MARINE POLLUTION BULLETIN
·
2024
·
IF 5.3
Peng Zhang,Yaqing Cui,Ren Shi,Jing Wang,Linke Ge,Qinglin Mu
This study investigated 17 organophosphate esters (OPEs) in the surface sediments of Hangzhou Bay and the East China Sea. The mean concentration of ∑OPEs in Hangzhou Bay (235.3 ng/g) was slightly lower than that in the East China Sea (273.5 ng/g), with detected analytes dominated by Diethyl phosphate, Tris(2-chloropropyl) phosphate, and Tris(1-chloro-2-propyl) phosphate. Based on principal component analysis and cluster analysis for the source apportionment of OPEs, the results indicated that the high levels of OPEs in the East China Sea close to Yangtze River estuary can be attributed to a significant large-scale OPEs production site located along the southern Yellow Sea and the western coast of the East China Sea. Furthermore, the risk assessment conducted on aquatic organisms indicated the non-ecological risk of OPEs. However, future research should focus on the potential composite impacts of OPEs on the water systems and human health.
研究领域:
环境科学
·
海洋学
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产品关联
DOI
PubMed
高影响因子
ACTA OCEANOLOGICA SINICA
·
2014
·Vol. 33
·期 9
·100-108
·
IF 0.684
Kang Xuming,Liu Sumei,Zhang Guoling
Cold diffusion methods are used to separate and quantify the three reduced inorganic sulfur species into acid volatile sulfide (AVS), pyrite-S and element sulfur (ES) in the sediments of the Yellow and East China Seas. The results show that up to 25.02 μmol/g of AVS, 113.1 μmol/g of pyrite-S and 44.4 μmol/g of ES are observed in the sediments of the Yellow Sea and East China Sea. Pyrite-S is the predominant sulfide mineral in the sediments, while the concentration of AVS is quite low at most stations in the study area. The amounts and reactivity of organic matter are the primary limited factor for the sulfide formation, while an iron limitation and a sulfate limitation are not observed in the sediments of the Yellow Sea and East China Sea. The irregular profiles of the three reduced inorganic sulfur species also reflected the comprehensive influence of sediment composition and sedimentation rates.
研究领域:
海洋学
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环境科学
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DOI
高影响因子
HARMFUL ALGAE
·
2024
·
IF 5.5
Xihua Cao,Mingjiao Wang,Fan Liu,Xiuxian Song,Zhiming Yu
Single source with series modifications (SSSM) is a new method to modify clay surfaces by activating clay mineral resources for harmful algal blooms control. In this study, the optimal preparation conditions for this method were obtained using response surface methodology. Based on the material analysis, an important way to obtain modified clay (MC) with the excellent Prorocentrum donghaiense removal performance was explored and the optimum preparation conditions were as follows: calcination temperature 750 °C, alkali neutralization pH 3.7 and clay supplementation ratio 1.3:1. Under these conditions, the calcination treatment can effectively activate the aluminum element in the clay lattice and obtain the largest amount of highly active Al IV and Al V , which are readily released from the lattice as activated aluminum. When the alkali neutralization pH was adjusted to 3.7, the activated aluminum was hydrolyzed and induced into highly positively charged polyhydroxyaluminum compounds. The supplemented kaolin increased the yield of the MC product by surface convergence of the activated aluminum in the system. As a result, the optimized MC can form large particle size flocs with good regeneration and stability during the algal removal process, which greatly improved its ability to coagulate and sediment algal cells. Overall, the MC prepared by the SSSM method achieved high algal removal efficiency through targeted element activation and functional group shaping.
研究领域:
环境科学
·
海洋生物学
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DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Li-Xin Kou,Xiao-Yu Zhang,Zi-Cen Zuo,Na Liu,Zhen He,Gui-Peng Yang
Polyhalogenated carbazoles (PHCZs), an emerging class of halogenated organic pollutants, have been widely detected in various environmental media, including sediments, soil, air, and organisms. The East China Sea (ECS) is a vital region for marine and fishery resource development in China, yet research on the pollution levels and sources of PHCZs in its sediments remains limited. This study reports the occurrence of seven PHCZs in the surface sediments of the ECS, with detection rates exceeding 90%. The concentrations of Σ 7 PHCZs ranged from 3.5 to 27 ng/g, with an average of 9.9 ng/g. The predominant congeners were 1368-BCZ and 3-ICZ. The sources of PHCZs included a non-specific source transported via terrestrial runoff (39%), industrial wastewater discharge (35%), and optoelectronic material pollution (26%), as identified by the positive matrix factorization model. The ecological risk assessment, based on TEQ, indicated a range of 0.18–5.0 pg TEQ/g across the study area. These findings highlight the potential ecological concerns associated with PHCZs in the ECS and emphasize the need for enhanced environmental monitoring and source mitigation efforts to reduce their potential environmental impacts.
