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Caggìa V, Wälchli J, Deslandes-Hérold G, Mateo P, Robert CAM, Guan H, Bigalke M, Spielvogel S, Mestrot A, Schlaeppi K, Erb M. Root-exuded specialized metabolites reduce arsenic toxicity in maize. Proc Natl Acad Sci U S A 2024; 121:e2314261121. [PMID: 38513094 PMCID: PMC10990099 DOI: 10.1073/pnas.2314261121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Accepted: 01/19/2024] [Indexed: 03/23/2024] Open
Abstract
By releasing specialized metabolites, plants modify their environment. Whether and how specialized metabolites protect plants against toxic levels of trace elements is not well understood. We evaluated whether benzoxazinoids, which are released into the soil by major cereals, can confer protection against arsenic toxicity. Benzoxazinoid-producing maize plants performed better in arsenic-contaminated soils than benzoxazinoid-deficient mutants in the greenhouse and the field. Adding benzoxazinoids to the soil restored the protective effect, and the effect persisted to the next crop generation via positive plant-soil feedback. Arsenate levels in the soil and total arsenic levels in the roots were lower in the presence of benzoxazinoids. Thus, the protective effect of benzoxazinoids is likely soil-mediated and includes changes in soil arsenic speciation and root accumulation. We conclude that exuded specialized metabolites can enhance protection against toxic trace elements via soil-mediated processes and may thereby stabilize crop productivity in polluted agroecosystems.
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Affiliation(s)
- Veronica Caggìa
- Institute of Plant Sciences, University of Bern, BernCH-3013, Switzerland
- Department of Environmental Sciences, University of Basel, Basel4056, Switzerland
| | - Jan Wälchli
- Department of Environmental Sciences, University of Basel, Basel4056, Switzerland
| | | | - Pierre Mateo
- Institute of Plant Sciences, University of Bern, BernCH-3013, Switzerland
| | | | - Hang Guan
- Institute of Geography, University of Bern, BernCH-3012, Switzerland
| | - Moritz Bigalke
- Institute of Geography, University of Bern, BernCH-3012, Switzerland
- Institute of Applied Geoscience, Technical University Darmstadt, DarmstadtD-64287, Germany
| | - Sandra Spielvogel
- Institute of Plant Nutrition and Soil Science, Christian-Albrechts-Universität, Kiel24118, Germany
- Institute of Bio- and Geosciences, Forschungszentrum Jülich GmbH, Jülich52425, Germany
| | - Adrien Mestrot
- Institute of Geography, University of Bern, BernCH-3012, Switzerland
| | - Klaus Schlaeppi
- Institute of Plant Sciences, University of Bern, BernCH-3013, Switzerland
- Department of Environmental Sciences, University of Basel, Basel4056, Switzerland
| | - Matthias Erb
- Institute of Plant Sciences, University of Bern, BernCH-3013, Switzerland
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2
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Augustsson A, Uddh-Söderberg T, Filipsson M, Helmfrid I, Berglund M, Karlsson H, Hogmalm J, Karlsson A, Alriksson S. Challenges in assessing the health risks of consuming vegetables in metal-contaminated environments. ENVIRONMENT INTERNATIONAL 2018; 113:269-280. [PMID: 29157867 DOI: 10.1016/j.envint.2017.10.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 10/09/2017] [Accepted: 10/09/2017] [Indexed: 06/07/2023]
Abstract
A great deal of research has been devoted to the characterization of metal exposure due to the consumption of vegetables from urban or industrialized areas. It may seem comforting that concentrations in crops, as well as estimated exposure levels, are often found to be below permissible limits. However, we show that even a moderate increase in metal accumulation in crops may result in a significant increase in exposure. We also highlight the importance of assessing exposure levels in relation to a regional baseline. We have analyzed metal (Pb, Cd, As) concentrations in nearly 700 samples from 23 different vegetables, fruits, berries and mushrooms, collected near 21 highly contaminated industrial sites and from reference sites. Metal concentrations generally complied with permissible levels in commercial food and only Pb showed overall higher concentrations around the contaminated sites. Nevertheless, probabilistic exposure assessments revealed that the exposure to all three metals was significantly higher in the population residing around the contaminated sites, for both low-, median- and high consumers. The exposure was about twice as high for Pb and Cd, and four to six times as high for As. Since vegetable consumption alone did not result in exposure above tolerable intakes, it would have been easy to conclude that there is no risk associated with consuming vegetables grown near the contaminated sites. However, when the increase in exposure is quantified, its potential significance is harder to dismiss - especially when considering that exposure via other routes may be elevated in a similar way.
