Source, fate and budget of Dechlorane Plus (DP) in a typical semi-closed sea, China. (15th January 2021)

• Record Type: Journal Article
• Authors: Zhen, Xiaomei; Li, Yanfang; Wang, Xinming; Liu, Lin; Li, Yanan; Tian, Chongguo; Pan, Xiaohui; Fang, Yin; Tang, Jianhui
• Is Part Of: Environmental pollution. Volume 269(2021)
• Publication Date: 2021-01-15
• Subjects: Dechlorane plus -- DP -- Bohai sea -- Budget -- Multi-box mass balance; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2020.116214
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract : Dechlorane Plus (DP), which has severe effects on marine ecosystems, has been proposed for listing under the Stockholm Convention as a persistent organic pollutant (POPs). This study was the first comprehensive investigation of the concentration and fate of DP in the Bohai Sea (BS) based on determination of river estuary water, river estuary sediment, surface seawater, bottom seawater, and sea sediments samples. The highest water DP levels were found in river estuary in Tianjin in North China due to the huge usage of DP in recent years, and spatial distribution analysis indicates it was mainly affected by regional high urbanization and emission of E-waste. The spatial distribution of DP in the BS was mainly affected by a combination of coastal hydrodynamics and land anthropogenic activities. On the basis of multi-box mass balance, simulations of DP in seawater showed an increase from 2014 to 2025, before leveling off at 184 pg L −1 by a constant DP input to the BS. Riverine discharge almost contributed to the total input (∼99%) and dominated the DP levels in the BS. Degradation of DP accounted for 55.3% and 78.1% of total DP output in seawater and sediment, respectively, indicating that degradation mainly affected decline of DP in the environment. Graphical abstract: Image 1 Highlights: Distribution, fate and budget of DP were investigated in the BS. High DP levels were found in rivers, whereas quite low levels found in the BS. Anthropogenic activities were responsible for the high DP levels in the rivers. Riverine discharge dominated the DP levels in the BS. Degradation was a major sink of DP in water and sediment in the BS. Abstract : This study conducted the first overview of DP source, fate, and budget in the BS, and a box model was used to apportion DP sinks.