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Fan X, Ding S, Chen M, Gao S, Fu Z, Gong M, Wang Y, Zhang C. Mobility of chromium in sediments dominated by macrophytes and cyanobacteria in different zones of Lake Taihu. Sci Total Environ 2019; 666:994-1002. [PMID: 30970505 DOI: 10.1016/j.scitotenv.2019.02.299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 02/16/2019] [Accepted: 02/19/2019] [Indexed: 06/09/2023]
Abstract
To study the mechanisms of chromium (Cr) mobilization in sediments of lakes with different ecotypes, seasonal sampling was performed in the macrophyte-dominated East Taihu (MDET) and cyanobacteria-dominated Meiliang Bay (CDMB) in Lake Taihu. Concentrations of labile Cr(VI) and dissolved Cr were assessed using diffusive gradients in thin films (DGT) and high-resolution dialysis passive sampling devices, respectively. Results indicated that in pore water the dissolved Cr concentrations and in sediments total Cr and Cr fractions concentrations (dissolved, exchangeable and carbonate fraction (F1), Fe-Mn oxide fraction (F2), organic/sulfide fraction (F3)) were lower in MDET than in CDMB. However, the highly toxic DGT-labile Cr(VI) concentrations were higher in MDET sediments than in CDMB sediments. In the two lake zones, the seasonal variations in concentrations of dissolved Cr and DGT-labile Cr(VI) were significant, while total Cr and Cr fractions showed negligible changes (except F1 fraction). In summer, the high mobility of dissolved Cr (MDET: 103.42±10.82μg/L; CDMB: 108.99±4.24μg/L) were mainly caused by dissolved organic matter complexing with Cr(III). In winter the high mobility of dissolved Cr (MDET: 100.27±22.04μg/L; CDMB: 102.01±8.81μg/L) and DGT-labile Cr(VI) (MDET: 28.26±3.73μg/L; CDLZ: 25.82±2.26μg/L) were primarily caused by the oxidization of Cr (III) by Mn(III/IV) oxides. This study establishes the mechanisms for seasonal variation of Cr mobilization in different lake ecological zones, highlighting the urgent need for remediation of Cr pollution, especially in macrophyte-dominated lake zones.
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Affiliation(s)
- Xianfang Fan
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Shiming Ding
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.
| | - Musong Chen
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Shuaishuai Gao
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhen Fu
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Mengdan Gong
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Yan Wang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; Nanjing Easysensor Environmental Technology Co., Ltd, Nanjing 210018, China
| | - Chaosheng Zhang
- International Network for Environment and Health, School of Geography and Archaeology & Ryan Institute, National University of Ireland, Galway, Ireland
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Bergmann AJ, Points GL, Scott RP, Wilson G, Anderson KA. Development of quantitative screen for 1550 chemicals with GC-MS. Anal Bioanal Chem 2018; 410:3101-10. [PMID: 29552732 DOI: 10.1007/s00216-018-0997-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 02/13/2018] [Accepted: 03/05/2018] [Indexed: 12/02/2022]
Abstract
With hundreds of thousands of chemicals in the environment, effective monitoring requires high-throughput analytical techniques. This paper presents a quantitative screening method for 1550 chemicals based on statistical modeling of responses with identification and integration performed using deconvolution reporting software. The method was evaluated with representative environmental samples. We tested biological extracts, low-density polyethylene, and silicone passive sampling devices spiked with known concentrations of 196 representative chemicals. A multiple linear regression (R2 = 0.80) was developed with molecular weight, logP, polar surface area, and fractional ion abundance to predict chemical responses within a factor of 