期刊
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
卷 96, 期 4, 页码 923-929出版社
WILEY
DOI: 10.1002/jctb.6600
关键词
arsenic; iron‐ nanoparticle; groundwater; improvement
类别
资金
- National Agency of Scientific and Technological Promotion (ANPCyT) [PICT 2016-1611]
- Santa Fe Province Agency of Science, Technology and Innovation ASACTEI [AC 2015-0005]
- National University of Rosario (UNR) [BIO517]
This study demonstrates the great capacity of a hybrid sorbent using chitosan doped with iron nanoaggregates to eliminate As(V) in groundwater, and identifies a method to optimize operating values.
BACKGROUND Due to a variety of toxicological problems, the presence of As(V) in aquifers is a significant concern. Sorption using chitosan doped with iron nanoaggregates results in a green and cheap methodology for its elimination. RESULTS The hybrid sorbent was characterized by SEM, EDS, TGA, XRD, and FTIR spectroscopy. Its stability against pH and time was determined by ICP-MS, while conventional analytical techniques verified its Fe content. The sum of an individual As(V) removal capacity by chitosan and iron nanoaggregates was smaller than that of the hybrid sorbent, indicating the existence of synergy. CONCLUSION This study demonstrates the great capacity of the hybrid sorbent to eliminate As(V) working with a continuous system (columns). The additional use of a factorial design allows for determining of optimal operating values to optimize two responses. In other words, in this multi-response system, column service time (tb) was minimized and, at the same time, it maximized the volumes of purified water obtained ([As(V)] <0.05 m L-1) using desirability function. (c) 2020 Society of Chemical Industry (SCI)
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