研究领域:
环境科学
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海洋学
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2024
·
IF 8.1
Bin Li,Jianghong Shi,Xueling Xiang,Mengtao Zhang,Hui Ge,Shuhan Sun
Bromophenols has been proven to synthesize hydroxylated polybrominated diphenyl ethers (OH-PBDEs), which may pose additional environmental and health risks in the process of bioremediation. In this study, the removal of 2,4-dibromophenol (2,4-DBP) and 2,4,6-tribromophenol (2,4,6-TBP) and the biosynthetic of OH-PBDEs by Prorocentrum donghaiense were explored. The removal efficiencies of 2,4-DBP and 2,4,6-TBP ranged from 32.71% to 76.89% and 31.15%–78.12%, respectively. Low concentrations of 2,4-DBP stimulated algal growth , while high concentrations were inhibitory. Furthermore, exposure to 10.00 mg L −1 2,4-DBP resulted in the detection of 2′-hydroxy-2,3′,4,5′-tetrabromodiphenyl ether (2′–OH–BDE-68) within P . donghaiense . In contrast, increasing concentrations of 2,4,6-TBP considerably inhibited P . donghaiense growth, with 4′-hydroxy-2,3′,4,5′,6-pentabromodiphenyl ether (4′–OH–BDE-121) detected within P. donghaiense under 5.00 mg L −1 2,4,6-TBP. Metabolomic analysis further revealed that the synthesized OH-PBDEs exhibited higher toxicity than their precursors and identified the oxidative coupling as a key biosynthetic mechanism. These findings confirm the capacity of P. donghaiense to remove bromophenols and biosynthesize OH-PBDEs from bromophenols, offering valuable insights into formulating algal bioremediation to mitigate bromophenol contamination.
研究领域:
环境科学
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海洋生物学
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毒理学
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DOI
PubMed
高影响因子
MARINE POLLUTION BULLETIN
·
2022
·
IF 7.001
Kokoette Effiong,Jing Hu,Caicai Xu,Yiyi Zhang,Shumiao Yu,Tao Tang,Yuzhou Huang,Yongliang Lu,Wei Li,Jiangning Zeng,Xi Xiao
Harmful algal blooms (HABs) have induced severe damage worldwide. A novel high-efficient antialgal natural chemical, 3-indoleacrylic acid (3-IDC) with a 5-day half-maximal inhibitory concentration (IC 50, 5d ), was discovered from canola straw, and its algal inhibition mechanism was investigated. Adverse effects were observed on the growth of P. donghaiense with 3-IDC addition, following an increase in reactive oxygen species (ROS) production. 3-IDC also hindered the photosynthetic mechanism of P. donghaiense cells. Transcriptional results showed 3-IDC inhibiting the functions of all the nutrient assimilating genes, down-regulated ribulose-1,5-bisphosphate carboxylase/oxygenase II, and cytochrome f genes. The expression of heat shock protein ( HSP ) 70 and 90 and rhodopsin genes were also suppressed. The binding affinity of investigated receptors was observed. The conformational changes induced by the spatial microstructural alteration through 3-IDC may further contribute to the perturbation of those enzyme catalytic activities. The present results provide new insights on controlling HABs using 3-IDC.
