NDLI: Lime-Amended Semi-arid Soils in Retaining Copper, Lead, and Zinc from Aqueous Solutions

Content Provider	Springer Nature Link
Author	Moghal, Arif Ali Baig Reddy, Krishna R. Mohammed, Syed Abu Sayeed Al Shamrani, Mosleh Ali Zahid, Waleed M.
Copyright Year	2016
Abstract	Most of the chemicals containing non-biodegradable metal pollutants from anthropogenic sources are highly mobile in nature. The only way to contain or limit their movement is through sorption and entrapment in the soil matrices. In this study, the sorptive response of the three most commonly found divalent metal contaminants, copper (Cu$^{+2}$), lead (Pb$^{+2}$), and zinc (Zn$^{+2}$), are studied using two locally available semi-arid soils from Saudi Arabia. To enhance their retention capacity, these soils are amended with lime. The response to sorption at varying initial contaminant concentrations, pH conditions, temperature levels, and dilution ratios are investigated. Relying on empirical models (Langmuir and Freundlich), the nature of sorption (monolayer or heterogeneous) is ascertained. Further, kinetic models are employed to validate the type and nature of sorption that occurs (whether pseudo first-order or second-order). It is found that the experimental results correlate well with these empirical models for both the Al-Ghat and Al-Qatif soils when amended with lime and attenuate Cu, Pb, and Zn to satisfactory levels. The R $^{2}$ values are close to 1 for all the tested models. The order of sorption was Pb > Cu > Zn for these heavy metals, and also for soils and soil mixtures that were considered: Al-Qatif soil amended with 6 % lime > Al-Ghat soil with 6 % lime > Al-Qatif > Al-Ghat. Lime-treated soils sorbed 73, 65, and 60 % more than the untreated soils for Pb, Cu, and Zn, respectively.
Starting Page	1
Ending Page	19
Page Count	19
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	227
Issue Number	10
e-ISSN	15732932
Language	English
Publisher	Springer International Publishing
Publisher Date	2016-09-07
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sorptionm Heavy metals Lime Temperature Kinetics Isotherms Environment Water Quality/Water Pollution Atmospheric Protection/Air Quality Control/Air Pollution Soil Science & Conservation Hydrogeology Climate Change/Climate Change Impacts
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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