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Calderón R, Jara C, Albornoz F, Palma P, Arancibia-Miranda N, Karthikraj R, Zhu H. Accumulation and distribution of perchlorate in spinach and chard growing under greenhouse: Implications for food safety in baby foods commodities. Food Chem 2022; 370:131101. [PMID: 34537427 DOI: 10.1016/j.foodchem.2021.131101] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 09/03/2021] [Accepted: 09/06/2021] [Indexed: 11/04/2022]
Abstract
Very little information is available with regards to the bioavailability of perchlorate in spinach or chard used in the production of baby foods commodities. In the present study, the uptake and accumulation of perchlorate were compared under two different treatments (T1: 1 and T2: 10 mg L-1 ClO4-). Our results indicate that spinach has a higher capacity to accumulate perchlorate than chard (p < 0.0185). Concentrations of perchlorate in leaves, stems and roots (leaves > stem > roots) all gradually increased (p < 0.0001) as vegetable growing and treatment (T2 > T1). No significant differences were found between the control and T1. The daily intake for perchlorate (control) is below the proposed international standard, however, it was exceeded in T1 and T2. The results suggested that perchlorate is actively accumulate in high concentrations in vegetables used in the production of baby food commodities and the exposure of perchlorate via the food consumption (baby foods) was evaluated as not safe.
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Affiliation(s)
- R Calderón
- Centro de Investigación en Recursos Naturales y Sustentabilidad, Universidad Bernardo O'Higgins, Fabrica 1990, Segundo Piso, Santiago, Chile.
| | - C Jara
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Ñuñoa, Santiago de Chile, Chile
| | - F Albornoz
- Departamento de Ciencias Vegetales, Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Macul, Santiago, Chile
| | - P Palma
- Laboratorio de Salud Pública, Ambiental y Laboral, Servicio Regional Ministerial, Ministerio de Salud, Región Metropolitana, Santiago, Chile
| | - N Arancibia-Miranda
- Facultad de Química and Biología, Universidad de Santiago de Chile, USACH, Casilla 40, C.P. 33, Santiago 9170022, Chile; Center for the Development of Nanoscience and Nanotechnology, CEDENNA, Santiago 9170124, Chile
| | - R Karthikraj
- Wadsworth Center, New York State Department of Health, Albany, NY 12201-0509, USA
| | - H Zhu
- Department of Pediatrics, New York University School of Medicine, New York, NY 10016, USA
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2
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Abstract
Perchlorate (ClO4−) is globally enriched in Martian regolith at levels commonly toxic to plants. Consequently, perchlorate in Martian regolith presents an obstacle to developing agriculture on Mars. Here, we assess the effect of perchlorate at different concentrations on plant growth and germination, as well as metal release in a simulated Gusev Crater regolith and generic potting soil. The presence of perchlorate was uniformly detrimental to plant growth regardless of growing medium. Plants in potting soil were able to germinate in 1 wt.% perchlorate; however, these plants showed restricted growth and decreased leaf area and biomass. Some plants were able to germinate in regolith simulant without perchlorate; however, they showed reduced growth. In Martian regolith simulant, the presence of perchlorate prevented germination across all plant treatments. Soil column flow-through experiments of perchlorate-containing Martian regolith simulant and potting soil were unable to completely remove perchlorate despite its high solubility. Additionally, perchlorate present in the simulant increased metal/phosphorous release, which may also affect plant growth and biochemistry. Our results support that perchlorate may modify metal availability to such an extent that, even with the successful removal of perchlorate, Martian regolith may continue to be toxic to plant life. Overall, our study demonstrates that the presence of perchlorate in Martian regolith provides a significant challenge in its use as an agricultural substrate and that further steps, such as restricted metal availability and nutrient enrichment, are necessary to make it a viable growing substrate.
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3
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A Review of Sample Analysis at Mars-Evolved Gas Analysis Laboratory Analog Work Supporting the Presence of Perchlorates and Chlorates in Gale Crater, Mars. MINERALS 2021. [DOI: 10.3390/min11050475] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The Sample Analysis at Mars (SAM) instrument on the Curiosity rover has detected evidence of oxychlorine compounds (i.e., perchlorates and chlorates) in Gale crater, which has implications for past habitability, diagenesis, aqueous processes, interpretation of in situ organic analyses, understanding the martian chlorine cycle, and hazards and resources for future human exploration. Pure oxychlorines and mixtures of oxychlorines with Mars-analog phases have been analyzed for their oxygen (O2) and hydrogen chloride (HCl) releases on SAM laboratory analog instruments in order to constrain which phases are present in Gale crater. These studies demonstrated that oxychlorines evolve O2 releases with peaks between ~200 and 600 °C, although the thermal decomposition temperatures and the amount of evolved O2 decrease when iron phases are present in the sample. Mg and Fe oxychlorines decompose into oxides and release HCl between ~200 and 542 °C. Ca, Na, and K oxychlorines thermally decompose into chlorides and do not evolve HCl by themselves. However, the chlorides (original or from oxychlorine decomposition) can react with water-evolving phases (e.g., phyllosilicates) in the sample and evolve HCl within the temperature range of SAM (<~870 °C). These laboratory analog studies support that the SAM detection of oxychlorine phases is consistent with the presence of Mg, Ca, Na, and K perchlorate and/or chlorate along with possible contributions from adsorbed oxychlorines in Gale crater samples.
