the U contaminated groundwater can be cleaned up with a small amount of the bamboo charcoal.
Keywords : bamboo charcoal, uranium, radionuclide, radioactive contamination, groundwater remediation

 

April 2019, 52 (2)