Abstract
This study was conducted to increase the adorption capacity of microporous carbon which is widely used as an adsorbent. After increasing the adsorption capacity of microporous carbon by heat-treatment, chromium($Cr^{+6}$) solution, which is the one of hazardous heavy metals, was selectively adsorbed on microporous carbon. Optimum temperature range for the heat-treatment of microporous carbon was $340{\sim}350^{\circ}C$, and the average specific surface area was measured as $1380m^2/g$ by BET (Brunauer-Emmett-Teller) method. The weight loss was about 10 percents during the heating to optimum temperature. However, It became a qualitative adsorbent due to a larger specific surface area. Removal of chromium($Cr^{+6}$) in solution by heat-treated microporous carbon was successfully carried out.
흡착제로 널리 쓰이는 다공성탄소의 흡착성능을 증가시키는 연구를 수행하였다. 열처리에 의하여 다공성탄소의 흡착성능을 증가시킨 후, 유해중금속의 일종인 $Cr^{+6}$의 선택적 흡착을 시행하였다. 다공성탄소의 적정 열처리 온도는 $340{\sim}350^{\circ}C$가 가장 적절하였으며, 이때의 평균 비표면적은 Brunauer-Emmett-Teller(BET) 방법에 의해 $1380m^2/g$로 측정되었다. 열처리 과정에서 전체중량의 약 10%의 감소가 있었으나, 비표면적의 증가로 고품질의 흡착제가 되었다. 또한 열처리된 다공성탄소에 의하여 액상에서의 $Cr^{+6}$의 제거가 성공적으로 수행되었다.
