New Modified Attapulgite for Arsenic Ions Adsorption by Atomic Fluorescence Spectrometry

doi:10.7517/issn.1674-0475.181207

Abstract

Abstract: Arsenic ion pollution has drawn great attention due to its severe destruction of water resources. In this work, attapulgite clay materials and its feasibility for the adsorption of arsenic ions have been investigated. The pH, contact time and initial concentration of arsenic ions were investigated by atomic fluorescence spectrometry on the iron oxide loaded attapulgite clay (Fe₂O₃/ATP). The prepared adsorbent was characterized by SEM, EDX and SEM-EDX mapping. At the same time, the adsorption kinetics and adsorption isotherm model of the prepared adsorbent are analyzed. The results show that the modified attapulgite has a significant increase in the adsorption of arsenic ions, and the adsorption efficiency can reach 98% at a lower concentration. The adsorption conforms to the Langmuir isotherm adsorption model and the pseudo-second-order kinetic equation.

Key words: atomic fluorescence spectrometry, attapulgite clay, iron oxide, arsenic ion, adsorption

LI Xiaoning, LI Meng. New Modified Attapulgite for Arsenic Ions Adsorption by Atomic Fluorescence Spectrometry[J]. Imaging Science and Photochemistry, 2019, 37(2): 127-135.

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