Removal of lead ions from wastewater using magnesium sulfide nanoparticles caged alginate microbeads
- Authors
- Bidhendi, Mehdi Esmaeili; Parandi, Ehsan; Meymand, Masoumeh Mahmoudi; Sereshti, Hassan; Nodeh, Hamid Rashidi; Joo, Sang-Woo; Vasseghian, Yasser; Khatir, Nadia Mahmoudi; Rezania, Shahabaldin
- Issue Date
- Jan-2023
- Publisher
- ACADEMIC PRESS INC ELSEVIER SCIENCE
- Keywords
- Alginate microbeads; Magnesium sulfide nanoparticles; Lead removal; Adsorption equilibrium; Kinetic
- Citation
- ENVIRONMENTAL RESEARCH, v.216
- Journal Title
- ENVIRONMENTAL RESEARCH
- Volume
- 216
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/43449
- DOI
- 10.1016/j.envres.2022.114416
- ISSN
- 0013-9351
- Abstract
- In this study, an adsorbent made of alginate (Alg) caged magnesium sulfide nanoparticles (MgS) microbeads were used to treat lead ions (Pb2+ ions). The MgS nanoparticles were synthesized at low temperatures, and Alg@MgS hydrogel microbeads were made by the ion exchange process of the composite materials. The newly fabricated Alg@MgS was characterized by XRD, SEM, and FT-IR. The adsorption conditions were optimized for the maximum removal of Pb2+ ions by adjusting several physicochemical parameters, including pH, initial concentration of lead ions, Alg/MgS dosage, reaction temperature, equilibration time, and the presence of co -ions. This is accomplished by removing the maximum amount of Pb2+ ions. Moreover, the adsorbent utilized more than six times with a substantial amount (not less than 60%) of Pb2+ ions was eliminated. Considering the ability of sodium alginate (SA) for excellent metal chelation and controlled nanosized pore structure, the adsorption equilibrium of Alg@MgS can be reached in 60 min, and the highest adsorption capacity for Pb2+ was 84.7 mg/g. The sorption mechanism was explored by employing several isotherms. It was found that the Freundlich model fits the adsorption process quite accurately. The pseudo-second-order model adequately described the adsorption kinetics.
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