Mechanism of Zinc Adsorption by Iron and Aluminum Oxides

Desalination study of physicochemical properties from soils in mechanic workshops within Okitipupa, Ondo state, Nigeria.

“…The pH values obtained in this study are in the same range with the values reported by [12][13][14], but lower than those reported by [15][16][17]. Soil pH and other soil properties are especially important in soil processes responsible for solubility of heavy metals in soil and their transportation [18][19][20][21][22]. The equilibrium between metal speciation, solubility, adsorption and exchange on solid phase sites is intimately connected to solution pH [18][19][20]15].…”

“…This relationship has been attributed to decreasing rates of organic matter decomposition at lower temperatures reducing mobilisation of organo-metal complexes [30]. In contrast, Kalbasi M did not observe any effect of temperature on Pb solubility [31]. Basta NT noted that variations in temperature had no measurable effect on the leaching of Cd [32].…”

“…Soil pH and other soil properties are especially important in soil processes responsible for solubility of heavy metals in soil and their transportation [18][19][20][21][22]. The equilibrium between metal speciation, solubility, adsorption and exchange on solid phase sites is intimately connected to solution pH [18][19][20]15]. Hence, numerous studies have found soil pH to have a large effect on metal bioavailability [21,22].…”

“…oxides of Al, Fe and Mn, play an important role in the availability of metals. Clays and hydrous oxides determine metal availability mainly by specific adsorption to surface hydroxyl groups [29,30], nonspecific adsorption (exchange) [31] [34][35][36][37][38][39] and precipitation as the discrete metal oxide or hydroxide [32] Hence, increasing clay and hydrous oxide contents in soils provides more sites for adsorption of metals thus reducing the directly bio available metal [33][34][35]. From the results, it can be inferred that adsorption of heavy metals on the soils due to artisans' activities in Okitipupa may be low and the transport of these metals are likely to occur.…”

Applying Ionizing Radiation to Metal Speciation for the Environmental Assessment of Underground Aquifer Associated with Technogenic Landfill Containing Sludge from A Water Treatment Plant (WTP)

“…However, this capacity becomes secondary in comparison to the action of iron, aluminum and manganese oxyhydroxides or even to the action of clayminerals in retaining metals in the soil or in sediments [1][2][3].…”