Metal removal by bed filter materials used in domestic wastewater treatment
2009 (English)In: Journal of Hazardous Materials, ISSN 0304-3894, E-ISSN 1873-3336, Vol. 166, no 2-3, 734-739 p.Article in journal (Refereed) Published
Bed filters using reactive materials are an emerging technology for on-site wastewater treatment. Used materials, which are enriched with phosphorus, can be used as a fertiliser or soil amendment. However the materials can also be enriched with metals from the wastewater. Six materials (opoka, sand, Polonite (R), limestone, two types of blast furnace slag) exposed to long-term wastewater loading in columns and in a compact filter well filled with Polonite were investigated for metal removal and accumulation. Wastewater applied to the columns had low heavy metal concentrations in the order Zn > Cu > Mn > Ni > Cr. All columns were able to remove 53%-83% of Zn except those filled with sand. Polonite demonstrated a high removal capacity of Mn (>98%), while only the slag materials were able to remove Ni. All materials showed increased Cu, Cr(III). Mn. Pb and Zn content after filtration. Speciation calculations showed that high concentrations of dissolved organic matter might have prevented efficient metal removal, particularly in the case of Cu. The low content of toxic heavy metals in the studied filter materials studied would probably not restrict their use as a fertiliser or soil amendment.
Place, publisher, year, edition, pages
2009. Vol. 166, no 2-3, 734-739 p.
Column experiment, Contamination, Blast furnace slag, Soil amendment, Polonite (R), blast-furnace slag, phosphorus retention, heavy-metals, sorption, ions, zinc, fertilizer, sorbents, wetlands, calcite
Other Environmental Engineering
IdentifiersURN: urn:nbn:se:kth:diva-18512DOI: 10.1016/j.jhazmat.2008.11.127ISI: 000266947000021ScopusID: 2-s2.0-67349231917OAI: oai:DiVA.org:kth-18512DiVA: diva2:336559
QC 201005252010-08-052010-08-052011-01-18Bibliographically approved