Bio-based Substances From Compost as Reactant and Active Phase for Selective Capture of Cationic Pollutants From Waste Water

Abstract

Alumina porous monoliths were successfully fabricated using a simple and reproducible synthesis dispersing gamma alumina phase from commercial boehmite (GAB) in water containing water-soluble bio-based substances (BBSs) obtained from composted biowaste. The wet mixture obtained was shaped in form of small spheres and then dried and calcined at 500°C in order to burn the organic matter and obtain mesoporous monoliths. They were successively functionalized with BBSs in order to introduce BBS functional groups and obtain an efficient adsorbing system. Therefore, in this work, BBSs acted as template/binder for the production of monoliths and as functionalizing agent of the produced monoliths. The reference powders, deeply studied in a published article (Sadraei et al., 2019b ), and the monoliths of GAB before and after functionalization were characterized by means of x-ray diffraction to evidence their crystal structure, Fourier transform infrared spectroscopy for evaluating the presence of BBSs on the supports, thermogravimetric analysis to measure the thermal stability of the materials and quantify the functionalizing BBS amount immobilized on the supports, nitrogen adsorption at 77 K for the investigation of the surface area and porosity of the systems, and zeta potential measurements to analyze the effect of BBS immobilization on the surface charge of the supports and to predict the type of interaction, which can be established with substrates. Finally, the systems were applied in removal of pollutants with different charge, polarity, and molecular structure, such as dyes (crystal violet and acid orange 7) and contaminants of emerging concern (carbamazepine and atenolol). Only the cationic dye CV is captured by the adsorbing material, and this allows envisaging a possible use of the functionalized monoliths for selective adsorption of cationic substrates.

How to increase sustainable production in the food sector? Mapping industrial and business strategies and providing future research agenda

“…The European Council stresses that waste management should prioritise food waste practices such as its reusability and recycling and preferably recovering valuable materials (Huang et al, 2021). In this vein, the recovered food waste can be applied for human consumption, creating energy, producing bio‐based substances and extracting valuable compounds such as proteins and fats (Magnacca et al, 2020; Rajeh et al, 2021; Sadraei, 2020). On the other hand, food waste management has also been considered an important sustainability objective by the United Nations 2030 Agenda (Calandra et al, 2022; Pizzi et al, 2020; Santagata et al, 2021).…”

“…be applied for human consumption, creating energy, producing biobased substances and extracting valuable compounds such as proteins and fats (Magnacca et al, 2020;Rajeh et al, 2021;Sadraei, 2020). On the other hand, food waste management has also been considered an important sustainability objective by the United Nations 2030 Agenda (Calandra et al, 2022;Pizzi et al, 2020;Santagata et al, 2021).…”

Novel Hydroxyapatite Beads for the Adsorption of Radionuclides from Decommissioned Nuclear Power Plant Sites

“…Among them, adsorption has been widely investigated as the most cost-effective, environmentally friendly method and the easiest technique for industrial application [9,10]. In this regard, various types of adsorbents, including biomass, clays, activated carbon, hydroxyapatite, metal particulates, and metal oxides functionalized with bio-based substances have been used to separate contaminants during water treatment [1,5,11].…”

Bio-Based Substances from the Compost of Bio-Waste for Decontamination of Waste Water

“…Water soluble Bio-Based Substances (BBS) extracted from bio-waste compost from gardening, urban food, and park trimming residues have found their use in the chemical and environmental industry, e.g., in the fields of detergent manufacture, textile industry, and photodegradation. They have also been used as binders in the synthesis of porous monolithic materials and functionalization of oxides to produce hybrid materials [1][2][3][4][5][6]. BBS has a potential application as a cost-effective source of valuable renewable bio-based materials in the chemical and consumer market.…”