Outcomes of the first combined national survey of pesticides and emerging organic contaminants (EOCs) in groundwater in New Zealand 2018

Close, Murray E.; Humphries, Bronwyn; Northcott, Grant L.

doi:10.1016/j.scitotenv.2020.142005

Cited by 34 publications

(8 citation statements)

References 28 publications

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“…Relatively few studies have characterized the occurrence of pesticide degradates in groundwater at regional or national rather than local scales, including in other countries. − Most regional or national investigations in the United States were conducted between 1991 and 2001 using gas chromatography/mass spectrometry (GC/MS) and (or) high-performance liquid chromatography (HPLC), providing detection limits (DLs) of typically 1–100 ng/L. − ,− These have included studies of shallow groundwater and of depths used for public supply.…”

Section: Introductionmentioning

confidence: 99%

Pesticides and Pesticide Degradates in Groundwater Used for Public Supply across the United States: Occurrence and Human-Health Context

Bexfield

Belitz

Lindsey

et al. 2020

Environ. Sci. Technol.

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This is the first assessment of groundwater from public-supply wells across the United States to analyze for >100 pesticide degradates and to provide human-health context for degradates without benchmarks. Samples from 1204 wells in aquifers representing 70% of the volume pumped for drinking supply were analyzed for 109 pesticides (active ingredients) and 116 degradates. Among the 41% of wells where pesticide compounds were detected, nearly two-thirds contained compound mixtures and three-quarters contained degradates. Atrazine, hexazinone, prometon, tebuthiuron, four atrazine degradates, and one metolachlor degradate were each detected in >5% of wells. Detection frequencies were largest for aquifers with more shallow, unconfined wells producing modern-age groundwater. To screen for potential human-health concerns, benchmark quotients (BQs) were calculated by dividing concentrations by the human-health benchmark, when available. For degradates without benchmarks, estimated values (estimated benchmark quotients (BQE)) were first calculated by assuming equimolar toxicity to the most toxic parent; final analysis excluded degradates with likely overestimated toxicity. Six pesticide compounds and 1.6% of wells had concentrations approaching levels of potential concern (individual or summed BQ or BQE values >0.1), and none exceeded these levels (values >1). Therefore, although pesticide compounds occurred frequently, concentrations were low, even accounting for mixtures and degradates without benchmarks.

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Section: Introductionmentioning

confidence: 99%

Pesticides and Pesticide Degradates in Groundwater Used for Public Supply across the United States: Occurrence and Human-Health Context

Bexfield

Belitz

Lindsey

et al. 2020

Environ. Sci. Technol.

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“…Effective management of anthropogenic contaminants involves the identification of chemicals of concern, clear definitions of policies for pollution prevention and control, as well as an appropriate allocation of resources to address knowledge gaps (Dulio et al, 2018). The chemicals used in the present study are found at low concentrations (often at nanograms per liter) where ecotoxicological effects are not observed (Close et al, 2021; Sánchez‐Avila et al, 2012). Although the milligrams per milliliter concentrations used in the present study would not be of environmental concern, based on ecotoxicity thresholds defined in the present study, their ability to exert biological effects should not be overlooked (Jiang et al, 2014).…”

Section: Discussionmentioning

confidence: 89%

Investigating the Ecotoxicity of Select Emerging Organic Contaminants Toward the Marine Copepod Gladioferens pectinatus

Barrick

Champeau

Butler

et al. 2022

Enviro Toxic and Chemistry

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Estuarine ecosystems are recipients of anthropogenic stressors released from land‐based activities. The aim of the present study was to investigate the ecotoxicological hazards of organic contaminants toward the estuarine copepod Gladioferens pectinatus using acute and chronic testing. Most chemicals demonstrated acute toxicity and influenced development of the copepods. Further research should be conducted to investigate these chemicals and their mixtures using long‐term, multigenerational testing to characterize mechanisms of toxicity. Environ Toxicol Chem 2022;41:792–799. © 2022 SETAC

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“…Other known groups that form the growing list of emerging contaminants are chemical synthesizers and intermediates, corrosion inhibitors, flame retardants, plasticizers, per-and polyfluorinated compounds, biocides, hormones, resistance genes, etc. [121][122][123][124][125]. These emerging contaminants make more crucial the development of future research on the adsorption of these contaminants through the implementation of agricultural residues.…”

Section: Challenges and Future Perspectivesmentioning

confidence: 99%

Development and Characterization of Bioadsorbents Derived from Different Agricultural Wastes for Water Reclamation: A Review

et al. 2022

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The presence of dangerous pollutants in different water sources has restricted the availability of this natural resource. Thus, the development of new low-cost and environmentally-friendly technologies is currently required to ensure access to clean water. Various approaches to the recovery of contaminated water have been considered, including the generation of biomaterials with adsorption capacity for dangerous compounds. Research on bioadsorbents has boomed in recent years, as they constitute one of the most sustainable options for water treatment thanks to their abundance and high cellulose content. Thanks to the vast amount of information published to date, the present review addresses the current status of different biosorbents and the principal processes and characterization methods involved, focusing on base biomaterials such as fruits and vegetables, grains and seeds, and herbage and forage. In comparison to other reviews, this work reports more than 60 adsorbents obtained from agricultural wastes. The removal efficiencies and/or maximum adsorption capacities for heavy metals, industrial contaminants, nutrients and pharmaceuticals are presented as well. In addition to the valuable information provided in the literature investigation, challenges and perspectives concerning the implementation of bioadsorbents are discussed in order to comprehensively guide selection of the most suitable biomaterials according to the target contaminant and the available biowastes.

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Outcomes of the first combined national survey of pesticides and emerging organic contaminants (EOCs) in groundwater in New Zealand 2018

Cited by 34 publications

References 28 publications

Pesticides and Pesticide Degradates in Groundwater Used for Public Supply across the United States: Occurrence and Human-Health Context

Pesticides and Pesticide Degradates in Groundwater Used for Public Supply across the United States: Occurrence and Human-Health Context

Investigating the Ecotoxicity of Select Emerging Organic Contaminants Toward the Marine Copepod Gladioferens pectinatus

Development and Characterization of Bioadsorbents Derived from Different Agricultural Wastes for Water Reclamation: A Review

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