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Spatial distribution of legacy pesticides in river sediment from the Republic of Moldova

Ivanova, Anastasia and Wiberg, Karin and Ahrens, Lutz and Zubcov, Elena and Dahlberg, Anna-Karin (2021). Spatial distribution of legacy pesticides in river sediment from the Republic of Moldova. Chemosphere. 279 , 130923
[Research article]

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Abstract

Historical use of organochlorine pesticides (OCPs) in the Republic of Moldova could pose a potential risk for the aquatic environment due to the persistence, bioaccumulation and toxic properties of these environmental pollutants. However, knowledge on environmental concentrations of legacy OCPs in Moldova is limited. In this study, surface sediment from the two main rivers; Dniester (8 sites, n = 15) and Prut (6 sites, n = 12), and two tributary rivers; Bic (11 sites, n = 11) and Raut (6 sites, n = 6), were collected during 2017-2018 and analyzed for hexachlorocyclohexanes (HCHs), dichlorodiphenyltrichloroethanes (DDTs) and their transformation products (DDDs and DDEs) using gas chromatography coupled to mass spectrometry (GC-MS/MS). Sediment concentrations of Sigma 6DDX (1.9-140 ng g(-1) dry weight (dw)) and Sigma(4)HCHs (n.d-2.5 ng g(-1) dw) were found. In the big rivers, the average Sigma 6DDX concentration (18 ng g(-1) dw) were 35 times higher than Sigma(4)HCHs (0.51 ng g(-1) dw). Whereas, in the small rivers the average Sigma 6DDX concentration (32 ng g(-1) dw) was approximately 41 times higher than Sigma(4)HCHs (0.77 ng g(-1) dw). Compared to previous studies from Eastern Europe, the sediment levels were generally similar as found in Moldova's neighboring countries (Romania and Ukraine). Overall, the contamination profile indicates long-term ageing of OCPs used in the past in the agricultural sector. Less than half of the sites (45%) had levels that pose a potential risk for benthic organisms. Hence, further work is needed to determine the bioaccumulation of OCPs in the aquatic food web in this region and the associated risks to ecosystems and human health.

Authors/Creators:Ivanova, Anastasia and Wiberg, Karin and Ahrens, Lutz and Zubcov, Elena and Dahlberg, Anna-Karin
Title:Spatial distribution of legacy pesticides in river sediment from the Republic of Moldova
Series Name/Journal:Chemosphere
Year of publishing :2021
Volume:279
Article number:130923
Number of Pages:9
Publisher:PERGAMON-ELSEVIER SCIENCE LTD
ISSN:0045-6535
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
Keywords:Aquatic environment, Persistent organic pollutants, DDT, HCH, Eastern Europe
URN:NBN:urn:nbn:se:slu:epsilon-p-112667
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-112667
Additional ID:
Type of IDID
DOI10.1016/j.chemosphere.2021.130923
Web of Science (WoS)000659971200139
ID Code:24810
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:07 Jul 2021 07:25
Metadata Last Modified:07 Jul 2021 07:31

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