Concentration and loading of several pesticides in water, suspended solids and sediment during ordinary water discharge in Sugao marsh, Ibaraki Prefecture, Japan

Kawakami, Tsuyoshi; Eun, Heesoo; Arao, Tomohito; Endo, Shozo; Ueji, Masako; Tamura, Kenji; Higashi, Teruo

doi:10.1584/jpestics.31.6

Cited by 16 publications

(11 citation statements)

References 13 publications

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“…The simazine-degrading capability of the enriched charcoal was maintained for nearly 2 years. 4) Thus, Charcoal A100 enriched with CD7 is considered to be an effective material for bioremediation; however, CD7 and strain CDB21 could not degrade methylthio-s-triazines detected in river water, 3,6) a lake basin, 7) and river sediments, 8) while Rhodococcus sp. FJ1117YT 9) can transform methylthio-s-triazines to their hydroxyl analogues via sulfur oxidation, and accumulate hydroxy-striazines.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous biodegradation of chloro- and methylthio-s-triazines using charcoal enriched with a newly developed bacterial consortium

et al. 2008

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A special type of charcoal, Charcoal A100, was enriched with a newly developed bacterial consortium using a perfusion method. The bacterial consortium consisted of a methylthio-s-triazine-degrading bacterium (Rhodococcus sp. FJ1117YT) and the chloros-triazine-degrading bacterial consortium CD7 (containing Bradyrhizobium japonicam CSB1, Arthrobacter sp. CD7w and b-Proteobacteria CDB21). Enriched charcoal was capable of degrading chloro-s-triazines (simazine and atrazine) and methylthio-s-triazines (simetryn and dimethametryn) simultaneously in sulfur-free medium. Almost complete degradation was observed after 4-day cultivation of chloro-s-triazines and 9-day cultivation of methylthio-s-triazines. These triazines were mineralized via their 2-hydroxy analogues.

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Section: Introductionmentioning

confidence: 99%

Simultaneous biodegradation of chloro- and methylthio-s-triazines using charcoal enriched with a newly developed bacterial consortium

et al. 2008

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“…A similar tendency has been reported in other studies. 4,5,22,23) The concentrations of early-mid-season herbicides, such as daimuron, peaked immediately after transplanting (from early to mid-May), and then decreased rapidly in late May. The concentrations of mid-season herbicides, such as simetryn, peaked 3-4 weeks after transplanting (from late May to early June), and then decreased in mid-June.…”

Section: Herbicidesmentioning

confidence: 99%

Behavior of paddy pesticides and major metabolites in the Sakura River, Ibaraki, Japan

et al. 2010

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Thirty-nine paddy pesticides and 11 of their metabolites were monitored in the Sakura River during the rice cultivation season in 2007 and 2008. Pesticide concentrations in the river water depended on the timing of pesticide application. Herbicides that were shipped to Ibaraki Prefecture in large amounts or had high water solubility, a low soil adsorption constant value, or large usage rates were detected at high peak concentrations. The concentrations of nursery-box-applied fungicides and insecticides peaked immediately after transplanting. The concentrations of pesticide metabolites, such as bromobutide-desbromo, cafenstrol-descarbamoyl, clomeprop-propionic acid, carbofuran, and fenthion-sulfoxide depended on the degradation rates and metabolic pathways of the parent compounds and on the stability of the metabolites in water and soil. Clomeprop-propionic acid, carbofuran, and fenthion-sulfoxide, which were formed from rapidly degradable pesticides, were detected at much higher peak concentrations than the parent compounds. © Pesticide Science Society of Japan Keywords: paddy pesticide, application timing, river water, physicochemical property, metabolic pathway, environmental fate. Original Articlefield area is under rice cultivation. After soil puddling and land leveling in late April, rice seedlings are transplanted in early May. Intermittent irrigation starts in mid-June and continues throughout the growing period, except during the midsummer drainage period from late June to mid-July. Generally, heading occurs from late July to early August, and harvest starts in early September, after drainage of the paddy water in late August. 15)Early-mid-season herbicides are applied within 2 weeks after transplanting (early to mid-May), and mid-season herbicides are applied 2-3 weeks after transplanting (late May to early June). Depending on the emergence of weeds, a lateseason herbicide might be used in June.16) Fungicides and insecticides are used on rice seedlings in nursery boxes before transplanting and for direct application to paddy fields before heading or harvest. Recently, nursery-box application has become increasing popular in the Sakura River basin. Aerial spraying of paddy pesticides was not conducted in the basin in 2007 and 2008 (Japan Agricultural Aviation Association: private communication; unpublished data). Analyzed compoundsTwenty-nine herbicides, 2 fungicides, and 8 insecticides were selected for analysis (Table 1), in consideration of the amounts of paddy pesticides shipped to Ibaraki Prefecture recently. We selected 11 metabolites of the herbicides and insecticides in accord with previous studies 11,14,17,18) as a reference. All analytical standards were purchased from Wako Pure Chemicals Industries (Japan), Hayashi Pure Chemicals Industries (Japan), or Kanto Chemicals (Japan). Sample collection and analysisThe sampling site (Kimijima Bridge) is located midway along the course of the Sakura River (Fig. 1). Water samples (approximately 3000 ml per sample) were collected once a week on Monday fr...

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“…The conventional sampling method for aquatic pesticides has been grab sampling. [3][4][5] Grab sampling is a method in which a single sample is collected at a particular time.…”

Section: Introductionmentioning

confidence: 99%

Determining the suitability of a polar organic chemical integrated sampler (POCIS) for the detection of pesticide residue in the Ishikawa River and its tributary in Osaka, Japan

Yabuki

Ono

Nagai

et al. 2018

Journal of Pesticide Science

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The monitoring of pesticide concentrations in Japanese rivers was conducted via a grab sampling method and a passive sampling method using the polar organic chemical integrated sampler (POCIS). The results showed that cumulative detections were 84 with grab sampling and 98 with the POCIS. All of the pesticides detected by grab sampling could be quantified with a POCIS except for one (although its traces were detected). In addition, 15 detections quantified by POCIS were undetected by grab sampling. The average concentrations of pesticides detected by both the POCIS and grab sampling during the investigation period were compared. A good correlation was observed between the two methods with a slope of 1.00 and a coefficient of correlation (r) of 0.897 (n=79). Although high temporal variability was observed in the pesticide concentrations by grab sampling, the average pesticide concentrations obtained by the two methods showed similar values during the investigation period.

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Concentration and loading of several pesticides in water, suspended solids and sediment during ordinary water discharge in Sugao marsh, Ibaraki Prefecture, Japan

Cited by 16 publications

References 13 publications

Simultaneous biodegradation of chloro- and methylthio-s-triazines using charcoal enriched with a newly developed bacterial consortium

Simultaneous biodegradation of chloro- and methylthio-s-triazines using charcoal enriched with a newly developed bacterial consortium

Behavior of paddy pesticides and major metabolites in the Sakura River, Ibaraki, Japan

Determining the suitability of a polar organic chemical integrated sampler (POCIS) for the detection of pesticide residue in the Ishikawa River and its tributary in Osaka, Japan

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