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Li M, Xiao M, Xiao Q, Chen Y, Guo Y, Sun J, Li R, Li C, Zhu Z, Qiu H, Liu X, Lu S. Perchlorate and chlorate in breast milk, infant formulas, baby supplementary food and the implications for infant exposure. ENVIRONMENT INTERNATIONAL 2022; 158:106939. [PMID: 34673317 DOI: 10.1016/j.envint.2021.106939] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 10/08/2021] [Accepted: 10/12/2021] [Indexed: 06/13/2023]
Abstract
Perchlorate and chlorate are ubiquitous pollutants in various types of foodstuffs, drinking water and environmental compartments. They have raised great concerns due to potential adverse effects on human thyroid functions. Dietary intake is considered as the predominant pathway for human exposure to perchlorate and chlorate. Nevertheless, data on human exposure to the chemicals above remain limited, particularly for the most vulnerable populations such as infants. In the present study, 62 breast milks, 53 infant formulas, 88 baby supplementary food and 50 tap water samples were collected in South China and the levels of perchlorate and chlorate were measured in these samples. Perchlorate and chlorate were frequently detected in more than 90% of measured samples. In these different types of samples, the median concentrations of perchlorate were 0.65 μg/L, 0.61 μg/kg, 0.56 μg/kg and 1.18 μg/L, respectively, while the median concentrations of chlorate were 1.73 μg/L, 2.48 μg/kg, 2.67 μg/kg and non-detected, respectively. Health risk assessment using hazard quotient suggested that perchlorate and chlorate exposure in the sampled baby food are not expected to increase the risk of an adverse health effect. To our knowledge, this is the first study simultaneously investigating perchlorate and chlorate exposure in Chinese infants via food intake.
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Affiliation(s)
- Minhui Li
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, China
| | - Minhua Xiao
- Department of Clinical Nutrition, Guangzhou Women and Children's Medical Centre, Guangzhou, China
| | - Qinru Xiao
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, China
| | - Yining Chen
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, China
| | - Yichen Guo
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, China
| | - Jing Sun
- Department of Clinical Nutrition, Guangzhou Women and Children's Medical Centre, Guangzhou, China
| | - Rong Li
- Department of Clinical Nutrition, Guangzhou Women and Children's Medical Centre, Guangzhou, China
| | - Chun Li
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, China
| | - Zhou Zhu
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Hongmei Qiu
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Xihong Liu
- Department of Clinical Nutrition, Guangzhou Women and Children's Medical Centre, Guangzhou, China.
| | - Shaoyou Lu
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, China.
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Abstract
Perchlorate (ClO4−) is an emerging persistent pollutant that is ubiquitous in the environment at trace concentrations. Perchlorate ingestion poses a risk to human health because it interferes with thyroidal hormone production. The identification of perchlorate sources in groundwater is a primary concern. Chlorine and multi-oxygen isotopic tracing of perchlorate (δ37Cl, 36Cl/Cl, δ18O, and Δ17O) can provide a unique tool for identifying the origin and transport of perchlorate in groundwater. Along with the kinetic fractionation of chlorine and oxygen isotopes, the Δ17O value, 36Cl/Cl ratio, and ε18O/ε37Cl (the fractionation coefficient of oxygen and chlorine isotopes) are constant, potentially indicating the biodegradation of perchlorate, without disguising its source information. Therefore, comprehensive characterization of stable chlorine and poly-oxygen isotopes is expected to provide direct evidence for identifying the source of perchlorate in groundwater. However, further studies are needed to increase the amount of isotopic data of different perchlorate sources, to make the end-member model available to broader regions. It is critically important to understand the range of values and differences of isotopes among natural perchlorate sources and the perchlorate formation mechanisms.
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3
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Tian Y, Xu H, Liu S, Fang M, Wu Y, Gong Z. Study on the bioaccessibility and bioavailability of perchlorate in different food matrices in vitro. Food Chem 2020; 333:127470. [PMID: 32653684 DOI: 10.1016/j.foodchem.2020.127470] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 06/18/2020] [Accepted: 06/29/2020] [Indexed: 10/23/2022]
Abstract
Perchlorate, a persistent pollutant, interferes with iodine uptake by the thyroid. Perchlorate exposure mainly occurs through ingested food; understanding the bioaccessibility and bioavailability of perchlorate in foods facilitate more accurate human health risk assessments. An in vitro digestion/Caco-2 cell model was used for this research. The bioaccessibility of perchlorate in the control group, lettuce, rice and formula was 93.45%, 70.14%, 70.25%, and 63.68%, respectively. The bioavailability of perchlorate was as follows: control group, 43.45%; rice, 37.17%; lettuce, 35.13%; and formula, 30.72%. The absorptive apparent permeability coefficient (Papp) of the control, lettuce, rice, and formula was 30-101 nm/s, 32-65 nm/s, 54-161 nm/s, and 41-88 nm/s, respectively. The results suggested that the risk from perchlorate was overestimated only when considering the content of perchlorate in foods and that the presence of food matrices reduced perchlorate bioavailability by differing degrees.
