Removal of Pb2+ ions from aqueous medium by using chitosan-diatomite composite: equilibrium, kinetic and thermodynamic studies
In this study, a novel, low-cost, natural, and highly effective adsorbent, chitosan (Ch) -diatomite (D) composite was synthesized. Ch-D composite was tested as an effective and alternative adsorbent for the removal of Pb2+ ions. The Ch-D composite was characterized by FT-IR, SEM-EDX and PZC analyses...
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| Format: | Article |
| Language: | English |
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Turkish Chemical Society
2020-02-01
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| Series: | Journal of the Turkish Chemical Society, Section A: Chemistry |
| Subjects: | |
| Online Access: | https://dergipark.org.tr/en/pub/jotcsa/issue/49279/634590 |
| _version_ | 1797914890422190080 |
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| author | Zeynep Mine ŞENOL Selçuk ŞİMŞEK |
| author_facet | Zeynep Mine ŞENOL Selçuk ŞİMŞEK |
| author_sort | Zeynep Mine ŞENOL |
| collection | DOAJ |
| description | In this study, a novel, low-cost, natural, and highly effective adsorbent, chitosan (Ch) -diatomite (D) composite was synthesized. Ch-D composite was tested as an effective and alternative adsorbent for the removal of Pb2+ ions. The Ch-D composite was characterized by FT-IR, SEM-EDX and PZC analyses. The adsorption process of Pb2+ ions onto Ch-D as initial lead concentration, solution pH, temperature, contact time and recovery was investigated. From the adsorption process results, it has been observed that the highest removal efficiency is approximately 95% at a contact time of 4-hour, initial Pb2+ concentration of 500 mg L-1 and agitation speed of 150 rpm at natural pH 4.0. The maximum Pb2+ adsorption capacity from the Langmuir model was found as 0.154 mol kg-1 at 25 oC. Besides, adsorption kinetics was also explained with pseudo-first-order models. Adsorption thermodynamics have shown that Pb2+ adsorption onto Ch-D is possible, spontaneous and exothermic. Ch-D composite can become an alternative adsorbent for the treatment of lead ions in the wastewater. |
| first_indexed | 2024-04-10T12:34:16Z |
| format | Article |
| id | doaj.art-89a1acd6435d4d6094983fa2fe3f41c7 |
| institution | Directory Open Access Journal |
| issn | 2149-0120 |
| language | English |
| last_indexed | 2024-04-10T12:34:16Z |
| publishDate | 2020-02-01 |
| publisher | Turkish Chemical Society |
| record_format | Article |
| series | Journal of the Turkish Chemical Society, Section A: Chemistry |
| spelling | doaj.art-89a1acd6435d4d6094983fa2fe3f41c72023-02-15T16:14:46ZengTurkish Chemical SocietyJournal of the Turkish Chemical Society, Section A: Chemistry2149-01202020-02-0171307318https://doi.org/10.18596/jotcsa.634590Removal of Pb2+ ions from aqueous medium by using chitosan-diatomite composite: equilibrium, kinetic and thermodynamic studiesZeynep Mine ŞENOL0https://orcid.org/0000-0002-5250-1267Selçuk ŞİMŞEK1https://orcid.org/0000-0001-5755-0335SİVAS CUMHURİYET ÜNİVERSİTESİ, TÜRKİYESİVAS CUMHURİYET ÜNİVERSİTESİ, TÜRKİYEIn this study, a novel, low-cost, natural, and highly effective adsorbent, chitosan (Ch) -diatomite (D) composite was synthesized. Ch-D composite was tested as an effective and alternative adsorbent for the removal of Pb2+ ions. The Ch-D composite was characterized by FT-IR, SEM-EDX and PZC analyses. The adsorption process of Pb2+ ions onto Ch-D as initial lead concentration, solution pH, temperature, contact time and recovery was investigated. From the adsorption process results, it has been observed that the highest removal efficiency is approximately 95% at a contact time of 4-hour, initial Pb2+ concentration of 500 mg L-1 and agitation speed of 150 rpm at natural pH 4.0. The maximum Pb2+ adsorption capacity from the Langmuir model was found as 0.154 mol kg-1 at 25 oC. Besides, adsorption kinetics was also explained with pseudo-first-order models. Adsorption thermodynamics have shown that Pb2+ adsorption onto Ch-D is possible, spontaneous and exothermic. Ch-D composite can become an alternative adsorbent for the treatment of lead ions in the wastewater.https://dergipark.org.tr/en/pub/jotcsa/issue/49279/634590diatomitechitosancompositeadsorptionlead |
| spellingShingle | Zeynep Mine ŞENOL Selçuk ŞİMŞEK Removal of Pb2+ ions from aqueous medium by using chitosan-diatomite composite: equilibrium, kinetic and thermodynamic studies Journal of the Turkish Chemical Society, Section A: Chemistry diatomite chitosan composite adsorption lead |
| title | Removal of Pb2+ ions from aqueous medium by using chitosan-diatomite composite: equilibrium, kinetic and thermodynamic studies |
| title_full | Removal of Pb2+ ions from aqueous medium by using chitosan-diatomite composite: equilibrium, kinetic and thermodynamic studies |
| title_fullStr | Removal of Pb2+ ions from aqueous medium by using chitosan-diatomite composite: equilibrium, kinetic and thermodynamic studies |
| title_full_unstemmed | Removal of Pb2+ ions from aqueous medium by using chitosan-diatomite composite: equilibrium, kinetic and thermodynamic studies |
| title_short | Removal of Pb2+ ions from aqueous medium by using chitosan-diatomite composite: equilibrium, kinetic and thermodynamic studies |
| title_sort | removal of pb2 ions from aqueous medium by using chitosan diatomite composite equilibrium kinetic and thermodynamic studies |
| topic | diatomite chitosan composite adsorption lead |
| url | https://dergipark.org.tr/en/pub/jotcsa/issue/49279/634590 |
| work_keys_str_mv | AT zeynepminesenol removalofpb2ionsfromaqueousmediumbyusingchitosandiatomitecompositeequilibriumkineticandthermodynamicstudies AT selcuksimsek removalofpb2ionsfromaqueousmediumbyusingchitosandiatomitecompositeequilibriumkineticandthermodynamicstudies |