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Liang Y, Zhou L, Zhang X, Yu H, Guo M, Yu J, Wang X, Yang M, Lou Z, Luo F, Sun H, Chen Z. Uptake, Accumulation, Translocation, and Subcellular Distribution of Perchlorate in Tea ( Camellia sinensis L.) Plants. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:4655-4662. [PMID: 33858141 DOI: 10.1021/acs.jafc.1c01270] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Perchlorate, emerging pollution with thyroid toxicity, has a high detection rate in fresh tea leaves. What needs attention is that the uptake characteristic is insufficiently understood. Herein, the uptake, accumulation, and translocation of perchlorate in a tea plant-hydroponic solution system were investigated, of which the mechanism was further lucubrated by subcellular distribution. The perchlorate concentration in tea tissues is ramped up along with the increase in the exposure level and time. The bioaccumulation factor of tea tissues followed the rank: mature leaves > tender leaves > roots. After the seedlings have been transplanted to a perchlorate-free solution, the perchlorate in mature leaves is reduced significantly, accompanied by a progressive increase in perchlorate in new shoots and solutions. The cell-soluble fractions are the major reservoir of perchlorate both for roots (>59%) and leaves (>76%), which precisely explained the translocation within the tea plant-hydroponic solution system. These results not only illuminate the uptake characteristic in tea plants but also improve the understanding of the behavior of perchlorate in higher plants.
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Affiliation(s)
- Yabo Liang
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Li Zhou
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture and Rural Affairs, Hangzhou 310008, China
| | - Xinzhong Zhang
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture and Rural Affairs, Hangzhou 310008, China
| | - Huan Yu
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Mingming Guo
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jiawei Yu
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Xinru Wang
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture and Rural Affairs, Hangzhou 310008, China
| | - Mei Yang
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture and Rural Affairs, Hangzhou 310008, China
| | - Zhengyun Lou
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture and Rural Affairs, Hangzhou 310008, China
| | - Fengjian Luo
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture and Rural Affairs, Hangzhou 310008, China
| | - Hezhi Sun
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture and Rural Affairs, Hangzhou 310008, China
| | - Zongmao Chen
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture and Rural Affairs, Hangzhou 310008, China
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5
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Combined effects of ultrasound and aqueous chlorine dioxide treatments on nitrate content during storage and postharvest storage quality of spinach (Spinacia oleracea L.). Food Chem 2020; 333:127500. [PMID: 32693317 DOI: 10.1016/j.foodchem.2020.127500] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 07/02/2020] [Accepted: 07/03/2020] [Indexed: 12/28/2022]
Abstract
The objectives of this study were to optimize the condition of ultrasonic treatment combined with aqueous chlorine dioxide (ClO2) on nitrate content of spinach by response surface methodology (RSM), and determine the effectiveness of ultrasound (US) and ClO2 alone and in combination, on spinach postharvest quality during 7 days' storage period. The optimal treatment parameters obtained were ultrasonic power (300 W), ClO2 concentration (50 ppm), treatment time (4 min). The combined treatments significantly reduced the nitrate content and maintained better storage quality in terms of total soluble solids (TSS) and ascorbic acid content compared with the individual treatment or untreated. For Chlorophyll content, the combined treatment was significantly higher than the control and ClO2 treatment, but lower than ultrasonic treatment. The results demonstrated that US combined with ClO2 are promising alternatives for the reduction of nitrate content, as well as preserving the quality of stored leafy vegetables.
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Calderon R, Rajendiran K, U J K, Palma P, Arancibia-Miranda N, Silva-Moreno E, Corradini F. Sources and fates of perchlorate in soils in Chile: A case study of perchlorate dynamics in soil-crop systems using lettuce (Lactuca sativa) fields. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 264:114682. [PMID: 32380400 DOI: 10.1016/j.envpol.2020.114682] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 04/24/2020] [Accepted: 04/25/2020] [Indexed: 06/11/2023]
Abstract
Perchlorate occurs naturally in the environment in deposits of nitrate and can be formed in the atmosphere and precipitate into soil. However, little is known about the occurrence and levels of perchlorate in soils and fertilizers in Chile and its impacts on agricultural systems and food safety. In this study, concentrations of perchlorate were determined in 101 surface soils and 17 fertilizers [nitrogenous (n = 8), nitrogen-phosphorous-potassium (NPK; n = 3), phosphate (n = 2) and non-nitrogenous (n = 4)] collected across Chile from 2017 to 2018. Our results show that perchlorate was detected mainly in agricultural soils (mean: 0.32 ng g-1), grassland rotation sites (0.41 ngg-1) and urban locations (0.38 ng g-1). Interestingly, elevated concentrations of perchlorate (9.66 and 54.0 ng g-1) were found in agricultural soils. All fertilizers contained perchlorate: nitrogenous fertilizers (mean: 32.6 mg kg-1), NPK (mean: 12.6 mg kg-1), non-nitrogenous fertilizers (mean: 10.2 mg kg-1) and phosphates (mean: 11.5 mg kg-1). Only one type of nitrogenous fertilizer (KNO3: 95.3 mg kg-1) exceeded the international regulation limit (50 mg kg-1). For two agronomic practices, the content of perchlorate in lettuce increased as the fertilizer application rate increased, with fertigation promoting a more significant accumulation. However, the concentrations generally remained below regulatory values. Our results suggest that fertilizers constitute an important source of perchlorate in soils.