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Affiliation(s)
- Yimei Tian
- Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China
| | - Hao Xu
- Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China
| | - Shiqiao Liu
- Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China
| | - Min Fang
- Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China
| | - Yongning Wu
- NHC Key Laboratory of Food Safety Risk Assessment, Food Safety Research Unit (2019RU014) of Chinese Academy of Medical Science, China National Center for Food Safety Risk Assessment, Beijing 100021, People's Republic of China
| | - Zhiyong Gong
- Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China.
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McCarthy WP, O'Callaghan TF, Danahar M, Gleeson D, O'Connor C, Fenelon MA, Tobin JT. Chlorate and Other Oxychlorine Contaminants Within the Dairy Supply Chain. Compr Rev Food Sci Food Saf 2018; 17:1561-1575. [DOI: 10.1111/1541-4337.12393] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 08/24/2018] [Accepted: 08/27/2018] [Indexed: 11/27/2022]
Affiliation(s)
- William P. McCarthy
- Food Chemistry & Technology Dept.; Teagasc Food Research Centre, Moorepark; Fermoy, Co. Cork Cork Ireland
- Dublin Inst. of Technology; Cathal Brugha Street, Dublin 1 Dublin Ireland
| | - Tom F. O'Callaghan
- Food Chemistry & Technology Dept.; Teagasc Food Research Centre, Moorepark; Fermoy, Co. Cork Cork Ireland
| | - Martin Danahar
- Food Safety Dept.; Ashtown Food Research Centre; Teagasc, Ashtown, Dublin 15 Dublin Ireland
| | - David Gleeson
- Teagasc; Animal & Grassland Research and Innovation Centre, Moorepark; Fermoy Co. Cork, Cork Ireland
| | - Christine O'Connor
- Dublin Inst. of Technology; Cathal Brugha Street, Dublin 1 Dublin Ireland
| | - Mark A. Fenelon
- Food Chemistry & Technology Dept.; Teagasc Food Research Centre, Moorepark; Fermoy, Co. Cork Cork Ireland
| | - John T. Tobin
- Food Chemistry & Technology Dept.; Teagasc Food Research Centre, Moorepark; Fermoy, Co. Cork Cork Ireland
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Can O, Blount B, Valentin-Blasini L, Erdemgil Y, Uzunoglu D, Aksoy M, Coskun A, Serteser M, Unsal I, Ozpinar A. Perchlorate Exposure Through Water and Milk in Istanbul. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2016; 97:439-445. [PMID: 27435977 DOI: 10.1007/s00128-016-1889-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 07/14/2016] [Indexed: 06/06/2023]
Abstract
Perchlorate is a chemical pollutant that inhibits iodide uptake and may possibly impair thyroid function. Our previous study found widespread perchlorate exposure in non-pregnant, non-lactating, healthy women residing in Istanbul. The aim of this study is to assess the relative amounts of perchlorate exposure attributable to consumption of municipal water, bottled water and boxed milk available in Istanbul. Only trace levels of perchlorate were found in treated municipal water (58 % detectable, mean = 0.13 µg/L, maximum = 0.75 µg/L) and bottled water (7.4 % detectable, mean = <LOD, maximum = 0.19 µg/L). Conversely, all 30 boxed milk samples contained measurable levels of perchlorate (mean = 4.53 µg/L; maximum = 6.21 µg/L). Median perchlorate exposure attributable to water and milk (0.007 µg/kg/day) is small compared both to the reference dose (0.7 µg/kg/day) and to total perchlorate exposure (0.13 µg/kg/day) in Istanbul. Therefore, additional studies are needed to identify the major sources of perchlorate exposure in Istanbul.
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Affiliation(s)
- Ozge Can
- Department of Medical Engineering, Acibadem University, Istanbul, Turkey
| | - Ben Blount
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | | | - Yigit Erdemgil
- Department of Medical Biochemistry, School of Medicine, Acibadem University, Kayisdagi Caddesi, No:32, Atasehir, Istanbul, Turkey
| | - Deniz Uzunoglu
- Department of Medical Biochemistry, School of Medicine, Acibadem University, Kayisdagi Caddesi, No:32, Atasehir, Istanbul, Turkey
| | - Murat Aksoy
- Department of Medical Biochemistry, School of Medicine, Acibadem University, Kayisdagi Caddesi, No:32, Atasehir, Istanbul, Turkey
| | - Abdurrahman Coskun
- Department of Medical Biochemistry, School of Medicine, Acibadem University, Kayisdagi Caddesi, No:32, Atasehir, Istanbul, Turkey
| | - Mustafa Serteser
- Department of Medical Biochemistry, School of Medicine, Acibadem University, Kayisdagi Caddesi, No:32, Atasehir, Istanbul, Turkey
| | - Ibrahim Unsal
- Department of Medical Biochemistry, School of Medicine, Acibadem University, Kayisdagi Caddesi, No:32, Atasehir, Istanbul, Turkey
| | - Aysel Ozpinar
- Department of Medical Biochemistry, School of Medicine, Acibadem University, Kayisdagi Caddesi, No:32, Atasehir, Istanbul, Turkey.
