Adsorptive Removal Of Chromium By Modified Laterite

Rani, K. Sudha; Sarma, G. V. S.; Naidu, K. Gouru; Ramesh, K.

doi:10.1016/j.matpr.2019.07.479

Cited by 5 publications

(4 citation statements)

References 25 publications

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“…Nearly the same findings were reported for Cr(III) and Cr(VI) removal from aquatic medium using different sorbents. 15,18,28,29…”

Section: Ph Effect On Bio-removal Yieldmentioning

confidence: 99%

“…The use of inexpensive, easy, high efficiency and environmentally friendly adsorbents is very important for the removal of heavy metals. Various adsorbents such as pomelo peel, 10 rice husk, 11 corn cobs, 12 red algae, 13 moss, 14 modified laterite, 15 polyacrylamides, 16 nanoparticles, 17 eggshells, 18 diatomite, 19 prawn shell activated carbon, 20 and algae biosorbents 21 have been used for the removal of chromium ions from water samples. The biomass material has some advantages such as low cost, easy operation, disposal after regeneration and having some functional groups.…”

Section: Introductionmentioning

confidence: 99%

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Removal of Cr Ions from Aquatic Solutions Using Olive Leaves as Low-cost Bio-sorbent

Sahin¹,

Aslan²,

Tüzen³

et al. 2020

At.Spectrosc.

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Contamination of water by chromium (Cr) creates serious pollution in terms of the environment and public health, since its different forms become released into air, water, soil and residential areas. In the present work, olive leaf powder (OLP) was evaluated as a novel low-cost sorbent due to its various functional groups such as amide, hydroxyl, carboxyl, and carbonyl which are responsible for the bio-removal of chromium ions from aqueous solutions. The chemical functional groups and microstructure of the OLP bio-sorbent were characterized by the Fourier Transform Infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM) techniques. The bio-sorption conditions were optimized as pH 4, contact time 60 min, bio-sorbent dosage 40 g/L, temperature 40 °C. The bio-sorption isotherm was well fitted to the Langmuir model, and the predicted maximum bioremoval capacity of the OLP was estimated at 42.4 mg/g under the above-mentioned experimental conditions. The reuse performance of the bio-sorbent was determined after repeated sorption/desorption cycles. The thermodynamic examination showed that the chromium sorption by OLP was endothermic in thermal nature. The kinetic evaluations indicated that the bio-sorption process well followed with the pseudo-second-order model. The overall results demonstrated that the OLP can be thought as a potential bio-sorbent for cleaning of chromium-contaminated water and wastewater due to its advantageous properties such as low cost, availability, renewable nature, and remarkable bio-sorption capacity.

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“…Nearly the same findings were reported for Cr(III) and Cr(VI) removal from aquatic medium using different sorbents. 15,18,28,29…”

Section: Ph Effect On Bio-removal Yieldmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Removal of Cr Ions from Aquatic Solutions Using Olive Leaves as Low-cost Bio-sorbent

Sahin¹,

Aslan²,

Tüzen³

et al. 2020

At.Spectrosc.

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show abstract

“…Heavy copper ions (Cu (II)) cannot be degraded in the natural environment, thus potentially damaging the ecological environment, animals and plants, and other living threats [1,2] . More seriously, the copper in the human body exceeding 30 mg kg −1 could lead to stomach cramps, convulsions, diarrhea, jaundice, and many other adverse consequences, including liver cirrhosis (Wilson's disease) [3] . Therefore, the removal of hazardous Cu (II) in wastewater is a very crucial issue.…”

Section: Introductionmentioning

confidence: 99%

“…[1,2] More seriously, the copper in the human body exceeding 30 mg kg À 1 could lead to stomach cramps, convulsions, diarrhea, jaundice, and many other adverse consequences, including liver cirrhosis (Wilson's disease). [3] Therefore, the removal of hazardous Cu (II) in wastewater is a very crucial issue.…”

Section: Introductionmentioning

confidence: 99%

Cross‐Linked Amidoximated Poly(acrylonitrile‐acrylic acid) Microspheres with Exceptional Adsorption Capacity, Reusability towards Copper(II): Batch and Column Studies

et al. 2022

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s: Acrylonitrile‐based adsorbents are effective candidates for metal ions removal from wastewater. However, their performance is often limited by their unsatisfied stability, reusability, and sorption efficiency. In this contribution, the amino group of urea was cross‐linked with the carboxyl group of the firstly formed AN (acrylonitrile) and AA (acrylic acid) copolymer to improve the strength, while the cyanide group of AN was dedicatedly reacted with hydroxylamine hydrochloride to obtain an amidoxime group endowing the strong adsorption capacity for Cu (II). The optimum adsorption conditions of the as‐prepared adsorbent for Cu (II) were at 25 °C and pH 7, which only consumed 60 min to reach the adsorption equilibrium. The theoretical maximum adsorption capacity was 176.717 mg g−1. The amidoxime group on the surface of the adsorbent was inherently entitled to the outstanding adsorption capacity. Langmuir and pseudo‐second‐order model fitted the adsorption process. Furthermore, there still retained 84.4 % of the original adsorption capacity after seven cycles. Under column adsorption, the adsorbed particles were surprisingly lumped together, which can be easily taken out entirely after adsorption for recycling collection. Overall, the obtained acrylonitrile‐based adsorbents, easily regenerated with high performance and excellent sorption efficiency, should be a promising sorbent.

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Preparation and anti‐leakage properties of sesbania gum‐grafted copolymers

Liu

Cheng

Zhao

et al. 2020

J of Applied Polymer Sci

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A sesbania gum-g-poly (acrylic acid-co-vinyl acetate) (SG-g-P (AA-co-VAc)) emulsion was prepared by free radical polymerization using environmentalfriendly sesbania gum (SG) as raw material and grafted with acrylic acid and vinyl acetate. It was applied to study the performance of preventing water leakage from the soil. The effects of acrylic acid/vinyl acetate (AA/VAc) monomer ratio, neutralization degree of AA, content of ammonium persulfate and polymerization temperature on the properties of emulsion were investigated. Characterization of the emulsion by FTIR, SEM, TGA, and particle size distribution showed that AA and VAc were successfully grafted onto SG. SG-g-P (AA-co-VAc) had good stability under the optimum synthesis condition. Compared to SG, the thermal stability of the product was improved. The consolidation layer was formed after the product was added to the soil, which might reduce the voids between soil particles and reduce the water penetration rate. This greatly expanded its application in the research of anti-leakage performance.

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Adsorptive Removal Of Chromium By Modified Laterite

Cited by 5 publications

References 25 publications

Removal of Cr Ions from Aquatic Solutions Using Olive Leaves as Low-cost Bio-sorbent

Removal of Cr Ions from Aquatic Solutions Using Olive Leaves as Low-cost Bio-sorbent

Cross‐Linked Amidoximated Poly(acrylonitrile‐acrylic acid) Microspheres with Exceptional Adsorption Capacity, Reusability towards Copper(II): Batch and Column Studies

Preparation and anti‐leakage properties of sesbania gum‐grafted copolymers

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