Novel composite biopolymers of sodium alginate/natural rubber/coconut waste for adsorption of Pb(II) ions

Abstract

A novel composite adsorbent in the form of beads for removal of Pb 21 from wastewater was prepared by blending a sodium alginate (NaAlg) solution, natural rubber (NR) latex, and coconut waste (cofiber). After being crosslinked by calcium chloride, the beads were highly stable, flexible, and easily used in the environment. The optimum composition of the beads with an average size of 1.1-1.2 mm was 4% NaAlg:NR latex (60% dry rubber content):cofiber at 50:1:0.72 and a 2%w/w CaCl 2 solution used for cross linking. The physico-chemical properties of the beads were examined by the swelling ratio measurement, ATR-FTIR, and SEM. The effects of the amount of cofiber, NR, and initial Pb 21 ions, the pH of the medium, the bead content, and the contact time, on the adsorption of Pb 21 were investigated. NR improved the water resistance and, hence, the stability of the beads. The cofiber increased the porosity and contact area and, hence, the efficiency of the composite beads to adsorb the Pb 21 up to 99.6%. The prepared beads are promising material to use for the effective and economical removal of Pb 21 from water. POLYM. COMPOS., 35:1013-1021,

Green Natural Rubber Composites Reinforced with Black/White Rice Husk Ashes: Effects of Reinforcing Agent on Film’s Mechanical and Dielectric Properties

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Construction of a novel double network polymer composite and evaluation of its highly efficient adsorption properties for copper ions

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Preparation and characterization of rice husk ash filled natural rubber film: effect of cross-linking agents on mechanical and electrical properties

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