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Mortensen ME, Birch R, Wong LY, Valentin-Blasini L, Boyle EB, Caldwell KL, Merrill LS, Moye J, Blount BC. Thyroid antagonists and thyroid indicators in U.S. pregnant women in the Vanguard Study of the National Children's Study. ENVIRONMENTAL RESEARCH 2016; 149:179-188. [PMID: 27208469 PMCID: PMC4907850 DOI: 10.1016/j.envres.2016.05.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 05/10/2016] [Accepted: 05/11/2016] [Indexed: 05/28/2023]
Abstract
The sodium iodide-symporter (NIS) mediates uptake of iodide into thyroid follicular cells. This key step in thyroid hormone synthesis is inhibited by perchlorate, thiocyanate (SCN) and nitrate (NO3) anions. When these exposures occur during pregnancy the resulting decreases in thyroid hormones may adversely affect neurodevelopment of the human fetus. Our objectives were to describe and examine the relationship of these anions to the serum thyroid indicators, thyroid stimulating hormone (TSH) and free thyroxine (FT4), in third trimester women from the initial Vanguard Study of the National Children's Study (NCS); and to compare urine perchlorate results with those in pregnant women from the National Health and Nutritional Examination Survey (NHANES). Urinary perchlorate, SCN, NO3, and iodine, serum TSH, FT4, and cotinine were measured and a food frequency questionnaire (FFQ) was administered to pregnant women enrolled in the initial Vanguard Study. We used multiple regression models of FT4 and TSH that included perchlorate equivalent concentration (PEC, which estimates combined inhibitory effects of the anions perchlorate, SCN, and NO3 on the NIS). We used multiple regression to model predictors of each urinary anion, using FFQ results, drinking water source, season of year, smoking status, and demographic characteristics. Descriptive statistics were calculated for pregnant women in NHANES 2001-2012. The geometric mean (GM) for urinary perchlorate was 4.04µg/L, for TSH 1.46mIU/L, and the arithmetic mean for FT4 1.11ng/dL in 359 NCS women. In 330 women with completed FFQs, consumption of leafy greens, winter season, and Hispanic ethnicity were significant predictors of higher urinary perchlorate, which differed significantly by study site and primary drinking water source, and bottled water was associated with higher urinary perchlorate compared to filtered tap water. Leafy greens consumption was associated with higher urinary NO3 and higher urinary SCN. There was no association between urinary perchlorate or PEC and TSH or FT4, even for women with urinary iodine <100µg/L. GM urinary perchlorate concentrations in the full sample (n=494) of third trimester NCS women (4.03µg/L) were similar to pregnant women in NHANES (3.58µg/L).
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Affiliation(s)
- Mary E Mortensen
- Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, United States.
| | | | - Lee-Yang Wong
- Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, United States
| | - Liza Valentin-Blasini
- Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, United States
| | | | - Kathleen L Caldwell
- Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, United States
| | | | - John Moye
- NCS Program Office, Eunice Kennedy Shriver National Institute for Child Health and Human Development, National Institutes for Health, Bethesda, MD, United States
| | - Benjamin C Blount
- Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, United States
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7
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Kumarathilaka P, Oze C, Indraratne SP, Vithanage M. Perchlorate as an emerging contaminant in soil, water and food. CHEMOSPHERE 2016; 150:667-677. [PMID: 26868023 DOI: 10.1016/j.chemosphere.2016.01.109] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 01/11/2016] [Accepted: 01/25/2016] [Indexed: 06/05/2023]
Abstract
Perchlorate ( [Formula: see text] ) is a strong oxidizer and has gained significant attention due to its reactivity, occurrence, and persistence in surface water, groundwater, soil and food. Stable isotope techniques (i.e., ((18)O/(16)O and (17)O/(16)O) and (37)Cl/(35)Cl) facilitate the differentiation of naturally occurring perchlorate from anthropogenic perchlorate. At high enough concentrations, perchlorate can inhibit proper function of the thyroid gland. Dietary reference dose (RfD) for perchlorate exposure from both food and water is set at 0.7 μg kg(-1) body weight/day which translates to a drinking water level of 24.5 μg L(-1). Chromatographic techniques (i.e., ion chromatography and liquid chromatography mass spectrometry) can be successfully used to detect trace level of perchlorate in environmental samples. Perchlorate can be effectively removed by wide variety of remediation techniques such as bio-reduction, chemical reduction, adsorption, membrane filtration, ion exchange and electro-reduction. Bio-reduction is appropriate for large scale treatment plants whereas ion exchange is suitable for removing trace level of perchlorate in aqueous medium. The environmental occurrence of perchlorate, toxicity, analytical techniques, removal technologies are presented.
