Mineral and chemical changes of sediments after Cu sorption and then desorption induced by synthetic root exudate

Kanbar, Hussein; Kaouk, Malak

doi:10.1016/j.chemosphere.2019.124393

Cited by 11 publications

(7 citation statements)

References 51 publications

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“…The normal SRE composition used in this study, named "S", was based on Huang et al (2017). This SRE was proven to selectively desorb metals (Kanbar and Kaouk, 2019). The other 6 SRE solutions had different concentrations of oxalic acid (OA), citric acid (CA), and malic acid (MA) since these LMWOAs are the main components depicting metal behavior.…”

Section: Synthetic Root Exudate Compositionmentioning

confidence: 99%

“…The behavior of metals or nutrients depends on the physico-chemical, organic, metal, and mineral characteristics of technosols . Weathering of mineral surfaces (Kanbar and Kaouk, 2019) and forming dissolved or particulate organo-mineral complexes (Violante and Caporale, 2015) are some of the processes that depict metal behavior. Therefore, metal behavior in matrices, including technosols, can only be understood by taking into consideration these changes in addition to the SRE characteristics (composition and concentration).…”

Section: Introductionmentioning

confidence: 99%

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Selective metal leaching from technosols based on synthetic root exudate composition

Kanbar

Matar

Safa

et al. 2020

Journal of Environmental Sciences

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Section: Synthetic Root Exudate Compositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Selective metal leaching from technosols based on synthetic root exudate composition

Kanbar

Matar

Safa

et al. 2020

Journal of Environmental Sciences

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“…Furthermore, DRIFT, and other vibrational spectroscopy data, can be treated by decomposing spectra into resolved components (Felten et al 2019), which can then be used to detect minor mineral, chemical, and organic variations. Moreover, XRD and infrared techniques can be used in combination to follow changes in mineral properties, such as precipitation, intercalation of water molecules and ions, dissolution, swelling, and weathering (e.g., Lindholm et al 2019;Kanbar and Kaouk 2019). Infrared spectroscopy is commonly used in connection to other geochemical techniques, such as XRD and electron microscopy, to reveal further information (e.g., Ammar et al 2016;Le Meur et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Tracking mineral and geochemical characteristics of Holocene lake sediments: the case of Hotagen, west-central Sweden

Kanbar

Olajos

et al. 2021

J Soils Sediments

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Purpose Intact lake sediments reflect the development of terrestrial ecosystems. This development can be understood by decoding mineral and geochemical information of sedimentary archives. Therefore, we characterized a Holocene lake sediment core and revealed bulk to micro-scale variations via a combination of geochemical techniques and statistical methods. Methods A 2.3 m sediment core was collected from Hotagen, a lake in west-central Sweden; a sediment sample was collected every 5 cm. A part of each sediment sample was kept untreated (named bulk) and another part was size-fractionated into < 4, 4–16, 16–64, and > 64 µm subsamples. Characterization was then made with respect to grain size distribution (GSD), physico-chemical parameters, geochemical properties, organic composition, and mineralogy. The sediments were investigated at bulk, micro-, and elemental scales using powder X-ray diffraction (XRD), diffuse reflectance infrared Fourier transform spectroscopy (DRIFT), and scanning electron microscopy coupled to energy-dispersive X-ray spectroscopy (SEM–EDX). Results The deepest sediment was identified as glacial till dating back to the Late Pleistocene. The bulk sediments showed a clear distinction between 0–195 cm (unit 1, U1) and 200–225 cm (unit 2, U2) depths. Quartz and feldspar minerals decreased and organic matter and clay minerals increased from the till towards the lower limit of U1. The development in the sedimentary properties marked the transformation of the terrestrial ecosystem from glacier-covered land to vegetated areas. This development was also well reflected by the appearance of X-ray amorphous materials and the formation of distinct organo-mineral aggregates; chlorite was the predominant clay mineral in these aggregates. The geochemical variation between U2 and U1 sediments was further established by resolving the DRIFT spectral components through multivariate curve resolution alternating least square (MCR-ALS). The U1 sediments settled over a period of ~ 7500 years and showed comparable mineral, geochemical, and organic composition. However, the size-fractionated sediments, mainly < 4 µm, showed diverse mineral and geochemical composition. Indeed, these sediments were distinct by containing relatively higher amounts of X-ray amorphous materials and clay minerals, the latter had variable Na, Mg, and K contents. Conclusion The combined use of geochemical and statistical approaches used in this study followed the mineral and geochemical development of sediments that had settled during the Late Pleistocene and Early Holocene Epochs. Finally, the U2 sediments marked the terrestrial ecosystem development that occurred during the late glaciation, deglaciation, and post-glaciation periods. Graphical abstract

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“…Nowadays, the increasing pollution of water resources has been a major environmental problem. Potentially toxic metals may enter the environment from many sources, including metal enrichment, mining, automotive emissions, industrial emissions, fertilizers, pesticides, industrial effluent dyes, wastewater irrigation, and sewage sludge (Lu and Gibb, 2008;Tahervand and Jalali, 2017;Kanbar and Kaouk, 2019;Rechberger et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Mobilization or leaching potential, in turn, occurs as a function of the complex interactions (for example sorption and desorption) between HMs and the environmental matrix. These interactions depend on the chemical state of the metal and the physicochemical properties of the soil, such as pH, redox potential, soil colloids, mineralogy, cation exchange capacity, ionic strength, particle size, and organic matter content (Du et al, 2018;Shaheen et al, 2018;Fariña et al, 2018;Kanbar and Kaouk, 2019). The use of sorption isotherm to describe sorption phenomena is essential for the correlation between its parameters and the physicochemical attributes of the soil (Covelo et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Sorption studies of Cd and Cu on Brazilian alluvial soils

Barros¹,

Coutinho²,

Alves³

et al. 2021

Rev. ambiente água

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The Local Production Arrangement, located in the Pernambuco’s Agreste state, has been significantly developing the region's economy. Despite its importance, industrial activity has caused relevant environmental concerns regarding the disposal of textile effluents, especially from industrial laundries. This waste is made up of many chemicals, and among them are various types of heavy metals. The evaluation of the sorption behavior of contaminant transport mechanisms such as heavy metals is essential to assess the risk of contamination of alluvial aquifers. This study evaluated the sorption of heavy metals (Cu and Cd) in an alluvial sediment deposit in the Capibaribe River. Kinetics and isotherm experiments allowed the analyses of Cu and Cd sorption. Kinetics sorption showed an equilibrium tendency after 16 h for Cu and 18 h for Cd and was better described by a pseudo-second order model. The isotherm data were adjusted to the Linear, Freundlich and Langmuir models. Both linear and Freundlich models satisfactorily described sorption isotherms for the two pollutants. The metals in the study represent a risk of contamination of the groundwater of alluvial aquifers, mainly due to physicochemical attributes of the soil, such as high sand content (85%), low MO (2.1 g kg-1) and alkaline pH (8.2). The environmental conditions decrease absorption and facilitate metal mobility, greatly increasing the environmental risks inherent in pollutant leaching. Cu showed a higher affinity with the soil studied in all assays performed compared with the results of the tests for Cd.

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Mineral and chemical changes of sediments after Cu sorption and then desorption induced by synthetic root exudate

Cited by 11 publications

References 51 publications

Selective metal leaching from technosols based on synthetic root exudate composition

Selective metal leaching from technosols based on synthetic root exudate composition

Tracking mineral and geochemical characteristics of Holocene lake sediments: the case of Hotagen, west-central Sweden

Sorption studies of Cd and Cu on Brazilian alluvial soils

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