FeOOH-modified clay sorbents for arsenic removal from aqueous solutions

Ozola, Ruta; Krauklis, Andrey E.; Leitietis, Martins; Burlakovs, Juris; Vircava, Ilze; Ansone-Bertina, Linda; Bhatnagar, Amit; Kļaviņš, Māris

doi:10.1016/j.eti.2016.06.003

Cited by 41 publications

(12 citation statements)

References 34 publications

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“…In the case of Mn‐modification of natural zeolite, Mn content increased from 0.01 ± 0.01 to 4.58 ± 0.17 mass%. Considering that metalloids have high affinity to interact with iron compounds, one can predict that sorbents with the highest content of iron oxide will also have the highest sorption capacity …”

Section: Resultsmentioning

confidence: 99%

“…As(V) adsorption capacity of a novel material Fe‐5A is relatively high (14.89 ± 1.03 mg g −1 ) in comparison with other adsorbents described in the literature, including a critical review of adsorbents for arsenic removal . Some of the materials mentioned are pure alumina (13.64 mg g −1 ), activated alumina (9.20–24 mg g −1 ), activated carbon (3.08–30.48 mg g −1 ), bauxsol (1.081 mg g −1 ), activated bauxsol (7.642 mg g −1 ), gibbsite (4.60 mg g −1 ), goethite (12.5 mg g −1 ), kaolinite (<0.23 mg g −1 ), kaolinites intercalated with triethanolamine methylammonium iodide (6.4–10.12 mg g −1 ), granular ferric hydroxide (2.3–8.5 mg g −1 ), Fe‐sericite beads (5.87 mg g −1 ), drinking water treatment solids (DWTS; 0.017–0.21 mg g −1 ), layered double hydroxides (LDH; 24–195 mg g −1 ), manganese oxide‐modified biochar (1 mg g −1 ), magnetite‐modified biochar (7.52 mg g −1 ) and FeOOH‐modified montmorillonite clay (14.24 ± 0.80 mg g −1 ) …”

Section: Introductionmentioning

confidence: 99%

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FeOOH and Mn₈O₁₀Cl₃ modified zeolites for As(V) removal in aqueous medium

Krauklis

Ozola

Burlakovs

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND Arsenic in drinking water poses serious potential health risks in more than 30 countries with total affected population of around 100 million people. The present study is devoted to the development of innovative sorbents based on zeolite materials for As(V) sorption by modifying raw materials with iron oxyhydroxide and manganese oxychloride. Natural clinoptilolite and synthetic zeolite A were modified in order to obtain improved sorption of As(V). Sorption properties of newly developed sorbents were studied. Zeolites containing natural clinoptilolite are chosen due to relatively low cost and their broad use in industrial production as well as characteristic large surface area. RESULTS Results obtained indicate that modification of zeolites with FeOOH and Mn8O10Cl3 significantly improves the As(V) sorption capacity of newly developed materials. As(V) sorption on FeOOH‐modified aluminosilicates follows the Langmuir model, while on unmodified aluminosilicates it is described by the Freundlich model. As(V) sorption kinetics on both modified and unmodified materials most precisely can be described by Lagergren's pseudo‐second‐order kinetic model. Elevated As(V) concentration on the surface of Mn8O10Cl3 crystals and amorphous FeOOH indicates these compounds as responsible for sorption increase. CONCLUSION Developed sorbents show improved performance in comparison with their unmodified counterparts, with a dramatic increase in As(V) sorption capacity up to 99.3 times in the case of FeOOH‐modified calcium zeolite A. These materials have great potential for As(V) removal in aqueous medium. © 2017 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

FeOOH and Mn₈O₁₀Cl₃ modified zeolites for As(V) removal in aqueous medium

Krauklis

Ozola

Burlakovs

et al. 2017

J of Chemical Tech & Biotech

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“…Additionally, FeOOH-modified zeolites A were obtained and described in the following source [17]. It should be also noted that another aluminosilicate, clay montmorillonite was modified using a similar approach and described in another work [39].…”

