Reactive transport of arsenic(III) and arsenic(V) on natural hematite: Experimental and modeling

Giménez, Javier; Pablo, Joan de; Martínez, María Martínez; Rovira, Miquel; Valderrama, César

doi:10.1016/j.jcis.2010.04.046

Cited by 32 publications

(8 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Dissolved arsenic is typically high for intermediate redox potential that results in dissolution of iron (hydr)oxides, usually low in oxic surface or ground water when iron (hydr)oxides are present [2][3][4][5], and also usually low when iron sulfide minerals are present [6,7].…”

Section: Introductionmentioning

confidence: 99%

As(V) and As(III) reactions on pristine pyrite and on surface-oxidized pyrite

Sun

Dempsey

Osseo‐Asare

2012

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

As(V) and As(III) reactions on pristine pyrite and on surface-oxidized pyrite

Sun

Dempsey

Osseo‐Asare

2012

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

“…[32] • Magnesium compounds (slag 1) adsorb ammonia, phosphates [33] and boron. [27] • Iron compounds (slag 3) are capable of removing organic compounds, various types of dyes, [16] benzoate and salicylate, [34] and inorganic compounds such as arsenic, [35] cadmium, [36] chromium [37] and phosphate. [38] • Silanol or aluminol compounds (slag 4) in contact with water, after a hydroxylation process, can remove metal ions such as Zn 2+ , Cd 2+ , Cu 2+ and Ni 2+ , through the following reactions (Equations 1 to 3): [21] 2S rf OH + Me…”

Section: Resultsmentioning

confidence: 99%

Multi-analytical assessment of iron and steel slag characteristics to estimate the removal of metalloids from contaminated water

Mercado-Borrayo

Schouwenaars

González-Chávez

et al. 2013

Journal of Environmental Science and Health, Part A

View full text Add to dashboard Cite

A multi-analytical approach was used to develop a mathematical regression model to calculate the residual concentration of borate ions in water present at high initial content, as a function of the main physicochemical, mineralogical and electrokinetic characteristics after adsorption on five different types of iron and steel slag. The analytical techniques applied and slag properties obtained in this work were: X-ray Fluorescence for the identification of the main chemical compounds, X-ray Diffraction to determine crystalline phases, physical adsorption of nitrogen for the quantification of textural properties and zeta-potential for electrokinetic measurements of slag particles. Adsorption tests were carried out using the bottle-point technique and a highly concentrated borate solution (700 mg B/L) at pH 10, with a slag dose of 10 g/L. An excellent correlation between the residual concentration of boron and three independent variables (content of magnesium oxide, zeta potential and specific surface area) was established for the five types of slag tested in this work. This shows that the methodology based on a multi-analytical approach is a very strong and useful tool to estimate the performance of iron and steel slag as adsorbent of metalloids.

show abstract

“…The amount of metal ions adsorbed on the as-prepared adsorbent at adsorption equilibrium, Q e (mg g À1 ), was calculated according to eqn (1):…”

Section: Adsorption Experimentsmentioning

confidence: 99%

Fabrication of FeOOH hollow microboxes for purification of heavy metal-contaminated water

Wang

Lan

Liu

et al. 2016

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

FeOOH, a frequently used adsorbent, has been widely applied in purifying aqueous heavy metals, and its performance can be greatly improved by enlarging the number of surface active sites. To this end, we fabricated FeOOH hollow microboxes constructed from numerous 2D nanosheets via a templateengaged reaction between Prussian blue (PB) and NaOH solution. With combined observations from X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS), we confirmed that the hollow microboxes corroded from PB were composed of ample frizzy FeOOH nanosheets, which ensured extensive exposure of the surface active sites. Moreover, the FeOOH microboxes were utilized as an adsorbent in the removal of heavy metals (As(III), As(V) and Se(IV)) from water and the maximum adsorption capacities were reached up to 192.19 mg g À1 , 250.0 mg g À1 and 169.9 mg g À1 at pH = 7.0, 4.0 and 5.0, respectively. The superior adsorptive performance of the FeOOH microboxes was derived from their large content of reactive exposed hydroxyl groups, which was unambiguously confirmed by X-ray adsorption fine structure spectroscopy (XAFS), as well as by surface site density analysis.

show abstract

Reactive transport of arsenic(III) and arsenic(V) on natural hematite: Experimental and modeling

Cited by 32 publications

References 40 publications

As(V) and As(III) reactions on pristine pyrite and on surface-oxidized pyrite

As(V) and As(III) reactions on pristine pyrite and on surface-oxidized pyrite

Multi-analytical assessment of iron and steel slag characteristics to estimate the removal of metalloids from contaminated water

Fabrication of FeOOH hollow microboxes for purification of heavy metal-contaminated water

Contact Info

Product

Resources

About