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Affiliation(s)
- R Calderon
- Centro de Investigación en Recursos Naturales y Sustentabilidad, Universidad Bernardo O'Higgins, Fabrica, 1990, Segundo Piso, Santiago, Chile; Instituto de Investigaciones Agropecuarias, INIA La Platina, Santa Rosa, 11610, Santiago, Chile.
| | - Karthikraj Rajendiran
- Wadsworth Center, New York State Department of Health, Empire State Plaza, P.O. Box 509, Albany, NY, 12201-0509, United States
| | - Kim U J
- Wadsworth Center, New York State Department of Health, Empire State Plaza, P.O. Box 509, Albany, NY, 12201-0509, United States; Department of Earth & Environmental Sciences, University of Texas at Arlington, 500 Yates Street, Arlington, TX, 76019, United States
| | - P Palma
- Laboratorio de Salud Pública, Ambiental y Laboral, Servicio Regional Ministerial, Ministerio de Salud, Región Metropolitana, Santiago, Chile
| | - N Arancibia-Miranda
- Facultad de Química and Biología, Universidad de Santiago de Chile, USACH, Casilla 40, C.P. 33, Santiago, 9170022, Chile; Center for the Development of Nanoscience and Nanotechnology, CEDENNA, Santiago, 9170124, Chile
| | - E Silva-Moreno
- Instituto de Ciencias Biomédicas, Universidad Autónoma de Chile, Chile; Instituto de Investigaciones Agropecuarias, INIA La Platina, Santa Rosa, 11610, Santiago, Chile
| | - F Corradini
- Soil Physics and Land Management Group, Wageningen University & Research, Droevendaalsesteeg 3, 6708PB Wageningen, the Netherlands; Instituto de Investigaciones Agropecuarias, INIA La Platina, Santa Rosa, 11610, Santiago, Chile
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7
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Calderón R, Palma P, Eltit K, Arancibia-Miranda N, Silva-Moreno E, Yu W. Field study on the uptake, accumulation and risk assessment of perchlorate in a soil-chard/spinach system: Impact of agronomic practices and fertilization. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 719:137411. [PMID: 32145491 DOI: 10.1016/j.scitotenv.2020.137411] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 02/13/2020] [Accepted: 02/16/2020] [Indexed: 06/10/2023]
Abstract
The application of excessive fertilizer represents a primary source of entry for perchlorate into crop systems and thus has raised widespread concern regarding food safety. Several studies have reported the occurrence of perchlorate in vegetables. However, limited information is available on the fate of perchlorate in the soil-plant system. In this study, we performed field experiments to evaluate the effects of the application rate of Chilean nitrate fertilizer and the type of fertilization (manual or fertigation) on the uptake of perchlorate by plants grown in open fields. Interestingly, in the control, chard and spinach accumulated 21.3 and 25.9 μg kg-1, respectively. For both agronomic practices, the content of perchlorate in chard and spinach increased as the fertilizer application rate increased, with fertigation promoting more significant accumulations. Spinach accumulated almost two times more perchlorate than chard for all treatments; however, the concentrations generally remained below regulatory values. The intake of spinach and chard presented a low risk to human health for all age groups. These findings enhance our understanding of the environmental impact of the use of fertilizers in agriculture and food safety.
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Affiliation(s)
- R Calderón
- Centro de Investigación en Recursos Naturales y Sustentabilidad, Universidad Bernardo O'Higgins, Fabrica 1990, Segundo Piso, Santiago, Chile.
