Industrial wastes as low-cost potential adsorbents for the treatment of wastewater laden with heavy metals

Ahmaruzzaman, Md.

doi:10.1016/j.cis.2011.04.005

Cited by 574 publications

(265 citation statements)

References 203 publications

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“…A general rule says that the sorption value increases with the increase in the initial concentration in the solution (Ahmaruzzaman 2011). It was found in our experiments that the maximum sorption values of Cd and Zn existed at the initial concentration of 1000 mg/dm 3 , while the highest value of Pb(II) was found at the initial concentration of 2000 mg/dm 3 (the maximum Pb(II) sorption was not defined for the selected initial concentrations).…”

Section: Multi-element Solution Effectmentioning

confidence: 79%

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Waste dolomite powder as an adsorbent of Cd, Pb(II), and Zn from aqueous solutions

et al. 2017

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Sorption experiments of the Cd, Zn, and Pb(II) ions from aqueous solutions on waste dolomite powder were investigated. Waste dolomite powder is inconvenient during storage due to fine particle size; therefore, its practical application is needed. The sorption experiments were conducted with variables: initial metal concentration (500, 1000, and 2000 mg/dm3 ) in single-and multi-element solutions, adsorbent dose (0.5, 1, and 2 g), and contact time (45, 90, and 180 min). Results showed that dolomite powder removed all ions from experimental solutions. For multi-element solution, Pb(II) was adsorbed almost in 100% at the initial concentration equal to 2000 mg/dm 3 . For Cd and Zn, sorption properties decreased with the increase in the initial metal concentration and the maximum values at the initial metal concentration of 500 mg/dm 3 were 42 and 47%, respectively. The results suggest that waste dolomite powder can be considered for application as sorbent in wastewater purification.

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Section: Multi-element Solution Effectmentioning

confidence: 79%

“…Consequently, large amounts of fine grain size waste minerals have to be dumped anyway. On the other hand, small particle size corresponds to large outer surface area of the material, as well as large adsorption surface (Ahmaruzzaman 2011).…”

Section: Introductionmentioning

confidence: 99%

Waste dolomite powder as an adsorbent of Cd, Pb(II), and Zn from aqueous solutions

et al. 2017

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“…There are various treatment processes available for treatment metal-contaminated water, such as, chemical precipitation, coagulation, oxidation with ozone/hydrogen peroxide, ion exchange, photo catalytic degradation, and adsorption [4]. Among of these methods, adsorption appears to be the most widely used for the removal of heavy metals [5].…”

Section: Introductionmentioning

confidence: 99%

Removal of Copper (II) Ions in Aqueous Solutions by Sorption onto Alkali Activated Fly Ash

et al. 2018

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Abstract. Fly ash is a particulate material produced from coal combustion power plants with major components are silica, alumina, iron oxide, calcium oxide, magnesium oxide, and carbon which are ideal for metal adsorbents. The potential use of fly ash in the wastewater treatment process is obvious because it can be obtained cheaply in large quatities and it can be used as an adsorbent. However, fly ash still shows lower adsorption capacity unless it is activated. In this study, fly ash activated by NaOH 14 M and KOH 14 M solutions. The batch experiments were carried out to study the sorption of copper ions from aqueous on alkali activated fly ash. The influence of initial concentration and contact time were examined at constant pH and dose of adsorbent. The sorption capacity of copper ions increased with the initial concentration and contact time. The sorption capacities followed the order Na1>Ka1>FA. The adsorption isotherm model exhibited that the Langmuir model is very suitable with copper ions adsorption onto fly ash and alkali activated fly ash. Kinetic study shows that adsorption of copper ions onto FA, Na1, and Ka1 follows the pseudo second-order kinetics.

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“…In comparison with organic contaminants, heavy metals are non-biodegradable and they can be accumulated in living organisms, causing various diseases and disorders. For these reasons, heavy metals must be removed from wastewater before their discharge into the aquatic environment (Ahmaruzzaman 2011). Nowadays, organic materials from plant wastes or by-product are often used instead of the costly conventional methods of metal ions removal from wastewater (Ngah and Hanafiah 2008;Fu and Wang 2011;Nayak et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Utilization of poplar wood sawdust for heavy metals removal from model solutions

Demcak¹,

Bálintová²,

Hurakova³

et al. 2017

Nova Biotechnologica Et Chimica

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Some kinds of natural organic materials have a potential for removal of heavy metal ions from wastewater. It is well known that cellulosic waste materials or by-products can be used as cheap adsorbents in chemical treatment process. In this paper, poplar wood sawdust were used for removal of Cu(II), Zn(II) and Fe(II) ions from model solutions with using the static and dynamic adsorption experiments. Infrared spectrometry of poplar wood sawdust confirmed the presence of the functional groups which correspond with hemicelluloses, cellulose and lignin. At static adsorption was achieved approximately of 80 % efficiency for all treated model solutions. Similar efficiency of the adsorption processes was reached after 5 min at dynamic condition. The highest efficiency of Cu(II) removal (98 %) was observed after 30 min of dynamic adsorption. Changes of pH values confirmed a mechanism of ion exchange on the beginning of the adsorption process.

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Industrial wastes as low-cost potential adsorbents for the treatment of wastewater laden with heavy metals

Cited by 574 publications

References 203 publications

Waste dolomite powder as an adsorbent of Cd, Pb(II), and Zn from aqueous solutions

Waste dolomite powder as an adsorbent of Cd, Pb(II), and Zn from aqueous solutions

Removal of Copper (II) Ions in Aqueous Solutions by Sorption onto Alkali Activated Fly Ash

Utilization of poplar wood sawdust for heavy metals removal from model solutions

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