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Affiliation(s)
- Prasanna Kumarathilaka
- Chemical and Environmental Systems Modeling Research Group, National Institute of Fundamental Studies, Kandy, Sri Lanka
| | - Christopher Oze
- Geology Department, Occidental College, 1600 Campus Rd., Los Angeles, CA 90041, USA
| | - S P Indraratne
- Department of Soil Science, Faculty of Agriculture, University of Peradeniya, Sri Lanka
| | - Meththika Vithanage
- Chemical and Environmental Systems Modeling Research Group, National Institute of Fundamental Studies, Kandy, Sri Lanka.
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8
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Preparation and characterization of functionalized poly(vinyl chloride) membranes for selective separation of perchlorate from water. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2014.10.054] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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9
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Perchlorate in der Nahrungskette: Herkunft, Umweltverhalten und Toxikologie. J Verbrauch Lebensm 2014. [DOI: 10.1007/s00003-014-0877-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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10
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Zhao X, Zhou P, Chen X, Li X, Ding L. Perchlorate-induced oxidative stress in isolated liver mitochondria. ECOTOXICOLOGY (LONDON, ENGLAND) 2014; 23:1846-1853. [PMID: 25139032 DOI: 10.1007/s10646-014-1312-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/09/2014] [Indexed: 06/03/2023]
Abstract
As a new threat to environment all through the world, perchlorate (ClO4(-)) was predominantly a thyrotoxin, and its toxic manifestations in non-thyroid were also documented. To date, little is known about the effect of ClO4(-) on cell and organelle. To reveal the toxicity of ClO4(-) on living organism in-depth, mitochondria isolated from liver of Carassius auratus were incubated with different concentrations of ClO4(-). The results demonstrated that ClO4(-)-induced mitochondrial oxidative stress, and subsequently caused a gradual opening of permeability transition pore leading to mitochondrial swelling and lipid peroxidative membrane damage. ClO4(-) has a conspicuous inhibition of electron transport chain activity which largely correlated to complexes I and IV. The investigations clearly demonstrated the oxidative stress of ClO4(-) in mitochondria, may well reveal cytotoxic effects in vitro that merit further investigation.
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Affiliation(s)
- Xiaohu Zhao
- Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, College of Resources and Environmental Sciences, Wuhan University, Wuhan, 430072, Hubei, China,
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Sungur Ş, Atan MM. Determination of nitrate, nitrite and perchlorate anions in meat, milk and their products consumed in Hatay region in Turkey. FOOD ADDITIVES & CONTAMINANTS PART B-SURVEILLANCE 2013; 6:6-10. [DOI: 10.1080/19393210.2012.717108] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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12
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Ha W, Suarez DL, Lesch SM. Predicting perchlorate uptake in greenhouse lettuce from perchlorate, nitrate, and chloride irrigation water concentrations. JOURNAL OF ENVIRONMENTAL QUALITY 2013; 42:208-18. [PMID: 23673756 DOI: 10.2134/jeq2012.0142] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Perchlorate (ClO) has been detected in edible leafy vegetables irrigated with Colorado River water. The primary concern has been the ClO concentration in lettuce ( L. var. L.). There has been a limited number of studies on ClO uptake, but the interactive effect of other anions on ClO uptake is not known in detail. We conducted a greenhouse ClO uptake experiment using two types of lettuce (iceberg and butterhead) to investigate the interaction of uptake of ClO, Cl, and NO on ClO uptake under controlled conditions. We examined three concentrations of ClO, 40, 220, and 400 nmol/L; Cl at 2.5, 13.75, and 25 mmol/L; and NO at 2, 11, and 20 mmol/L. Perchlorate was taken up the most in lettuce when ClO was the greatest and NO and Cl were lowest in concentration in the irrigation water. More ClO was detected in leafy material than in root tissue. In general, the outer leaves of iceberg and butterhead lettuce contained more ClO than did the inner leaves. The results indicate that selective ClO uptake occurs for green leaf lettuce. A predictive model was developed to describe the ClO concentration in lettuce as related to the Cl, NO, and ClO concentration in the irrigation water. Research results can be utilized to elucidate the effect of salts on the accumulation and uptake of ClO by edible leafy vegetables.
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Yang Y, Tan YM, Blount B, Murray C, Egan S, Bolger M, Clewell H. Using a physiologically based pharmacokinetic model to link urinary biomarker concentrations to dietary exposure of perchlorate. CHEMOSPHERE 2012; 88:1019-1027. [PMID: 22520969 DOI: 10.1016/j.chemosphere.2012.03.074] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Accepted: 03/25/2012] [Indexed: 05/31/2023]
Abstract
Exposure to perchlorate is widespread in the United States and many studies have attempted to character the perchlorate exposure by estimating the average daily intakes of perchlorate. These approaches provided population-based estimates, but did not provide individual-level exposure estimates. Until recently, exposure activity database such as CSFII, TDS and NHANES become available and provide opportunities to evaluate the individual-level exposure to chemical using exposure surveillance dataset. In this study, we use perchlorate as an example to investigate the usefulness of urinary biomarker data for predicting exposures at the individual level. Specifically, two analyses were conducted: (1) using data from a controlled human study to examine the ability of a physiologically based pharmacokinetic (PBPK) model to predict perchlorate concentrations in single-spot and cumulative urine samples; and (2) using biomarker data from a population-based study and a PBPK model to demonstrate the challenges in linking urinary biomarker concentrations to intake doses for individuals. Results showed that the modeling approach was able to characterize the distribution of biomarker concentrations at the population level, but predicting the exposure-biomarker relationship for individuals was much more difficult. The type of information needed to reduce the uncertainty in estimating intake doses, for individuals, based on biomarker measurements is discussed.
