TY - JOUR
T1 - Insights into logical method selection for modification of chitosan and alginate towards the adsorption of heavy metal ions
T2 - a review
AU - Benettayeb, Asmaa
AU - Hadj Brahim, Mustapha
AU - Lal, Basant
AU - Al-Farraj, Saleh
AU - Belkacem, Mohamed
AU - John Masamvu, Malbenia
AU - Haddou, Boumediene
AU - Ali Alkahtane, Abdullah
AU - Chia, Chin hua
AU - Sillanpaa, Mika
AU - Ghosh, Soumya
AU - Hosseini-Bandegharaei, Ahmad
N1 - Publisher Copyright:
© 2024 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2024
Y1 - 2024
N2 - Is it necessary to modify the structure of chitosan and alginate before their use in adsorption? If yes, what type of modification can be used, and what agent should be chosen for the modification? Is there a difference between grafting and crosslinking agents and what are the benefits of each after adsorption? This review article tries to answer these questions by comparing the efficiency of biosorption of certain metals on alginate and chitosan, both before and after modification. Understanding the limitations, benefits, and drawbacks of each type of modification is essential in the field of water and wastewater treatment. Hence, this review discusses the advantages and disadvantages of using each grafting agent and the benefits of modifying the alginate and chitosan adsorbents. It tries to develop insights into the linkage between selected modification agents and types of pollutants and their bonding preferences with respect to –O, –N, and –S atoms. Thus, it highlights the contributions of each functional group added to alginate and chitosan structures through grafting, cross-linking, or both. Also, it elaborates on the corresponding benefits of each functional group (or modification) in the biosorption process. The type of contribution of each type of modification to the sorption efficiency, the way pH changes affect, reduction in adsorbent dose, the mechanisms involved in the process, the nature of adsorption, and other added properties in comparison to their natural forms, are discussed in this review, and some perspectives are suggested for future studies. Based on the concepts and ideas discussed in the current review, one can make more informed and insightful choices when selecting and modifying the studied adsorbent.
AB - Is it necessary to modify the structure of chitosan and alginate before their use in adsorption? If yes, what type of modification can be used, and what agent should be chosen for the modification? Is there a difference between grafting and crosslinking agents and what are the benefits of each after adsorption? This review article tries to answer these questions by comparing the efficiency of biosorption of certain metals on alginate and chitosan, both before and after modification. Understanding the limitations, benefits, and drawbacks of each type of modification is essential in the field of water and wastewater treatment. Hence, this review discusses the advantages and disadvantages of using each grafting agent and the benefits of modifying the alginate and chitosan adsorbents. It tries to develop insights into the linkage between selected modification agents and types of pollutants and their bonding preferences with respect to –O, –N, and –S atoms. Thus, it highlights the contributions of each functional group added to alginate and chitosan structures through grafting, cross-linking, or both. Also, it elaborates on the corresponding benefits of each functional group (or modification) in the biosorption process. The type of contribution of each type of modification to the sorption efficiency, the way pH changes affect, reduction in adsorbent dose, the mechanisms involved in the process, the nature of adsorption, and other added properties in comparison to their natural forms, are discussed in this review, and some perspectives are suggested for future studies. Based on the concepts and ideas discussed in the current review, one can make more informed and insightful choices when selecting and modifying the studied adsorbent.
KW - Water treatment
KW - alginate
KW - biosorption
KW - bonding preference
KW - chitosan
KW - metal classification
KW - modification
KW - sorption performance
UR - http://www.scopus.com/inward/record.url?scp=85195697514&partnerID=8YFLogxK
U2 - 10.1080/21622515.2024.2354519
DO - 10.1080/21622515.2024.2354519
M3 - Review article
AN - SCOPUS:85195697514
SN - 2162-2515
VL - 13
SP - 398
EP - 420
JO - Environmental Technology Reviews
JF - Environmental Technology Reviews
IS - 1
ER -