Kinetics and mechanism of arsenate removal by nanosized iron oxide-coated perlite

Mostafa, M. G.; Chen, Yen-Hua; Jean, Jiin-Shuh; Liu, Chia Chuan; Lee, Yao-Chang

doi:10.1016/j.jhazmat.2010.12.117

Cited by 60 publications

(36 citation statements)

References 38 publications

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“…Therefore, dihydric phosphate strongly competes with arsenic ion for adsorptive sites on the surface of FM-1 and FM-2, and thus decreases the adsorptive capacity. Similar observations were also reported in previous studies (Mostafa et al, 2011;Cheng et al, 2005). Despite the effect of these common anions at higher concentrations, maybe these anions would not affect the adsorption of arsenic as their concentrations (especially phosphate) in groundwater are usually much lower than those (1.0 and 10 mmol/L) used in this experimental study.…”

Section: Effect Of Co-existing Anions On As(iii) Adsorptionsupporting

confidence: 90%

Adsorption kinetic properties of As(III) on synthetic nano Fe-Mn binary oxides

Wang

Kong

et al. 2016

J. Earth Sci.

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The adsorptive removal of arsenic by synthetically-prepared nano Fe-Mn binary oxides (FM) was investigated. A novel method using potassium permanganate and ferric chloride as raw materials was used to synthesise FM. The molar ratio of Fe and Mn in the synthetic Fe-Mn binary oxides was 4 : 3. The FM-1 and FM-2 (prepared at different activation temperatures) having high specific surface areas (358.87 and 128.58 m 2 /g, respectively) were amorphous and of nano particle types. The amount of arsenic adsorbed on FM-1 was higher than that adsorbed on FM-2 particles. After adsorption by FM-1, residual arsenic concentration decreased to less than 10 μg/L. The adsorption kinetics data were analyzed using different kinetic models including pseudo first-order model, pseudo second-order model, Elovich model and intraparticle diffusion model. Pseudo second-order kinetic model was the most appropriate model to describe the adsorption kinetics. The adsorption percentage of As(III) increased in the pH range of 2-3 while it decreased with the increase of pH ( 3

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Section: Effect Of Co-existing Anions On As(iii) Adsorptionsupporting

confidence: 90%

Adsorption kinetic properties of As(III) on synthetic nano Fe-Mn binary oxides

Wang

Kong

et al. 2016

J. Earth Sci.

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“…Reductions in terms of either vegetative growth or oil contents in sunflower due to drought conditions were found to be alleviated by the foliar applications of Fe (Ebrahimian and Bybordi, 2011). Mostafa et al (2011) examined the effect of Fe application with surface water stress conditions on growth, yield, and nutrient uptake of Sesamum indicum L. plants (Table 1). Iron spraying plays a significant role in improving the protein quality and resistance under drought stress (Parhamfar, 2006;Afshar et al, 2012).…”

Section: Iron and Drought Stressmentioning

confidence: 99%

“…Plants, undoubtedly, are being affected by heavy metal contaminations as numerous morphological, physiological, and Iron with zinc Spray Calendula officinalis Improves the leaf characters (weight, area and numbers) resulting into enhancement in the effects triggered by drought stress Pirzad and Shokrani, 2012 Iron application with sulfur Sesame Improves growth, nutrient, yield, and their components Mostafa et al, 2011 Nano-iron application Cowpea Improvement of protein quality being advantageous in increasing resistance to drought stress Parhamfar, 2006;Afshar et al, 2012 Fe spraying Creeping Bentgrass…”

Section: Iron and Heavy Metal Stressmentioning

confidence: 99%

Acquisition and Homeostasis of Iron in Higher Plants and Their Probable Role in Abiotic Stress Tolerance

Tripathi

Singh

Gaur

et al. 2018

Front. Environ. Sci.