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Affiliation(s)
- Yuching Yang
- The Hamner Institutes for Health Sciences, RTP, NC, USA.
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Yang Y, Gao N, Chu W, Zhang Y, Ma Y. Adsorption of perchlorate from aqueous solution by the calcination product of Mg/(Al-Fe) hydrotalcite-like compounds. JOURNAL OF HAZARDOUS MATERIALS 2012; 209-210:318-325. [PMID: 22325635 DOI: 10.1016/j.jhazmat.2012.01.026] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Revised: 01/09/2012] [Accepted: 01/09/2012] [Indexed: 05/31/2023]
Abstract
The calcination products containing Mg(II), Al(III), and Fe(III) in the brucite-like layers with varying Mg/Al/Fe molar ratios at 550°C were used as the adsorbent to remove perchlorate from aqueous solution, while the Mg/(Al-Fe) hydrotalcite compounds were synthesized by co-precipitation method at a constant pH value. The Mg/(Al-Fe) hydrotalcite compounds (HMAF) were characterized by XRD, FT-IR and TG-DTA. The characteristics showed that the layered double hydroxides structures in the HMAF were lost during calcination at 550°C, but were reconstructed subsequent to adsorption of perchlorate, indicating that the 'memory effect' appeared to play an important role in perchlorate adsorption. Batch adsorption studies were conducted under various equilibration conditions, such as molar ratios of Mg/Al/Fe, calcined temperature, different initial solution pH, adsorbent dose, initial perchlorate concentration, and co-existing anions. It was found that the existence of ferric iron in calcined Mg/(Al-Fe) hydrotalcite compound (CHMAF) was favorable to removal of perchlorate from water, and the best ratio of Mg/Al/Fe is 3:0.8:0.2 (CHMAF5%). This study demonstrated that the calcination product of Mg/(Al-Fe) hydrotalcite-like compound was a promising adsorbent for control of the perchlorate pollution in water.
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Affiliation(s)
- Yiqiong Yang
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China
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15
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Ha W, Suarez DL, Lesch SM. Perchlorate uptake in spinach as related to perchlorate, nitrate, and chloride concentrations in irrigation water. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:9363-9371. [PMID: 21939238 DOI: 10.1021/es2010094] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Several studies have reported on the detection of perchlorate (ClO(4)(-)) in edible leafy vegetables irrigated with Colorado River water. However, there is no information on spinach as related to ClO(4)(-) in irrigation water nor on the effect of other anions on ClO(4)(-) uptake. A greenhouse ClO(4)(-) uptake experiment using spinach was conducted to investigate the impact of presence of chloride (Cl(-)) and nitrate (NO(3)(-)) on ClO(4)(-) uptake under controlled conditions. We examined three concentrations of ClO(4)(-), 40, 220, and 400 nmol(c)/L (nanomoles of charge per liter of solution), three concentrations of Cl(-), 2.5, 13.75, and 25 mmol(c)/L, and NO(3)(-) at 2, 11, and 20 mmol(c)/L. The results revealed that ClO(4)(-) was taken up the most when NO(3)(-) and Cl(-) were lowest in concentration in irrigation water. More ClO(4)(-) was detected in spinach leaves than that in the root tissue. Relative to lettuces, spinach accumulated more ClO(4)(-) in the plant tissue. Perchlorate was accumulated in spinach leaves more than reported for outer leaves of lettuce at 40 nmol(c)/L of ClO(4)(-) in irrigation water. The results also provided evidence that spinach selectively took up ClO(4)(-) relative to Cl(-). We developed a predictive model to describe the ClO(4)(-) concentration in spinach as related to the Cl(-), NO(3)(-), and ClO(4)(-) concentration in irrigation water.
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Affiliation(s)
- Wonsook Ha
- U.S. Salinity Laboratory, USDA-ARS, 450 W. Big Springs Rd., Riverside, California 92507, United States.
