Adsorption of arsenic by activated carbon, calcium alginate and their composite beads

Hassan, Asaad F.; Abdel-Mohsen, A.M.; Elhadidy, H.

doi:10.1016/j.ijbiomac.2014.04.006

Cited by 135 publications

(55 citation statements)

References 29 publications

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“…The effect of arsenic initial concentration, contact time, temperature and pH were studied and optimized finally. The maximum sorption capacity was found to be 66.7 mg/g of the composite at 30 C (Hassan et al, 2014).…”

Section: Calcium Alginate/activated Carbon Compositementioning

confidence: 96%

Application of biopolymer composites in arsenic removal from aqueous medium: A review

Rahim

Haris

2015

Journal of Radiation Research and Applied Sciences

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Polymeric sorbents and biocomposites a b s t r a c t Various sorbents have been used to remove arsenic from contaminated water which is one of the most toxic elements for mankind. In this review, concentration has been focused on the removal of arsenic from aqueous medium using natural, non-toxic, biodegradable and eco-friendly polymeric materials. Therefore, chitosan has been selected one of the most appropriate biopolymer to remove heavy metals form contaminated water particularly arsenic. Therefore, chitosan grafting, blending, doping and biocomposite formulations with polymeric and/or activated inorganic materials have gained much attention. This review provides the relevant literature on the applications of polymeric biocomposites for removal of arsenic from aqueous medium. However, the literature survey reveals that very limited attention has been focused on the applications of biocomposites for the removal of arsenic in the past. The sorption capacities of sorbents and LD 50 of the arsenic compounds have been compiled.

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Section: Calcium Alginate/activated Carbon Compositementioning

confidence: 96%

Application of biopolymer composites in arsenic removal from aqueous medium: A review

Rahim

Haris

2015

Journal of Radiation Research and Applied Sciences

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“…In arsenic ions adsorption, pore diffusion is important, since the particle size, solubility, pH, and metal ions concentration affect adsorption capacity and the adsorption capacity increases with a decrease in particle size [76,107]. Hassan et al [108] investigated arsenic removal on potassium hydroxide activated carbon-based apricot stone, calcium alginate beads, and calcium alginate/activated carbon composite beads. The adsorbents materials have surface areas of 1621 m 2 /g, 32.9 m 2 /g, and 733.6 m 2 /g and the adsorption capacity at 20 ∘ C was 26.3 mg/g, 39.4 mg/g, and 54.8 mg/g, respectively.…”

Section: Adsorption Isotherm Studies On As(iii) and As(v)mentioning

confidence: 99%

A Comparative Study on Removal of Hazardous Anions from Water by Adsorption: A Review

John

David

Mmereki

2018

International Journal of Chemical Engineering

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This paper presents a comparative review of arsenite (As(III)), arsenate (As(V)), and fluoride (F − ) for a better understanding of the conditions and factors during their adsorption with focus on (i) the isotherm adsorption models, (ii) effects of pH, (iii) effects of ionic strength, and (iv) effects of coexisting substances such as anions, cations, and natural organics matter. It provides an indepth analysis of various methods of arsenite (As(III)), arsenate (As(V)), and fluoride (F − ) removal by adsorption and the anions' characteristics during the adsorption process. The surface area of the adsorbents does not contribute to the adsorption capacity of these anions but rather a combination of other physical and chemical properties. The adsorption capacity for the anions depends on the combination of all the factors: pH, ionic strength, coexisting substances, pore volume and particles size, surface modification, pretreatment of the adsorbents, and so forth. Extreme higher adsorption capacity can be obtained by the modification of the adsorbents. In general, pH has a greater influence on adsorption capacity at large, since it affects the ionic strength, coexisting anions such as bicarbonate, sulfate, and silica, the surface charges of the adsorbents, and the ionic species which can be present in the solution.

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“…Ca 2+ ), which is widely used as encapsulating compounds and composite materials. 15,16 The resulting CA has been widely used to immobilize small particles material, such as nanoporous MCM-41, 17 graphene oxide, 18 halloysite nanotube, 18 activated carbon, 19 silica 20 and magnetic nanoparticles, 21 in order to adsorb heavy metals and dyes from aqueous solutions.…”

Section: -13mentioning

confidence: 99%

Removal of Cu(ii) from aqueous solution using Fe₃O₄–alginate modified biochar microspheres

Wang

Dong

et al. 2017

RSC Adv.

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Magnetic microspheres (MM) were prepared using calcium alginate (CA) encapsulated biochar (BC) and with pseudo-second-order kinetics. The overall orders for fitting the isotherm models are Langmuir > Freundlich for Cu(II). Mechanism studies showed that coordination and ion exchange were the major mechanism for Cu(II) removal by the MM. Moreover, the presence of the magnetic particles in the microspheres allowed easy separation of the material from aqueous solutions. This study provides an effective method for biochar modification.

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Adsorption of arsenic by activated carbon, calcium alginate and their composite beads

Cited by 135 publications

References 29 publications

Application of biopolymer composites in arsenic removal from aqueous medium: A review

Application of biopolymer composites in arsenic removal from aqueous medium: A review

A Comparative Study on Removal of Hazardous Anions from Water by Adsorption: A Review

Removal of Cu(ii) from aqueous solution using Fe₃O₄–alginate modified biochar microspheres

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Adsorption of arsenic by activated carbon, calcium alginate and their composite beads

Cited by 135 publications

References 29 publications

Application of biopolymer composites in arsenic removal from aqueous medium: A review

Application of biopolymer composites in arsenic removal from aqueous medium: A review

A Comparative Study on Removal of Hazardous Anions from Water by Adsorption: A Review

Removal of Cu(ii) from aqueous solution using Fe3O4–alginate modified biochar microspheres

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Removal of Cu(ii) from aqueous solution using Fe₃O₄–alginate modified biochar microspheres