Removal of copper ions from aqueous solution using silica derived from rice straw: comparison with activated charcoal

Sharaf, Gehan; Hassan, H. S.

doi:10.1007/s13762-013-0343-8

Cited by 18 publications

(9 citation statements)

References 37 publications

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“…Several methods have been developed to remove heavy metal ions from aqueous solutions, and adsorption is one of the most frequently used techniques. The adsorbents adopted in the literature include waste dust (Wang and Lin 2008;Amarasinghe and Williams 2007;Sharaf and Hassan 2014;Singh et al 2014), clays (Ö zcan et al 2009), polymer fibers (Deng et al 2003), and porous silica (Feng et al 1997;Liu et al 2000;Lam et al 2006;Walcarius et al 2003;Vasudevan et al 2011;Blitz et al 2007;Aguado et al 2009Aguado et al , 2008Xia et al 2010;Da'na and Sayari 2011;Shahbazi et al 2011;Liang et al 2009;Kao et al 2008;Chandra et al 2010). Still, researches toward the development of efficient adsorbents for the removal of heavy metals from wastewater are of great concern.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Pb(II) and Cu(II) metal ions on functionalized large-pore mesoporous silica

Lee

Chen

Cheng

et al. 2015

Int. J. Environ. Sci. Technol.

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Adsorption of copper and lead ions in aqueous solutions onto large-pore mesoporous silica materials functionalized with amino and mercapto groups and those with different morphologies including fiber-like, rod-like, and platelet was studied. The synthesized materials were characterized by techniques such as X-ray powder diffraction, nitrogen adsorption-desorption isotherms, scanning electron microscopy, and infrared spectra. Batch experiments were conducted to determine the adsorption processes. The equilibrium adsorption data agreed with Langmuir isotherms and revealed that four amino groups were required to form a stable surface complex with copper ions. Results indicated that initial adsorption rate onto platelet mesoporous adsorbent was rapid and faster than that of rod-like and fibrous morphologies due to its short channeling pores. Thiol-functionalized mesoporous silica adsorbents of all the morphologies have a better affinity for Pb 2? than the amino-mesoporous silica. In contrast, aminomesoporous silica has a stronger affinity for Cu 2? compared to thiol-mesoporous silica. The optimal Pb 2? uptake on thiol-mesoporous silica was in solution with pH in 2-6, while the highest Cu 2? uptake on amino-mesoporous silica was at pH 5.

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Section: Introductionmentioning

confidence: 99%

Adsorption of Pb(II) and Cu(II) metal ions on functionalized large-pore mesoporous silica

Lee

Chen

Cheng

et al. 2015

Int. J. Environ. Sci. Technol.

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“…There is also no requirement for a chemical "swap" or exchange to occur, which improves the quality of the treated liquid phase. It is these practical considerations with ion exchange membranes being generally limited by relatively high capital and operating costs, as well as technical or economic constraints [32], that have seen many industries moving away from these systems. Functionalised silica on the other hand have a low operating cost and can be optimized to work in environments with high dissolved organic carbon and low pH [33].…”

Section: The Development Of Fmsn and Its Principles Of Adsorptionmentioning

confidence: 99%

Functionalized Mesoporous Silicon Nanomaterials in Inorganic Soil Pollution Research: Opportunities for Soil Protection and Advanced Chemical Imaging

et al. 2020

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Innovative actions towards a pollution free-planet" is a goal of the United Nations Environment Assembly (UNEA). Aided by both the Food and Agricultural Organisation (FAO) and its Global Soil Partnership under the 3rd UNEA resolution, a consensus from > 170 countries have agreed a need for accelerated action and collaboration to combat soil pollution. This initiative has been tasked to find new and improved solutions to prevent and reduce soil pollution, and it is in this context that this review provides an updated perspective on an emerging technology platform that has already provided demonstrable utility for measurement, mapping, and monitoring of toxic trace elements (TTEs) in soils, in addition to the entrapment, removal, and remediation of pollutant sources. In this article, the development and characteristics of functionalized mesoporous silica nanomaterials (FMSN) will be discussed and compared with other common metal scavenging materials. The chemistries of the common functionalizations will be reviewed, in addition to providing an outlook on some of the future directions/applications of FMSN. The use of FMSN in soil will be considered with some specific case studies focusing on Hg and As. Finally, the advantages and developments of FMSN in the widely used diffusive gradients-in-thin films (DGT) technique will be discussed, in particular, its advantages as a DGT substrate for integration with oxygen planar optodes in multilayer systems that provide 2D mapping of metal pollutant fluxes at submillimeter resolution, which can be used to measure detailed sediment-water fluxes as well as soil-root interactions, to predict plant uptake and bioavailability.

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“…The results show that the adsorption quantity remained nearly constant and keep a high value with the pH values increasing from 2.0 to 7.0, but when pH >7, the adsorption quantity were significantly decreased. The above phenomenon may be due to the serious decomposition of FZD in the alkaline medium (Sharaf and Hassan, 2014), therefore, the pH was adjusted to 6.0 in the later studies. The influence of pH on adsorption of Cu(II) is shown in Fig.…”

Section: Effect Of Ph On Adsorption Capacitymentioning

confidence: 99%

Adsorption Behavior of Magnetic Multiwalled Carbon Nanotubes for the Simultaneous Adsorption of Furazolidone and Cu(II) from Aqueous Solutions

LiuJianming

WangChao

XiongZhenhu

2015

Environmental Engineering Science

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A magnetic multiwalled carbon nanotubes (MWCNTs) nanocomposite was synthesized and was used as an adsorbent for removal of furazolidone (FZD) and Cu(II) from aqueous solutions. Influence of parameters on the adsorption capacity, including initial pH, contact time, and temperature, were investigated. Langmuir and Freundlich adsorption models were used for the mathematical description of adsorption equilibrium. Experimental data were analyzed by pseudo first order, pseudo second, and intraparticle diffusion order kinetic models. Thermodynamic parameters such as DH 0 , DS 0 , and DG 0 calculated from adsorption process revealed that the adsorption process was spontaneous, exothermic, and a physical process in the experimental temperature range. Cu(II) had a strong suppression effect on FZD binding in the simultaneous adsorption and FZD preloading experiment. As for Cu(II) simultaneous adsorption and preloading, the impact of FZD on Cu(II) desorption was almost negligible. The practical application of magnetic MWCNTs and regeneration of magnetic MWCNTs for several cycles using hydrochloric acid and N,N-dimethylformamide were also investigated. Results of the study showed that the carbon nanotubes have good regeneration property and can be used as potential adsorbent for FZD and Cu(II) in water/wastewater.

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Removal of copper ions from aqueous solution using silica derived from rice straw: comparison with activated charcoal

Cited by 18 publications

References 37 publications

Adsorption of Pb(II) and Cu(II) metal ions on functionalized large-pore mesoporous silica

Adsorption of Pb(II) and Cu(II) metal ions on functionalized large-pore mesoporous silica

Functionalized Mesoporous Silicon Nanomaterials in Inorganic Soil Pollution Research: Opportunities for Soil Protection and Advanced Chemical Imaging

Adsorption Behavior of Magnetic Multiwalled Carbon Nanotubes for the Simultaneous Adsorption of Furazolidone and Cu(II) from Aqueous Solutions

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