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16
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Wang Z, Lau BPY, Tague B, Sparling M, Forsyth D. Determination of perchlorate in infant formula by isotope dilution ion chromatography/tandem mass spectrometry. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2011; 28:799-806. [PMID: 21623505 PMCID: PMC3118528 DOI: 10.1080/19440049.2010.521959] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
A sensitive and selective isotope dilution ion chromatography/tandem mass spectrometry (ID IC-MS/MS) method was developed and validated for the determination of perchlorate in infant formula. The perchlorate was extracted from infant formula by using 20 ml of methanol and 5 ml of 1% acetic acid. All samples were spiked with (18)O(4) isotope-labelled perchlorate internal standard prior to extraction. After purification on a graphitised carbon solid-phase extraction column, the extracts were injected into an ion chromatography system equipped with an Ionpac AS20 column for separation of perchlorate from other anions. The presence of perchlorate in samples was quantified by isotope dilution mass spectrometry. Analysis of both perchlorate and its isotope-labelled internal standard was carried out on a Waters Quattro Ultima triple quadrupole mass spectrometer operating in a multiple reaction monitoring (MRM) negative ionisation mode. The method was validated for linearity and range, accuracy, precision, sensitivity, and matrix effects. The limit of quantification (LOQ) was 0.4 µg l(-1) for liquid infant formula and 0.95 µg kg(-1) for powdered infant formula. The recovery ranged from 94% to 110% with an average of 98%. This method was used to analyse 39 infant formula, and perchlorate concentrations ranging from <LOQ to 13.5 µg l(-1).
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Affiliation(s)
- Z Wang
- Food Research Division, Banting Research Center 2203D, Health Canada, Ottawa, Ontario, Canada
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Guruge KS, Wu Q, Kannan K. Occurrence and exposure assessment of perchlorate, iodide and nitrate ions from dairy milk and water in Japan and Sri Lanka. ACTA ACUST UNITED AC 2011; 13:2312-20. [PMID: 21738937 DOI: 10.1039/c1em10327j] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Perchlorate is known to competitively interfere with iodide uptake by the thyroid gland and thereby human exposure to perchlorate is a public health concern. Prevalence of perchlorate in dairy milk is documented; nevertheless, co-occurrence of perchlorate with other thyroid-binding monovalent ions such as iodide and nitrate is not well understood. In this study, we analyzed perchlorate, iodide, and nitrate-N in dairy milk, water and other dairy-related samples collected from Japan and Sri Lanka. Concentrations of perchlorate in Japanese dairy milk samples ranged from 1.03 to 14.1 ng ml(-1); the corresponding concentrations in dairy milk and powdered milk from Sri Lanka were 1.14-38.5 ng ml(-1). Perchlorate concentrations in commercial milk were significantly higher in Japan than in Sri Lanka, while iodide and nitrate levels in milk between the two countries were comparable. All three ions were ubiquitously found in water samples from Japan and Sri Lanka. Analysis of colostrum and raw milk collected from cows fed with the same feed for over 30 days showed no significant temporal variations in perchlorate, iodide and nitrate-N concentrations. A significant positive correlation was found between the concentrations of perchlorate and iodide in Japanese commercial milk. The concentrations of perchlorate and nitrate-N in water samples analyzed from both countries also showed a significant positive correlation. The exposure estimation revealed that dairy milk provides a greater source for perchlorate and iodide, while water predominantly contributes nitrate-N intake for all age groups in both counties. Infants and children demonstrated the highest estimated perchlorate, iodide and nitrate-N intake on a body weight basis in comparison to other age groups. Therefore, further studies of risk associated with perchlorate may need to reconsider co-existence of iodine and other iodide transport inhibitors in food.
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Affiliation(s)
- Keerthi S Guruge
- Safety Research Team, National Institute of Animal Health, National Agriculture and Food Research Organization, 3-1-5 Kannondai, Tsukuba, Ibaraki 305-0856, Japan.
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Sungur Ş, Sangün MK. Ion chromatographic determination of perchlorate in foods consumed in Hatay region. Food Chem 2011. [DOI: 10.1016/j.foodchem.2010.10.068] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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English P, Blount B, Wong M, Copan L, Olmedo L, Patton S, Haas R, Atencio R, Xu J, Valentin-Blasini L. Direct measurement of perchlorate exposure biomarkers in a highly exposed population: a pilot study. PLoS One 2011; 6:e17015. [PMID: 21394205 PMCID: PMC3048868 DOI: 10.1371/journal.pone.0017015] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Accepted: 01/18/2011] [Indexed: 11/19/2022] Open
Abstract
Exposure to perchlorate is ubiquitous in the United States and has been found to be widespread in food and drinking water. People living in the lower Colorado River region may have perchlorate exposure because of perchlorate in ground water and locally-grown produce. Relatively high doses of perchlorate can inhibit iodine uptake and impair thyroid function, and thus could impair neurological development in utero. We examined human exposures to perchlorate in the Imperial Valley among individuals consuming locally grown produce and compared perchlorate exposure doses to state and federal reference doses. We collected 24-hour urine specimen from a convenience sample of 31 individuals and measured urinary excretion rates of perchlorate, thiocyanate, nitrate, and iodide. In addition, drinking water and local produce were also sampled for perchlorate. All but two of the water samples tested negative for perchlorate. Perchlorate levels in 79 produce samples ranged from non-detect to 1816 ppb. Estimated perchlorate doses ranged from 0.02 to 0.51 µg/kg of body weight/day. Perchlorate dose increased with the number of servings of dairy products consumed and with estimated perchlorate levels in produce consumed. The geometric mean perchlorate dose was 70% higher than for the NHANES reference population. Our sample of 31 Imperial Valley residents had higher perchlorate dose levels compared with national reference ranges. Although none of our exposure estimates exceeded the U. S. EPA reference dose, three participants exceeded the acceptable daily dose as defined by bench mark dose methods used by the California Office of Environmental Health Hazard Assessment.
