Role of humic acid entrapped calcium alginate beads in removal of heavy metals

Pandey, Ashok; Pandey, Shashank; Misra, Virendra; Devi, Santha

doi:10.1016/s0304-3894(02)00316-3

Cited by 59 publications

(21 citation statements)

References 14 publications

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“…Utilization of alginate sorbents is limited as its mechanical strength and durability are relatively low. Mechanical properties of alginates have been improved by combining it with other materials like activated carbon (Kim et al 2009), chitosan (Gotoha and Matsushima 2004), polyvinyl alcohol (Han et al 2012), cellulose (Tiwari and Dewangana 2008) and humic acid (Pandey et al 2003). The author (Mahmood et al 2015) modified alginate with calcium carbonate to develop a composite material and used it as an adsorbent for phosphate ions confiscation.…”

Section: Introductionmentioning

confidence: 99%

Adsorption studies of cadmium ions on alginate–calcium carbonate composite beads

et al. 2015

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Alginate-calcium carbonate composite material was prepared in the form of beads and characterized using Fourier transform infra red (FT-IR) spectroscopy and scanning electron microscope (SEM) techniques. The adsorption of Cd 2? ions was studied through batch experiments. The adsorption parameters such as contact time (120 min), adsorbent dose (1.5 g), initial metal ion concentration(10 mg/L), pH (6) and agitation speed (150 rpm) were optimized at room temperature. Langmuir and Freundlich isotherms were applied to the data and it was noted that the adsorption of Cd 2? ions is better explained by Freundlich model. The kinetic studies showed that the adsorption of Cd 2? ions followed pseudo-first order kinetics. Thermodynamic parameters like DG 0 , DH 0 and DS 0 were calculated and on the basis of these values it was established that the adsorption process is feasible and endothermic in nature. It was concluded from the study that the composite material of alginate and calcium carbonate can effectively be used to recover Cd 2? ions from wastewater.

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Section: Introductionmentioning

confidence: 99%

Adsorption studies of cadmium ions on alginate–calcium carbonate composite beads

et al. 2015

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“…Several alginate-based sorbents have been evaluated for metal uptake from aqueous solutions for possible application in water treatment processes. The most common preparations are calcium alginate gel beads, plain or with other metal binding-sorbents entrapped in the gel matrix [7][8][9][10][11][12][13][14][15]. Some authors use dry beads prepared by drying the conventional gel beads to produce a material easier to manipulate and with improved sorption properties [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Kinetic analysis of metal uptake by dry and gel alginate particles

Lagoa

Rodrigues

2009

Biochemical Engineering Journal

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“…Alginates have been widely used as additives in the pharmaceutical, medical and food industries for many years [17]. The sodium salt of alginic acid extracted from brown algae has been used as an encapsulating material for biomass [18], bacteria [19], humic acid [20], industry waste [21], sludge, goethite [22] or nano-sized materials [23,24] and has been tested as a promising material for biosorption.…”

Section: Introductionmentioning

confidence: 99%