Factors controlling degradation of pesticides in soil

Sims, Gerald K.; Cupples, Alison M.

doi:10.1002/(sici)1096-9063(199905)55:5<598::aid-ps962>3.0.co;2-n

Cited by 25 publications

(6 citation statements)

References 8 publications

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“…Issues such as herbicidal functional efficacy, carry-over damage to future crops, leaching to groundwater, and the need to cleanup spill sites have nonetheless necessitated understanding of what determines herbicide degradation rates in situ. Most environmental fate processes, including sorption, hydrolysis, volatilization, transport, and accumulation of bound residues, are coupled with degradation in the environment [10]. Each of these processes may respond differently to environmental conditions; thus, in order to effectively use biostimulation for enhancing herbicide degradation, it is important to consider the impact of process coupling on remediation goals.…”

Section: Introductionmentioning

confidence: 99%

Biostimulation for the Enhanced Degradation of Herbicides in Soil

Kanissery

Sims

2011

Applied and Environmental Soil Science

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Cleanup of herbicide-contaminated soils has been a dire environmental concern since the advent of industrial era. Although microorganisms are excellent degraders of herbicide compounds in the soil, some reparation may need to be brought about, in order to stimulate them to degrade the herbicide at a faster rate in a confined time frame. "Biostimulation" through the appropriate utilization of organic amendments and nutrients can accelerate the degradation of herbicides in the soil. However, effective use of biostimulants requires thorough comprehension of the global redox cycle during the microbial degradation of the herbicide molecules in the soil. In this paper, we present the prospects of using biostimulation as a powerful remediation strategy for the rapid cleanup of herbicide-polluted soils.

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Section: Introductionmentioning

confidence: 99%

Biostimulation for the Enhanced Degradation of Herbicides in Soil

Kanissery

Sims

2011

Applied and Environmental Soil Science

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“…The biodegradation of xenobiotics in marine and aquatic environments is mainly viewed as being principally a microbial function, , with many recent studies focusing on the biotransformations of such compounds by microbial enzyme systems for potential applications in bioremediation. − By comparison, relatively little is known regarding how infaunal systems impact the fate of persistent organic pollutants (POPs). This lack of knowledge when compared to the microbial systems may play a critical factor in (i) the successful modeling of pollutants in the environment, (ii) fully understanding how POP metabolites may arise, thus impacting the surrounding ecosystem in an unforeseen way, and (iii) accurately estimating the individual or combined effects of POPs and metabolites, particularly with respect to their bioaccumulation, transport, and fate through environments where human exposure is substantial. − Thus, there is a significant need to identify systems of nonbacterial origin that may be involved in the degradation or biotransformations of POPs in order to be able to fully assess the impact of these chemicals, including their metabolites, on the environment.…”

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confidence: 99%

Nonmicrobial Nitrophenol Degradation via Peroxygenase Activity of Dehaloperoxidase-Hemoglobin from Amphitrite ornata

et al. 2016

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The marine hemoglobin dehaloperoxidase (DHP) from Amphitrite ornata was found to catalyze the H2O2-dependent oxidation of nitrophenols, an unprecedented nonmicrobial degradation pathway for nitrophenols by a hemoglobin. Using 4-nitrophenol (4-NP) as a representative substrate, the major monooxygenated product was 4-nitrocatechol (4-NC). Isotope labeling studies confirmed that the O atom incorporated was derived exclusively from H2O2, indicative of a peroxygenase mechanism for 4-NP oxidation. Accordingly, X-ray crystal structures of 4-NP (1.87 Å) and 4-NC (1.98 Å) bound to DHP revealed a binding site in close proximity to the heme cofactor. Peroxygenase activity could be initiated from either the ferric or oxyferrous states with equivalent substrate conversion and product distribution. The 4-NC product was itself a peroxidase substrate for DHP, leading to the secondary products 5-nitrobenzene-triol and hydroxy-5-nitro-1,2-benzoquinone. DHP was able to react with 2,4-dinitrophenol (2,4-DNP) but was unreactive against 2,4,6-trinitrophenol (2,4,6-TNP). pH dependence studies demonstrated increased reactivity at lower pH for both 4-NP and 2,4-DNP, suggestive of a pH effect that precludes the reaction with 2,4,6-TNP at or near physiological conditions. Stopped-flow UV-visible spectroscopic studies strongly implicate a role for Compound I in the mechanism of 4-NP oxidation. The results demonstrate that there may be a much larger number of nonmicrobial enzymes that are underrepresented when it comes to understanding the degradation of persistent organic pollutants such as nitrophenols in the environment.

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“…Mikami et al foun that procymidone had faster degradation rate in water with pH = 9 than that with pH = 5 Therefore, the degradation of procymidone in soil was mainly promoted by the highe organic carbon content and pH [11]. The previous studies proved that the degradation o pesticides in soil was mainly influenced by soil microorganisms [16][17][18]. Moreover, Ta and Yang found that there is a positive correlation between the soil microbial biomass and…”

Section: Discussionmentioning

confidence: 99%

Environmental Behaviors of Procymidone in Different Types of Chinese Soil

Zhang

et al. 2021

Sustainability

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Procymidone is a widely used fungicide in the prevention and treatment of fungal diseases on many crops in China. Part of the procymidone will enter the soil during the application process. Procymidone may exhibit environmental behavior diversity in different soils. Therefore, it is extremely important to clarify the environmental behavior of procymidone in soil for its environmental safety evaluation. Here, the degradation, adsorption, and mobility behaviors of procymidone in four typical types of Chinese soil were investigated for the first time. The half-lives of procymidone in the soils ranged from 14.3 d to 24.1 d. The degradation rates of procymidone in the soils were promoted by organic matter content, moisture content, and microorganisms. Furthermore, the degradation of procymidone on the soil surface was promoted by light. The desorption rates of procymidone in laterite soil, yellow brown soil, black soil, and chestnut soil were 27.52 ± 0.85%, 16.22 ± 0.78%, 13.67 ± 1.29%, and 7.62 ± 0.06%, respectively, which were contrary to the adsorption ability. The mobility order of procymidone in the soils was: laterite soil > yellow brown soil > black soil > chestnut soil, with the Rf values of 0.28, 0.22, 0.18, and 0.16, respectively. Three degradation products of procymidone were identified by liquid chromatography coupled with quadrupole/time-of-flight mass spectrometry, and the degradation pathway of procymidone in the soil was speculated. The results will provide a theoretical basis for the removal of procymidone in the soil environment.

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Factors controlling degradation of pesticides in soil

Cited by 25 publications

References 8 publications

Biostimulation for the Enhanced Degradation of Herbicides in Soil

Biostimulation for the Enhanced Degradation of Herbicides in Soil

Nonmicrobial Nitrophenol Degradation via Peroxygenase Activity of Dehaloperoxidase-Hemoglobin from Amphitrite ornata

Environmental Behaviors of Procymidone in Different Types of Chinese Soil

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