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Affiliation(s)
- Paul English
- California Environmental Health Tracking Program, California Department of Public Health, Richmond, California, United States of America.
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Gruber M, Nehring C, Creutzenberg M, Graf B, Hopf S. Perchlorate (Irenat®) may falsely lower measured ionised calcium. Clin Chem Lab Med 2011; 49:1019-24. [DOI: 10.1515/cclm.2011.160] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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21
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Blount BC, Alwis KU, Jain RB, Solomon BL, Morrow JC, Jackson WA. Perchlorate, nitrate, and iodide intake through tap water. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2010; 44:9564-9570. [PMID: 21090606 DOI: 10.1021/es1025195] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Perchlorate is ubiquitous in the environment, leading to human exposure and potential impact on thyroid function. Nitrate can also competitively inhibit iodide uptake at the sodium-iodide symporter and thus reduce thyroid hormone production. This study investigates the intake of perchlorate, nitrate, and iodide attributable to direct and indirect tap water consumption. The National Health and Nutrition Examination Survey collected tap water samples and consumption data from 3262 U.S. residents during the years 2005-2006. The median perchlorate, nitrate, and iodide levels measured in tap water were 1.16, 758, and 4.55 μg/L, respectively. Measured perchlorate levels were below the United States Environmental Protection Agency (U.S. EPA) drinking water equivalent level for perchlorate (24.5 μg/L). Significant correlations were found between iodide and nitrate levels (r = 0.17, p < 0.0001) and perchlorate and nitrate levels (r = 0.25, p < 0.0001). On the basis of 24 h recall, 47% of the study participants reported drinking tap water; 89% reported either direct or indirect consumption of tap water. For the adult population (age ≥ 20 yrs) the median tap water consumption rate was 11.6 mL/kg-day. Using individual tap water consumption data and body weight, we estimated the median perchlorate, nitrate, and iodide dose attributable to tap water as 9.11, 11300, and 43.3 ng/kg-day, respectively, for U.S. adults. This perchlorate exposure dose from tap water is relatively small compared to the total perchlorate exposure dose previously characterized for the U.S. adults (median 64 ng/kg-day) and the U.S. EPA reference dose (700 ng/kg-day).
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Affiliation(s)
- Benjamin C Blount
- Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway, Atlanta, Georgia 30341, United States.
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Jones-Lepp TL, Sanchez CA, Moy T, Kazemi R. Method development and application to determine potential plant uptake of antibiotics and other drugs in irrigated crop production systems. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:11568-11573. [PMID: 20964347 DOI: 10.1021/jf1028152] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Studies have shown the detection of emerging contaminants (ECs), of which pharmaceuticals are a subset, in surface waters across the United States. The objective of this study was to develop methods, and apply them, to evaluate the potential for food chain transfer when EC-containing waters are used for crop irrigation. Greenhouse experiments were performed in which select food crops were irrigated with water spiked with three antibiotics. Field experiments, at two different sites, were conducted. Select crops were irrigated with wastewater effluent known to contain ECs, EC-free well water, and Colorado River water containing trace-level ECs. The results of the greenhouse studies show the potential for uptake of one or more of the antibiotics evaluated, albeit at very low levels. In those food crops watered with wastewater effluent, only an industrial flavoring agent, N,N'-dimethylphenethylamine (DMPEA), was consistently found. None of the evaluated contaminants were found in crops irrigated with Colorado River water.
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Affiliation(s)
- Tammy L Jones-Lepp
- Research Chemist, Office of Research and Development, National Exposure Research Laboratory-Environmental Sciences Division, U.S. Environmental Protection Agency, Las Vegas, Nevada 89119, United States.
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Wu Q, Zhang T, Sun H, Kannan K. Perchlorate in tap water, groundwater, surface waters, and bottled water from China and its association with other inorganic anions and with disinfection byproducts. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2010; 58:543-550. [PMID: 20162260 DOI: 10.1007/s00244-010-9485-6] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Accepted: 01/28/2010] [Indexed: 05/27/2023]
Abstract
Perchlorate is a potent thyroid hormone-disrupting compound. Drinking water is one of the major sources of human exposure to perchlorate. Little is known about the occurrence of perchlorate in waters from China. In this study, water samples (n = 300) collected from 15 locations in 13 provinces and municipalities were analyzed for the presence of perchlorate. In addition, other inorganic anions that commonly occur in water--iodide, bromide, and nitrate--and the disinfection byproducts, bromate, chlorate, and chlorite were determined by high-performance liquid chromatography interfaced with tandem mass spectrometry. Perchlorate was detected in 86% of the samples analyzed, at concentrations ranging from <0.02 to 54.4 microg l(-1) (mean +/- SD 2.20 +/- 6.39 microg l(-1); median 0.62 microg l(-1)). Mean concentrations of perchlorate in tap water, groundwater, surface waters, and bottled water were 2.46, 3.04, 2.82, and 0.22 microg l(-1), respectively. Significant positive correlations were found between the concentrations of perchlorate and nitrate, perchlorate and chlorate, bromide and iodide, and nitrate and iodide.
