Adsorption of Pb(II) from aqueous solution using new adsorbents prepared from agricultural waste: Adsorption isotherm and kinetic studies

Ghasemi, Maryam; Naushad, Mu.; Ghasemi, Nahid; Khosravi-fard, Y.

doi:10.1016/j.jiec.2013.09.050

Cited by 202 publications

(68 citation statements)

References 34 publications

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“…The desired sample was poured to the certain volume of water so that it could be used for the preparation of nanocomposite [21]. 2 . 4H 2 O in 50 mL of distilled water.…”

Section: Purification and Functionalization Of Cntsmentioning

confidence: 99%

“…ions in the environment and Pb ?2 metal ions adsorbed onto the surface of nanocomposite increases, but the adsorption efficiency decreases, as a result. Also, at alkaline pH values, lead ions precipitate quickly, and the reduction in the concentration of lead occurs in the form of Pb (OH) 2 and PbOH ? complexes.…”

Section: The Effect Of Phmentioning

confidence: 99%

“…Excessive amounts of lead can readily accumulate in marine animals like oysters, bivalves, and fishes. Considering its toxicity, non-biocompatibility, and non-biodegradability, it is essential that we remove lead effectively from water and wastewater through appropriate techniques [2]. Accordingly, the efficient removal of heavy metals, lead in particular, has been seriously taken into account.…”

Section: Introductionmentioning

confidence: 99%

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Kinetic and thermodynamic investigation into the lead adsorption process from wastewater through magnetic nanocomposite Fe3O4/CNT

Elmi

Hosseini

Taleshi

et al. 2017

Nanotechnol. Environ. Eng.

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In this study, magnetic nanocomposite Fe 3 O 4 / CNT was synthesized through chemical precipitation and was used for uptake of lead from wastewater. The nanocomposite was characterized by XRD, TEM, and FTIR spectroscopy. Batch adsorption experiments were performed to investigate the effects of such various parameters as the pH of solution, the contact time, and the adsorbent dosage on the adsorption efficiency of Fe 3 O 4 / CNT. The maximum lead adsorption was observed in pH = 3, 0.16 g of nanosorbent, the contact time of 40 min, and the temperature of 30°C. The maximum removal percentage of Pb ions in optimal conditions by Fe 3 O 4 /CNT was 95.5%. Despite the fact that the optimum pH = 3, the bath adsorption experiments were performed at pH = 6 ± 0.5. For water with high alkalinity, a problem related to microbiologically induced corrosion may occur. However, high acidic water can accelerate the corrosion rate by increasing the reaction rates or causing physical damage to the pipes. The pseudo-first order and pseudosecond order were used to evaluate the kinetic models and the mechanism of the adsorption. The results indicated that the pseudo-second-order kinetic model resulted in a satisfactory fit for the experimental data (R 2 = 0.99). The adsorption isotherms were analyzed using Langmuir and Freundlich models. The Freundlich isotherm proved to have a little better correlation compared with that of the Langmuir isotherm. The thermodynamic parameters indicate that there was a spontaneous endothermic reaction. The process was successfully applied in the treatment of battery wastewater where the presence of organic compounds, copper, lead, zinc, nickel, and cadmium is hardly influenced the removal efficiency of lead ions even after five successive cycles. The results also show that the nanocomposite has a high efficiency of lead removal from wastewater resources.

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“…The desired sample was poured to the certain volume of water so that it could be used for the preparation of nanocomposite [21]. 2 . 4H 2 O in 50 mL of distilled water.…”

Section: Purification and Functionalization Of Cntsmentioning

confidence: 99%

Section: The Effect Of Phmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Kinetic and thermodynamic investigation into the lead adsorption process from wastewater through magnetic nanocomposite Fe3O4/CNT

Elmi

Hosseini

Taleshi

et al. 2017

Nanotechnol. Environ. Eng.

