Premium
Removal of cadmium or lead from polluted water by biological amphiphiles
Author(s) -
Pekdemir Turgay,
Tokunaga Shuzo,
Ishigami Yutaka,
Hong KyungJin
Publication year - 2000
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-000-0111-6
Subject(s) - tannic acid , chemistry , cadmium , nuclear chemistry , amphiphile , metal , chromatography , environmental chemistry , organic chemistry , polymer , copolymer
Abstract Biological amphiphiles were examined for the removal of Cd 2+ or Pb 2+ from polluted water within a pH range from 2.5 to 7.5 at a fixed ratio of amphiphilic concentration to heavy metal concentration ( C A / C M ) on a molar basis of approximately 11. Tannic acid, among eight amphiphiles, was selected for Cd 2+ or Pb 2+ removal because it exerted noticeable improvement within limited pH ranges. In the presence of tannic acid, the removal of Cd 2+ or Pb 2+ was investigated as a function of pH ranging from 2.5 to 13 at C A / C M ratios from 1.2 to 11. The removal capacity (mass of metal/mass of tannic acid) increased with decreasing C A / C M for both Cd 2+ and Pb 2+ . Removal capacities were 0.084 and 0.154 g/g‐tannic acid for Cd 2+ and Pb 2+ at pH 6.9 and 4.4, respectively. The maximal removals for Cd 2+ and Pb 2+ were 99 and 96%, respectively.