Portable SA/CMC entrapped bimetallic magnetic fly ash zeolite spheres for heavy metals contaminated industrial effluents treatment via batch and column studies

• Published in: Scientific reports Vol. 12; no. 1; pp. 3430 - 17
• Main Authors: Angaru, Ganesh Kumar Reddy, Choi, Yu-Lim, Lingamdinne, Lakshmi Prasanna, Koduru, Janardhan Reddy, Yang, Jae-Kyu, Chang, Yoon-Young, Karri, Rama Rao
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 02-03-2022; Nature Publishing Group; Nature Portfolio
• Subjects: 639/301; 639/638; 704/172; Adsorption; Alginic acid; Bioaccumulation; Calcium chloride; Carboxymethylcellulose; Carboxymethylcellulose Sodium; Chromium; Coal Ash; Copper; Effluent treatment; Environmental perception; Fly ash; Heavy metals; Humanities and Social Sciences; Industrial effluents; Industrial pollution; Industrial wastewater; Kinetics; Magnetic Phenomena; Metal ions; Metals; Metals, Heavy; multidisciplinary; Nickel; Science; Science (multidisciplinary); Sodium alginate; Spectroscopy, Fourier Transform Infrared; Wastewater; Wastewater treatment; Water Pollutants, Chemical - analysis; Water treatment; Zeolites
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-022-07274-5

Heavy metals are perceived as a significant environmental concern because of their toxic effect, bioaccumulation, and persistence. In this work, a novel sodium alginate (SA) and carboxymethylcellulose (CMC) entrapped with fly ash derived zeolite stabilized nano zero-valent iron and nickel (ZFN) (SA/CMC-ZFN), followed by crosslinking with CaCl
2
, is synthesized and applied for remediation of Cu(II) and Cr(VI) from industrial effluent. The characterization of the adsorbent and its surface mechanism for removing metals were investigated using advanced instrumental techniques, including XRD, FT-IR, SEM–EDX, BET, and XPS. The outcomes from the batch experiments indicated that monolayer adsorption on homogeneous surfaces (Langmuir isotherm model) was the rate-limiting step in both heavy metals sorption processes. The maximum adsorption capacity of as-prepared SA/CMC-ZFN was 63.29 and 10.15 mg/g for Cu(II) and Cr(VI), respectively. Owing to the fact that the wastewater released from industries are large and continuous, a continuous column is installed for simultaneous removal of heavy metal ions from real industrial wastewater. The outcomes revealed the potential of SA/CMC-ZFN as an efficient adsorbent. The experimental breakthrough curves fitted well with the theoretical values of Thomas and Yoon-Nelson models. Overall, the results indicated that SA/CMC-ZFN is a viable, efficient, and cost-effective water treatment both interms of batch and column processes.