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Affiliation(s)
- Qian Wu
- Wadsworth Center, New York State Department of Health, Albany, NY, USA
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Chen L, Chen H, Shen M, Zhou Z, Ma A. Analysis of perchlorate in milk powder and milk by hydrophilic interaction chromatography combined with tandem mass spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:3736-3740. [PMID: 20170169 DOI: 10.1021/jf903801m] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A simple, selective, and sensitive method using hydrophilic interaction chromatography combined with tandem mass spectrometry (HILIC-MS/MS) for quantifying perchlorate in milk powder and milk was developed. The analysis was conducted on an Inertsil HILIC column (150 mm x 3.0 mm, 3.5 mum) using a mobile phase consisting of methanol and 0.1% formic acid (60:40, v/v). The detection was performed by MS/MS via electrospray ionization. Linear calibration curves were obtained in the concentration range of 2.00 x 10(-2) to 8.00 microg/g and 4.00 x 10(-1) to 20.0 microg/L for perchlorate in milk powder and milk, respectively. The method detection limit was 4.00 x 10(-3) microg/g for milk powder and 8.00 x 10(-2) microg/L for milk. The recoveries of perchlorate in milk powder and milk were all >90%. This method was successfully applied to the quantitative determination of perchlorate in milk powder and milk.
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Affiliation(s)
- Lingyun Chen
- Hygiene Detection Center, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, RP China
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Otero-Santos SM, Delinsky AD, Valentin-Blasini L, Schiffer J, Blount BC. Analysis of Perchlorate in Dried Blood Spots Using Ion Chromatography and Tandem Mass Spectrometry. Anal Chem 2009; 81:1931-6. [DOI: 10.1021/ac802419n] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Samaret M. Otero-Santos
- Centers for Disease Control and Prevention, National Center for Environmental Health, Division of Laboratory Sciences, Atlanta, Georgia 30341
| | - Amy D. Delinsky
- Centers for Disease Control and Prevention, National Center for Environmental Health, Division of Laboratory Sciences, Atlanta, Georgia 30341
| | - Liza Valentin-Blasini
- Centers for Disease Control and Prevention, National Center for Environmental Health, Division of Laboratory Sciences, Atlanta, Georgia 30341
| | - Jarad Schiffer
- Centers for Disease Control and Prevention, National Center for Environmental Health, Division of Laboratory Sciences, Atlanta, Georgia 30341
| | - Benjamin C. Blount
- Centers for Disease Control and Prevention, National Center for Environmental Health, Division of Laboratory Sciences, Atlanta, Georgia 30341
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Blount BC, Ozpinar A, Alwis KU, Caudill SP, Gillespie JR. Perchlorate, nitrate, thiocyanate, and iodide levels in chicken feed, water, and eggs from three farms. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:10709-10715. [PMID: 18959414 DOI: 10.1021/jf8018326] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Perchlorate is an inhibitor of iodide uptake that is found widely in the environment. Given the potential for perchlorate accumulation during egg formation and the widespread consumption of eggs, it is important to examine eggs as a source of exposure to perchlorate and other potential inhibitors of iodide uptake (nitrate and thiocyanate). This study was conducted to determine potential human exposure to perchlorate from eggs produced by chicken flocks consuming differing amounts of perchlorate. The mean concentrations of perchlorate (7.16 ( 1.99 microg/kg of dry weight), nitrate (2820 ( 2100 microg/kg of dry weight), thiocyanate (574 +/- 433 microg/kg of dry weight), and iodide (2980 ( 1490 microg/kg of dry weight) in eggs (n = 180) from 15 chicken houses on 3 U.S. farms were determined. Chickens secreted into eggs an average of 23% of the perchlorate ingested from feed and water. Perchlorate levels in eggs were positively correlated with perchlorate intake (p < 0.001). Increased intake of perchlorate, nitrate, and thiocyanate was associated with decreased iodide levels in eggs, possibly indicating a competitive transport mechanism, such as sodium-iodide symporter. It was estimated that egg consumption contributes minimal perchlorate (approximately 0.040 microg) compared to the average total intake of approximately 10.5 microg for U.S. adults. Additionally, it was found that egg consumption was not associated with increased perchlorate exposure in 2820 individuals from the National Health and Nutrition Examination Survey (p value for the difference of least-squares means, pDiff = 0.225). From these findings it was concluded that, although chickens secrete perchlorate in eggs, eggs do not appear to be a significant source of perchlorate exposure for adults in the United States.
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Affiliation(s)
- Benjamin C Blount
- Division of Laboratory Sciences, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA.
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