Abstract
This paper aims to synthesize hybrid materials with high pollutant-uptake capacity and low costbased based on Luffa cylindrica (L.C) and different percentage of Zn2+ in the presence and absence of alternating current (AC). Physico-chemical, morphological and structural characterizations of the hybrid materials were performed by Boehm method, point zero charge (pHpzc), infrared characterizations (IR), scanning electron microscopy (SEM), energy–dispersive spectroscopyand and X-ray photoelectron spectroscopy. The efficiency of the designed hybrid materials was optimized based on their performance in water depollution. Methylene blue (MB) and industrial textile wastewater were the investigated pollutants models. IR characterizations confirmed the fixation of Zn2+ onto the L.C by the creation of Zn-OH, Zn-O and Zn-O-C bonds. Boehm titration showed that the fixation of Zn2+ onto L.C is accompanied by an increase of the basic functions of its surface and subsequently an increase in the pHpzc. SEM results confirmed the fixation of Zn2+ onto the L.C coupling AC with biosorption showed an increase in the adsorbed amount of MB and speed when adding the 4% of Zn2+ compared to the pure L.C the Qm shifted from 3.22 to 9.84 and 8.81 mg/g, respectively, for hybrid materials synthesized under AC, in absence of AC and pure L.C.
Highlights
Textile dying wastewaters are classified among the most highly toxic effluents [1,2]
The fast and efficient pollutant removals are the basic benefits of this research
We have successfully synthesized a performing hybrid material based on Luffa cylindrica fibers and different percentage of zinc oxide (1%, 2%, and 4%) by an easy precipitation method under alternating current (AC)
Summary
Textile dying wastewaters are classified among the most highly toxic effluents [1,2]. Numerous processes have been suggested for treatment and purification such as biological treatment [3], coagulation-flocculation [4], adsorption [5], ultrafiltration [6], electrocoagulation [7], reverse osmosis [8]. The current research was devoted to water remediation through the valorization of the abundant renewable resource of cellulosic fibers [10]. Brown algae [11], Bacillus maceran [12], Posidonia oceanica [13], corn stigmas [14], Agave Americana [15], Luffa cylindrica [16], fly ash and red mud [17], raw date pits [18] and Phragmites australis [19] are widely used as a natural and cheap biosorbent for a pollutant removal. Achieving a quick adsorption kinetic with a high possibility of water reuse after filtration absolutely depends on the biosorbent efficiency. Hybrid materials are praised for intermediate properties between mineral and organic matter and for new interesting behaviors that allow them to be used in several fields of applications
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