Cd(II) adsorption on various adsorbents obtained from charred biomaterials

Li, Zhenze; Tanaka, Katsumi; Imaizumi, Shigeyoshi; Tang, Xiaowu; Inui, Tomoyuki

doi:10.1016/j.jhazmat.2010.07.040

Cited by 32 publications

(8 citation statements)

References 40 publications

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“…A variety of adsorbents, including clays, zeolites, dried plant parts, agricultural waste biomass, biopolymers, metal oxides, microorganisms, sewage sludge, fly ash and activated carbon have been used for cadmium removal [2,[7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Nano zerovalent iron (nZVI), an emerging technology, is being used to successfully treat various metallic ions in aqueous solutions (e.g., Cr 6+ , Cu 2+ , Pb 2+ , Ba 2+ , As 3+ , As 5+ , and Co 2+ ) [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Kinetics and thermodynamics of cadmium ion removal by adsorption onto nano zerovalent iron particles

Boparai

Joseph

O'Carroll

2011

Journal of Hazardous Materials

1,289

575

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Section: Introductionmentioning

confidence: 99%

Kinetics and thermodynamics of cadmium ion removal by adsorption onto nano zerovalent iron particles

Boparai

Joseph

O'Carroll

2011

Journal of Hazardous Materials

1,289

575

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“…Adsorption has been developed as an efficient method for the removal of heavy metals from contaminated water and soil. A variety of adsorbents, including clays, zeolites, dried plant parts, agricultural waste biomass, biopolymers, metal oxides, microorganisms, sewage sludge, ash and activated carbon have been used for cadmium removal [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ]. Cost is an important parameter for comparing adsorbent materials [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Kinetic, Equilibrium and Thermodynamic Studies of Cadmium (II) Adsorption by Modified Agricultural Wastes

2011

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Agricultural wastes have great potential for the removal of heavy metal ions from aqueous solution. The contamination of water by toxic heavy metals is a worldwide environmental problem. Unlike organic pollutants, the majority of which are susceptible to biological degradation, heavy metals do not degrade into harmless end products. Discharges containing cadmium, in particular, are strictly controlled because of the highly toxic nature of this element and its tendency to accumulate in the tissues of living organisms. This work aims to develop inexpensive, highly available, effective metal ion adsorbents from natural wastes as alternatives to existing commercial adsorbents. In particular, Tamrix articulata wastes were modified chemically by esterification with maleic acid to yield a carboxyl-rich adsorbent. The adsorption behavior of treated Tamrix articulata wastes toward cadmium ions in aqueous solutions in a batch system has been studied as a function of equilibration time, adsorbent dose, temperature and pH. Results showed that the maximum adsorption capacity was 195.5 mg/g in a pH 4 solution at 30 °C with a contact time of 120 min, an initial concentration of 400 mg/L and an adsorbent dose of 0.3 g/L. The kinetic data were analyzed using pseudo-first-order and pseudo-second-order kinetic models. It was shown that the adsorption of cadmium could be described by a pseudo-second-order equation. The experimental data were also analyzed using the Langmuir and Freundlich models of adsorption. Thermodynamic parameters such as ΔGo, ΔHo and ΔSo have been evaluated and it has been found that the sorption process was spontaneous and exothermic in nature. From all of our data, we conclude that the treated Tamrix articulata wastes investigated in this study showed good potential for cadmium removal from aqueous solutions.

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“…From among these techniques, adsorption is not only an attractive and cost-effective technology but it is also flexible in design and operation, and in many cases, it generates highquality treated effluents [11][12][13][14][15][16][17][18][19][20][21][22][23][24]. A large number of adsorbents, such as clays [7], dried plant parts [25], agricultural waste biomass [26,27], metal oxides [28], sewage sludge [29], saw dust [30], charred biomaterials [31], microorganisms, fly ash [32], and zeolites [33], have so far been employed to remove cadmium from either water or soil environments. In comparison with conventional adsorbents, magnetic nanoparticles can be manipulated or recovered swiftly using an external magnetic field.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Adsorption of cadmium onto modified nanosized magnetite: kinetic modeling, isotherm studies, and process optimization

Babaei

Bahrami

Firouzi

et al. 2014

Desalination and Water Treatment

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In this study, adsorptive removal of cadmium(II) from aqueous solutions using sodium dodecyl sulfate-modified magnetite nanoparticles was modeled. To this aim, central composite design as one of the most favorable designs in response surface methodology (RSM) was employed to optimize the removal of Cd(II) from solution under different variables such as adsorbent dosage (0.1-0.55 g), initial ion concentration (6-90 mg/L), and reaction time (5-30 min). Furthermore, the experimental data of Cd(II) adsorption were tested with various kinetic and isotherm models at various initial ion concentrations of 10-50 mg/L and adsorbent dosages of 0.1-0.25 g. The adsorption process followed the intra-particle diffusion model (R 2 > 0.94) very well. The equilibrium adsorption data were analyzed using various isotherm models. The results showed that Freundlich isotherm, with a relatively high coefficient of determination (R 2 > 0.96), fits well with the experimental results of Cd(II) adsorption. Ultimately, the optimum Cd(II) ions removal of 91.07% was obtained at the reaction time of 30 min, the adsorbent dosage of 0.35 g, and the initial ion concentration of 30 mg/L.

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Cd(II) adsorption on various adsorbents obtained from charred biomaterials

Cited by 32 publications

References 40 publications

Kinetics and thermodynamics of cadmium ion removal by adsorption onto nano zerovalent iron particles

Kinetics and thermodynamics of cadmium ion removal by adsorption onto nano zerovalent iron particles

Kinetic, Equilibrium and Thermodynamic Studies of Cadmium (II) Adsorption by Modified Agricultural Wastes

Adsorption of cadmium onto modified nanosized magnetite: kinetic modeling, isotherm studies, and process optimization

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