144

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Iron (Fe) is a micronutrient that plays an important role in agriculture worldwide because plants require a small amount of iron for its growth and development. All major functions in a plant's life from chlorophyll biosynthesis to energy transfer are performed by Fe (Brumbarova et al., 2008;Gill and Tuteja, 2011). Iron also acts as a major constituent of many plant proteins and enzymes. The acquisition of Fe in plants occurs through two strategies, i.e., strategy I and strategy II (Marschner and Römheld, 1994). Under various stress conditions, Nramp and the YSL gene families help in translocation of Fe, which further acts as a mineral regulatory element and defends plants against stresses. Iron plays an irreplaceable role in alleviating stress imposed by salinity, drought, and heavy metal stress. This is because it activates plant enzymatic antioxidants like catalase (CAT), peroxidase, and an isoform of superoxide dismutase (SOD) that act as a scavenger of reactive oxygen species (ROS) (Hellin et al., 1995). In addition to this, their deficiency as well as their excess amount can disturb the homeostasis of a plant's cell and result in declining of photosynthetic rate, respiration, and increased accumulation of Na + and Ca − ions which culminate in an excessive formation of ROS. The short-range order hydrated Fe oxides and organic functional groups show affinities for metal ions. Iron plaque biofilm matrices could sequester a large amount of metals at the soil-root interface. Hence, it has attracted the attention of plant physiologists and agricultural scientists who are discovering more exciting and hidden applications of Fe and its potential in the development of bio-factories. This review looks into the recent progress made in putting forward the role of Fe in plant growth, development, and acclimation under major abiotic stresses, i.e., salinity, drought, and heavy metals.

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“…A number of experiments and model studies of the adsorption of arsenic and other heavy metals are described in various publications [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. These studies describe sorption processes at different pH values, initial heavy metal ion concentrations in water, solid/liquid ratio, particle size of a sorption material, filtration rate, temperature and composition of water to be treated (concentration of iron, manganese, phosphorus, silicon, fluorides, sulphates, organic matter, etc.…”

Section: Introductionmentioning

confidence: 99%

The Use of Iron-Based Sorption Materials and Magnetic Fields for the Removal of Antimony from Water

Ilavský¹,

Barloková²,

Munka³

2015

Pol. J. Environ. Stud.

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Elemental antimony (Sb) is a silvery white, brittle solid that, along with arsenic and bismuth, belongs to group VA of the periodic table. It is classified as both a metal and a metalloid.Antimony is present in the Earth's crust at a concentration of about 0.2-0.5 mg/kg. It is seldom found in the environment as a pure element, but it is often found as trivalent and pentavalent sulphides and chlorides. Antimony may enter the aquatic environment by way of natural weathering of rocks, runoff from soils, effluents from mining and manufacturing operations, and industrial and municipal leachate discharges.Antimony is present in water as Sb Antimony is a toxic heavy metal with effects similar to those of arsenic and lead. Intoxication by antimony is not as severe as that from arsenic, since the antimony compounds are absorbed more slowly. The findings on the health aspects of certain heavy metals in drinking water are included in several publications [3][4][5]. The World Health Organization and institutions dealing with monitoring carcinogens have not yet classified antimony as a carcinogen.Pol. J. Environ. Stud. Vol. 24, No. 5 (2015), 1983-1992 Original Research AbstractThe objective of this work was to verify the sorption properties of granular filter materials (GEH, CFH12, Bayoxide E33) during the process of removing antimony from water, and to monitor the impact of magnetic and electromagnetic fields on the effectiveness of removing antimony from water. Pilot tests showed that the use of iron-based sorption materials could possibly decrease the antimony content in water to the values limited for drinking water (5 µg/L Sb). The most suitable adsorbent for removing antimony was GEH. At a concentration of antimony in raw water of 81.4 µg/L and a filtration rate of 3.4 m/h, a value of bed volume 2,030 and adsorption capacity of 144.7 µg/g was determined; at the filtration rate of 5.6 m/h, the bed volume was 1,342, and the adsorption capacity was 96.8 µg/g achieved at breakthrough concentration 5 μg Sb/L. The results presented from testing the effects of a permanent magnet and electromagnet in removing antimony are not well known, as only a few experiments have been conducted.

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Kinetics and mechanism of arsenate removal by nanosized iron oxide-coated perlite

Cited by 60 publications

References 38 publications

Adsorption kinetic properties of As(III) on synthetic nano Fe-Mn binary oxides

Adsorption kinetic properties of As(III) on synthetic nano Fe-Mn binary oxides

Acquisition and Homeostasis of Iron in Higher Plants and Their Probable Role in Abiotic Stress Tolerance

The Use of Iron-Based Sorption Materials and Magnetic Fields for the Removal of Antimony from Water

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