Effect of Equilibrium Solution Ionic Strength on the Adsorption of Zn, Cu, Cd, Pb, As, and P on Aluminum Mining By-Product

Costa, Enio Tarso de Souza; Guilherme, Luiz Roberto Guimarães; Lopes, Gertrudes Teixeira; Marques, João José; Curi, Nilton

doi:10.1007/s11270-014-1894-0

Cited by 14 publications

(2 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2). This info shows a higher ratio of poor energy bonds (electrostatic) and as a result higher mobility of Cd and Pb in soil (Costa et al 2014), and as also found Hamzenejad Taghlidabad and Sepehr (2017).…”

Section: Mf Values Of Metals In Soilsupporting

confidence: 82%

Contaminated soil amendment by diatomite: chemical fractions of zinc, lead, copper and cadmium

Piri

Sepehr

Samadi

et al. 2020

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

High concentration of labile metals in soil directly affects soil quality, water health and human safety. Decreasing mobility of metals, especially in contaminated soils, by cost-effective amendments may alleviate environmental problems. Natural diatomite was investigated to immobilize toxic elements of zinc, lead, copper and cadmium in a contaminated calcareous soil. The diatomite was characterized using X-ray fluorescence spectrometry and scanning electron microscopy. Contaminated soil was incubated with 0, 2 and 5 weight-% of diatomite at 25 °C for 8 weeks. Tessier sequential extraction method was also used as a suitable method for identification of chemical forms of heavy metals; metal stability index and mobility factor were calculated. Results showed that application of diatomite in soil significantly decreased the metals in the exchangeable fraction and increased them in the residual fraction. The exchangeable metal fractions decreased by 66-88%, and residual fractions increased by 18-94% in the 5 weight-% of diatomite treatment after 8-week incubation. With an increase in the amount of diatomite applied and the incubation time, metal mobility factor values significantly decreased and soil pH values increased. Application of diatomite caused the heavy metals redistribution toward more stable forms and leads to an increase in stability index values. In conclusion, in situ immobilization of heavy metals by application of diatomite, as a low-cost amendment, had a significant potential to stabilize metals in the contaminated calcareous soil.

show abstract

Section: Mf Values Of Metals In Soilsupporting

confidence: 82%

Contaminated soil amendment by diatomite: chemical fractions of zinc, lead, copper and cadmium

Piri

Sepehr

Samadi

et al. 2020

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…1). According to Costa et al (2014), studies evaluating the adsorption of elements in different IS are important to predicting their sorptive behaviors, allowing to identify macroscopically the specific (innersphere complex) or non-specific binding (outer-sphere complex). In this context, inner-sphere complex may be suggested if the adsorption value is unaffected by changes in IS (McBride 1997;Xu 2013), as occurred for the Se(IV) adsorption data in the present study.…”

Section: Se(iv) Adsorption Data and Pcamentioning

confidence: 99%

Adsorption of Selenite in Tropical Soils as Affected by Soil Management, Ionic Strength, and Soil Properties

Araujo

Lessa

Lima

et al. 2019

J Soil Sci Plant Nutr

Self Cite

View full text Add to dashboard Cite

Considering that there are only few studies involving selenite sorption in tropical soils, mainly in Brazil, this study aimed to evaluate the influence of soil management, ionic strength (IS), and soil properties on selenite (SeIV) adsorption in tropical soils from the Brazilian Cerrado. A total of 16 soil samples were collected, being eight from cultivated fields and eight from the respective native area (uncultivated soils). Adsorption tests of Se(IV) were carried out in all soil samples, where solutions containing Se(IV) at concentrations of 100, 500, and 5000 μg L −1 were added in two IS, 15 and 150 mM. Results showed that all soils present high adsorption of Se(IV), mainly the clayey soils. For the sandy soils, higher Se(IV) adsorbed amounts were found for the uncultivated soils. Selenite retention was not affected by the tested IS, which indicate that the main adsorption mechanism of Se(IV) in these oxidic soils is by inner-sphere complex, which explains the low Se(IV) desorbed amounts found in the present study. Data from principal component analysis (PCA) showed that clay, S, Fe 2 O 3 , and Al 2 O 3 positively correlated with the adsorption of Se(IV), while (P-rem) available P, Fe OX , Al OX , PZSE, and pH have shown to affect negatively the Se(IV) adsorption. It can be concluded that Se(IV) is strongly adsorbed on Brazilian tropical soils, being this process unaffected by IS (which was not observed for selenate in a previous study) and affected by soil management and soil properties.

show abstract

Hydrothermal synthesis of a magnetic adsorbent from wasted iron mud for effective removal of heavy metals from smelting wastewater

Zhu

Dong

et al. 2018

Environ Sci Pollut Res

View full text Add to dashboard Cite

A magnetic adsorbent (MA) was synthesized from wasted iron mud of a groundwater treatment plant using a novel one-step hydrothermal method. The results showed that Fe content of MA was 41.8 wt%, 2.5 times higher than that of iron mud, which was caused by hydrothermal dissolution of non-ferrous impurities under alkaline condition, such as quartz and albite, regardless of addition of ascorbic acid or not. Ferrihydrite was 92.7% in dry iron mud before adding ascorbic acid and gradually decreased to 58.1% by increasing the molar ratio of ascorbic acid to Fe following hydrothermal treatment. The strongest saturation magnetization of 16.29 emu/g was observed in the prepared MA-4 when the ascorbic acid to Fe molar ratio was 1. The highest surface site concentration of 1.31 mmol/g was observed in MA-2 when the ratio was 0.02. The mechanism of hydrothermal conversion of wasted iron mud to MA was reductive dissolution of ferrihydrite to form siderite, which was then reoxidized to maghemite. When 12.5 g/L of MA-2 was applied to treat smelting wastewater, over 99% removal of Cu, Zn, Pb, and Cd was achieved. The major mechanisms of Cu and Zn adsorption by the adsorbent were cationic exchange.

show abstract

Effect of Equilibrium Solution Ionic Strength on the Adsorption of Zn, Cu, Cd, Pb, As, and P on Aluminum Mining By-Product

Cited by 14 publications

References 23 publications

Contaminated soil amendment by diatomite: chemical fractions of zinc, lead, copper and cadmium

Contaminated soil amendment by diatomite: chemical fractions of zinc, lead, copper and cadmium

Adsorption of Selenite in Tropical Soils as Affected by Soil Management, Ionic Strength, and Soil Properties

Hydrothermal synthesis of a magnetic adsorbent from wasted iron mud for effective removal of heavy metals from smelting wastewater

Contact Info

Product

Resources

About