Silica-clay nanocomposites for the removal of antibiotics in the water usage cycle

Levard, Clément; Hamdi-Alaoui, Karima; Baudin, I.; Guillon, A.; Borschneck, Daniel; Campos, Andréa; Bizi, Mohamed; Benoit, Florence; Chanéac, Corinne; Labille, Jérôme

doi:10.1007/s11356-020-11076-5

Cited by 10 publications

(2 citation statements)

References 33 publications

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“…Different applications can be found in multiple domains such as depollution, catalysis, synthesis of new products, and treatment of oils. Smectites clays display accessible inter-sheet spaces that allow the intercalation of organic polymers or monomers as well as inorganic compounds such as TiO2, SiO2 and TiO2-SiO2 [11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Low-cost pathways to synthesize silica-smectite clay-based composites

Kepdieu

Djangang

Njimou

et al. 2023

Preprint

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The present study aimed at using rice husk as a natural silica precursor in the fabrication of silica-smectite composites. A local smectite clay was respectively mixed with 1) silica sludge from rice husk ashes after an acid treatment, 2) an aqueous sodium silicate solution from alkaline dissolution of silica sludge and 3) a nanosilica powder obtained after hydroxylation/polymerisation of a sodium silicate solution. Products from the three different synthesis pathways were investigated by XRD, infrared spectrometry, SEM/EDX and BET specific surface measurement. They show a heterogeneous morphology where the distribution of silica particles in the clay matrix change with each synthesis pathway. For silica sludge synthesis pathway, a predominated three-dimensional-like structure with a phyllosilicate matrix skeleton was obtained. For the pathway using a silicate solution, we obtained an amorphous compound having a limited intergranular cohesion and containing silicate agglomerates that are intercalated between clay sheets. It is different for the nanosilica reinforced pathway that led to a packed morphology with a regular distribution of silica phases in the clay matrix. In all the synthesized composites, we observe the occurrence of amorphous silica phases that favours both the existence of porosity and the presence of chemically active sites. Consequently, obtained products are potential multifunctional materials.

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Section: Introductionmentioning

confidence: 99%

Low-cost pathways to synthesize silica-smectite clay-based composites

Kepdieu

Djangang

Njimou

et al. 2023

Preprint

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show abstract

“…11,19,20 It is also simple to integrate into existing wastewater treatment systems. 21 Several adsorbents have been developed for the removal of antibiotics such as activated carbon 22,23 clays, 24,25 biomass including chitosan, corn cob, banana peel, coffee husk [26][27][28][29] and synthetic metal oxides. 27 Some of these adsorbents do have drawbacks, though.…”

Section: Introductionmentioning

confidence: 99%