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Selection of adsorbents for treatment of leachate: batch studies of simultaneous adsorption of heavy metals
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2010 (English)In: Journal of Material Cycles and Waste Management, ISSN 1438-4957, E-ISSN 1611-8227, Vol. 12, no 1, p. 57-65Article in journal (Refereed) Published
Abstract [en]

The simultaneous adsorption of copper (Cu), cadmium (Cd), nickel (Ni), and lead (Pb) ions from spiked deionized water and spiked leachate onto natural materials (peat A and B), by-product or waste materials (carbon-containing ash, paper pellets, pine bark, and semi-coke), and synthetic materials (based on urea-formaldehyde resins, called blue and red adsorbents) or mixtures thereof was investigated. The adsorbents that gave the highest metal removal efficiencies were peat A, a mixture of peat B and carbon-containing ash, and a mixture of peat A and blue. At an initial concentration of 5 mg/l for each metal, the removal of each species of metal ion from spiked water and spiked leachate solutions was very good (> 90%) and good (> 75%), respectively. When the initial concentration of each metal in the solutions was twenty times higher (100 mg/l), there was a noticeable decrease in the removal efficiency of Cu2+, Cd2+, and Ni2+, but not of Pb2+. Langmuir monolayer adsorption capacities, q(m), on peat A were found to be 0.57, 0.37, and 0.36 mmol/g for Pb2+, Cd2+, and Ni2+, respectively. The order of metal adsorption capacity on peat A was the same in the case of competitive multimetal adsorption conditions as it was for single-element adsorption, namely Pb2+ > Cd2+ a parts per thousand yen Ni2+. The results show that peat alone (an inexpensive adsorbent) is a good adsorbent for heavy metal ions.

Place, publisher, year, edition, pages
2010. Vol. 12, no 1, p. 57-65
Keywords [en]
treatment of leachate, adsorption, heavy metals
National Category
Other Environmental Engineering
Research subject
Environmental Science, Environmental technology; Natural Science, Environmental Science
Identifiers
URN: urn:nbn:se:lnu:diva-7349DOI: 10.1007/s10163-009-0270-4OAI: oai:DiVA.org:lnu-7349DiVA, id: diva2:343881
Available from: 2010-08-16 Created: 2010-08-16 Last updated: 2017-12-12Bibliographically approved

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Hogland, William

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