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Affiliation(s)
- Anna Augustsson
- Department of Biology and Environmental Science, Linnaeus University, Kalmar, Sweden.
| | - Terese Uddh-Söderberg
- Department of Biology and Environmental Science, Linnaeus University, Kalmar, Sweden
| | - Monika Filipsson
- Department of Biology and Environmental Science, Linnaeus University, Kalmar, Sweden
| | - Ingela Helmfrid
- Occupational and Environmental Medicine Centre, Department of Clinical and Experimental Medicine Linköping University, Linköping, Sweden
| | - Marika Berglund
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Helen Karlsson
- Occupational and Environmental Medicine Centre, Department of Clinical and Experimental Medicine Linköping University, Linköping, Sweden
| | - Johan Hogmalm
- Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden
| | - Andreas Karlsson
- Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden
| | - Stina Alriksson
- Department of Biology and Environmental Science, Linnaeus University, Kalmar, Sweden
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Shakoor MB, Nawaz R, Hussain F, Raza M, Ali S, Rizwan M, Oh SE, Ahmad S. Human health implications, risk assessment and remediation of As-contaminated water: A critical review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 601-602:756-769. [PMID: 28577410 DOI: 10.1016/j.scitotenv.2017.05.223] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 05/19/2017] [Accepted: 05/24/2017] [Indexed: 05/27/2023]
Abstract
Arsenic (As) is a naturally occurring metalloid and Class-A human carcinogen. Exposure to As via direct intake of As-contaminated water or ingestion of As-contaminated edible crops is considered a life threatening problem around the globe. Arsenic-laced drinking water has affected the lives of over 200 million people in 105 countries worldwide. Limited data are available on various health risk assessment models/frameworks used to predict carcinogenic and non-carcinogenic health effects caused by As-contaminated water. Therefore, this discussion highlights the need for future research focusing on human health risk assessment of individual As species (both organic and inorganic) present in As-contaminated water. Various conventional and latest technologies for remediation of As-contaminated water are also reviewed along with a discussion of the fate of As-loaded waste and sludge.
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Affiliation(s)
- Muhammad Bilal Shakoor
- Department of Environmental Sciences and Engineering, Government College University, Faisalabad, Allama Iqbal Road, 38000 Faisalabad, Pakistan.
