Article

Ammonia adsorption on bamboo charcoal with acid treatment

Faculty of Applied Life Sciences, Niigata University of Pharmacy and Applied Life Sciences, 956– 8603, Niigata, Niigata, Japan; Faculty of Applied Life Sciences, Niigata University of Pharmacy and Applied Life Sciences, 956–8603, Niigata, Niigata, Japan
Journal of Health Science 01/2006; 52:585-589. DOI: 10.1248/jhs.52.585

ABSTRACT The effect of ammonia adsorption in aqueous solutions was examined for bamboo charcoal carbonized at 400, 700 and 1000°C, and activated carbon. Furthermore, the change of the ammonia adsorption in aqueous solutions was also examined by treatment of each sample with diluted sulfuric acid. Bamboo charcoal carbonized at 400°C and treated with diluted sulfuric acid was the most effective for removing ammonia from aqueous solutions. Al-though the ammonia adsorption of the bamboo charcoal carbonized at 400°C in gas phase hardly changed by the treatment with diluted sulfuric acid, that in aqueous solutions significantly increased by the treatment. duced and removing ammonia all year around is needed. Many reports have describes the adsorption of ammonia gas by activated carbon and charcoal. 7–19) The charcoal carbonized from 400 to 500°C is found effective for the adsorption of basic ammonia gas due to many acidic functional groups on its sur-face. 7–11) It is also described that the adsorption amount of the ammonia gas on activated carbon in-creases by modifying the acidic functional groups on the surface of the activated carbon with an oxi-dizing reagent. 20,21) In aqueous solutions, properties differing from the gas phase are expected because ammonia with a high solubility in water is easily soluble and NH 4 + is formed on the basis of the solu-tion of pH. However, the properties of the ammonia adsorption in aqueous solutions have not been re-ported except for ammonia adsorption in the gas phase on activated carbon and charcoal. In this study, the relation between the carbonization temperature and ammonia adsorption was examined in order to effectively remove ammonia from aqueous solutions. Furthermore, the improvement of the adsorption capacity of ammonia by treatment with dilute acid was examined.

1 Bookmark
 · 
372 Views
  • [Show abstract] [Hide abstract]
    ABSTRACT: Injection moulded bamboo charcoal (BC) particles were used to reinforce Polylactic Acid (PLA) polymer to enhance its mechanical properties. It was found that by increasing small amount of BC particles into PLA would enhance its impact strength, tensile strength and modulus of elasticity. The formation of mirror, mist and hackled zones of PLA/BC samples observed under fractographic images through an optical microscopy has explained their energy absorption mechanism. To achieve better mechanical properties of PLA/BC composites with the consideration of ease of manufacturing, it was found that the optimal percentage of BC particles for PLA/BC composites is 7.5 wt%.
    Materials Letters 12/2014; 136:122–125. · 2.27 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper presents results that illustrate the recycling of a bamboo derived sorbent used for the capture of elemental mercury (Hg 0). The bamboo derived sorbent used is essentially a HCl functionalized activated carbon prepared from carbonization and CO 2 activation of raw bamboo, that could potentially provide an alternative way to existing methods in removing mercury from flue gases from coal-fired plants. In this study, the bamboo derived sorbents were tested in a batch test using a mercury permeation tube as the source and nitrogen as a carrier gas. The recycling or regeneration of an activated carbon is an important issue to address from a coal-fired power plant point of view, and an attempt has been made to test the behavior of bamboo derived sorbents with various treatments including carbonized, carbonized-activated, carbonized-activated-acidulated, and then a follow-up recycled run after sample treatments in gas phase. From the study, it was found that bamboo derived activated carbon can be successfully acidulated using various normalities of HCl where weak solutions can be very effective in functionalizing the surface of the sorbent and capturing mercury. In order to recycle and reuse bamboo derived sorbents, stronger normalities of HCl would be desired.
  • Source

Full-text

Download
14 Downloads
Available from