| | - P Palma
- Laboratorio de Salud Pública, Ambiental y Laboral, Servicio Regional Ministerial, Ministerio de Salud, Región Metropolitana, Santiago, Chile
| | - K Eltit
- Facultad de Ingeniería, Departamento de Ingeniería Geográfica, Universidad de Santiago de Chile, Av. Libertador B. O'Higgins 3363, Santiago, Chile
| | - N Arancibia-Miranda
- Facultad de Química and Biología, Universidad de Santiago de Chile, USACH, Casilla 40, C.P. 33, Santiago 9170022, Chile; Center for the Development of Nanoscience and Nanotechnology, CEDENNA, Santiago 9170124, Chile
| | - E Silva-Moreno
- Instituto de Ciencias Biomédicas, Universidad Autónoma de Chile, Chile
| | - W Yu
- Facultad de Química and Biología, Universidad de Santiago de Chile, USACH, Casilla 40, C.P. 33, Santiago 9170022, Chile; Wadsworth Center, New York State Department of Health, and Department of Environmental Health Sciences, School of Public Health, State University of New York at Albany, New York 12201-0509, United States
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8
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Vejdovszky K, Grossgut R, Unterluggauer H, Inreiter N, Steinwider J. Risk assessment of dietary exposure to perchlorate for the Austrian population. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2018; 35:623-631. [DOI: 10.1080/19440049.2018.1426889] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Katharina Vejdovszky
- Department of Risk Assessment, Division of Integrative Risk Assessment, Data & Statistics, Austrian Agency for Health and Food Safety (AGES), Vienna, Austria
| | - Roland Grossgut
- Department of Risk Assessment, Division of Integrative Risk Assessment, Data & Statistics, Austrian Agency for Health and Food Safety (AGES), Vienna, Austria
| | - Hermann Unterluggauer
- Institute for Food Safety Innsbruck, Division of Food Safety, Austrian Agency for Health and Food Safety (AGES), Innsbruck, Austria
| | - Norbert Inreiter
- Institute for Hydro Analytics Linz, Division of Health, Austrian Agency for Health and Food Safety (AGES), Linz, Austria
| | - Johann Steinwider
- Department of Risk Assessment, Division of Integrative Risk Assessment, Data & Statistics, Austrian Agency for Health and Food Safety (AGES), Vienna, Austria
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9
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Vijaya Nadaraja A, Pushpangadhan Saraswathy D, Cheruvathery Ravindran S, Mariya A, Godwin Russel J, Selvanesan P, Pereira B, Bhaskaran K. Spatio-temporal distribution of perchlorate and its toxicity in Hydrilla verticillata. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 144:490-497. [PMID: 28668764 DOI: 10.1016/j.ecoenv.2017.06.053] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 06/19/2017] [Accepted: 06/20/2017] [Indexed: 06/07/2023]
Abstract
The spatio-temporal distribution of perchlorate in water sources around an ammonium perchlorate production unit and its toxicity response on a dominant aquatic plant, Hydrilla verticillata are reported in this study. Samples (n=453) from ground water (open well) and surface water sources within 5km from the production unit over a period of 12 months (2014, June - 2015, May) were screened for ClO4-. During the period, ClO4-concentration in ground water samples close to the production unit increased to >40,000μg/L, and ClO4- was detected at 1740μg/L in well water 1.6km away from the production unit. A community pond in the area also showed an increase in ClO4- level up to 29,000μg/L. In all water sources, ClO4- level was maximum during the rainy season (July, monsoon). A natural degradation of ClO4- was not observed in the area as evident from its persistent level and spreading to more areas. H. verticillata, the dominant vegetation in the pond exhibited severe toxic response like massive decay and loss of photosynthetic pigments such as chlorophyll and carotene due to ClO4- exposure. The plant accumulated ClO4- up to 60±0.8mg/kg wet weight with a Bio-Concentration Factor 2.06±0.005. This is the first report on spatio-temporal distribution of ClO4- at higher levels in a natural environment and its toxicity response to plants under natural condition.
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Affiliation(s)
| | | | | | - Anie Mariya
- Environmental Technology, CSIR-NIIST, Thiruvananthapuram-19, India
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10
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Estrada NL, Böhlke JK, Sturchio NC, Gu B, Harvey G, Burkey KO, Grantz DA, McGrath MT, Anderson TA, Rao B, Sevanthi R, Hatzinger PB, Jackson WA. Stable isotopic composition of perchlorate and nitrate accumulated in plants: Hydroponic experiments and field data. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 595:556-566. [PMID: 28399495 DOI: 10.1016/j.scitotenv.2017.03.223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 03/22/2017] [Accepted: 03/24/2017] [Indexed: 06/07/2023]
Abstract
Natural perchlorate (ClO4-) in soil and groundwater exhibits a wide range in stable isotopic compositions (δ37Cl, δ18O, and Δ17O), indicating that ClO4- may be formed through more than one pathway and/or undergoes post-depositional isotopic alteration. Plants are known to accumulate ClO4-, but little is known about their ability to alter its isotopic composition. We examined the potential for plants to alter the isotopic composition of ClO4- in hydroponic and field experiments conducted with snap beans (Phaseolus vulgaris L.). In hydroponic studies, anion ratios indicated that ClO4- was transported from solutions into plants similarly to NO3- but preferentially to Cl- (4-fold). The ClO4- isotopic compositions of initial ClO4- reagents, final growth solutions, and aqueous extracts from plant tissues were essentially indistinguishable, indicating no significant isotope effects during ClO4- uptake or accumulation. The ClO4- isotopic composition of field-grown snap beans was also consistent with that of ClO4- in varying proportions from irrigation water and precipitation. NO3- uptake had little or no effect on NO3- isotopic compositions in hydroponic solutions. However, a large fractionation effect with an apparent ε (15N/18O) ratio of 1.05 was observed between NO3- in hydroponic solutions and leaf extracts, consistent with partial NO3- reduction during assimilation within plant tissue. We also explored the feasibility of evaluating sources of ClO4- in commercial produce, as illustrated by spinach, for which the ClO4- isotopic composition was similar to that of indigenous natural ClO4-. Our results indicate that some types of plants can accumulate and (presumably) release ClO4- to soil and groundwater without altering its isotopic characteristics. Concentrations and isotopic compositions of ClO4- and NO3- in plants may be useful for determining sources of fertilizers and sources of ClO4- in their growth environments and consequently in food supplies.
