
Martijn van Praagh
Adjungerad universitetslektor

Leaching of chloride, sulphate, heavy metals, dissolved organic carbon and phenolic organic pesticides from contaminated concrete
Författare
Summary, in English
Concrete samples from demolition waste of a former pesticide plant in Sweden were analysed for total contents and leachate concentrations of potentially hazardous inorganic substances, TOC, phenols, as well as for pesticide compounds such as phenoxy acids, chlorophenols and chlorocresols. Leachates were produced by means of modified standard column leaching tests and pH-stat batch tests. Due to elevated contents of chromium and lead, as well as due to high chloride concentrations in the first leachate from column tests at L/S 0.1, recycling of the concrete as a construction material in groundworks is likely to be restricted according to Swedish guidelines. The studied pesticide compounds appear to be relatively mobile at the materials own pH. > 12, 12, 9 and 7. Potential leaching of pesticide residues from recycled concrete to ground water and surface water might exceed water quality guidelines for the remediation site and the EU Water Framework Directive. Results of this study stress the necessity to systematically study the mechanism behind mobility of organic contaminants from alkaline construction and demolition wastes rather than rely on total content limit values.
Avdelning/ar
- Centrum för miljö- och klimatvetenskap (CEC)
Publiceringsår
2016-10
Språk
Engelska
Sidor
352-358
Publikation/Tidskrift/Serie
Waste Management: international journal of integrated waste management, science and technology
Volym
56
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Environmental Sciences
Nyckelord
- C&D waste
- Concrete
- Leaching
- Pesticides
- Recycling
- Solid waste
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0956-053X