Section: Zeolite Modification Methodsmentioning

confidence: 99%

Use of Synthetic and Natural Zeolites Tailored for As(V) Sorption

Krauklis¹

2018

Zeolites and Their Applications

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Arsenic in drinking water poses serious potential health risks in more than 30 countries with total affected population of around 100 million people. Natural and synthetic zeolites can be tailored in order to obtain improved sorption of As(V) making them a relatively cheap and efficient material for water remediation. The chapter is concentrated on the zeolitic materials for water remediation, and reports new findings regarding modification methods and comparison of such materials for the use in As(V) sorption applications. Methods of modification of zeolites are developed and explained. On the experimental and novel scale, using developed methods, 11 novel materials are synthesized and studied. Initial and modified materials are characterized by optical microscopy, SEM and EDX, as well as by metal content in those which are determined using dissolution in acids and FAAS.

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“…A pH function of the activation energy of dissolution E I I A = f (pH) is shown in Figure 5. It is fine to approximate the kinetic pH dependency as a polynomial function, being a parabolic function in this case [43][44][45][46]. Both the glass and the Si dissolution rate constant trends are similar, with an exception at low pH levels, i.e., at a pH of 1, the rates of Si dissolution increase more dramatically than the total glass dissolution rates, indicating a higher contribution of Si to the material loss during the dissolution in strongly acidic environments.…”

Section: Effect Of Ph On the Glass Dissolution Kineticsmentioning

confidence: 99%

Dissolution Kinetics of R-Glass Fibres: Influence of Water Acidity, Temperature, and Stress Corrosion

Krauklis

Gagani

Veģere

et al. 2019

Fibers

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Glass fibres slowly degrade due to dissolution when exposed to water. Such environmental aging results in the deterioration of the mechanical properties. In structural offshore and marine applications, as well as in the wind energy sector, R-glass fibre composites are continuously exposed to water and humid environments for decades, with a typical design lifetime being around 25 years or more. During this lifetime, these materials are affected by various temperatures, acidity levels, and mechanical loads. A Dissolving Cylinder Zero-Order Kinetic (DCZOK) model was able to explain the long-term dissolution of R-glass fibres, considering the influence of the pH, temperature, and stress corrosion. The effects of these environmental conditions on the dissolution rate constants and activation energies of dissolution were obtained. Experimentally, dissolution was measured using High Resolution Inductively Coupled Plasma Mass Spectrometry (HR-ICP-MS). For stress corrosion, a custom rig was designed and used. The temperature showed an Arrhenius-type influence on the kinetics, increasing the rate of dissolution exponentially with increasing temperature. In comparison with neutral conditions, basic and acidic aqueous environments showed an increase in the dissolution rates, affecting the lifetime of glass fibres negatively. External loads also increased glass dissolution rates due to stress corrosion. The model was able to capture all of these effects.

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FeOOH-modified clay sorbents for arsenic removal from aqueous solutions

Cited by 41 publications

References 34 publications

FeOOH and Mn₈O₁₀Cl₃ modified zeolites for As(V) removal in aqueous medium

FeOOH and Mn₈O₁₀Cl₃ modified zeolites for As(V) removal in aqueous medium

Use of Synthetic and Natural Zeolites Tailored for As(V) Sorption

Dissolution Kinetics of R-Glass Fibres: Influence of Water Acidity, Temperature, and Stress Corrosion

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FeOOH-modified clay sorbents for arsenic removal from aqueous solutions

Cited by 41 publications

References 34 publications

FeOOH and Mn8O10Cl3 modified zeolites for As(V) removal in aqueous medium

FeOOH and Mn8O10Cl3 modified zeolites for As(V) removal in aqueous medium

Use of Synthetic and Natural Zeolites Tailored for As(V) Sorption

Dissolution Kinetics of R-Glass Fibres: Influence of Water Acidity, Temperature, and Stress Corrosion

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Product

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FeOOH and Mn₈O₁₀Cl₃ modified zeolites for As(V) removal in aqueous medium

FeOOH and Mn₈O₁₀Cl₃ modified zeolites for As(V) removal in aqueous medium