| | - Rab Nawaz
- Department of Environmental Sciences, The University of Lahore, Lahore, Pakistan
| | - Fida Hussain
- Department of Biological Environment, Kangwon National University, 200-701 Chuncheon, Kangwon-do, South Korea
| | - Maimoona Raza
- Department of Geology, Kangwon National University, 24341 Chuncheon, South Korea; National Water Quality Laboratory, Pakistan Council of Research in Water Resources, Islamabad, Pakistan
| | - Shafaqat Ali
- Department of Environmental Sciences and Engineering, Government College University, Faisalabad, Allama Iqbal Road, 38000 Faisalabad, Pakistan
| | - Muhammad Rizwan
- Department of Environmental Sciences and Engineering, Government College University, Faisalabad, Allama Iqbal Road, 38000 Faisalabad, Pakistan
| | - Sang-Eun Oh
- Department of Biological Environment, Kangwon National University, 200-701 Chuncheon, Kangwon-do, South Korea
| | - Sajjad Ahmad
- Department of Environmental Sciences, COMSATS Institute of Information Technology (CIIT), Vehari Campus, Pakistan
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Ezeonyejiaku CD, Obiakor MO. A Market Basket Survey of Horticultural Fruits for Arsenic and Trace Metal Contamination in Southeast Nigeria and Potential Health Risk Implications. J Health Pollut 2017; 7:40-50. [PMID: 30524829 PMCID: PMC6236540 DOI: 10.5696/2156-9614-7.15.40] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 07/07/2017] [Indexed: 05/29/2023]
Abstract
BACKGROUND Elevated arsenic and trace metal contamination of the terrestrial food chain represents one of the most significant environmental risk exposures for human populations in developing countries. Metalloid and metal contamination in horticultural crop produce such as fruit is a public health concern in Nigeria. Local fruits are cheap sources of vitamins and minerals for the resident population and pose an important dietary threat of metal(loid) toxicity through consumption. OBJECTIVES Market basket investigation of five locally grown (guava, pineapple, orange, and pawpaw) and imported (apple) fruits was conducted to measure the total concentrations of arsenic (As), mercury (Hg), copper (Cu), and lead (Pb) present in these fruits from southeastern Nigeria (Awka, Anambra). METHODS Fruits were analyzed for As and the three metals using atomic absorption spectrophotometry. Moisture content of fruits was determined and used to transform metal concentrations in dry weight to wet weight and compared to Codex food grade standards and assorted (sub)tropical fruits, edible and inedible peels. RESULTS The mean ± standard deviation of elemental concentrations in dry weight ranged from 20.0±0.71-96.84±0.00 μg g-1 for As, 0.02±0.02 - 0.89±0.33 μg g-1 for Hg, 0.11±0.01 - 0.18±0.40 μg g-1 for Cu, and <0.001 - 0.03±0.05 μg g-1 for Pb. The As concentrations (wet weight) in fruits were ~32-166 orders of magnitude higher than Codex Alimentarius Commission (Codex) maximum As food grade levels. Guava and apple methyl Hg concentrations were ~6-~1 orders of magnitude higher than Codex maximum levels, while the content of Cu and Pb in fruits were within acceptable standard limits. CONCLUSIONS The significant concentrations of As and Hg in the examined fruits indicate a potential public health threat. Efforts are needed to initiate and sustain continued monitoring of trace elements in fruits and food sold to consumers due to variation in contaminating sources to ensure food safety. Although a great deal of information exists on Hg toxicity, research on metalloids such as As remains limited in Nigeria and no reliable guidelines exist. Further research is recommended to determine the ecotoxicity of As in Nigeria.
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Middleton DRS, Watts MJ, Beriro DJ, Hamilton EM, Leonardi GS, Fletcher T, Close RM, Polya DA. Arsenic in residential soil and household dust in Cornwall, south west England: potential human exposure and the influence of historical mining. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2017; 19:517-527. [PMID: 28247892 DOI: 10.1039/c6em00690f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Exposure to arsenic (As) via residential soil and dust is a global concern, in regions affected by mining or with elevated concentrations present in underlying geology. Cornwall in south west England is one such area. Residential soil (n = 127) and household dust (n = 99) samples were collected from across Cornwall as part of a wider study assessing exposure to environmental As. Samples were analysed for total As (soil and dust samples) and human ingestion bioaccessible As (soil samples from properties with home-grown produce). Arsenic concentrations ranged from 12 to 992 mg kg-1 in soil and 3 to 1079 mg kg-1 in dust and were significantly higher in areas affected by metalliferous mineralisation. Sixty-nine percent of soils exceeded the 37 mg kg-1 Category 4 Screening Level (C4SL), a generic assessment criteria for As in residential soils in England, which assumes 100% bioavailability following ingestion. The proportion of exceedance was reduced to 13% when the bioavailability parameter in the CLEA model was changed to generate household specific bioaccessibility adjusted assessment criteria (ACBIO). These criteria were derived using bioaccessibility data for a sub-set of individual household vegetable patch soils (n = 68). Proximity to former As mining locations was found to be a significant predictor of soil As concentration. This study highlights the value of bioaccessibility measurements and their potential for adjusting generic assessment criteria.