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Affiliation(s)
- Nubia Luz Estrada
- Department of Civil, Environmental, and Construction Engineering, Texas Tech University, Lubbock, TX 79409-1023, USA
| | - J K Böhlke
- National Research Program, U.S. Geological Survey, Reston, VA 20192, USA
| | - Neil C Sturchio
- Department of Geological Sciences, University of Delaware, Newark, DE 19716, USA
| | - Baohua Gu
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Greg Harvey
- U.S. Air Force, ASC/ENVR, Wright-Patterson AFB, OH 45433, USA
| | - Kent O Burkey
- U.S.D.A. - A.R.S., Plant Sciences Research Unit, North Carolina State University, Raleigh, NC 27607, USA
| | - David A Grantz
- Department of Botany and Plant Sciences, University of California, Riverside, Kearney Agricultural Center, Parlier, CA 93648, USA
| | - Margaret T McGrath
- Plant Pathology & Plant-Microbe Biology Section, SIPS, Cornell University, Long Island Horticultural Research and Extension Center, Riverhead, NY 11901, USA
| | - Todd A Anderson
- Department of Environmental Toxicology, The Institute of Environmental and Human Health (TIEHH), Lubbock, TX 79409-1163, USA
| | - Balaji Rao
- Department of Civil, Environmental, and Construction Engineering, Texas Tech University, Lubbock, TX 79409-1023, USA
| | - Ritesh Sevanthi
- Department of Civil, Environmental, and Construction Engineering, Texas Tech University, Lubbock, TX 79409-1023, USA
| | | | - W Andrew Jackson
- Department of Civil, Environmental, and Construction Engineering, Texas Tech University, Lubbock, TX 79409-1023, USA.
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11
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Song W, Gao B, Wang H, Xu X, Xue M, Zha M, Gong B. The rapid adsorption-microbial reduction of perchlorate from aqueous solution by novel amine-crosslinked magnetic biopolymer resin. BIORESOURCE TECHNOLOGY 2017; 240:68-76. [PMID: 28341379 DOI: 10.1016/j.biortech.2017.03.064] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 03/07/2017] [Accepted: 03/08/2017] [Indexed: 06/06/2023]
Abstract
The aim of this work was to study the adsorption characters of resin, microbial reduction of perchlorate and combined process of perchlorate removal in aqueous solution. Study demonstrated the adsorption equilibrium was achieved in 120min, which based on ion exchange reaction. Dissolved perchlorate (100mg/L) can be completely removed by acclimated anaerobic sludge in 15h, and the concentrated perchlorate (∼200mg/g) on the surface of resin would be effectively microbial reduced after 3days. Neutral environment (pH=7.4), higher biomass and additional electron donor can apparently improve the biological reduction efficiency of concentrated perchlorate. Addition of many co-anions showed the competition adsorption towards perchlorate, especially in the presence of NO3-. This study provides an effective method for perchlorate reduction by the adsorption-microbial process.
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Affiliation(s)
- Wen Song
- Key Laboratory of Water Pollution Control and Recycling (Shandong), School of Environmental Science and Engineering, Shandong University, Jinan 250100, PR China
| | - Baoyu Gao
- Key Laboratory of Water Pollution Control and Recycling (Shandong), School of Environmental Science and Engineering, Shandong University, Jinan 250100, PR China.
| | - Hailan Wang
- Key Laboratory of Water Pollution Control and Recycling (Shandong), School of Environmental Science and Engineering, Shandong University, Jinan 250100, PR China
| | - Xing Xu
- Key Laboratory of Water Pollution Control and Recycling (Shandong), School of Environmental Science and Engineering, Shandong University, Jinan 250100, PR China.