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“…The application of biomass-derived char as an adsorbent is beneficial not only to the removal of pollutants but also to the reduction of carbon emissions. In particular, use of the byproduct biochar (obtained from fast pyrolysis of biomass aimed at the production of bio-oil) would provide an additional economic advantage [27][28][29][30][31][32][33][34][35][36][37][38][39].…”

Section: Characterization Of the Charmentioning

confidence: 99%

Adsorptive removal of atmospheric pollutants over Pyropia tenera chars

Lee¹,

Park²,

Lee³

et al. 2016

Carbon letters

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As a replacement for activated carbon, biochar was synthesized and used for the adsorptive removal of formaldehyde and nitrogen oxide. Biochar was produced from the fast pyrolysis of the red marine macro alga, Pyropia tenera. The P. tenera char was then activated with steam, ammonia and KOH to alter its characteristics. The adsorption of formaldehyde, which is one of the main indoor air pollutants, onto the seaweed char was performed using 1-ppm formaldehyde and the char was activated using a range of methods. The char activated with both the KOH and ammonia treatments showed the highest adsorptive removal efficiency, followed by KOH-treated char, ammonia-treated char, steam-treated char, and non-activated char. The removal of 1000-ppm NO over untreated char, KOH-treated char, and activated carbon was also tested. While the untreated char exhibited little activity, the KOH-treated char removed 80% of the NO at 50°C, which was an even higher NO removal efficiency than that achieved by activated carbon.

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“…The most commonly used adsorbent is activated carbon [15][16][17][18][19][20][21]. Among the alternative adsorbents that can replace activated carbon, biochar, a by-product of biomass pyrolysis, has recently received extensive attention because of its low cost [14,[22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41].…”

Section: Cu 2+ Removal Experimentsmentioning

confidence: 99%

Cu²⁺ion reduction in wastewater over RDF-derived char

Lee¹,

Park²,

Park³

et al. 2016

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Refuse-derived fuel (RDF) produced using municipal solid waste was pyrolyzed to produce RDF char. For the first time, the RDF char was used to remove aqueous copper, a representative heavy metal water pollutant. Activation of the RDF char using steam and KOH treatments was performed to change the specific surface area, pore volume, and the metal cation quantity of the char. N 2 sorption, Inductively Coupled Plasma-Atomic Emission Spectrometer (ICP-AES), and Fourier transform infrared spectroscopy were used to characterize the char. The optimum pH for copper removal was shown to be 5.5, and the steam-treated char displayed the best copper removal capability. Ion exchange between copper ions and alkali/alkaline metal cations was the most important mechanism of copper removal by RDF char, followed by adsorption on functional groups existing on the char surface. The copper adsorption behavior was represented well by a pseudo-second-order kinetics model and the Langmuir isotherm. The maximum copper removal capacity was determined to be 38.17 mg/g, which is larger than those of other low-cost char adsorbents reported previously.

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Adsorption of Pb(II) from aqueous solution using new adsorbents prepared from agricultural waste: Adsorption isotherm and kinetic studies

Cited by 202 publications

References 34 publications

Kinetic and thermodynamic investigation into the lead adsorption process from wastewater through magnetic nanocomposite Fe3O4/CNT

Kinetic and thermodynamic investigation into the lead adsorption process from wastewater through magnetic nanocomposite Fe3O4/CNT

Adsorptive removal of atmospheric pollutants over Pyropia tenera chars

Cu²⁺ion reduction in wastewater over RDF-derived char

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Adsorption of Pb(II) from aqueous solution using new adsorbents prepared from agricultural waste: Adsorption isotherm and kinetic studies

Cited by 202 publications

References 34 publications

Kinetic and thermodynamic investigation into the lead adsorption process from wastewater through magnetic nanocomposite Fe3O4/CNT

Kinetic and thermodynamic investigation into the lead adsorption process from wastewater through magnetic nanocomposite Fe3O4/CNT

Adsorptive removal of atmospheric pollutants over Pyropia tenera chars

Cu2+ion reduction in wastewater over RDF-derived char

Contact Info

Product

Resources

About

Cu²⁺ion reduction in wastewater over RDF-derived char