Adsorption of Pb2+, Cd2+ and Sr2+ ions onto natural and acid-activated sepiolites

Lazarević, Slavica; Janković-Čaštvan, Ivona; Jovanović, D.; Milonjić, Slobodan K.; Janaćković, Djordje; Petrović, Rada

doi:10.1016/j.clay.2006.11.008

Cited by 219 publications

(137 citation statements)

References 26 publications

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“…That band is very sensitive to acid attack and changed its form, which clearly shows the textural changes in the solids. These observations are in agreement with Lazarević et al's (2007) results. But it is observed that bands of calcite and dolomite at 2872, 2521, 1798, 1421 and 875 cm −1 are absent in the AS, because calcite and dolomite were almost removed by acid-treatment.…”

Section: Resultssupporting

confidence: 95%

Effect of sepiolite fibers addition on sintering behavior of sanitary bodies

Liang

Wang

et al. 2015

Applied Clay Science

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Section: Resultssupporting

confidence: 95%

Effect of sepiolite fibers addition on sintering behavior of sanitary bodies

Liang

Wang

et al. 2015

Applied Clay Science

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“…Batch experiments were performed using solutions of Pb(NO 3 ) 2 , Cd(NO 3 ) 2 and Sr(NO 3 ) 2 with a concentration of 0.01 mol/dm 3 , at a ratio sepiolite to electrolyte solution of 0.05 g:25 cm 3 . It was observed that retention of Pb 2+ and Cd 2+ occurred by adsorption and Mg 2+ ion exchange from sepiolite structure while electrostatic forces were main cause for retention of Sr 2+ ions onto the surface of sepiolites [15]. Jiang and coworkers studied kaolinite clay obtained from Longyan, China for Pb(II), Cd(II), Ni(II) and Cu(II) uptake from wastewater.…”

Section: Physical Methods Of Heavy Metal Removalmentioning

confidence: 99%

Physical, Chemical and Phytoremediation Technique for Removal of Heavy Metals

Sharma¹,

Rana²

2016

J Heavy Met Toxicity Dis

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Mankind has been using plants and natural products since time immemorial for fighting the menace of heavy metal toxicity both in humans as well as in environment surrounding them. Nearly thirty five metals have been reported to cause occupational or accidental exposure to humans. Amongst these, twenty three are heavy metals. The increasing use of such heavy metals including radionuclides constitutes deleterious health issues. Presence of heavy metals in environment and their subsequent effects on humans down the food chain creates potential health hazard. Therefore removal of heavy metal has been a subject of paramount importance. Results of an exhaustive literature survey of natural and plant based compounds against heavy metal pollution including patents, books and scientific data from globally accepted scientific databases and search engines (Pubmed, Scopus and Web of Science, Sci Finder and Google Scholar), is systematically reviewed. It is conceived that a number of phytochemical agents as well microorganism can act as heavy metal removing agent both from human beings and the environment surrounding. Microbes which are used for the removal of heavy metals from the water bodies include bacteria, fungi, algae and yeast. Some important antioxidants such as flavonoids, pectin and phytic acid are also used for the elimination of the heavy metals from the human body. The present article is an extensive review that will offer a number of strategies and possible mechanisms for the heavy metals removal both from environment as well as from human body.

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“…Thus, this heavy metal should be removed from the water and soil basin to the level of the effluent regulations of the EPA (EPA 833-B87-202, December 1987). Dissolved lead is well attracted onto alumosilicates and clays, better than other heavy metals [9][10][11]. The enhanced mobility of Pb 2+ -ion through the crystalline structure is due to its smaller hydrated ion radius compared to Al 3+ -, Fe 3+ -, Cr 3+ -, Ni 2+ -, Cu 2+ -, Zn 2+ -, Co 2+ -, Fe 2+ -, Cd 2+ -and Sr 2+ -ions [3].…”

Section: Introductionmentioning

confidence: 99%