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Affiliation(s)
- Daniel R S Middleton
- School of Earth, Atmospheric and Environmental Sciences, Williamson Research Centre for Molecular Environmental Science, University of Manchester, Manchester, M13 9PL, UK
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6
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Punshon T, Jackson BP, Meharg AA, Warczack T, Scheckel K, Guerinot ML. Understanding arsenic dynamics in agronomic systems to predict and prevent uptake by crop plants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 581-582:209-220. [PMID: 28043702 PMCID: PMC5303541 DOI: 10.1016/j.scitotenv.2016.12.111] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 12/16/2016] [Accepted: 12/16/2016] [Indexed: 05/20/2023]
Abstract
This review is on arsenic in agronomic systems, and covers processes that influence the entry of arsenic into the human food supply. The scope is from sources of arsenic (natural and anthropogenic) in soils, biogeochemical and rhizosphere processes that control arsenic speciation and availability, through to mechanisms of uptake by crop plants and potential mitigation strategies. This review makes a case for taking steps to prevent or limit crop uptake of arsenic, wherever possible, and to work toward a long-term solution to the presence of arsenic in agronomic systems. The past two decades have seen important advances in our understanding of how biogeochemical and physiological processes influence human exposure to soil arsenic, and this must now prompt an informed reconsideration and unification of regulations to protect the quality of agricultural and residential soils.
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Affiliation(s)
- Tracy Punshon
- Dartmouth College, Department of Biology, 78 College Street, Hanover, NH 03755, USA.
| | - Brian P Jackson
- Dartmouth College, Department of Earth Sciences, Hanover, NH 03755, USA.
| | - Andrew A Meharg
- Institute for Global Food Security, Queen's University Belfast, Belfast BT9 5HN, United Kingdom.
| | - Todd Warczack
- Dartmouth College, Department of Biology, 78 College Street, Hanover, NH 03755, USA.
| | - Kirk Scheckel
- USEPA Office of Research and Development, National Risk Management Laboratory, 26 West Martin Luther King Drive, Cincinnati, OH 45224, USA.
| | - Mary Lou Guerinot
- Dartmouth College, Department of Biology, 78 College Street, Hanover, NH 03755, USA.
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Llorente-Mirandes T, Rubio R, López-Sánchez JF. Inorganic Arsenic Determination in Food: A Review of Analytical Proposals and Quality Assessment Over the Last Six Years. APPLIED SPECTROSCOPY 2017; 71:25-69. [PMID: 28033722 DOI: 10.1177/0003702816652374] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Here we review recent developments in analytical proposals for the assessment of inorganic arsenic (iAs) content in food products. Interest in the determination of iAs in products for human consumption such as food commodities, wine, and seaweed among others is fueled by the wide recognition of its toxic effects on humans, even at low concentrations. Currently, the need for robust and reliable analytical methods is recognized by various international safety and health agencies, and by organizations in charge of establishing acceptable tolerance levels of iAs in food. This review summarizes the state of the art of analytical methods while highlighting tools for the assessment of quality assessment of the results, such as the production and evaluation of certified reference materials (CRMs) and the availability of specific proficiency testing (PT) programmes. Because the number of studies dedicated to the subject of this review has increased considerably over recent years, the sources consulted and cited here are limited to those from 2010 to the end of 2015.
