One-pot synthesis of carbon supported calcined-Mg/Al layered double hydroxides for antibiotic removal by slow pyrolysis of biomass waste

Abstract

A biochar supported calcined-Mg/Al layered double hydroxides composite (CLDHs/BC) was synthesized by a one-pot slow pyrolysis of LDHs preloaded bagasse biomass. Multiple characterizations of the product illustrated that the calcined-Mg/Al layered double hydroxides (CLDHs) were successfully coated onto the biochar in slow pyrolysis of pre-treated biomass. The as-synthesized CLDHs/BC could efficiently remove antibiotic tetracycline from aqueous solutions. The coating of CLDHs significantly increased the adsorption ability of biochar, and CLDHs/BC exhibited more than 2 times higher adsorption capacity than that of the pristine biochar (BC) in the tested pH range. The maximum adsorption capacity of CLDHs/BC for tetracycline was 1118.12 mg/g at 318 K. The experimental results suggested that the interaction with LDHs on biochar played a dominant role in tetracycline adsorption, accompanied with π–π interaction and hydrogen bond. This study provides a feasible and simple approach for the preparation of high-performance material for antibiotics contaminated wastewater treatment in a cost-effective way.

Titanium dioxide‐coated biochar composites as adsorptive and photocatalytic degradation materials for the removal of aqueous organic pollutants

“…It exhibits some desirable properties such as a large surface area, good ion exchange capacity, and high porosity, and has abundant oxygen functional groups and an aromatic surface . Recently, there have been various reports on the utilisation of BC for wastewater treatment and remediation of contaminated soil, owing to its cost‐effectiveness for the removal of chemical contaminants, namely, heavy metals and organic contaminants . There have also been several interesting proposals for the use of BC as a stabiliser of nano‐sized metal oxides which tend to aggregate because of their high surface energy and strong magnetic attraction, leading to reduced effective surface area and contact area when used for the removal of pollutants .…”

“…1,2 Recently, there have been various reports on the utilisation of BC for wastewater treatment and remediation of contaminated soil, owing to its cost-effectiveness for the removal of chemical contaminants, namely, heavy metals and organic contaminants. [3][4][5][6][7][8] There have also been several interesting proposals for the use of BC as a stabiliser of nano-sized metal oxides which tend to aggregate because of their high surface energy and strong magnetic attraction, leading to reduced effective surface area and contact area when used for the removal of pollutants. [9][10][11][12][13][14] For instance, Jung et al explored combined electrochemical modifications for the fabrication of a MgO/biochar composite which exhibited excellent aqueous phosphate adsorption properties represented by a Langmuir-Freundlich maximum adsorption capacity of 620 mg-P g -1 .…”

Comparative study of rice husk biochars for aqueous antibiotics removal

“…Adsorption is one of the most practical and economical methods to remove pollutants, such as heavy metals, inorganics and organics, from liquid media. Various materials have been used as adsorbents to remove antibiotics . Parolo et al .…”

Quorum quenching activity of indigenous quorum quenching bacteria and its potential application in mitigation of membrane biofouling

“…Over the past several decades, many advanced technologies have been used in wastewater treatment, such as adsorption, coprecipitation and membrane filtration . The membrane filtration process gained its popularity for its low‐energy requirement, high separation efficiency, no phase changing, device simplicity, and environmental friendly properties .…”

“…Over the past several decades, many advanced technologies have been used in wastewater treatment, such as adsorption, coprecipitation and membrane filtration. [1][2][3][4] The membrane filtration process gained its popularity for its low-energy requirement, high separation efficiency, no phase changing, device simplicity, and environmental friendly properties. 5,6 Although membrane bioreactors (MBRs) and other filtration processes, such as reverse osmosis (RO), nanofiltration (NF) and ultrafiltration (UF), have been in commercial use for several decades, [5][6][7][8] membrane biofouling still remains an intractable problem that limits their development.…”