研究领域:
环境科学
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海洋生物学
·
植物化学
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DOI
PubMed
高影响因子
MARINE POLLUTION BULLETIN
·
2025
·
IF 4.9
Shuai Sun,Xing Liu,Wenbin Yuan,Yun Luo,Xiumei Sun,Yanhui Ao,Lei Wang,Ningbo Geng
Benzotriazole ultraviolet absorbers (BUAs) are regarded as emerging contaminants due to their persistent, bioaccumulative, and toxic (PBT) or very persistent and very bioaccumulative (vPvB) properties, raising concerns about their presence in aquatic environments. This study explored BUAs in the northwest nearshore of the East China Sea, revealing their prevalent occurrence in both seawater and sediments. The total concentrations of eight BUAs ranged from 4.96 to 620 ng/L in seawater and from 7.41 to 131 ng/g dry weight in sediments. Their distribution between sediments and seawater was basically dependent on log K ow, though UV-P presented an unusual preference for sediment due to its lower steric hindrance. Environmental factors had limited effects on BUAs distribution, and their decreasing concentrations from nearshore to offshore indicate terrestrial inputs and coastal anthropogenic activities are the primary sources of marine BUAs. Results of the initial ecological risk assessment suggested the occurrence of BUAs may pose potential ecological risks to the local marine environments. This study provides an overview of BUAs spatial distribution in the northwest nearshore of the East China Sea, emphasizing the urgent need for toxicological studies to fully understand their potential risks and establish regulatory measures for mitigating coastal pollution.
研究领域:
环境科学
·
海洋环境学
·
污染物生态毒理学
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环境化学
·
近岸生态系统
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Guangming Lu,Shu Tian,Jingyu Li,Yongjian Xu,Shuan Liu,Jibin Pu
Antifouling coatings are crucial to protect marine facilities and aquacultures from the damage of microorganisms for long-term serves. However, it is still a challenge to fabricate coating with excellent antifouling performance and superior mechanical stability. Here, we report a bio-based amphiphilic hydrogel coating with excellent antifouling and mechanical properties. The coating was achieved by the in-situ formation of hydrophobic and hydrophilic interpenetrating polymer network (IPN). The hydrophobic part from a synthesized silicon-containing epoxy resin contributes to superior mechanical properties including high tensile strength and excellent adhesion of 5B. While the hydrophilic hydrogel part from the cross-linking of a hydrophilic polymer with AgNPs gives excellent antifouling properties, resist to proteins, bacteria, algae, and other marine organisms. The antifouling performance of the coating was evaluated by the attachment of proteins (BSA-FITC), bacteria ( Escherichia coli and Bacillus subtilis ), and Algae ( Navicula torguatum and Phaeodactylum tricornutum ). The results show that the bio-based amphiphilic hydrogel coating (e.g. SA-1-5) endows surface with excellent resistance to the fouling of proteins, bacteria and microorganisms. The overall antifouling and mechanical properties of the amphiphilic coating was also evaluated by field test in East China Sea from June 3rd 2020 to July 17th 2020 that the bio-based amphiphilic hydrogel coating was intact and almost no marine organisms attached. This work provides a new strategy for the fabrication of bio-based and high-performance antifouling coatings.
研究领域:
材料科学
·
海洋生物学
·
化学工程
·
生物技术
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产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 11
·1570
·
IF 4.7
Chuanying Wei,Yan Zhang,Zhen Tang,Changan Zhang,Jianhua Wu,Bo Wu
Poly(dimethylsiloxane) (PDMS) coatings are considered to be environmentally friendly antifouling coatings. However, the presence of hydrophobic surfaces can enhance the adhesion rate of proteins, bacteria and microalgae, posing a challenge for biofouling removal. In this study, hydrophilic polymer chains were synthesised from methyl methacrylate (MMA), Poly(ethylene glycol) methyl ether methacrylate (PEG-MA) and 3-(trimethoxysilyl) propyl methacrylate (TPMA). The crosslinking reaction between TPMA and PDMS results in the formation of a silicone-based amphiphilic co-network with surface reconstruction properties. The hydrophilic and hydrophobic domains are covalently bonded by condensation reactions, while the hydrophilic polymers migrate under water to induce surface reconstruction and form hydrogen bonds with water molecules to form a dense hydrated layer. This design effectively mitigates the adhesion of proteins, bacteria, algae and other marine organisms to the coating. The antifouling performance of the coatings was evaluated by assessing their adhesion rates to proteins (BSA-FITC), bacteria (B. subtilisandP. ruthenica) and algae (P. tricornutum). The results show that the amphiphilic co-network coating (e.g., P-AM-15) exhibits excellent antifouling properties against protein, bacterial and microalgal fouling. Furthermore, an overall assessment of its antifouling performance and stability was conducted in the East China Sea from 16 May to 12 September 2023, which showed that this silicon-based amphiphilic co-network coating remained intact with almost no marine organisms adhering to it. This study provides a novel approach for the development of high-performance silicone-based antifouling coatings.
研究领域:
材料科学
·
海洋生物学
·
化学工程
·
环境科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）