Predicted no-effect concentrations for mercury species and ecological risk assessment for mercury pollution in aquatic environment

Du, Meng; Wei, Dongbin; Tan, Zhuowei; Lin, Aiwu; Du, Yuguo

doi:10.1016/j.jes.2014.06.042

Cited by 22 publications

(8 citation statements)

References 25 publications

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“…Till now, several methods have been developed to evaluate the ecological risk assessment of heavy metals in sediment, including geo-accumulation indexes (Hu et al, 2014;Niu et al, 2019), risk assessment code (Wang et al, 2017), and risk quotient (Du et al, 2015). Among them, the risk quotient (RQ) is the most feasible method for the risk characterization of pollutants in environment and has been used to evaluate the risk level of Hg in sediment (Du et al, 2015). Based on the Hg concentrations in Taihu Lake sediment and the SQC of Hg derived in this study, the RQ method was used to evaluate the ecological risk of mercury.…”

Section: Risk Assessment Of Hg In Sedimentmentioning

confidence: 99%

Distribution Characteristics and Risk Assessment of Mercury in Sediments From Taihu Lake

Shi

Yang

et al. 2021

Front. Environ. Sci.

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Persistent pollutants are easily accumulated in sediments, which can cause toxicity to benthos and secondary pollution to water. Mercury (Hg), as one kind of bioaccumulative and persistent pollutant, could cause great harm to water ecology and health, and has been widely concerned. The distribution characteristics and ecological risk of Hg in sediments from Taihu Lake were studied. In addition, the sediment quality criterion (SQC) of Hg was derived using tissue-based toxicity data combined with the phase-equilibrium partitioning (EqP) approach, and the ecological risk level of Hg in Taihu Lake sediment was evaluated. The results showed that Hg was detected in all the 30 sediment samples, and the concentrations of Hg ranged from 9.7 ng/g to 237.0 ng/g, with an average of 76.3 ng/g. The SQC of Hg was calculated to be 108.9 ng/g, and the ecological risk of Hg in the sediments of Taihu Lake is in the middle level, indicating that Hg pollution needs to be paid more attention. The results provide support for environmental management and risk assessment of Hg.

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Section: Risk Assessment Of Hg In Sedimentmentioning

confidence: 99%

Distribution Characteristics and Risk Assessment of Mercury in Sediments From Taihu Lake

Shi

Yang

et al. 2021

Front. Environ. Sci.

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“…Pencemaran merkuri di perairan menjadi masalah dengan terbentuknya metil merkuri yang berbahaya bagi ekosistem dan manusia [1], [6]. Keberadaan merkuri di lingkungan mempunyai berbagai bentuk, baik sebagai anorganik maupun organik dengan potensi racun yang berbeda [4], [7], [8]. Selain itu, merkuri juga dapat bertahan lama di atmosfer dan dapat ditransportasikan secara global [9].…”

Section: Pendahuluanunclassified

Distribusi Pencemaran Merkuri Di Das Batanghari Sumatera

Ratnaningsih¹,

Fauzi²,

Hidayat³

et al. 2019

ecolab

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Sungai Batanghari yang melintasi Provinsi Sumatera Barat dan Jambi mempunyai potensi deposit emas, khususnya di wilayah hulu sungai yang berada di Provinsi Sumatera Barat. Potensi tersebut mengakibatkan timbulnya penambangan emas secara tradisional dengan menggunakan merkuri. Aktivitas tersebut potensial mengakibatkan pencemaran merkuri pada badan sungai. Penelitian ini bertujuan untuk mengidentifikasi distribusi pencemaran merkuri pada sungai tersebut. Pengambilan sampel dilakukan di 10 lokasi di Daerah Aliran Sungai (DAS) Batanghari yang berada di Provinsi Sumatera Barat dan 5 lokasi di Provinsi Jambi pada tahun 2007-2008. Selain itu, data juga diambil 6 titik pantau yang berbeda yang berada di wilayah hulu Sumatera Barat dengan frekuensi pengambilan sampel dilakukan 5 kali dalam setahun pada periode 2008-2014. Pemantauan di 6 titik pantau yang berbeda dilakukan atas kerjasama antara Kementerian Lingkungan Hidup dan Kehutanan dengan Dinas Lingkungan Hidup Provinsi Sumatera Barat. Hasil pemantauan mengindikasikan adanya distribusi merkuri baik di air sungai maupun sedimen sungai. Merkuri di air sungai berfluktuasi pada kisaran <0,0005-0,0645 mg/L, sedangkan pada sedimen sungai terdeteksi dengan kisaran 0,01-0,42 mg/kg. Keberadaan merkuri di air sungai dan sedimen sungai perlu mendapatkan perhatian agar sumber pencemar yang berasal dari pertambangan emas tradisional dapat dicegah.

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“…In addition to the understanding of acute toxicity, examining the effects of Hg species at low concentrations could provide useful information in accurately assessing the risks of mercury in natural environments (Du et al, 2015). In light of T. corlissi's unique Hg uptake characteristics, we evaluated the effect of mercury species on the proliferation of T. corlissi at low concentration (0.003 and 0.01 μg Hg/mL (15 and 50 nM)) after exposure for 24 h. Upon FACS analysis, the morphology and the intracellular structure of T. corlissi cells can be evaluated using Forward Scattering (FSC) and Side Scattering (SSC).…”

Section: Both Hg 2+ and Mehg Triggered Promoting Effect On The Proliferation Of T Corlissi Under Low Concentration Exposurementioning

confidence: 99%

Distinct toxicological characteristics and mechanisms of Hg2+ and MeHg in Tetrahymena under low concentration exposure

Liu

Cao

et al. 2017

Aquatic Toxicology

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Inorganic divalent mercury complexes (Hg) and monomethylmercury complexes (MeHg) are the main mercury species in aquatic systems and their toxicity to aquatic organisms is of great concern. Tetrahymena is a type of unicellular eukaryotic protozoa located at the bottom of food chain that plays a fundamental role in the biomagnification of mercury. In this work, the dynamic accumulation properties, toxicological characteristics and mechanisms of Hg and MeHg in five Tetrahymena species were evaluated in detail. The results showed that both Hg and MeHg were ingested and exhibited inhibitory effects on the proliferation or survival of Tetrahymena species. However, the ingestion rate of MeHg was significantly higher than that of Hg. The mechanisms responsible for the toxicity of MeHg and Hg were different, although both chemicals altered mitochondrial membrane potential (MMP). MeHg disrupted the integrity of membranes while Hg had detrimental effects on Tetrahymena as a result of the increased generation of reactive oxygen species (ROS). In addition, the five Tetrahymena species showed different capacities in accumulating Hg and MeHg, with T. corlissi exhibiting the highest accumulations. The study also found significant growth-promoting effect on T. corlissi under low concentration exposure (0.003 and 0.01μg Hg/mL (15 and 50nM)), suggesting different effect and mechanism that should be more closely examined when assessing the bioaccumulation and toxicity of mercury in aquatic ecosystems.

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Predicted no-effect concentrations for mercury species and ecological risk assessment for mercury pollution in aquatic environment

Cited by 22 publications

References 25 publications

Distribution Characteristics and Risk Assessment of Mercury in Sediments From Taihu Lake

Distribution Characteristics and Risk Assessment of Mercury in Sediments From Taihu Lake

Distribusi Pencemaran Merkuri Di Das Batanghari Sumatera

Distinct toxicological characteristics and mechanisms of Hg2+ and MeHg in Tetrahymena under low concentration exposure

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