1355 Ecotoxicological assessment of recycled aggregate and concrete via aquatic biotests

Authors

  • Klára Anna Mocová University of Chemistry and Technology Prague, Faculty of Environmental Technology, Department of Environmental Chemistry, Technická 5, 166 28 Prague 6, Czech Republic https://orcid.org/0000-0002-6832-682X
  • Hedvika Roztočilová University of Chemistry and Technology Prague, Faculty of Environmental Technology, Department of Environmental Chemistry, Technická 5, 166 28 Prague 6, Czech Republic https://orcid.org/0000-0002-8198-4894
  • Diana Mariaková Czech Technical University in Prague, University Centre for Energy Efficient Buildings, Třinecká 1024, 273 43 Buštěhrad, Czech Republic https://orcid.org/0000-0003-0181-9248

Keywords:

recycled aggregate, micronized recycled concrete, construction and demolition waste (CDW), leachate, ecotoxicity

Abstract

With the growing consumption of primary raw materials, the need for recycling of construction and demolition waste (CDW) arises. According to international and national regulations, any waste must be tested for ecotoxicity using a leaching test followed by chemical analysis and a set of aquatic toxicity biotests. Standardized leaching procedures have also been developed for construction materials and products and are used in common practice. On the other hand, studies aimed at direct determination of ecotoxicity are still lacking. Acute toxicity tests with unicellular algae, freshwater crustaceans, and marine bacteria are among the most popular for determining the ecotoxicological potential of recycled aggregates or concrete samples. The article deals with the perspective of semichronic and chronic tests with extended exposure, as well as testing of leachates obtained from leaching events for more than 24 hours. Results of performed experiments were compared and evaluated. From the point of view of sustainability, it is necessary to develop an optimal experimental design for the ecotoxicological evaluation of recycled aggregate and concrete. The conclusion of the paper is the evaluation of possible methods and their combinations.

Downloads

Download data is not yet available.

Published

2022-12-21

How to Cite

Mocová, K. A., Roztočilová, H., & Mariaková, D. (2022). 1355 Ecotoxicological assessment of recycled aggregate and concrete via aquatic biotests. Acta Polytechnica CTU Proceedings, 38. Retrieved from https://ojs.cvut.cz/ojs/index.php/APP/article/view/8257