EFFECT OF NaOH ON A NATURAL ADSORBENT MODIFICATION: LEAD REMOVAL

7th International Scientific Conference - SGEM2007, www.sgem.org, SGEM2007 Conference Proceedings/ ISBN: 954-918181-2, June 11-15, 2007

ABSTRACT

This paper describes removal of Pb(II) ions from aqueous solutions using NaOH
modified pine barks (Pinus nigra). Chemical modification and its enhancement
effect on adsorption capacity for heavy metal treatment process have been
investigated in this article. Changes of the surface properties after modification
were examined by the FT-IR analysis. Maximum adsorption capacity was
49 mg/g at pH 8 and during about 180 min contact time (for 35 mg/L initial
concentration with 2.5 g/L solid-to-liquid ratio) These modification processes
also decreased soluble organic compounds from pine barks leading to increase
in chemical oxygen demand in water. Adsorption capacities of adsorbents
increased quietly as a result of modification according increase of adsorbent
surface activity.

Keywords: Industry, heavy metal, hazardous, toxicity, management,
wastewater.