Arsenite Removal from Aqueous Solution using Mixed Mineral Systems Injected with Iron Sulfide under Sulfidic-Anoxic condition II. The role of solution composition and ageing

Egirani, Davidson; Andrews, Joseph; Baker, Alex R.

doi:10.9790/2402-0824164171

Cited by 3 publications

(16 citation statements)

References 120 publications

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“…In previous study [15], arsenic(III) demonstrated a near linear sorption increase with increase in initial metal concentration for single mineral system of kaolinite, montmorillonite, and mixed mineral system of kaolinite/montmorillonite . In this study, all mineral systems exhibited linear sorption increase as initial arsenic concentration increased as shown in Figure 2.…”

Section: Mineral Systems and Initial Metal Concentration Effectmentioning

confidence: 99%

“…Supernatant was filtered through a cellulose acetate filter (pore size 0.2 µm) and analyzed for arsenic (III), using a Hitachi Atomic Absorption Spectrophotometer (HG-AAS). In previous study in the absence of sulfidic-anoxic condition [15] arsenic (III) demonstrated a near linear sorption increase with increasing pH for single mineral systems of kaolinite, montmorillonite, and mixed mineral system of kaolinite/montmorillonite. In this study under sulfidic-anoxic condition and over the range of particle sizes investigated, sorption capacity increases with pH increase and in a sinusoidal pattern in some cases as shown in Figure 1.…”

Section: Sorption Experimentsmentioning

confidence: 99%

“…In previous study in the absence of sulfidic-anoxic condition [15], the behavior of arsenic(III) sorption as particle concentration (Cp) increased was complex being linear for goethite and mixed mineral systems containing goethite.…”

Section: Mineral Systems and Cp Effectmentioning

confidence: 99%

“…The empirical model as provided previously to address the mineral-arsenic interactions is given in Equation (2): [15].…”

Section: Davidson Egirani Et Al: Effect Of Mineral Systems Injected mentioning

confidence: 99%

“…Distribution coefficient used in calculating arsenic sorbed was derived from the Freundlich model Equation (1) [15].…”

Section: Theoretical Models and Isothermsmentioning

confidence: 99%

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Effect of Mineral Systems Injected with Zinc Sulfide on Arsenite Removal from Aqueous Solution: Part II

Egirani¹

2015

AJAC

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Abstract:Mineral systems of kaolinite, montmorillonite, goethite and their mixtures were investigated to determine their effect on arsenite removal. Experimental studies include characterization and batch mode experiments. This study was in relation to solution composition and ageing relevant to streams and groundwater impacted by arsenic. Sorption isotherms indicated that sorption capacities of the different clay minerals, goethite and their mixtures were dependent on particle size, pH, particle concentration, arsenic concentration and residence time. Batch mode studies at room temperature revealed increase in sorption as pH was increased. All mineral systems exhibited increase in sorption as initial arsenic concentration increased. All mineral systems exhibited both promotive and non-promotive Cp effects. The complex behavior of mineral systems over the range of residence time investigated may be attributed to increased hydroxylation of the mineral surface and availability of thiol (≡S-H) and hydroxyl (≡Me-OH) functional groups and reactive sites.

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Section: Mineral Systems and Initial Metal Concentration Effectmentioning

confidence: 99%

Section: Sorption Experimentsmentioning

confidence: 99%

Section: Mineral Systems and Cp Effectmentioning

confidence: 99%

“…The empirical model as provided previously to address the mineral-arsenic interactions is given in Equation (2): [15].…”

Section: Davidson Egirani Et Al: Effect Of Mineral Systems Injected mentioning

confidence: 99%

“…Distribution coefficient used in calculating arsenic sorbed was derived from the Freundlich model Equation (1) [15].…”

Section: Theoretical Models and Isothermsmentioning

confidence: 99%

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Effect of Mineral Systems Injected with Zinc Sulfide on Arsenite Removal from Aqueous Solution: Part II

Egirani¹

2015

AJAC

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Genesis, Uses and Environment Implications of Iron Oxides and Ores

Egirani¹,

Latif²,

Poyi³

et al. 2018

Iron Ores and Iron Oxide Materials

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Iron oxides are chemical complexes which occur naturally, comprising iron and oxygen. Here, together, 16 types of iron oxides and oxyhydroxides have been identified. These two components of oxides are widely spread naturally. They are vital to humans and useful in most geological and biological activities. In addition, they are useful as pigments and catalyst in industries and hemoglobin in blood circulation. The interplay and conversion of these components from one form to another are essentially controlled by bacterial species. These contain 70 and 72% iron, respectively. Furthermore, iron ores are classified in terms of occurrence. Banded iron formation (BIF) comprises 15% iron, comprising minerals of iron that are bedded besides silica. Beneficiation processes of iron ore generate dust in the atmosphere, acid mine drainage in the ecosystem and metallic iron for steelmaking. Beneficiation process requires dissolution of minerals surrounding the ore and the release of metals and cement matrix into water courses. These generates acid leading to acid mine drainage. Therefore, there is a need for impact assessment of the environment in the planned beneficiation cycle. Sustainable beneficiation must be done to reduce impact on the natural, social or economic environment.

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Arsenite Removal from Aqueous Solution using Mixed Mineral Systems Injected with Iron Sulfide under Sulfidic- Anoxic conditions 1: Reactivity and Removal Kinetics

Egirani¹,

Andrews²,

Baker³

2014

IOSRJESTFT

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Arsenite Removal from Aqueous Solution using Mixed Mineral Systems Injected with Iron Sulfide under Sulfidic-Anoxic condition II. The role of solution composition and ageing

Cited by 3 publications

References 120 publications

Effect of Mineral Systems Injected with Zinc Sulfide on Arsenite Removal from Aqueous Solution: Part II

Effect of Mineral Systems Injected with Zinc Sulfide on Arsenite Removal from Aqueous Solution: Part II

Genesis, Uses and Environment Implications of Iron Oxides and Ores

Arsenite Removal from Aqueous Solution using Mixed Mineral Systems Injected with Iron Sulfide under Sulfidic- Anoxic conditions 1: Reactivity and Removal Kinetics

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