The influence of colloids on the geochemical behavior of metals in polluted water using as an example Yongdingxin River, Tianjin, China

Ren, Hai; Liu, Huijuan; Qu, Jiuhui; Berg, Michael; Qi, Weixiao; Xu, Wei

doi:10.1016/j.chemosphere.2009.11.018

Cited by 34 publications

(10 citation statements)

References 25 publications

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“…The procedure was run to a concentration factor (CF = V total /V retentate ) of 6 (Dupre et al, 1999), and the colloidal concentration was captured by the equation: C colloidal = (C retentate À C permeate )/CF (Buesseler et al, 1996;Reitmeyer et al, 1996). The recovery, which was calculated for all ultrafiltration runs according to standard procedures (Ren et al, 2010), was generally 90-110% which can be considered as very good (Vasyukova et al, 2010) and occasionally 85% which is satisfactory . The major advantage of this technique is the small size of the filter and low volume of pore space which minimises adsorption inside the filter (Pokrovsky and Schott, 2002).…”

Section: Watermentioning

confidence: 99%

Attenuation of rare earth elements in a boreal estuary

Åström

Österholm

Gustafsson

et al. 2012

Geochimica et Cosmochimica Acta

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Section: Watermentioning

confidence: 99%

Attenuation of rare earth elements in a boreal estuary

Åström

Österholm

Gustafsson

et al. 2012

Geochimica et Cosmochimica Acta

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“…Along the Western coastal zone of Bohai Bay, there are three major estuaries including the Yongdingxin River, Haihe River, and Duliujian River (Figure 1). The Yongdingxin River receives a great deal of industrial effluents from Tianjin and industrial and municipal sewage from Beijing without any treatment or with primary treatment only, via small streams or sewers, including heavy metals such as Cu, Zn, Mn and Ni (Beitang Drainage River, for example) [30,97]. It has been reported that sediment in the Yongdingxin River estuary has been contaminated by Cu with its concentration as high as 38.99 mg•kg −1 [22].…”

Section: Source Identification Of Metalsmentioning

confidence: 99%

Distribution and Risk Assessment of Heavy Metals in Sediment from Bohai Bay, China

2019

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Sediment core and porewater samples from the Western coastal tidal flat in Bohai Bay, China, were collected for meals and physical-chemical properties analysis. The vertical distribution characteristics of eight metals along the core was investigated based on 137Cs and 210Pb radionuclide dating. The chemical fractions of six metals (Cu, Pb, Zn, Ni, Mn and Cd) were also measured based on the modified European Community Bureau of Reference (BCR) sequential extraction procedures to better understand the mobility and bioavailability of these metals in the sediment. In addition, geoaccumulation index (Igeo) and risk assessment code (RAC) are used to assess risk status of these metals in the environment. 210Pb measurement indicates a sedimentation rate of about −1.87 cm∙year−1. The metals Cu, Zn, Pb and Ni show similar vertical distributions throughout the core, while Mn and Cd show different distribution patterns. Ni, Cu, Pb and Zn are strongly associated with the residual fraction while Mn and Cd are dominant in the acid-soluble fraction. According to the estimated diffusive fluxes, the Zn ions were the most mobilized, followed by Cu, Ni, Pb, and to a lesser extent Cd. The result of Igeo shows that Ni in sediments does not reflect any pollution, and Cu, Pb and Zn are in a level from unpolluted to modest polluted throughout the core. Mn and Cd have obvious anthropogenic sources. Based on the RAC, Cd and Mn pose a high to very high risk to the local environment, respectively, due to the significant percentage of exchangeable fraction. Clay content is significantly positively correlated with Ni, Cu, Al and Fe, and Cu, Pb, Zn and Ni might originate from the same sources or be influenced by similar geochemical processes. River runoff and atmospheric deposition are important sources for heavy metals, and since 1998, domestic sewage discharge might have had an important influence on the source of heavy metals (except for Cd and Mn).

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“…The elemental concentrations in D and C were determined using ICP-OES (Prodigy, Leeman, USA). Acid digestions were performed prior to the element analyses using ultra-pure concentrated nitric acid to acidify the subsamples of all fractions to pH 2 (Ren et al 2010), and procedural blanks were included to check for ambient or reagent contamination. All of the measurements were performed in duplicate.…”

Section: Colloid Separation and Characterizationmentioning

confidence: 99%

Adsorption of three selected endocrine disrupting chemicals by aquatic colloids and sediments in single and binary systems

Sun

Zhou

2014

J Soils Sediments

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Purpose Aquatic colloids are ubiquitous in natural river water, but their effects on the adsorption of pollutants by sediments are not fully understood. This study investigated the adsorption of three endocrine disrupting chemicals (EDCs) by aquatic colloids and sediments in single and binary systems. The role of aquatic colloids in the adsorption of EDCs by sediments in the binary system was evaluated. Materials and methods Water and sediment samples were collected from Huanyuankou (HS) and Lijin (LS) stations in the middle-low reaches of the Yellow River (China), and the aquatic colloids were separated using cross-flow filtration. The properties of aquatic colloids were characterized using an inductively coupled plasma-optical emission spectrometer, a TOC/TN analyzer, and a fluorescence spectrophotometer. Batch experiments were conducted to investigate the adsorption of three selected EDCs (bisphenol A (BPA), 17β-estradiol (E2), and 17α-ethynylestradiol (EE2)) by aquatic colloids and sediments. BPA, E2, and EE2 were quantified using liquid chromatography-tandem mass spectrometry (LC-MS/MS). The adsorption data were described by the linear, Freundlich, and Langmuir adsorption isotherms. The contributions of aquatic colloids to the total adsorption of EDCs were evaluated in the context of the binary system of aquatic colloids and sediments. Results and discussion In a single system of colloids, the adsorption parameters of linear, Freundlich, and Langmuir isotherms (K f , K d , and K L Q max ) follow the order of BPA> EE2>E2, indicating the important role of inorganic minerals in the adsorption of EDCs. In a single system of sediments and binary system of colloids and sediments, the K f , K d , and K L Q max values follow the order of E2>EE2>BPA, suggesting that the main adsorption mechanism is hydrophobic interaction. Moreover, the colloids promote adsorption of EDCs by sediments in a binary system. Although the colloidal contents are much lower than the contents of the sediments, the contributions of colloids to the total EDCs adsorption are up to 35-60 % for LS and 10-28 % for HS. Conclusions In a single system of colloids, both organic and inorganic components of colloids enhance the adsorption of EDCs. In a single system of sediments and a binary system of colloids and sediments, the adsorption of EDCs is mainly induced by the nonspecific hydrophobic interaction between EDCs and organic matters in the sediments and colloids. The colloids enhance the adsorption of EDCs; the more the EDCs are adsorbed by colloids, the greater are the contributions of colloids to the total adsorption of EDCs.

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The influence of colloids on the geochemical behavior of metals in polluted water using as an example Yongdingxin River, Tianjin, China

Cited by 34 publications

References 25 publications

Attenuation of rare earth elements in a boreal estuary

Attenuation of rare earth elements in a boreal estuary

Distribution and Risk Assessment of Heavy Metals in Sediment from Bohai Bay, China

Adsorption of three selected endocrine disrupting chemicals by aquatic colloids and sediments in single and binary systems

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