Soil and water contamination at pesticide mixing and loading sites on Oahu, Hawaii

Cj, Miles; Yanagihara, K.; Ogata, Shunta; G, Van De Verg; Boesch, Robert

doi:10.1007/bf01702189

Cited by 12 publications

(3 citation statements)

References 7 publications

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“…Thus, the concentration ranges used in our study are not unusual, either at agrochemical retail facilities or on farmsteads. Other studies have shown that concentrations > 1 ,OOO mg/kg are detected in soil around pesticide mixing and loading sites [24]. Our results show that concentrations of alachlor greater than 100 mg/kg are significantly more persistent than at 10 mg/kg, and concentrations as high as 1,000 mg/kg do not degrade within 1 month (Fig.…”

Section: Discussionsupporting

confidence: 65%

Effect of Alachlor Concentration and an Organic Amendment on Soil Dehydrogenase Activity and Pesticide Degradation Rate

Felsot

Dzantor

1995

Environ Toxicol Chem

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Past studies have shown that extremely high concentrations of alachlor in soil can depress microbial biomass and bioactivity; consequently, degradation of alachlor is also inhibited. Studies were undertaken to further characterize the relationship among alachlor concentration in soil, dehydrogenase activity (as an indicator of microbial activity), and degradation rate. Alachlor initially inhibited soil dehydrogenase in soil at concentrations as low as 250 mg/kg with prolonged inhibition through at least 21 d occurring at concentrations 2750 mg/kg. The inhibition of soil dehydrogenase was associated with a prolonged persistence of alachlor beyond the previously reported ranges of half-life observed at normal field rates of application. Amendment of soil with cornmeal caused degradation of 10 to 250 mg/kg alachlor at rates substantially faster than previously reported for laboratory incubations. At alachlor concentrations 2750 mg/kg, dehydrogenase activities in amended soils surpassed levels in corresponding no-pesticide controls after 21 d; coincidentally, >50% of the initially added alachlor had degraded during the same period. These results suggested that stimulation of microbial bioactivity by addition of organic amendments may enhance co-metabolism of high concentrations of pesticides in soil.

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Section: Discussionsupporting

confidence: 65%

Effect of Alachlor Concentration and an Organic Amendment on Soil Dehydrogenase Activity and Pesticide Degradation Rate

Felsot

Dzantor

1995

Environ Toxicol Chem

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“…Agrochemicals have been detected in Hawaii's groundwater as far back as 1979, when traces of dibromochloropropane (DBCP) were discovered, and various other contaminants have since been found including ethylene dibromide (EDB), trichloropropane, bromacil, hexazinone, and atrazine (Khan and Liang, 1989;Li et al, 2001;Miles et al, 1990;Oki and Giambelluca, 1987;Zhu and Li, 2002). Hawaii's plantation agriculture elicits the widespread application of pesticides for crop production.…”

Section: Introductionmentioning

confidence: 99%

Pesticide sorption and leaching potential on three Hawaiian soils

Hall

Ray

et al. 2015

Journal of Environmental Management

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“…Contamination of soil and groundwater is an example (2)(3)(4), and its plant toxicity is influenced by the extent to which it is free in solution or sorbed (5,6). Mathematical models for its persistence and mobility in soils must account for sorption-desorption kinetics and equilibria, and chemical degradation (7,8).…”

Section: Introductionmentioning

confidence: 99%

Atrazine in mineral soil: the analytical chemistry of speciation

Gamble¹,

Ismaily²

1992

Can. J. Chem.

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The HPLC–microfiltration method previously described for determining atrazine and hydroxyatrazine species in organic soil has been adapted to a mineral soil. The method was able to monitor atrazine concentrations of less than 1.0 × 10−6 M, which is over 40 times lower than the atrazine concentrations measured in the earlier organic soil experiments. During kinetics.experiments, it also monitored four free and sorbed chemical species instead of only one. Measurements were obtained with much better accuracy and productivity than can be obtained by conventional methods. The atrazine sorption capacity of the mineral soil was also measured. The analytical chemical data produced can support heterogeneous chemical kinetics calculations.

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Soil and water contamination at pesticide mixing and loading sites on Oahu, Hawaii

Cited by 12 publications

References 7 publications

Effect of Alachlor Concentration and an Organic Amendment on Soil Dehydrogenase Activity and Pesticide Degradation Rate

Effect of Alachlor Concentration and an Organic Amendment on Soil Dehydrogenase Activity and Pesticide Degradation Rate

Pesticide sorption and leaching potential on three Hawaiian soils

Atrazine in mineral soil: the analytical chemistry of speciation

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