2.5. Linearity beyond the calibration had R2 > 0.97 for three orders of magnitude. Median limits of quantitation were estimated to be 201 pg/μL (1.9× standard deviation). The number of detected chemicals and the accuracy of quantitation were similar for environmental samples and standard solutions. To our knowledge, this is the most precise method for the largest number of semi-volatile organic chemicals lacking authentic standards. Accessible instrumentation and software make this method cost effective in quantifying a large, customizable list of chemicals. When paired with silicone wristband passive samplers, this quantitative screen will be very useful for epidemiology where binning of concentrations is common. A multiple linear regression of chemical responses measured with GC-MS allowed quantitation of 1550 chemicals in samples such as silicone wristbands. ![]()
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Maruya KA, Dodder NG, Weisberg SB, Gregorio D, Bishop JS, Klosterhaus S, Alvarez DA, Furlong ET, Bricker S, Kimbrough KL, Lauenstein GG. The Mussel Watch California pilot study on contaminants of emerging concern (CECs): synthesis and next steps. Mar Pollut Bull 2014; 81:355-363. [PMID: 23731723 DOI: 10.1016/j.marpolbul.2013.04.023] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2012] [Revised: 04/11/2013] [Accepted: 04/23/2013] [Indexed: 06/02/2023]
Abstract
A multiagency pilot study on mussels (Mytilus spp.) collected at 68 stations in California revealed that 98% of targeted contaminants of emerging concern (CECs) were infrequently detectable at concentrations ≤ 1 ng/g. Selected chemicals found in commercial and consumer products were more frequently detected at mean concentrations up to 470 ng/g dry wt. The number of CECs detected and their concentrations were greatest for stations categorized as urban or influenced by storm water discharge. Exposure to a broader suite of CECs was also characterized by passive sampling devices (PSDs), with estimated water concentrations of hydrophobic compounds correlated with Mytilus concentrations. The results underscore the need for focused CEC monitoring in coastal ecosystems and suggest that PSDs are complementary to bivalves in assessing water quality. Moreover, the partnership established among participating agencies led to increased spatial coverage, an expanded list of analytes and a more efficient use of available resources.
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Affiliation(s)
- Keith A Maruya
- Southern California Coastal Water Research Project Authority, 3535 Harbor Boulevard Suite 110, Costa Mesa, CA 92626, USA.
| | - Nathan G Dodder
- Southern California Coastal Water Research Project Authority, 3535 Harbor Boulevard Suite 110, Costa Mesa, CA 92626, USA
| | - Stephen B Weisberg
- Southern California Coastal Water Research Project Authority, 3535 Harbor Boulevard Suite 110, Costa Mesa, CA 92626, USA
| | - Dominic Gregorio
- California State Water Resources Control Board, 1001 I Street, Sacramento, CA 95814, USA
| | - Jonathan S Bishop
- California State Water Resources Control Board, 1001 I Street, Sacramento, CA 95814, USA
| | - Susan Klosterhaus
- San Francisco Estuary Institute, 4911 Central Avenue, Richmond, CA 94804, USA
| | - David A Alvarez
- US Geological Survey, 4200 New Haven Road, Columbia, MO 65201, USA
| | - Edward T Furlong
- US Geological Survey, Denver Federal Center, Denver, CO 80225, USA
| | - Suzanne Bricker
- National Oceanic and Atmospheric Administration, National Centers for Coastal Ocean Science, 1305 East West Highway, Silver Spring, MD 20910, USA
| | - Kimani L Kimbrough
- National Oceanic and Atmospheric Administration, National Centers for Coastal Ocean Science, 1305 East West Highway, Silver Spring, MD 20910, USA
| | - Gunnar G Lauenstein
- National Oceanic and Atmospheric Administration, National Centers for Coastal Ocean Science, 1305 East West Highway, Silver Spring, MD 20910, USA.
