6533b7defe1ef96bd1276903

RESEARCH PRODUCT

Behaviour of EDTA in marine microcosms

Janne VirtapohjaRaimo Alén

subject

Environmental EngineeringHealth Toxicology and MutagenesisPublic Health Environmental and Occupational HealthEnvironmental engineeringSedimentEthylenediaminetetraacetic acidGeneral MedicineGeneral ChemistryBiodegradationPollutionchemistry.chemical_compoundchemistryEnvironmental chemistryEnvironmental ChemistryDegradation (geology)SeawaterChelationWater pollutionMicrocosm

description

Laboratory-scale microcosm tests were carried out in sea water with and without sediment to investigate the importance of ultraviolet (UV) light and microbes in the temperature-dependent degradation of metal complexes of ethylenediaminetetraacetic acid (EDTA). After 17 weeks, 44% and 48% of the original EDTA (initial concentration 385 microg/L) were converted at 10 degrees C and 22 degrees C, respectively. The degradation was more influenced by UV light than by sediment microbes, although the latter were very important. At both temperatures, absorption of EDTA to the sediment phase reached a maximum in the initial stage of the experiments (4 weeks): at 10 degrees C about 4% and at 22 degrees C about 7% of the original EDTA.

yearjournalcountryeditionlanguage
2000-07-21Chemosphere
https://doi.org/10.1016/s0045-6535(98)00170-2