Cadmium complexation by solid waste leachates

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A previously reported method for determination of Cd species in solid waste leachates has been applied to ten leachate samples representing five different types of solid waste: refuse compost, flyash from coal combustion, sewage sludge, refuse incineration residues and landfilled municipal waste. The leachates were spiked with Cd (<100 μg Cd 1−1) to obtain comparable concentrations in the investigated samples. For each sample, at two different Cd concentrations, free divalent Cd and complexed Cd were determined. Furthermore, the complexed fraction was operationally separated into labile complexes, slowly labile complexes and stable complexes. Leachates originating from the same type of solid waste showed different fractions of Cd, in particular with respect to free divalent Cd and stable Cd complexes. Only coal flyash showed almost identical fractions of Cd in the two leachates. The latter is due to the predominant hydroxy complex formation. In all leachates, the labile and slowly labile Cd complexes were predominant, accounting for a total of 69–100% of the leachate Cd concentrations. The fractions of free divalent Cd and stable Cd complexes varied highly,
Original languageEnglish
JournalWater Research
Volume23
Issue number1
Pages (from-to)81-84
ISSN0043-1354
Publication statusPublished - 1989

Fingerprint

Dive into the research topics of 'Cadmium complexation by solid waste leachates'. Together they form a unique fingerprint.

Cite this