Testing of Alginate/Chitosan/Glass Bubbles Adsorbent for Copper Removal from Wastewater

Abstract

The present paper reported the obtaining of an environmental friendly adsorbent based on sodium alginate, chitosan and glass bubbles. CaCl2 was used as crosslinking agent for sodium alginate favoring the interactions by physical bonds between the negative groups (-COO) of biopolymer and the Ca ions. The experimental study to determine the Cu(II) uptake using an atomic absorption spectrometer was conducted in the testing stand at the 1:50 and 1:100 ratios between the adsorbent mass and the amount of pollutant in solution. The number of cycles of regeneration of the adsorbent material was also evaluated. The characterization of alginate/chitosan/glass bubbles adsorbent by scanning electron microscopy (SEM) coupled with energy dispersive spectrometer (EDS) and Fourier transform infrared spectroscopy (FTIR) showed that the Cu(II) was found out on the surface of adsorbent.

Adsorption of Copper (II) from Aqueous Solutions with Alginate/Clay Hybrid Materials

“…Massive amounts of industrial and agricultural water around the world are polluted by various types of contaminants that harm the environment and affect human health. Removing contaminants from effluents with sustainable adsorbent materials made from abundant and inexpensive cellulose, alginate, starch, chitosan is a feasible approach to deal with this problem [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. These polysaccharides are advantageous for the adsorption of heavy metals from aqueous solutions due to their low cost, biodegradability, and reduced carbon footprint and environmental impact.…”

“…Unfortunately, alginic acid in the adsorption process has not an adequate mechanical stability, and usually crosslinking and reinforcement with inorganic materials are applied. Binary composite beads based on alginate and cellulose [ 13 ] or starch and nanoclay [ 14 ] and ternary green composites containing sodium alginate and chitosan and glass bubble [ 4 ] are examples of environmentally friendly adsorbents fabricated to remove contaminants from aqueous solutions.…”

Walnut Shell Biowaste Valorization via HTC Process for the Removal of Some Emerging Pharmaceutical Pollutants from Aqueous Solutions

“…The PSO kinetic model focuses more on the chemisorption process and the dependence of adsorption capacity on time [ 60 ]. …”

The Tribology of Composite Materials Used for Manufacturing Brake Shoes

“…Characteristics of cast iron brake blocks are specified in the Specification No.1 /SFMR/SDT/2000 [6]. The use of clogs made of composite materials is made in accordance with the international standards [7][8][9][10][11][12] and the general conditions of certification require compliance with the norms in the field [13][14][15]. Type K clogs have a constant friction coefficient and higher than cast iron clogs.…”