Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 29, Issue 53, Pages 80716-80726Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-022-21305-8
Keywords
Alginate beads; Environmental protection; Fixed-bed column; Lead ions; Breakthrough modeling
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Funding
- Science, Technology & Innovation Funding Authority (STDF)
- Egyptian Knowledge Bank (EKB)
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The scientific impact of this work lies in the protection of the environment from hazardous pollutants using a column technique. Ni-alginate has been found to be a stable and efficient sorbent for removing lead ions, making it recommended for selective removal of Pb2+ from waste solutions. The breakthrough curves and modeling analysis further support the effectiveness of Ni-alginate.
The scientific impact of this work is the protection of the environment from hazardous pollutants using a column technique. Besides its higher stability at working pH and its time persisting, Ni-alginate has a higher ability to remove lead ions compared to the other prepared beads (Sr-alginate, Co-alginate, and Ca-alginate). Also, Ni-alginate possessed a higher removal percent, 93.3%, toward Pb2+ than the other ions, taking the sorption order of Pb2+ > Sr2+ > Co2+ > Cd2+ > Zn2+. Therefore, this study focused on using Ni-alginate as a selective sorbent for lead ions. Fixed-bed column was employed for the sorption process. The results for that efficiency are presented as breakthrough curves in view of the impact of various parameters; influent flow rate (1.5, 3.0, and 5.0 mL/min), lead concentration (100, 150, and 200 mg/L), and bed depth of sorbent (3.0, 5.0, and 7.0 cm). Breakthrough modeling including Thomas and Yan models was employed. The outcomes indicated that Thomas theory is more applicable. The overall outcomes indicated that Ni-alginate is recommended for selective removal of Pb2+ from waste solutions.
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