Competitive degradation between the fumigants chloropicrin and 1,3-dichloropropene in unamended and amended soils.

doi:10.2134/JEQ2003.1735

Paper

Competitive degradation between the fumigants chloropicrin and 1,3-dichloropropene in unamended and amended soils.

Published Sep 1, 2003 · Wei Zheng, S. Papiernik, Minxing Guo

Journal of environmental quality

Q2 SJR score

30

Citations

0

Influential Citations

Full textSemantic Scholar

Abstract

The mixture of 1,3-dichloropropene (1,3-D) and chloropicrin (CP) is used as a preplant soil fumigant. In comparison with individual fumigants, application of a mixture may affect the environmental dissipation and fate of each chemical, such as emission and degradation. We investigated the degradation of CP, 1,3-D, and their mixture in fresh soils and sterile soils, and evaluated the competitive characteristic of fumigants in the mixture. The degradation of low concentrations of CP in fresh soil was accelerated at early times in the presence of 1,3-D, whereas the addition of CP reduced the degradation rate of trans-1,3-D, possibly by inhibiting the activity of trans-1,3-D degrading microorganisms. The potential of applying amendments to the soil to increase the rate of CP and 1,3-D degradation was also illustrated. The degradation of both fumigants was significantly enhanced in soils amended with ammonium thiosulfate (ATS) and sodium diethyldithiocarbamate (Na-DEDTC) compared with unamended soil. Competitive degradation was observed for CP in amended soils in the presence of 1,3-D. The degradation of cis-1,3-D in amended soils spiked as a mixture of 1,3-D and CP was repressed compared with the rate of degradation in samples spiked with 1,3-D only. This implied that in abiotic degradation, CP and cis-1,3-D competed for a limited number of reaction sites in amended soil, resulting in decreased degradation rates. No significant influence of fumigant mixtures was observed for trans-1,3-D in amended soil.

Study Snapshot

A mixture of 1,3-dichloropropene and chloropicrin accelerates CP degradation in fresh soil, but reduces trans-1,3-D degradation, and amendments can enhance their degradation rates.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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Paper

Competitive degradation between the fumigants chloropicrin and 1,3-dichloropropene in unamended and amended soils.

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References

Life after methyl bromide

The phase out of methyl bromide in agriculture is a complex process, with some farmers arguing it's going too slowly, while others wait for the right alternatives.

Dechlorination of chloroacetanilide herbicides by thiosulfate salts

Thiosulfate salts can rapidly dechlorinate chloroacetanilide herbicides in water, sand, and soil, potentially offering a safe method for removing environmental contaminants like these.

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Organic soil amendments, particularly composted steer manure, can accelerate the degradation of 1,3-dichloropropene and reduce volatile emissions, potentially improving air quality.

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Applying 1,3-Dichloropropene via subsurface drip irrigation with reduced dosage has great potential for emission reduction compared to conventional shank injection.

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This method provides a sensitive and reproducible measure of permeability of agricultural films, aiding in the development of low-permeability films for soil fumigation.

Citations

Rice straw biochar in combination with farmyard manure mitigates bromoxynil toxicity in wheat (Triticum aestivum L.).

Rice straw biochar and farmyard manure effectively reduce bromoxynil toxicity in wheat plants, increasing growth and yield, making them a promising option for mitigating residual herbicide issues and improving crop yield.

1,3-Dichloropropene and chloropicrin emission reduction using a flexible CuInS2/ZnS:Al-TiO2 photocatalytic film

A flexible CuInS2/ZnS:Al-TiO2 photocatalytic film effectively reduces 1,3-dichloropropene and chloropicrin emissions from soil fumigation, reducing air pollution and human exposure.

Effect of application rate on chloropicrin half-life and simulated emissions across a range of soil conditions.

Increased application rates of chloropicrin (CP) in agricultural fields decrease its degradation rate, leading to increased emissions from soil to air, potentially impacting air quality and human health.

Deep injection and the potential of biochar to reduce fumigant emissions and effects on nematode control.

Deep fumigant injection and biochar soil amendments can reduce fumigant emissions without reducing nematode control in pre-plant soil fumigation.

Application rate affects the degradation rate and hence emissions of chloropicrin in soil.

Low application rates of chloropicrin lead to disproportionally low emission losses compared to higher application rates, which could be considered when assessing and mitigating risk.

Optimized synthesis of CuInS2/ZnS:Al–TiO2 nanocomposites for 1,3-dichloropropene photodegradation

The optimized CuInS2/ZnS:Al-TiO2 nanocomposites for 1,3-dichloropropene photodegradation have a 92% degradation efficiency when using 23% CIS/ZnS:Al QDs, 418 min coating time, and 1.6

Stable and Flexible CuInS2/ZnS:Al-TiO2 Film for Solar-Light-Driven Photodegradation of Soil Fumigant.

The stable CuInS2/ZnS:Al-TiO2 photocatalytic film effectively degrades soil fumigant 1,3-dichloropropene under natural solar light, offering a promising solution for emission reduction.

Effect of co-formulation of 1,3-dichloropropene and chloropicrin on evaporative emissions from soil.

Co-application of 1,3-D and chloropicrin in soil fumigation reduces emissions of chloropicrin, but co-application itself is not a significant factor in emission losses.

Dissipation of soil fumigants from soil following repeated applications.

Soil fumigant dissipation varies greatly among different soil types, with biotic factors playing a greater role in metam sodium and methyl bromide dissipation than abiotic factors.