Biosorption of Heavy Metal Ions onRhodobacter sphaeroidesandAlcaligenes eutrophusH16

✍ Scribed by Hideshi Seki; Akira Suzuki; Shin-Ichiro Mitsueda

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 141 KB
• Volume: 197
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1997.5284

✦ Synopsis

could not predict the influence of pH, which may be one of A fundamental study of the application of bacteria to the recovthe most important influencing factor, on biosorption. Only ery of toxic heavy metals from aqueous environments was carried a few studies dealt with the effect of pH on metal binding out. The biosorption characteristics of cadmium and lead ions to bacteria. Plette et al. (10) investigated the binding of were determined with purple nonsulfur bacteria, Rhodobacter calcium, cadmium, and zinc to the isolated cell walls of sphaeroides and hydrogen bacteria, Alcaligenes eutrophus H16 the Gram-positive soil bacterium Rhodococcus erythropolis that were inactivated by steam sterilization. A simplified version A177 at different concentrations of protons and competing of the metal binding model proposed by Plette et al. was used for metal ions. It is important to elucidate the metal-binding the description of metal binding data. The results showed that the biosorption of bivalent metal ions to whole cell bodies of the bactemechanism to the bacterial cell walls since it is the first step ria was due to monodentate binding to two different types of acidic in the biosorption of metal ions to bacteria. They proposed sites: carboxilic and phosphatic-type sites. The number of metal a multicomponent competitive binding model based on the binding sites of A. eutrophus was 2.4-fold larger than that of R. NICA (nonideal competitive adsorption) model (11, 12).

sphaeroides.