| | - Moxi Xue
- Key Laboratory of Water Pollution Control and Recycling (Shandong), School of Environmental Science and Engineering, Shandong University, Jinan 250100, PR China
| | - Minchao Zha
- Key Laboratory of Water Pollution Control and Recycling (Shandong), School of Environmental Science and Engineering, Shandong University, Jinan 250100, PR China
| | - Bo Gong
- Key Laboratory of Water Pollution Control and Recycling (Shandong), School of Environmental Science and Engineering, Shandong University, Jinan 250100, PR China
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12
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Calderón R, Godoy F, Escudey M, Palma P. A review of perchlorate (ClO 4-) occurrence in fruits and vegetables. ENVIRONMENTAL MONITORING AND ASSESSMENT 2017; 189:82. [PMID: 28130763 DOI: 10.1007/s10661-017-5793-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 01/16/2017] [Indexed: 06/06/2023]
Abstract
Since the 1990s, a large number of studies around the world have reported the presence of perchlorate in different types of environmental matrices. In view of their inherent characteristics, such as high solubility, mobility, persistence, and low affinity for the surface of soil, perchlorates are mobilized through the water-soil system and accumulate in edible plant species of high human consumption. However, the ingestion of food products containing perchlorate represents a potential health risk to people due to their adverse effects on thyroid, hormone, and neuronal development, mainly in infants and fetuses. At present, research has been centered on determining sources, fates, and remediation methods and not on its real extension in vegetables under farming conditions. This review presents a comprehensive overview and update of the frequent detection of perchlorate in fruits and vegetables produced and marketed around the world. Additionally, the impact of fertilizer on the potential addition of perchlorate to soil and its mobility in the water-soil-plant system is discussed. This review is organized into the following sections: sources of perchlorate, mobility in the water-soil system, presence in fruits and vegetables in different countries, international regulations, and toxicological studies. Finally, recommendations for future studies concerning perchlorate in fruits and vegetables are presented.
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Affiliation(s)
- R Calderón
- Instituto de Investigaciones Agropecuarias, INIA La Platina, Santa Rosa, 11610, La Pintana, Santiago, Chile.
- Centro de Investigación en Recursos Naturales y Sustentabilidad, Universidad Bernardo O'Higgins, Fabrica 1990, segundo piso, Santiago, Chile.
| | - F Godoy
- Centro i-mar, Universidad de los Lagos, Camino Chinquihue Km 6, Casilla 557, Puerto Montt, Chile
| | - M Escudey
- Facultad de Química and Biología, Universidad de Santiago de Chile, Av. B. O'Higgins 3363, C 40-33, 7254758, Santiago, Chile
- Center for the Development of Nanoscience and Nanotechnology, CEDENNA, 9170124, Santiago, Chile
| | - P Palma
- Laboratorio de Salu Pública, Ambiental y Laboral, SEREMI de Salud Región Metropolitana, San Diego 630, piso 8, Santiago, Chile
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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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Erdemgil Y, Gözet T, Can Ö, Ünsal İ, Özpınar A. Perchlorate levels found in tap water collected from several cities in Turkey. ENVIRONMENTAL MONITORING AND ASSESSMENT 2016; 188:158. [PMID: 26869048 DOI: 10.1007/s10661-016-5161-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 02/03/2016] [Indexed: 06/05/2023]
Abstract
Perchlorate is an inorganic anion that inhibits iodide transport to the thyroid by sodium-iodide transporters. Because perchlorate is highly soluble, stable, and mobile in water, drinking water is a potential source of perchlorate exposure. When exposed to perchlorate, thyroid dysfunction can be observed in sensitive populations (pregnant woman, infants, and children), especially those with iodide deficiency. The aim of this study was to determine the perchlorate levels in tap water from five cities in Turkey. Perchlorate concentrations of 145 tap water samples collected from Ankara, Isparta, Istanbul, Kayseri, and Sakarya were determined by liquid chromatography-tandem mass spectrometry. Mean and median values were found to be 0.15 and 0.07 μg/L, respectively. The median values (25-75 % percentile) of Istanbul, Ankara, Sakarya, Isparta, and Kayseri were 0.08 μg/L (0.04-0.09 μg/L), 0.07 μg/L (0.07-0.21 μg/L), 0.04 μg/L (0.04-0.04 μg/L), 0.03 μg/L (0.02-0.07 μg/L), and 0.25 μg/L (0.23-0.31 μg/L), respectively. The median perchlorate level observed in Kayseri was significantly higher than those found at other cities (p < 0.05). Perchlorate concentrations in water samples were lower than the interim drinking water health advisory level (15 μg/L) determined by the US Environmental Protection Agency. This study showed that perchlorate in drinking water is not the main source of exposure in these cities. Future studies should be performed to determine perchlorate levels in other potential sources, such as food products.
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Affiliation(s)
- Yiğit Erdemgil
- School of Medicine, Department of Medical Biochemistry, Acibadem University, Istanbul, Turkey
| | - Tuba Gözet
- School of Medicine, Department of Medical Biochemistry, Acibadem University, Istanbul, Turkey
| | - Özge Can
- School of Medical Engineering, Acibadem University, Istanbul, Turkey
| | - İbrahim Ünsal
- School of Medicine, Department of Medical Biochemistry, Acibadem University, Istanbul, Turkey
| | - Aysel Özpınar
- School of Medicine, Department of Medical Biochemistry, Acibadem University, Istanbul, Turkey.
