Functionalized mesoporous organo-silica nanosorbents for removal of chromium (III) ions from tanneries wastewater

Gervas, Charles; Mubofu, Egid B.; Mdoe, J. E. G.; Revaprasadu, Neerish

doi:10.1007/s10934-015-0058-y

Cited by 16 publications

(18 citation statements)

References 19 publications

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“…higher Cr(VI) removal rates as compared to that of 3N-MCMONs. This is related to the larger specific surface areas seen for 1N-MCMONs and 2N-MCMONs (see Table 1) [60] . Table 2), indicating that higher number of amino groups (hence a greater number of adsorption sites) plays a dominant role in Cr(VI) removal at the later stage.…”

Section: During the Initial Stage (< 40min) 1n-mcmons And 2n-mcmons mentioning

confidence: 95%

Amino‐Functionalized Multilayer Core–Shell Mesoporous Organosilica Nanospheres for Cr(VI) Removal

Lai

Sun

Hou

et al. 2018

Adv Materials Inter

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Developing low-cost and highly efficient adsorbents for the removal of toxic heavy metal ions has been the subject of intensive research with the increasingly stringent water pollution control standards. In this paper, three types of amino-functionalized multi-layer core-shell mesoporous organosilica nanospheres (MCMONs) have been synthesized using an indirect co-condensation method for Cr(VI) removal applications. Results show that amino groups have been successfully immobilized on the nanospheres and these amino-functionalized MCMONs exhibit unique organic-inorganic multi-layer core-shell structures . When used as adsorbent for Cr(VI) removal, our N-(3-trimethoxysilylpropyl)diethylenetriamine functionalized MCMONs exhibits an maximum adsorption capacity of 279.92 mg/g at initial Cr(VI) concentration of 150 mg/L. This is about 20% greater than the highest Cr(VI) adsorption capacity previously reported for other core-shell silica-based adsorbents, demonstrating the great potential of our MCMONs in Cr(VI) removal applications.

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Section: During the Initial Stage (< 40min) 1n-mcmons And 2n-mcmons mentioning

confidence: 95%

Amino‐Functionalized Multilayer Core–Shell Mesoporous Organosilica Nanospheres for Cr(VI) Removal

Lai

Sun

Hou

et al. 2018

Adv Materials Inter

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“…A copolymer of the polyglycidyl methacrylate graft with functionalised iron oxide are used as the adsorbent in the removal of Cr(VI), at their effective pH 4.0 with the maximum adsorbent capacity of 132.5 and 162.9 mg/g, respectively [79]. A mesoporous silica nanoadsorbent surface modified with two distinct groups of nitrogen and sulphur and has been used in the treatment of metal Cr(III) ions from the waste pollutants [80]. The above synthesised nanoadsorbent via co-condensation strategy removes Cr(III) in the contact time of 30 min, pH 5.2 at the adsorption rate of 98% with the maximum adsorption capacity of 30 mg/g [80].…”

Section: Removal Of Chromiummentioning

confidence: 99%

“…A mesoporous silica nanoadsorbent surface modified with two distinct groups of nitrogen and sulphur and has been used in the treatment of metal Cr(III) ions from the waste pollutants [80]. The above synthesised nanoadsorbent via co-condensation strategy removes Cr(III) in the contact time of 30 min, pH 5.2 at the adsorption rate of 98% with the maximum adsorption capacity of 30 mg/g [80].…”

Section: Removal Of Chromiummentioning

confidence: 99%

Review on nanoadsorbents: a solution for heavy metal removal from wastewater

Thekkudan

Vaidyanathan

Kumar³

et al. 2016

IET nanobiotechnol.

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Elimination of heavy metals from contaminated streams is of prime concern due to their ability to cause toxic chaos with the metabolism of flora and fauna alike. Use of advanced nano-engineered technologies such as the innovative combination of surface chemistry, chemical engineering fundamentals and nanotechnology opens up particularly attractive horizons towards treatment of heavy metal contaminated water resources. The obtained product of surface engineered nanoadsorbent produced has successfully proven to show rapid adsorption rate and superior sorption efficiency towards the removal of a wide range of defiant heavy metal contaminants in wastewater. The use of these materials in water treatment results in markedly improved performance features like large surface area, good volumetric potential, extra shelf-lifetime, less mechanical stress, stability under operational conditions with excellent sorption behaviour, no secondary pollution, strong chelating capabilities and they are easy to recover and reuse. This review intends to serve as a one-stop-reference by bringing together all the recent research works on nanoparticles synthesis and its advantages as adsorbents in the treatment of heavy metal polluted wastewater that have so far been undertaken, thereby providing researchers with a deep insight and bridging the gap between past, present and future of the elegant nanosorbents.

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“…However, sunflower is an edible oil and therefore its use as raw material in industries is highly likely to face competition from food production. Mesoporous materials prepared using sunflower oil have pore diameter of up to 10.1 nm with surface area of 734.1 m 2 /g [45].…”

Section: Sunflower Oil Templated Mesoporous Silica (So-mts)mentioning

confidence: 99%

Mesoporous Materials Prepared Using Cashew Nut Shell Liquid and Castor Oil as Surfactants

Mgaya¹,

Mubofu²

2019

Mesoporous Materials - Properties and Applications

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Preparation of useful materials using renewable resources, which are not in competition with food production is of particular importance in the current efforts to replace non-renewable resources. One example of a potential renewable resource, which is attracting the attention of researchers in the preparation of useful materials is cashew nut shell liquid (CNSL). CNSL which is a by-product of cashew processing factories, is a mixture of four potential compounds, namely anacardic acid, cardanol, cardol and 2-methyl cardol. Among other potential applications, cashew nut shell liquid is a good template source for preparation of mesoporous materials. Heterogeneous catalysts prepared using CNSL templates are more efficient than those prepared using the commercially available templates. The pore sizes of mesoporous materials prepared using CNSL templates are large (up to 25 nm) enough to immobilize enzymes. Another renewable resource; castor oil, has also been reported to be a good template source for preparation of mesoporous materials. This chapter therefore is aimed at describing in detail the preparation, characterization and applications of mesoporous materials templated by cashew nut shell liquid and castor oil.

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Functionalized mesoporous organo-silica nanosorbents for removal of chromium (III) ions from tanneries wastewater

Cited by 16 publications

References 19 publications

Amino‐Functionalized Multilayer Core–Shell Mesoporous Organosilica Nanospheres for Cr(VI) Removal

Amino‐Functionalized Multilayer Core–Shell Mesoporous Organosilica Nanospheres for Cr(VI) Removal

Review on nanoadsorbents: a solution for heavy metal removal from wastewater

Mesoporous Materials Prepared Using Cashew Nut Shell Liquid and Castor Oil as Surfactants

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