文档介绍：Adsorption of arsenic (III)
onto two iron-coated zeolites
Meng Xinxin Pan Yongzhang∗
Department of Environmental Engineering , Department of Environmental Engineering ,
jinan university, jinan university,
guangzhou,China guangzhou,China
zinlin0101@ ******@jnu.
Abstract-The applicability of two iron-coated zeolites e a global concern (elevated arsenic concentrations
prepared by alkalescent deposition and heating evaporation have been found in many regions in different parts of the
for the treatment of As(III) via adsorption processes was world[2]). Long-term intake of arsenic contaminated water
investigated. Scanning electron microscopy (SEM), X-ray is highly detrimental to human beings resulting in severe
diffraction spectroscopy (XRD) and BET were used to observe and permanent impairment of human health [3] .
the surface properties of the coated layer. The influences of
Arsenic exists in the −3, 0, +3 and +5 oxidation states. In
different sorption parameters such as contact time, dosing
natural water anic arsenic is usually found in the form of
quantity , initial arsenic concentration and solution pH were
As(III) as arsenite, and/or As(V) as arsenate. In the pH range
also studied thoroughly in order to optimize the reaction
of drinking water, the dominant arsenite species is neutral
this paper, various dosa