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Dannehl D, Schuch I, Gao Y, Cordiner S, Schmidt U. Effects of hypochlorite as a disinfectant for hydroponic systems on accumulations of chlorate and phytochemical compounds in tomatoes. Eur Food Res Technol 2015. [DOI: 10.1007/s00217-015-2544-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Calderón R, Palma P, Parker D, Escudey M. Capture and accumulation of perchlorate in lettuce. Effect of genotype, temperature, perchlorate concentration, and competition with anions. CHEMOSPHERE 2014; 111:195-200. [PMID: 24997918 DOI: 10.1016/j.chemosphere.2014.03.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 03/07/2014] [Accepted: 03/15/2014] [Indexed: 06/03/2023]
Abstract
Various studies have evaluated the accumulation of ClO4(-) in lettuce (Lactuca sativa), but very few have dealt with the variables that can interfere with its capture. The present study evaluates the transfer of ClO4(-) in two L. sativa varieties: butter head (L. sativa var. capitata) and cos lettuce (L. sativa var. crispa) under hydroponic conditions. The ClO4(-) concentrations used correspond to levels (1 and 2mgL(-1)), measured in irrigation water in the Iquique region in the north of Chile. Results indicate that the capture of ClO4(-) is dependent on its concentration, lettuce genotype, and temperature. The butter head variety accumulates the highest perchlorate concentrations. Anion competition involving NO3(-) (16 and 48mM), Cl(-) (23 and 56mM), and SO4(2-) (10 and 20mM) was evaluated, being NO3(-) (48mM), the most significant competition reducing the concentration of ClO4(-) in tissues of L. sativa varieties.
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Affiliation(s)
- Raúl Calderón
- Escuela de Ciencias Ambientales, Facultad de Recursos Naturales, Universidad Católica de Temuco, Casilla 15-D, Temuco, Chile.
| | - Paulina Palma
- Laboratorio Sanitario Ambiental, SEREMI de Salud Región Metropolitana, San Diego 630 piso 8, Santiago, Chile
| | - David Parker
- Soil and Water Science Section, Department of Environmental Sciences, University of California, Riverside, CA 92521, United States
| | - Mauricio Escudey
- Universidad de Santiago de Chile, Facultad de Química y Biología, Av. B. O'Higgins 3363, C 40-33, 7254758 Santiago, Chile; Center for the Development of Nanoscience and Nanotechnology, CEDENNA, 9170124 Santiago, Chile
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Predictive role of nontumoral sodium iodide symporter activity and preoperative thyroid characteristics in remission process of thyroid cancer patients. Ann Nucl Med 2014; 28:623-31. [DOI: 10.1007/s12149-014-0854-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 04/28/2014] [Indexed: 10/25/2022]
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Ozpinar A, Kelestimur F, Songur Y, Can O, Valentin L, Caldwell K, Arikan E, Unsal I, Serteser M, Inal T, Erdemgil Y, Coskun A, Bakirci N, Sezgin O, Blount B. Iodine status in Turkish populations and exposure to iodide uptake inhibitors. PLoS One 2014; 9:e88206. [PMID: 24505430 PMCID: PMC3914924 DOI: 10.1371/journal.pone.0088206] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Accepted: 01/10/2014] [Indexed: 11/18/2022] Open
Abstract
Perchlorate, nitrate, and thiocyanate are competitive inhibitors of the sodium iodide symporter of the thyroid membrane. These inhibitors can decrease iodine uptake by the symporter into the thyroid gland and may disrupt thyroid function. This study assesses iodine status and exposure to iodide uptake inhibitors of non-pregnant and non-lactating adult women living in three different cities in Turkey (Istanbul, Isparta and Kayseri). We measured iodine and iodide uptake inhibitors in 24-hr urines collected from study participants (N = 255). All three study populations were mildly iodine deficient, with median urinary iodine (UI) levels of 77.5 µg/L in Istanbul, 58.8 µg/L in Isparta, and 69.8 µg/L in Kayseri. Perchlorate doses were higher in the study population (median 0.13 µg/kg/day), compared with a reference population (median 0.059 µg/kg/day), but lower than the U.S. EPA reference dose (0.7 µg/kg/day). Urinary thiocyanate levels increased with increasing exposure to tobacco smoke, with non-smokers (268 µg/L) significantly lower than light smokers (1110 µg/L), who were significantly lower than heavy smokers (2410 µg/L). This pilot study provides novel data indicating that study participants were moderately iodine deficient and had higher intakes of the iodide uptake inhibitor perchlorate compared with a reference population. Further investigation is needed to characterize the thyroid impact resulting from iodine deficiency coupled with exposure to iodide uptake inhibitors such as perchlorate, thiocyanate and nitrate.
