alexa Sorption of lead, copper, cadmium, zinc, and nickel by marine algal biomass: characterization of biosorptive capacity and investigation of mechanisms.
Agri and Aquaculture

Agri and Aquaculture

Journal of Aquaculture Research & Development

Author(s): Sheng PX, Ting YP, Chen JP, Hong L

Abstract Share this page

Abstract The marine algae Sargassum sp., Padina sp., Ulva sp., and Gracillaria sp., harvested locally, were investigated for their biosorption performance in the removal of lead, copper, cadmium, zinc, and nickel from dilute aqueous solutions. It was found that the biosorption capacities were significantly affected by solution pH, with higher pH favoring higher metal-ion removal. Kinetic and isotherm experiments were carried out at the optimal pH: at pH 5.0 for lead and copper, and at pH 5.5 for cadmium, zinc, and nickel. The metal removal rates were rapid, with 90\% of the total adsorption taking place within 60 min. Sargassum sp. and Padina sp. showed the highest potential for the sorption of the metal ions, with the maximum uptake capacities ranging from 0.61 to 1.16 mmol/g for Sargassum sp. and 0.63 to 1.25 mmol/g for Padina sp. The general affinity sequence for Padina sp. was Pb>Cu>Cd>Zn>Ni, while that for Sargassum sp. was Pb>Zn>Cd>Cu>Ni. XPS and FTIR analysis of Sargassum sp. and Padina sp. revealed the chelating character of the ion coordination to carboxyl groups. It was confirmed that carboxyl, ether, alcoholic, and amino groups are responsible for the binding of the metal ions. This article was published in J Colloid Interface Sci and referenced in Journal of Aquaculture Research & Development

Relevant Expert PPTs

Recommended Conferences

Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

 
© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
adwords