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Affiliation(s)
| | - Roser Rubio
- Department of Analytical Chemistry, University of Barcelona, Spain
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8
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Middleton DRS, Watts MJ, Hamilton EM, Fletcher T, Leonardi GS, Close RM, Exley KS, Crabbe H, Polya DA. Prolonged exposure to arsenic in UK private water supplies: toenail, hair and drinking water concentrations. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2016; 18:562-74. [PMID: 27120003 DOI: 10.1039/c6em00072j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Chronic exposure to arsenic (As) in drinking water is an established cause of cancer and other adverse health effects. Arsenic concentrations >10 μg L(-1) were previously measured in 5% of private water supplies (PWS) in Cornwall, UK. The present study investigated prolongued exposure to As by measuring biomarkers in hair and toenail samples from 212 volunteers and repeated measurements of As in drinking water from 127 households served by PWS. Strong positive Pearson correlations (rp = 0.95) indicated stability of water As concentrations over the time period investigated (up to 31 months). Drinking water As concentrations were positively correlated with toenail (rp = 0.53) and hair (rp = 0.38) As concentrations - indicative of prolonged exposure. Analysis of washing procedure solutions provided strong evidence of the effective removal of exogenous As from toenail samples. Significantly higher As concentrations were measured in hair samples from males and smokers and As concentrations in toenails were negatively associated with age. A positive association between seafood consumption and toenail As and a negative association between home-grown vegetable consumption and hair As was observed for volunteers exposed to <1 As μg L(-1) in drinking water. These findings have important implications regarding the interpretation of toenail and hair biomarkers. Substantial variation in biomarker As concentrations remained unaccounted for, with soil and dust exposure as possible explanations.
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Affiliation(s)
- D R S Middleton
- School of Earth, Atmospheric and Environmental Sciences & William Research Centre for Molecular Environmental Science, University of Manchester, Oxford Rd, Manchester, M13 9PL, UK
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10
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Norton GJ, Deacon CM, Mestrot A, Feldmann J, Jenkins P, Baskaran C, Meharg AA. Cadmium and lead in vegetable and fruit produce selected from specific regional areas of the UK. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 533:520-527. [PMID: 26188403 DOI: 10.1016/j.scitotenv.2015.06.130] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 06/01/2015] [Accepted: 06/29/2015] [Indexed: 06/04/2023]
Abstract
Cadmium and lead were determined in fruit and vegetable produce (~1300 samples) collected from a field and market basket study of locally grown produce from the South-West of Britain (Devon and Cornwall). These were compared with similarly locally grown produce from the North-East of Britain (Aberdeenshire). The concentrations of cadmium and lead in the market basket produce were compared to the maximum levels (ML) set by the European Union (EU). For cadmium 0.2% of the samples exceeded the ML, and 0.6% of the samples exceeded the ML for lead. The location of cadmium and lead in potatoes was performed using laser ablation ICP-MS. All tested samples exhibited higher lead concentrations, and most exhibited increased concentrations of cadmium in the potato skin compared to the flesh. The concentrations of cadmium and lead found in fruits and vegetables sampled during this study do not increase concern about risk to human health.
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Affiliation(s)
- Gareth J Norton
- School of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, St Machar Drive, Aberdeen AB24 3UU, UK.
| | - Claire M Deacon
- School of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, St Machar Drive, Aberdeen AB24 3UU, UK
| | - Adrien Mestrot
- Soil Science Group, Institute of Geography, Universität Bern, Hallerstrasse 12, 3012 Bern, Switzerland
| | - Joerg Feldmann
- Department of Chemistry, School of Physical Sciences, University of Aberdeen, Meston Building, AB24 3UE, UK
| | - Paul Jenkins
- Food Standards Agency, Aviation House, Kingsway, London WC2B 6NH, UK
| | | | - Andrew A Meharg
- Institute for Global Food Security, Queen's University Belfast, David Keir Building, Malone Road, Belfast BT9 5BN, UK
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11
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Joseph T, Dubey B, McBean EA. Human health risk assessment from arsenic exposures in Bangladesh. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 527-528:552-60. [PMID: 26006052 DOI: 10.1016/j.scitotenv.2015.05.053] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 05/14/2015] [Accepted: 05/14/2015] [Indexed: 04/14/2023]
Abstract
High arsenic exposures, prevalent through dietary and non-dietary sources in Bangladesh, present a major health risk to the public. A quantitative human health risk assessment is described as a result of arsenic exposure through food and water intake, tea intake, accidental soil ingestion, and chewing of betel quid, while people meet their desirable dietary intake requirements throughout their lifetime. In evaluating the contribution of each intake pathway to average daily arsenic intake, the results show that food and water intake combined, makes up approximately 98% of the daily arsenic intake with the balance contributed to by intake pathways such as tea consumption, soil ingestion, and quid consumption. Under an exposure scenario where arsenic concentration in water is at the WHO guideline (0.01 mg/L), food intake is the major arsenic intake pathway ranging from 67% to 80% of the average daily arsenic intake. However, the contribution from food drops to a range of 29% to 45% for an exposure scenario where arsenic in water is at the Bangladesh standard (0.05 mg/L). The lifetime excess risk of cancer occurrence from chronic arsenic exposure, considering a population of 160 million people, based on an exposure scenario with 85 million people at the WHO guideline value and 75 million people at the Bangladesh standard, and assuming that 35 million people are associated with a heavy activity level, is estimated as 1.15 million cases.
