Removal of amoxicillin and ampicillin using manganese dioxide/montmorillonite composite

Abstract

BACKGROUND Clay‐based materials represent great potential for the development of efficient and environmentally friendly sorbents. The study focuses on a laboratory‐obtained manganese dioxide/montmorillonite (MnO2/MMT) composite for removal of two types of antibiotics – amoxicillin (AMX) and ampicillin (AMP) – from aqueous solution. RESULTS The composite was successfully prepared using a reduction procedure involving the reaction between potassium permanganate (KMnO4) and hydrochloric acid (HCl) to form MnO2 followed by the addition of MMT. X‐ray analysis, scanning electron microscopy, X‐ray fluorescence and Fourier transform infrared spectroscopy were performed for characterization of physicochemical and structural properties, simultaneous thermogravimetry and differential scanning calorimetry for estimation of thermal stability and high‐performance liquid chromatography for determination of antibiotic equilibrium concentrations in aqueous solution. The precipitated MnO2 component, manifested by long fibers, corresponded to the tunnel structure of cryptomelane. In the case of MnO2/MMT it is evident that MnO2 developed short fibers with the participation of the MMT matrix. The thermal data suggested that the MnO2 phase upon contact with the clay support showed better thermal stability. The final decomposition of Mn2O3 was shifted to higher temperature of 985 °C. Adsorption procedure in a batch regimen showed sufficient sorption ability for both antibiotics with over 90% efficiency. For AMP the value of qmax was about 45 mg g−1 and for AMX it was only 21 mg g−1. CONCLUSIONS The results provided valuable information for the design of a potentially inexpensive clay‐based adsorbent and demonstrated the removal of two types of broad‐spectrum β‐lactam antibiotics from aqueous solution to a sufficient degree. © 2022 Society of Chemical Industry (SCI).

Experimental and simulation studies of hybrid MWCNT/montmorillonite reinforced FDM based PLA filaments with multifunctional properties enhancement

“…The solution lies in hybrid combination of MWCNT with other nanofillers which could reduce the overall toxicity without compromising the overall properties of the polymer. Montmorillonite (MMT) is another important non‐toxic nanofillers comprised of two‐dimensional nano‐phyllosilicate clay with a octahedral alumina sheet sandwiched between two tetrahedral silica sheets 12 . MMT has a vital role in accelerating biodegradability of PLA which could enhance its versatility in PLA matrix.…”

“…Montmorillonite (MMT) is another important non-toxic nanofillers comprised of two-dimensional nano-phyllosilicate clay with a octahedral alumina sheet sandwiched between two tetrahedral silica sheets. 12 MMT has a vital role in accelerating biodegradability of PLA which could enhance its versatility in PLA matrix. The hybrid combination of MWCNT and MMT is gaining research acceptance these days due to its non-toxicity and other superior properties which could not be achieved by either of these fillers.…”