Abstract
The adsorption of lead (Pb II) ion on different types of synthesized zeolite was investigated. The BET surface area, total pore volume & average pore size distribution of these synthesized zeolites were determined by adsorption isotherms for N2, the surface area & total pore volume of their sources were found by adsorption isothermN2.The adsorption equilibrium was measured after 24h at room temperature (RT) & concentration 10mg.L-1 of Pb (II) was used. The adsorption of heavy metal Pb (II) on four different prepared zeolites (LTA from Montmorillonite clay, FAU(Y)-B.H (G2) from Barley husk, Mordenite (G1) from Chert rock, FAU(X)-S.C (G3) from shale clay & modified Shale clay by oxalic acid (N1) & sodium hydroxide (N2)), were compared with the adsorption of their sources by using static batch experimental method. The major factors affecting the heavy metal ion sorption on different synthesized zeolites & their sources were investigated. The adsorption equilibrium capacity (Qm) of Pb (II) ion for different synthesized zeolites ordered from (N1>N2>LTA>G3>G2>G1&for their sources ordered Shale clay >Montmorilonite> Barley husk>Chert rock. The atomic absorption spectrometry was used for analysis of lead heavy metal ion, the obtained results in this study showed that the different synthesized zeolites were efficient ion exchanges for removing heavy metal, in particular, the modified zeolite from shale clay by oxalic acid.
Highlights
Shale lithics might travel before they disintegrate, & what their potential contribution to fine-grained successions in the rock record might be
Leaching of the barley husk with a mineral acid followed by calcination in air leads to produce a white powder of barley husk silica (BHS) (Katsuki et al, 2005)
Absorbent each Zeolite &source 1.0 g was added to each test tube with 10 mL of the aqueous solution containing the concentration solutions of Pb (II) 10 mg.L-1
Summary
Shale lithics might travel before they disintegrate, & what their potential contribution to fine-grained successions in the rock record might be. Muds are common sediment on the earth surface & the precursors of fine grained clastic sedimentary rocks which are commonly known as shales or mudstones. Sources of water pollution of all kinds (industrial & agricultural wastes, sewage, etc.) present a grave concern for public health. Toxic components including heavy metals are of special concern because of their potential for long-term accumulation in soil & sediments. Heavy metals are not biodegradable & can accumulate in the environment & food chain, causing significant health risks. There are many heavy metal sources, including metal plating, mining operations, burning of fossil fuels, fertilizer industry, & textile industries, lead is one of the toxic metals & one of the major environmental pollutants present in drinking water & in air (Sitting, 1981). The main source of environmental lead pollution is the long use of leaded gasoline where higher concentrations of Pb(II) can still be found in soil & plant matter along the roadside, even in countries, where leaded gasoline was replaced many years ago (Roulier et al, 2008)
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