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Affiliation(s)
- Tijo Joseph
- School of Engineering, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G2W1, Canada
| | - Brajesh Dubey
- School of Engineering, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G2W1, Canada; Environmental Engineering Division, Department of Civil Engineering, Indian Institute of Technology, Kharagpur, West Bengal 721302, India.
| | - Edward A McBean
- School of Engineering, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G2W1, Canada
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12
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Joseph T, Dubey B, McBean EA. A critical review of arsenic exposures for Bangladeshi adults. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 527-528:540-551. [PMID: 26004539 DOI: 10.1016/j.scitotenv.2015.05.035] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 05/09/2015] [Accepted: 05/09/2015] [Indexed: 06/04/2023]
Abstract
Groundwater, the most important source of water for drinking, cooking, and irrigation in Bangladesh, is a significant contributor to the daily human intake of arsenic. Other arsenic intake pathways, established as relevant for Bangladeshi adults through this review, include consumption of contaminated edible plant parts and animal-origin food, inhalation of contaminated air, soil ingestion, betel quid chewing, and tobacco smoking. This review qualifies and quantifies these arsenic intake pathways through analysis of the range of arsenic levels observed in different food types, water, soil, and air in Bangladesh, and highlights the contributions of dietary intake variation and cooking method in influencing arsenic exposures. This study also highlights the potential of desirable dietary patterns and intakes in increasing arsenic exposure which is relevant to Bangladesh where nutritional deficiencies and lower-than-desirable dietary intakes continue to be a major concern.
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Affiliation(s)
- Tijo Joseph
- School of Engineering, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G2W1, Canada
| | - Brajesh Dubey
- School of Engineering, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G2W1, Canada; Environmental Engineering Division, Department of Civil Engineering, Indian Institute of Technology, Kharagpur, West Bengal 721302, India.
| | - Edward A McBean
- School of Engineering, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G2W1, Canada
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13
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Ding C, Zhou F, Li X, Zhang T, Wang X. Modeling the transfer of arsenic from soil to carrot (Daucus carota L.)--a greenhouse and field-based study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:10627-10635. [PMID: 25750050 DOI: 10.1007/s11356-015-4255-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 02/18/2015] [Indexed: 06/04/2023]
Abstract
Reliable empirical models describing arsenic (As) transfer in soil-plant systems are needed to estimate the human As burden from dietary intake. A greenhouse experiment was conducted in parallel with a field trial located at three sites through China to develop and validate soil-plant transfer models to predict As concentrations in carrot (Daucus carota L.). Stepwise multiple linear regression relationships were based on soil properties and the pseudo total (aqua regia) or available (0.5 M NaHCO3) soil As fractions. Carrot As contents were best predicted by the pseudo total soil As concentrations in combination with soil pH and Fe oxide, with the percentage of variation explained being up to 70 %. The constructed prediction model was further validated and improved to avoid overprotection using data from the field trial. The final obtained model is of great practical relevance to the prediction of As uptake under field conditions.
