Suppression of chlorate degradation in longan plantation soil after multiple applications of chlorate and accelerated degradation by sugar amendment

Sutigoolabud, Pathipan; Senoo, Keishi; Ongprasert, Somchai; Hisamatsu, Makoto

doi:10.1080/00380768.2004.10408481

Cited by 5 publications

(18 citation statements)

References 27 publications

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“…Typically, chlorate applied to soils at 34 mg/kg was totally degraded by about 2 weeks in flooded soils and by 8 weeks in soils at 100% of their maximum water holding capacity (MWHC; 35); soils amended with 330 mg/kg chlorate did not degrade appreciable quantities of chlorate over 8 weeks when MWHCs were 100% or less. Addition of reducing equivalents in the form of glucose, sucrose, fructose, or succinate, greatly accelerated the degradation of chlorate, regardless of soil moisture , . Collectively, our results are consistent with previous research showing that chlorate degradation is temperature dependent, is limited by available reducing equivalents, and is rapid when moisture is not limiting.…”

Section: Discussionsupporting

confidence: 91%

Fate of Chlorate Present in Cattle Wastes and Its Impact on Salmonella Typhimurium and Escherichia coli O157:H7

Oliver

Magelky

Bauer

et al. 2008

J. Agric. Food Chem.

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Chlorate salts are being developed as a feed additive to reduce the numbers of pathogens in feedlot cattle. A series of studies was conducted to determine whether chlorate, at concentrations expected to be excreted in urine of dosed cattle, would also reduce the populations of pathogens in cattle wastes (a mixture of urine and feces) and to determine the fate of chlorate in cattle wastes. Chlorate salts present in a urine-manure-soil mixture at 0, 17, 33, and 67 ppm had no significant effect on the rates of Escherichia coli O157:H7 or Salmonella Typhimurium inactivation from batch cultures. Chlorate was rapidly degraded when incubated at 20 and 30 degrees C with half-lives of 0.1 to 4 days. Chlorate degradation in batch cultures was slowest at 5 degrees C with half-lives of 2.9 to 30 days. The half-life of 100 ppm chlorate in an artificial lagoon system charged with slurry from a feedlot lagoon was 88 h. From an environmental standpoint, chlorate use in feedlot cattle would likely have minimal impacts because any chlorate that escaped degradation on the feedlot floor would be degraded in lagoon systems. Collectively, these results suggest that chlorate administered to cattle and excreted in wastes would have no significant secondary effects on pathogens present in mixed wastes on pen floors. Lack of chlorate efficacy was likely due to low chlorate concentrations in mixed wastes relative to chlorate levels shown to be active in live animals, and the rapid degradation of chlorate to chloride at temperatures of 20 degrees C and above.

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Section: Discussionsupporting

confidence: 91%

Fate of Chlorate Present in Cattle Wastes and Its Impact on Salmonella Typhimurium and Escherichia coli O157:H7

Oliver

Magelky

Bauer

et al. 2008

J. Agric. Food Chem.

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“…We reported (Sutigoolabud et al 2004b) that under upland soil conditions, glucose or sucrose amendment of soil at the concentration of 10 g carbon kg-' soil was strikingly effective for accelerating the disappearance of chlorate in soil, when the sugars acted as energy substrates or electron donors, while chlorate acted as electron acceptor for chlorate-reducing microorganisms. This accelerating effect of glucose or sucrose amendment was also confirmed even in soils in which the disappearance of chlorate was suppressed due to repeated application of chlorate (Sutigoolabud et al 2004a).…”

mentioning

confidence: 56%

“…In the contaminated soil, the disappearance of chlorate was suppressed compared with the non-contaminated soil (Sutigoolabud et al 2004a). For the outdoor pot experiment, Kamihama soil, collected in the experimental field of the campus of Mie University (34"44'N, 136"31'E) and passed through a 2 mm mesh sieve (sand-dune Rogosol, pH(H,O), 5.9; OM, 26.1 g kg-I; Sand, 85.3%; Silt, 5.3%; Clay, 9.4%) was used.…”

Section: Soil Samples For the Laboratory Experiments Threementioning

confidence: 99%

“…Geographical location of the soil sampling sites was as follows: PC soil, 19"03'N, 99"06'E; NP soil, 18"54'N, 99"02'E; HD soil, 18"42'N, 99O02'E. Hang Dong soil included two kinds of soils, "chlorate-contaminated soil" taken from the site which had been subjected to repeated application of potassium chlorate and "non-contaminated soil" taken from the site without direct application of potassium chlorate (Sutigoolabud et al 2004a). PC soil and NP soil were selected as representative soils with high (PC soil) and low (NP soil) clay and organic matter contents.…”

Section: Soil Samples For the Laboratory Experiments Threementioning

confidence: 99%

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Decontamination of Chlorate in Longan Plantation Soils by Bio-Stimulation with Molasses Amendment

Sutigoolabud

Senoo

Ongprasert

et al. 2005

Soil Science and Plant Nutrition

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Potassium chlorate is widely used as an active substance for flower induction in longan plantation fields for off‐season production of longan fruits in northern Thailand. Contamination of groundwater with residual chlorate in soil is a cause for concern because of its toxicity to human health. Based on our previous finding that the addition of glucose or sucrose to soil was effective for accelerating the disappearance of residual chlorate in soil, the effect of the addition of molasses, which contains a high concentration of sucrose, as a substitute for glucose or sucrose was examined in laboratory and pot experiments. Under laboratory conditions, the addition of molasses to soil at the concentrations of 100 to 200 g kg−1 soil strikingly enhanced the rate of disappearance of chlorate applied at 341 mg kg−1 soil. Addition of diluted molasses was also effective for the accelerated disappearance of chlorate in soil when 33 g kg−1 soil of molasses was added repeatedly. The effect of repeated addition of diluted molasses to soil on the decontamination of residual chlorate in soil was also confirmed in an outdoor pot experiment. These results may lead to the development of a practical method of cleaning‐up chlorate‐polluted soil in longan plantation fields.

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“…We previously reported the persistence of chlorate in soils collected from several longan plantation fields in Northern Thailand (Sutigoolabud et al . 2004a,b).…”

Section: Introductionmentioning

confidence: 99%

Effect of chlorate on nitrification in longan plantation soil

Sutigoolabud

Mizuno

Ongprasert

et al. 2008

Soil Science and Plant Nutrition

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Potassium chlorate is widely used as an active substance for flower induction in longan plantation fields for the off-season production of fruits in northern Thailand. The effects of the application of chlorate on the mineralization of organic matter in soil, nitrification in soil and the number of culturable soil bacteria were examined. No effect or a very small effect of chlorate on the mineralization of organic matter and soil bacterial number was observed, whereas nitrification was significantly suppressed. Suppression of nitrification should be taken into consideration as a possible side-effect of potassium chlorate in longan plantation soil.

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Suppression of chlorate degradation in longan plantation soil after multiple applications of chlorate and accelerated degradation by sugar amendment

Cited by 5 publications

References 27 publications

Fate of Chlorate Present in Cattle Wastes and Its Impact on Salmonella Typhimurium and Escherichia coli O157:H7

Fate of Chlorate Present in Cattle Wastes and Its Impact on Salmonella Typhimurium and Escherichia coli O157:H7

Decontamination of Chlorate in Longan Plantation Soils by Bio-Stimulation with Molasses Amendment

Effect of chlorate on nitrification in longan plantation soil

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