Preparation and characterization of synthetic tobermorite (CaO–Al2O3–SiO2–H2O) using bio and municipal solid wastes as precursors by solid state reaction

Lamidi, Yinusa Daniel; Owoeye, Seun Samuel; Abegunde, Segun Michael

doi:10.1016/j.bsecv.2020.07.003

Cited by 7 publications

(11 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1 (a -b). From the SEM micrographs, it can be observed that both synthesized tobermorite particles exhibited similar morphological characteristics as reported by the authors' recent work [19].…”

Section: Morphological Characteristics/chemical Compositionsupporting

confidence: 84%

“…The SLSG is to serve as source of silica (SiO2) along with other needed oxides while the SS is a precursor for calcium oxide (CaO). The processing of the materials used and their chemical compositions have been reported by the authors' recent work [19]. A total of six ( 6) compositions (TbI -TbVI) comprising of varying weight percent mixtures of SLSG and SSA were prepared in this work which are well reported in the authors' recent work [19].…”

Section: Materials and Sample Preparationmentioning

confidence: 72%

“…The processing of the materials used and their chemical compositions have been reported by the authors' recent work [19]. A total of six ( 6) compositions (TbI -TbVI) comprising of varying weight percent mixtures of SLSG and SSA were prepared in this work which are well reported in the authors' recent work [19]. However, only two compositions (TbII and TbVI) shown in Table 1were utilized for the adsorption experiment.…”

Section: Materials and Sample Preparationmentioning

confidence: 77%

“…However, only two compositions (TbII and TbVI) shown in Table 1were utilized for the adsorption experiment. The selection of the two compositions was based on their microstructure, pores and chemical constituents [19].…”

Section: Materials and Sample Preparationmentioning

confidence: 99%

“…Two synthesized tobermorites (TbII and TbVI) were selected as the used sorbents for the adsorption experiments in this work. Their selection was based on their morphology, their corresponding chemical composition and Ca/Si ratio which might favour better adsorption [19].…”

Section: Batch Adsorption Experimentsmentioning

confidence: 99%

See 4 more Smart Citations

Removal of heavy metals (Cd and Pb) from aqueous solutions by adsorption using synthetic tobermorite prepared from bio-municipal wastes as adsorbent

Lamidi¹,

Owoeye²,

Abegunde³

2021

Global J. Eng. Tech. Adv.

View full text Add to dashboard Cite

Contamination of waters by discharge of heavy metals such as Lead (Pb), Cadmium (Cd), Zinc (Zn) etc. from various industrial activities poses a great threat to humans, plants and animals, and thus the need for their removal from waste waters. In this work, synthetic tobermorite was prepared using waste soda-lime-silica glass as silica precursor while snail shell ash was used as source of calcium oxide. Several compositions were formulated with varying combination of soda-lime glass and snail shell ash. The bodies were sintered at 950oC in an electric muffle furnace. Analyses such as scanning electron microscopy (SEM/EDS) and Fourier Transform Infra-red Spectroscopy (FT-IR) was used to assess the microstructure and functional groups present in the developed tobermorite. The synthetic tobermorite was further immersed in aqueous solutions containing heavy metals (Pb2+ and Cd2+) whilst parameters such as temperature, contact time, pH, adsorbent dosage, adsorbate concentration were used to assess the performance of the synthetic tobermorite. The results of the morphology shows that the tobermorites possess irregular and spherical shaped grain with coated water films while the EDS shows the presence of Ca and Si with small amount of Al confirming tobermorite while the FT-IR indicates Ca – O – Si and Si – O – Si as main functional groups. The adsorption experiment performed shows the tobermorite is effective in removal of heavy metals (Pb2+ and Cd2+) studied in this work. However, their performance was impaired at increase in temperature above room temperature.

show abstract

Section: Morphological Characteristics/chemical Compositionsupporting

confidence: 84%

Section: Materials and Sample Preparationmentioning

confidence: 72%