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Explanation of difenoconazole removal by chitosan with Langmuir adsorption isotherm and kinetic modeling

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dc.contributor.authorAltun, Şükran
dc.contributor.authorKadak, Ali Eslem
dc.contributor.authorKüçükgülmez, Aygül
dc.contributor.authorGülnaz, Osman
dc.contributor.authorÇelik, Mehmet
dc.date.accessioned2026-01-04T17:24:00Z
dc.date.issued2022-10-31
dc.description.abstractIn this study, the adsorption of toxic difenoconazole pesticide was investigated by using chitosan. In the first phase of the study, chitosan was extracted from deep-water pink shrimp (Parapenaeus longirostris) shells, by deacetylation of the chitin, which is separated and disposed of after meat extraction in processing facilities in Turkey. The deacetylation degree, molecular weight, viscosity, moisture, and crude-ash values of the extracted chitosan were determined. Chitosan, having a high deacetylation degree (90.21%), was used as the adsorbent. In the second phase of the study, the effects of pH, temperature, and pesticide concentration on the adsorption were investigated. The optimum pH level for pesticide adsorption was determined as 5. It was observed that the adsorption increases as the temperature increases. A rapid increase was observed within the first 5 min of the 60-minute adsorption process in difenoconazole concentrations of 5, 15, and 25 µg/L, and after 10 min, the adsorption rate was stable. The Langmuir isotherm parameters regarding the adsorption were determined as aL = 0.635, kL = 15.10, and the Qmax value was calculated as 23.77 mg/g. In the evaluation of overall study results, it was determined that the chitosan biopolymer is a suitable adsorbent for difenoconazole pesticide adsorption.
dc.description.urihttps://doi.org/10.1007/s43188-022-00152-2
dc.description.urihttps://pubmed.ncbi.nlm.nih.gov/36726828
dc.identifier.doi10.1007/s43188-022-00152-2
dc.identifier.eissn2234-2753
dc.identifier.endpage133
dc.identifier.issn1976-8257
dc.identifier.openairedoi_dedup___::1b8a59aff5846099cce9fafaf6fce74b
dc.identifier.orcid0000-0002-7128-9134
dc.identifier.pubmed36726828
dc.identifier.scopus2-s2.0-85140965148
dc.identifier.startpage127
dc.identifier.urihttps://hdl.handle.net/20.500.12597/40097
dc.identifier.volume39
dc.identifier.wos000876832200001
dc.language.isoeng
dc.publisherSpringer Science and Business Media LLC
dc.relation.ispartofToxicological Research
dc.rightsCLOSED
dc.titleExplanation of difenoconazole removal by chitosan with Langmuir adsorption isotherm and kinetic modeling
dc.typeArticle
dspace.entity.typePublication
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