Removal of Pb(II) from Aqueous Solution by Ceramsite Prepared from Isfahan Bentonite and γ-Alumina

Mobasherpour, Iman; Javaherai, Masomeh; Salahi, E.; Ebrahimi, Mohsen; Ashrafi, Zahra; Orooji, Yasin

doi:10.23939/chcht15.02.263

Cited by 3 publications

(2 citation statements)

References 38 publications

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“…45-0937) [30]. The raw bentonite contains constituents such as quartz (JCPDS No 083-0539) [41], albite (JCPDS No 001-0739) [42], and montmorillonite (JCPDS No 002-0037) [43]. The diffraction peak at 26.66• (1 0 1) is consistent with the characteristic peaks of quartz.…”

Section: Characterizationsmentioning

confidence: 64%

Plant-based green fabrication of S-scheme CuO/CdO/bentonite heterojunction with enhanced photocatalytic performance for degradation of levofloxacin

Mahjoore

Honarmand

Aryafar

2022

Preprint

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In this research, for the first time, CuO and CdO nanoparticles (NPs) were synthesized and anchored on layered bentonite using Ferula persica in the interest of developing a novel S-scheme nano-heterojunction (denoted as CuO-CdO-BT). Ferula persica acted as a naturally-sourced reducing agent and stabilizer for the synthesis of NPs. The performance of CuO-CdO-BT was evaluated for the degradation of levofloxacin from aqueous solution under sunlight. The bentonite as a support not only reduced the agglomeration of CuO and CdO NPs, but also decreased the size of biosynthesized NPs, which in turn increased the active surface of NPs and the photodegardation efficiency. The effect of operational reaction system variables was examined in an attempt to optimize the photocatalytic capability of CuO-CdO-BT. Under optimum conditions (catalyst dosage = 0.4 g/L, LVF concentration = 10 mg/L and pH = 8), 96.11% of levofloxacin was degraded using CuO-CdO-BT after 30 min with degradation kinetic of 0.108 min− 1, which was about 2.4 and 4.2 times higher than those of bare CuO and CdO NPs, respectively. The prominent role of superoxide radicals (\({\text{O}}_{2}^{\bullet -})\) and hydroxyl radicals (·OH) was determined in the photocatalytic reaction by the radical quenching experiments. The possible levofloxacin pathways were suggested based on the HPLC-MS analysis. High stability was demonstrated for biosynthesized photocatalyst during recycling experiments and 88.56% degradation efficiency was obtained after three cycles of photodegradation. The unique structural features of the new generation of S-scheme heterojunction and green synthesis of NPs using plant provide promising photocatalysts with synergistic features to improve wastewater treatment.

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Section: Characterizationsmentioning

confidence: 64%

Plant-based green fabrication of S-scheme CuO/CdO/bentonite heterojunction with enhanced photocatalytic performance for degradation of levofloxacin

Mahjoore

Honarmand

Aryafar

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Using efficient and inexpensive adsorbents is one of the best ways to remove heavy metals from the environment. Several methods have been applied for heavy metals removal in aqueous solution, including chemical precipitation, 13 oxidation, 14 adsorption, [15][16][17] electrochemical, 18 biosorption, 19 integration of phytogreen, 20 membrane filtration, [21][22][23] ion exchange, 24 ion flotation, 25 coagulation, 26 and electrolysis. 27 However, most of these methods could not be used in full scale application due to their high operation cost, low efficiency or potential secondary pollution.…”

Section: Introductionmentioning

confidence: 99%