Abstract
To confirm the capability and mechanisms of Sr(II) and Cs(I) adsorption from the aqueous phase using basil seed (BS), virgin BS, calcined BS (BS500 and BS1000), and enzymatically treated BS, namely Mannanase BGM (M-BS), Pectinase G (P-BS), Hemicellulase (H-BS), and Cellulase A (C-BS) was evaluated. The adsorption capabilities of Sr(II) and Cs(I) of various BS adsorbents were also evaluated. The quantity of Sr(II) and Cs(I) adsorbed onto BS was greater than that of BS500 or BS1000, suggesting that the physicochemical characteristics of the BS surface affected Sr(II) and Cs(I) removal from the aqueous phase. Furthermore, the quantity of Sr(II) and Cs(I) adsorbed onto virgin BS was greater than that of enzymatically treated BS, indicating that glucomannan or (1,4)-xylan in the cellulosic hydrocolloid of the BS strongly affected the adsorption capability of Cs(I) or Sr(II) (except for M-BS in Sr(II) adsorption). Our obtained results indicate that, as an adsorbent, BS was capable of removing Sr(II) and Cs(I) from the aqueous solution.
Highlights
The nuclear industry emerged around 1940, and humans have benefited in various ways from nuclear technologies
Calcined basil seed (BS) was prepared by carbonizing the BS in a muffle furnace at 500 ◦C or 1000 ◦C for 2 h which was denoted as BS500 and BS1000, respectively
A total of 0.05 g of adsorbents were mixed with 50 mL of Sr (II) or Cs (I) solution at 1–1000 μg/L, and the reaction mixtures were stirred at 100 rpm at 25 ◦C for 24 h
Summary
The nuclear industry emerged around 1940, and humans have benefited in various ways from nuclear technologies. Strontium (Sr(II)) and cesium (Cs(I)) are fission products of nuclear fuels contained in radioactive waste Because of their long half-life (Sr: 28.74 years, Cs: 30.04 years) and toxicity (such as their carcinogenic properties), technology for removing or separating these materials from water requires special attention [4,5,6,7]. Various studies have reported the production of low-cost adsorbents prepared from waste biomass for Sr(II) and Cs(I) removal from the aqueous phase [3,8,9,10,11]. Our previous studies reported on the capability of Sr(II) and Cs(I) removal from the aqueous phase using disposed human hair or waste biomass tapioca [14,15]. The obtained results explained the adsorption mechanism of BS on Sr(II) and Cs(I) which can be used to resolve the water environment and waste biomass material issues
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