Removal of dissolved metals by activated carbon from road runoff in batch systems – equilibrium and kinetic

• Autorzy: Pawluk K. , Fronczyk J.

Warianty tytułu

PL

Usuwanie metali ciężkich na węglu aktywowanym - sorpcja równowagowa i kinetyczna

• Języki publikacji: EN

Abstrakty

EN

Activated carbon is an effective sorbent for removing organic and inorganic contaminants from aqueous solutions. In conducted experiments, granulated activated carbon (GAC) was used to examine the adsorption processes of heavy metals (Cd, Cu, Ni, Pb and Zn). Studies (performed in batch system) were carried out as a function of time, heavy metals concentration and pH values. The obtained results show that GAC effectively removes mentioned metals. Numerous kinetic models were used to investigate the mechanism of adsorption processes. Using the Langmuir isotherm, the maximum adsorption capacities were calculated to be 3.010, 3.662, 4.430, 3.800 and 4.169 mg·g–1 for Cd, Cu, Ni, Pb and Zn, respectively, in neutral conditions and 2.684, 2.578, 3.482, 2.592 and 2.253 mg·g -1 in acidic conditions.

PL

Węgiel aktywny jest skutecznym sorbentem powszechnie wykorzystywanym do usuwania zanieczyszczeń organicznych i nieorganicznych z roztworów wodnych. W przeprowadzonych doświadczeniach, granulowany węgiel aktywny (GAC) użyto do badania procesów adsorpcji metali ciężkich (Cd, Cu, Ni, Pb i Zn). Badania (typu batch test) przeprowadzono w funkcji czasu, stężenia metali ciężkich i wartości pH. Otrzymane wyniki wskazują na skuteczne usuwanie wyżej wymienionych metali ciężkich z roztworów wodnych. Podczas badań mechanizmu procesów adsorpcyjnych wykorzystano następujące modele kinetyczne: pseudopierwszego, pseudodrugiego rzędu oraz model wewnątrzcząsteczkowy. Ponadto, wyniki otrzymane z badań sorpcji równowagowej zostały opisane następującymi modelami: Langmuira, Redlicha-Petersona i Temkina. Wykorzystując parametry izotermy Langmuira, obliczono wartości maksymalnych zdolności adsorpcji dla metali ciężkich, które wyniosły dla warunków odczynu obojętnego: Cd –3,010, Cu –3,662, Ni –4,430, Pb –3,800 i Zn –4,169 mg·g–1, i dla warunków odczynu kwaśnego: Cd –2,684, Cu –2,578, Ni –3,482, Pb –2,592 i Zn –2,253 mg·g-1.

Słowa kluczowe

EN

metal pollutant; heavy metal; pollutant removal; sorbent; carbon sorbent; activated carbon; equilibrium; kinetics; sorption; adsorption; road run-off water

• Wydawca: -
• Czasopismo: Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
• Rocznik: 2015
• Tom: 47
• Numer: 1
• Opis fizyczny: p.31-42,fig.,ref.

Twórcy

autor

Pawluk K.

• Department of Geotechnical Engineering, Warsaw University of Life Sciences – SGGW, Nowoursynowska159, 02-776 Warsaw, Poland

autor

Fronczyk J.

• Department of Geotechnical Engineering, Warsaw University of Life Sciences – SGGW, Nowoursynowska159, 02-776 Warsaw, Poland

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Identyfikatory

DOI

10.1515/sggw-2015-0003