Removal of Cadmium ions from aqueous solutions by microorganisms of activated sludge

In this study, the utilization of dried activated sludge for removal of Cd2+ from aqueous solution in a batch system was investigated. Initial pH, biosorbent dosage, contact time, and initial metal concentration parameters were selected to determine optimal process conditions. The bi-osorption mechanism was examined by SEM, FTIR and EDX results. The optimum conditions for Cd2+ biosorption were found to be 6.0, 120 min., 1.2 g. L-1 and 80 mg. L-1, respectively for initial pH, contact time, biosorbent dosage and initial Cd2+ concentration. Langmuir and Freundlich isotherms were used to model the biosorption equilibrium data, and it was determined that the system followed the Langmuir isotherm, and the sorption capacity of the biosorbent was found to be 15.43 mg.g-1. Biosorption followed a pseudo-second-order rate model. Two main mechanisms of Cd2+ biosorption onto the dried activated sludge were adsorption to the C-H bonds and ion exchange with Na+, K+ and Ca2+ ions.

Dergi Adı Fresenius Environmental Bulletin
Dergi Cilt Bilgisi 24
Dergi Sayısı 1B
Sayfalar 302 - 310
Yayın Yılı 2015
Eser Adı
[dc.title]
Removal of Cadmium ions from aqueous solutions by microorganisms of activated sludge
Yazar
[dc.contributor.author]
Altın, Süreyya
Yazar
[dc.contributor.author]
Altın, Ahmet
Yazar
[dc.contributor.author]
Kahraman, Bekir Fatih
Yazar
[dc.contributor.author]
Alemdar, Sonay
Yazar
[dc.contributor.author]
Alaydın, Elif
Yayın Yılı
[dc.date.issued]
2015
Yayıncı
[dc.publisher]
Parlar Scientific Publications
Yayın Türü
[dc.type]
article
Özet
[dc.description.abstract]
In this study, the utilization of dried activated sludge for removal of Cd2+ from aqueous solution in a batch system was investigated. Initial pH, biosorbent dosage, contact time, and initial metal concentration parameters were selected to determine optimal process conditions. The bi-osorption mechanism was examined by SEM, FTIR and EDX results. The optimum conditions for Cd2+ biosorption were found to be 6.0, 120 min., 1.2 g. L-1 and 80 mg. L-1, respectively for initial pH, contact time, biosorbent dosage and initial Cd2+ concentration. Langmuir and Freundlich isotherms were used to model the biosorption equilibrium data, and it was determined that the system followed the Langmuir isotherm, and the sorption capacity of the biosorbent was found to be 15.43 mg.g-1. Biosorption followed a pseudo-second-order rate model. Two main mechanisms of Cd2+ biosorption onto the dried activated sludge were adsorption to the C-H bonds and ion exchange with Na+, K+ and Ca2+ ions.
Kayıt Giriş Tarihi
[dc.date.accessioned]
2019-12-23
Açık Erişim Tarihi
[dc.date.available]
2019-12-23
Yayın Dili
[dc.language.iso]
eng
Konu Başlıkları
[dc.subject]
Adsorption kinetics
Konu Başlıkları
[dc.subject]
Biosorption
Konu Başlıkları
[dc.subject]
Cadmium removal
Haklar
[dc.rights]
info:eu-repo/semantics/openAccess
ISSN
[dc.identifier.issn]
1018-4619
İlk Sayfa Sayısı
[dc.identifier.startpage]
302
Son Sayfa Sayısı
[dc.identifier.endpage]
310
Dergi Adı
[dc.relation.journal]
Fresenius Environmental Bulletin
Dergi Sayısı
[dc.identifier.issue]
1B
Dergi Cilt Bilgisi
[dc.identifier.volume]
24
Tek Biçim Adres
[dc.identifier.uri]
https://hdl.handle.net/20.500.12628/7384
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Görüntülenme
46
09.12.2022 tarihinden bu yana
İndirme
1
09.12.2022 tarihinden bu yana
Son Erişim Tarihi
07 Nisan 2024 18:44
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biosorption initial biosorbent contact Langmuir conditions followed dosage concentration system sludge activated determined equilibrium sorption isotherms Freundlich isotherm capacity exchange mechanisms adsorption pseudo-second-order Biosorption optimum respectively determine selected parameters Initial investigated process solution aqueous removal
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