Publication detail

Evaluation of the hazardous impact of landfill leachates by toxicity and biodegradability tests

VÁVROVÁ, M. KALČÍKOVÁ, G.

Original Title

Type

journal article in Web of Science

Language

English

Original Abstract

The aim of our research was to assess the ecotoxicity and biodegradability of leachates originating from two parts of a municipal landfill before and after biological treatment in the existing treatment plant. Biotests represent important tools for adequate environmental characterization of landfill leachates and could be helpful in reliable assessment and monitoring of the treatment plant efficiency. For ecotoxicity testing of landfill leachate before and after biological treatment, different organisms were chosen: the bacteria Vibrio fischeri, a mixed culture of activated sludge, duckweed Lemna minor, white mustard Sinapis alba, brine shrimp Artemia salina, and water flea Daphnia magna. For assessment of biodegradability, the method for determination of oxygen demand in a closed respirometer was used. The investigated leachates were heavily polluted, and in some cases, effluent limits were exceeded even after treatment. Results indicated that toxicity tests and physico-chemical parameters determined before and after treatment equivalently assess the efficiency of the existing treatment plant. However, the investigated leachates showed higher toxicity to Daphnia magna and especially to Lemna minor in contrast to Vibrio fischeri and Artemia salina ( neither was sensitive to any of the leachates). No leachates were readily biodegradable. Experiments confirmed that the battery of toxicity tests should be applied for more comprehensive assessment of landfill leachate treatment and for reliable assessment of the treated leachate's subsequent environmental impact. It was confirmed that treated leachate, in spite of its better physico-chemical characteristics, still represents a potential environmental risk and thus should not be released into the environment.

Keywords

biodegradability tests; ecotoxicity tests; landfill leachate; toxicity; treatment

Authors

VÁVROVÁ, M.; KALČÍKOVÁ, G.

RIV year

2011

Released

1. 10. 2011

Publisher

TAYLOR & FRANCIS LTD, 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND

Location

Spojené království Velké Británie a Severního Irska

ISBN

0959-3330

Periodical

ENVIRONMENTAL TECHNOLOGY

Year of study

Number

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1345

Pages to

1353

Pages count

BibTex

@article{BUT89959,
  author="Milada {Vávrová} and Gabriela {Kalčíková}",
  title="Evaluation of the hazardous impact of landfill leachates by toxicity and biodegradability tests",
  journal="ENVIRONMENTAL TECHNOLOGY",
  year="2011",
  volume="32",
  number="12",
  pages="1345--1353",
  issn="0959-3330"
}