Adsorption of Hg (II) in Biological and Environmental Samples onto Dithizone-Anchored Organobentonite

Zhang, Dong; Zhang, Yan Li

Paper Titles

Experimental Investigation on Vibration-Reduced Characteristics of Non-Obstructive Particle Damping for Free Beam Structure, p.867
Vertical Vibration Conveyor Vibration Testing, p.872
A Composite Approach of Sensorless Rotor Position Sensing for Brushless DC Motor, p.877
Determination of Trace Bismuth in Urine and Tap Water Samples by Atomic Absorption Spectrometry after Solid-Phase Extraction, p.884
Adsorption of Hg (II) in Biological and Environmental Samples onto Dithizone-Anchored Organobentonite, p.888
Solid-Phase Extraction Method for Preconcentration/Separation of Zinc Ion in Tap Water and Human Urine Using Organo-Bentonite Modified by Dithizone, p.892
Solid-Phase Extraction of Hg (II) by a Porous Nano-Barium-Strontium Titanate Microspheres from Blood and Urine Samples, p.896
Research on Methods of Tire Sensory Measurement Based on Image Processing, p.900
Comparison of Indoor Air Quality Measurement by Using Direct Detection Apparatus and Standard Methods, p.905

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Paper Title:

Adsorption of Hg (II) in Biological and Environmental Samples onto Dithizone-Anchored Organobentonite

Periodical	Advanced Materials Research (Volumes 230 - 232)
Main Theme	Frontiers of Manufacturing Science and Measuring Technology
Edited by	Ran Chen and Wenli Yao
Pages	888-891
DOI	10.4028/www.scientific.net/AMR.230-232.888
Citation	Dong Zhang et al., 2011, Advanced Materials Research, 230-232, 888
Online since	May, 2011
Authors	Dong Zhang, Yan Li Zhang
Keywords	Adsorption, Dithizone, Human Hair, Mercury, Organophilic Bentonite, Preconcentration, Tap Water
Price	US$ 28,-

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Abstract

A new method for the determination of traces of mercury in environmental and biological samples is described. The present methodology combines determined using a hydride generation-atomic absorption spectrometry (HG-AAS) with pre-concentration/separation of the analyte on dithizone-anchored organobentonite (D-O-bentonite). Optimal experimental conditions for the adsorption of the Hg, including pH, contact time, eluent concentration and volume and co-existing ions have been studied. The result showed that the mercury could be adsorbed on the D-O-bentonite. The adsorbed quantitively was affected by the pH value of medium and contact time. In the medium of pH 5.0, the adsorption time was 15 min, and capacity of adsorption was 23.2 mg·g^-1. The mercury adsorbed on the sorbent could be completely eluated by using 3 mol·L^-1 HCl. The adsorption agent has been applied to the pre-concentration/separation of mercury in surface water and human hair samples with satisfied results.