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Affiliation(s)
- Aysel Ozpinar
- Department of Medical Biochemistry, School of Medicine, Acibadem University, Istanbul, Turkey
| | | | - Yildiran Songur
- School of Medicine, Suleyman Demirel University, Isparta, Turkey
| | - Ozge Can
- Department of Medical Biochemistry, School of Medicine, Acibadem University, Istanbul, Turkey
| | - Liza Valentin
- Division of Laboratory Sciences, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Kathleen Caldwell
- Division of Laboratory Sciences, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | | | - Ibrahim Unsal
- Department of Medical Biochemistry, School of Medicine, Acibadem University, Istanbul, Turkey
| | - Mustafa Serteser
- Department of Medical Biochemistry, School of Medicine, Acibadem University, Istanbul, Turkey
| | - Tamer Inal
- Department of Medical Biochemistry, School of Medicine, Acibadem University, Istanbul, Turkey
| | - Yigit Erdemgil
- Department of Medical Biochemistry, School of Medicine, Acibadem University, Istanbul, Turkey
| | - Abdurrahman Coskun
- Department of Medical Biochemistry, School of Medicine, Acibadem University, Istanbul, Turkey
| | - Nadi Bakirci
- Department of Medical Biochemistry, School of Medicine, Acibadem University, Istanbul, Turkey
| | - Ozlem Sezgin
- Department of Medical Biochemistry, School of Medicine, Acibadem University, Istanbul, Turkey
- Acibadem Hospital, Istanbul, Turkey
| | - Ben Blount
- Division of Laboratory Sciences, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
- * E-mail:
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Bhaskaran K, Vijaya Nadaraja A, Tumbath S, Babu Shah L, Gangadharan Puthiya Veetil P. Phytoremediation of perchlorate by free floating macrophytes. JOURNAL OF HAZARDOUS MATERIALS 2013; 260:901-906. [PMID: 23872336 DOI: 10.1016/j.jhazmat.2013.06.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Revised: 05/31/2013] [Accepted: 06/03/2013] [Indexed: 06/02/2023]
Abstract
Phytoremediation of perchlorate by free floating macrophytes (Eichornia, Pistia, Salvinia and Lemna) was evaluated in this study. Among the plants tested, Pistia showed 63.8 ± 4% (w/v) removal of 5 mg/L level perchlorate in 7 days, whereas the removal was absent in other plants. Phyto-accumulation (18.2%) and rhizo-degradation (45.68%) were identified as the mechanisms involved in perchlorate removal in Pistia. Whole plant extraction yielded 45.4 μg perchlorate/g dry weight biomass in 7 days period. High intensity of light and presence of nitrate negatively affected perchlorate removal by Pistia. An enrichment of Pistia root homogenate exhibited faster reduction of perchlorate where 100mg/L of the compound was reduced completely in 48 h under anoxic condition. A novel perchlorate reducing bacterium, isolated from Pistia root homogenate enrichment was identified as Acinetobacter sp. NIIST (Genbank JX467695).
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Affiliation(s)
- Krishnakumar Bhaskaran
- Environmental Technology, National Institute for Interdisciplinary Science & Technology (CSIR-India), Industrial Estate (PO), Thiruvananthapuram-19, India.
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Furin CG, von Hippel FA, Hagedorn B, O’Hara TM. Perchlorate trophic transfer increases tissue concentrations above ambient water exposure alone in a predatory fish. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2013; 76:1072-1084. [PMID: 24188192 PMCID: PMC3839789 DOI: 10.1080/15287394.2013.836693] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This study examined effects of varying concentrations of the environmental contaminant perchlorate in northern pike (Esox lucius) based on exposure in water and/or from prey (threespine stickleback, Gasterosteus aculeatus). Routes of exposure to pike were through contaminated water at 0, 10, or 100 mg/L perchlorate for 49 d and/or through feeding, 1 per day over 14 d, sticklebacks that were previously maintained in water at 0, 10, or 100 mg/L perchlorate. Both water and food significantly contributed to pike tissue concentrations of perchlorate as compared to controls, but, as expected for a water-soluble contaminant, perchlorate did not biomagnify from prey to predatory fish. Pike gastrointestinal tissue retained significantly more perchlorate than other tissues combined. Route of exposure and concentration of perchlorate in various media are important to consider in risk assessment when evaluating uptake and tissue concentration of perchlorate because significantly higher tissue concentrations may result from combined prey and water exposures than from prey or water exposures alone in a concentration-dependent manner.
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Affiliation(s)
- Christoff G. Furin
- Department of Biological Sciences, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, Alaska, 99508, USA
- Institute of Arctic Biology and Department of Biology and Wildlife, University of Alaska Fairbanks, P.O. Box 757000, Fairbanks, Alaska, 99775, USA
| | - Frank A. von Hippel
- Department of Biological Sciences, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, Alaska, 99508, USA
| | - Birgit Hagedorn
- Environmental and Natural Resources Institute, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, Alaska, 99508,USA
| | - Todd M. O’Hara
- Institute of Arctic Biology and Department of Biology and Wildlife, University of Alaska Fairbanks, P.O. Box 757000, Fairbanks, Alaska, 99775, USA
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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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