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Affiliation(s)
- Changfeng Ding
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
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14
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Pierart A, Shahid M, Séjalon-Delmas N, Dumat C. Antimony bioavailability: knowledge and research perspectives for sustainable agricultures. JOURNAL OF HAZARDOUS MATERIALS 2015; 289:219-234. [PMID: 25726907 DOI: 10.1016/j.jhazmat.2015.02.011] [Citation(s) in RCA: 114] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 12/02/2014] [Accepted: 02/04/2015] [Indexed: 05/23/2023]
Abstract
The increasing interest in urban agriculture highlights the crucial question of crop quality. The main objectives for environmental sustainability are a decrease in chemical inputs, a reduction in the level of pollutants, and an improvement in the soil's biological activity. Among inorganic pollutants emitted by vehicle traffic and some industrial processes in urban areas, antimony (Sb) is observed on a global scale. While this metalloid is known to be potentially toxic, it can transfer from the soil or the atmosphere to plants, and accumulate in their edible parts. Urban agriculture is developing worldwide, and could therefore increasingly expose populations to Sb. The objective of this review was in consequences to gather and interpret actual knowledge of Sb uptake and bioaccumulation by crops, to reveal investigative fields on which to focus. While there is still no legal maximal value for Sb in plants and soils, light has to be shed on its accumulation and the factors affecting it. A relative absence of data exists about the role of soil flora and fauna in the transfer, speciation and compartmentation of Sb in vegetables. Moreover, little information exists on Sb ecotoxicity for terrestrial ecosystems. A human risk assessment has finally been reviewed, with particular focus on Sb bioaccessibility.
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Affiliation(s)
- Antoine Pierart
- Université de Toulouse, INP, UPS, EcoLab (Laboratoire d'écologie et environnement), ENSAT, Av. de l'Agrobiopôle, F-31326 Castanet-Tolosan, France; UMR 5245 CNRS, EcoLab, F-31326 Castanet-Tolosan, France
| | - Muhammad Shahid
- Department of Environmental Sciences, COMSATS Institute of Information Technology, 61100 Vehari, Pakistan
| | - Nathalie Séjalon-Delmas
- Université de Toulouse, INP, UPS, EcoLab (Laboratoire d'écologie et environnement), ENSAT, Av. de l'Agrobiopôle, F-31326 Castanet-Tolosan, France; UMR 5245 CNRS, EcoLab, F-31326 Castanet-Tolosan, France
| | - Camille Dumat
- CERTOP UMR5044 - CERTOP, Université Jean Jaurès, Toulouse, France.
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Lin K, Lu S, Wang J, Yang Y. The arsenic contamination of rice in Guangdong Province, the most economically dynamic provinces of China: arsenic speciation and its potential health risk. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2015; 37:353-361. [PMID: 25287102 DOI: 10.1007/s10653-014-9652-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Accepted: 09/23/2014] [Indexed: 06/03/2023]
Abstract
Rice is a staple food in China, but it may contain toxic heavy metals. Hence, the concentrations of arsenic (As) species (As(III), As(V), MMA and DMA) were evaluated in 260 rice samples from 13 cities of Guangdong Province, the most economically dynamic provinces of China. The levels of sum concentrations of As species in rice samples varied from non-detect to 225.58 ng g(-1), with an average value of 57.27 ng g(-1). The mean concentrations of the major As species detected in rice samples were in the order As(III) (34.77 ng g(-1)) > As(V) (9.34 ng g(-1)) > DMA (8.33 ng g(-1)) > MMA (4.82 ng g(-1)). The rice samples of Guangdong Province were categorized as inorganic As type. Significant geographical variation of As speciation existed in rice samples of 13 cities of Guangdong Province by chi-square test (p < 0.05). The average human weekly intakes of inorganic As via rice consumption in Guangdong Province, southern China, were 1.91 µg kg(-1) body weight. Hazard quotients of total As via rice consumption of adults in 13 cities ranged from 0.06 to 0.30, indicating the As contents in rice from Guangdong Province had no potential adverse impact on human health.
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Affiliation(s)
- Kai Lin
- Shenzhen Center for Disease Control and Prevention, Shenzhen, 518055, China
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Krieger GR, Kester JE. Letter to the editor. Food Chem Toxicol 2015; 80:346-348. [PMID: 25660480 DOI: 10.1016/j.fct.2015.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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