Invisible threats from typical endocrine disrupting compounds in estuarine environments caused by continuing seawater incursion: In-situ evidence of bio-geochemical processes captured by diffusive gradients in thin films

IF 12.4 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Water Research Pub Date : 2025-04-06 DOI:10.1016/j.watres.2025.123605

Linzhu Du , Wei Guo , Dongyue Li , Martin R. Tillotson , Yuhan Zhu , Junhui Yue , Jun Li , Shouliang Huo , Yue Gao , Xu Zhao

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Abstract

Continued seawater incursion significantly affects the fate of pollutants in coastal estuaries, yet understanding of the in-situ behavior of endocrine-disrupting compounds (EDCs) in these areas remains limited. The distribution, transport and microbial response of two model EDCs, bisphenol A (BPA) and nonylphenol (NP), in three estuarine zones of slight (SZ), moderate (MZ) and complete (CZ) seawater incursion were investigated in-situ. Results showed seawater incursion reshaped the environmental gradients of the coastal estuaries on a spatial scale. Varying salinity gradient and tidal hydrodynamic conditions altered the dependence of EDCs on organic carbon, and promoted the release of accumulated EDCs from estuarine sediments resulting in the lowest residues of BPA (2.74 ± 0.76 μg/kg) and NP (10.25 ± 5.86 μg/kg) in the MZ. The resupply potential of BPA (R = 0.171 ± 0.058) and NP (R = 0.107 ± 0.015) from sediment to porewater was significantly higher in the SZ than in other zones (p < 0.001), due to both higher contaminant accumulation in this zone and inhibited resupply in MZ and CZ caused by seawater incursion. Furthermore, seawater incursion significantly reduced the microbial community diversity in the CZ (p < 0.001), being dominated by Vibrio (67.00 ± 1.13 %), and accordingly weakened the ability to transform organic matter in this region. Based on predicted sea level rise and the transport characteristics of EDCs under increased seawater incursion, it is estimated that the cumulative additional release of BPA and NP in the estuary will reach 1.8 and 1.5 tons by 2100, respectively. In order to mitigate the risk of additional estuarine EDCs release due to seawater incursion, increasing vegetation cover, strict monitoring, and climate policy interventions may be effective strategies.

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持续海水入侵引起的河口环境中典型内分泌干扰化合物的无形威胁：薄膜中扩散梯度捕获的生物地球化学过程的原位证据

持续的海水入侵显著影响了沿海河口污染物的命运，但对这些地区内分泌干扰化合物（EDCs）的原位行为的了解仍然有限。研究了双酚A （BPA）和壬基酚（NP）两种模式EDCs在轻度（SZ）、中度（MZ）和完全（CZ）海水入侵3个河口带的分布、迁移和微生物响应。结果表明，海水入侵在空间尺度上重塑了沿海河口的环境梯度。不同的盐度梯度和潮汐水动力条件改变了EDCs对有机碳的依赖，促进了河口沉积物中EDCs的释放，导致MZ内BPA（2.74±0.76 μg/kg）和NP（10.25±5.86 μg/kg）的残留量最低。BPA （R = 0.171±0.058）和NP （R = 0.107±0.015）从沉积物到孔隙水的再补给潜力在SZ区显著高于其他区域（p<0.001），这是由于SZ区污染物积累较高，以及海水入侵抑制了MZ和CZ区的再补给。此外，海水入侵显著降低了CZ的微生物群落多样性（p<0.001），以弧菌为主（67.00±1.13%），从而削弱了该地区有机质转化能力。根据预测的海平面上升和海水入侵增加下EDCs的输运特征，预计到2100年，BPA和NP在河口的累积额外释放量将分别达到1.8和1.5吨。为了减轻海水入侵导致的额外河口EDCs释放的风险，增加植被覆盖、严格监测和气候政策干预可能是有效的策略。

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来源期刊

Water Research 环境科学-工程：环境

CiteScore

20.80

自引率

9.40%

发文量

1307

审稿时长

38 days

期刊介绍： Water Research, along with its open access companion journal Water Research X, serves as a platform for publishing original research papers covering various aspects of the science and technology related to the anthropogenic water cycle, water quality, and its management worldwide. The audience targeted by the journal comprises biologists, chemical engineers, chemists, civil engineers, environmental engineers, limnologists, and microbiologists. The scope of the journal include: •Treatment processes for water and wastewaters (municipal, agricultural, industrial, and on-site treatment), including resource recovery and residuals management; •Urban hydrology including sewer systems, stormwater management, and green infrastructure; •Drinking water treatment and distribution; •Potable and non-potable water reuse; •Sanitation, public health, and risk assessment; •Anaerobic digestion, solid and hazardous waste management, including source characterization and the effects and control of leachates and gaseous emissions; •Contaminants (chemical, microbial, anthropogenic particles such as nanoparticles or microplastics) and related water quality sensing, monitoring, fate, and assessment; •Anthropogenic impacts on inland, tidal, coastal and urban waters, focusing on surface and ground waters, and point and non-point sources of pollution; •Environmental restoration, linked to surface water, groundwater and groundwater remediation; •Analysis of the interfaces between sediments and water, and between water and atmosphere, focusing specifically on anthropogenic impacts; •Mathematical modelling, systems analysis, machine learning, and beneficial use of big data related to the anthropogenic water cycle; •Socio-economic, policy, and regulations studies.