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Maruya KA, Dodder NG, Schaffner RA, Weisberg SB, Gregorio D, Klosterhaus S, Alvarez DA, Furlong ET, Kimbrough KL, Lauenstein GG, Christensen JD. Refocusing Mussel Watch on contaminants of emerging concern (CECs): the California pilot study (2009-10). Mar Pollut Bull 2014; 81:334-339. [PMID: 23886247 DOI: 10.1016/j.marpolbul.2013.04.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2012] [Revised: 04/11/2013] [Accepted: 04/23/2013] [Indexed: 06/02/2023]
Abstract
To expand the utility of the Mussel Watch Program, local, regional and state agencies in California partnered with NOAA to design a pilot study that targeted contaminants of emerging concern (CECs). Native mussels (Mytilus spp.) from 68 stations, stratified by land use and discharge scenario, were collected in 2009-10 and analyzed for 167 individual pharmaceuticals, industrial and commercial chemicals and current use pesticides. Passive sampling devices (PSDs) and caged Mytilus were co-deployed to expand the list of CECs, and to assess the ability of PSDs to mimic bioaccumulation by Mytilus. A performance-based quality assurance/quality control (QA/QC) approach was developed to ensure a high degree of data quality, consistency and comparability. Data management and analysis were streamlined and standardized using automated software tools. This pioneering study will help shape future monitoring efforts in California's coastal ecosystems, while serving as a model for monitoring CECs within the region and across the nation.
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Affiliation(s)
- Keith A Maruya
- Southern California Coastal Water Research Project Authority, 3535 Harbor Boulevard Suite 110, Costa Mesa, CA 92626, USA.
| | - Nathan G Dodder
- Southern California Coastal Water Research Project Authority, 3535 Harbor Boulevard Suite 110, Costa Mesa, CA 92626, USA
| | - Rebecca A Schaffner
- Southern California Coastal Water Research Project Authority, 3535 Harbor Boulevard Suite 110, Costa Mesa, CA 92626, USA
| | - Stephen B Weisberg
- Southern California Coastal Water Research Project Authority, 3535 Harbor Boulevard Suite 110, Costa Mesa, CA 92626, USA
| | - Dominic Gregorio
- California State Water Resources Control Board, 1001 I Street, Sacramento, CA 95814, USA
| | - Susan Klosterhaus
- San Francisco Estuary Institute, 4911 Central Avenue, Richmond, CA 94804, USA
| | - David A Alvarez
- U.S. Geological Survey, 4200 New Haven Road, Columbia, MO 65201, USA
| | - Edward T Furlong
- U.S. Geological Survey, Denver Federal Center, Denver, CO 80225, USA
| | - Kimani L Kimbrough
- National Oceanic and Atmospheric Administration, 1305 East West Highway, Silver Spring, MD 20910, USA
| | - Gunnar G Lauenstein
- National Oceanic and Atmospheric Administration, 1305 East West Highway, Silver Spring, MD 20910, USA.
| | - John D Christensen
- National Oceanic and Atmospheric Administration, 1305 East West Highway, Silver Spring, MD 20910, USA
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Li S, Anderson TA, Maul JD, Shrestha B, Green MJ, Cañas-Carrell JE. Comparative studies of multi-walled carbon nanotubes (MWNTs) and octadecyl (C18) as sorbents in passive sampling devices for biomimetic uptake of polycyclic aromatic hydrocarbons (PAHs) from soils. Sci Total Environ 2013; 461-462:560-567. [PMID: 23756215 DOI: 10.1016/j.scitotenv.2013.05.048] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Revised: 05/16/2013] [Accepted: 05/17/2013] [Indexed: 06/02/2023]
Abstract
To avoid overestimating the risk of polycyclic aromatic hydrocarbons (PAHs), research is needed to evaluate the bioavailable portion of PAHs in the environment. However, limited PSDs were developed for a terrestrial soil system. In this study, two sorbents, octadecyl (C18) and multi-walled carbon nanotubes (MWNTs), were individually evaluated as sorbents in passive sampling devices (PSDs) as biomimetic samplers to assess the uptake of PAHs from soil. C18-PSDs were an excellent biomimetic tool for PAHs with a low molecular weight in complex exposure conditions with different soil types, types of PAHs, aging periods, and initial PAH concentrations in soil. The utility of MWNT-PSDs was limited by extraction efficiencies of PAHs from MWNTs. However, when compared to C18-PSDs, they had higher adsorption capacities and were less expensive. This study provides data regarding useful techniques that can be used in risk assessment to assess the bioavailability of PAHs in soil.
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Affiliation(s)
- Shibin Li
- Department of Environmental Toxicology, The Institute of Environmental and Human Health (TIEHH), Texas Tech University, Box 41163, Lubbock, TX 79409-1163, USA.
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