Advanced

Leaching of chloride, sulphate, heavy metals, dissolved organic carbon and phenolic organic pesticides from contaminated concrete

Van Praagh, M. LU and Modin, H. LU (2016) In Waste Management 56. p.352-358
Abstract

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... (More)

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.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
C&D waste, Concrete, Leaching, Pesticides, Recycling, Solid waste
in
Waste Management
volume
56
pages
7 pages
publisher
Elsevier
external identifiers
  • scopus:84978804642
  • wos:000383827700039
ISSN
0956-053X
DOI
10.1016/j.wasman.2016.07.009
language
English
LU publication?
yes
id
b569d2b8-540c-479a-a661-fc1880b72de0
date added to LUP
2017-02-08 16:18:46
date last changed
2017-09-18 11:37:39
@article{b569d2b8-540c-479a-a661-fc1880b72de0,
  abstract     = {<p>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. &gt; 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.</p>},
  author       = {Van Praagh, M. and Modin, H.},
  issn         = {0956-053X},
  keyword      = {C&D waste,Concrete,Leaching,Pesticides,Recycling,Solid waste},
  language     = {eng},
  pages        = {352--358},
  publisher    = {Elsevier},
  series       = {Waste Management},
  title        = {Leaching of chloride, sulphate, heavy metals, dissolved organic carbon and phenolic organic pesticides from contaminated concrete},
  url          = {http://dx.doi.org/10.1016/j.wasman.2016.07.009},
  volume       = {56},
  year         = {2016},
}