Degradation of pesticides applied to banana farm soil: Comparison of indigenous bacteria and a microbial mat

Murray, R R; Phillips, Peter C.B.; Bender, Judith

doi:10.1002/etc.5620160109

Cited by 15 publications

(3 citation statements)

References 14 publications

(21 reference statements)

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“…This value is critical regarding the adsorption amount of 108.818 mg of chlordane/L ethanol for a short period of 5 minutes for each same-sized cryogel disk. This value achieved by the removal of chlordane is quite comparable to similar studies in the literature (17,44,45). At the same time, as mentioned above, all of the binding sites of a cryogel disk were engaged with the target molecules, chlordane.…”

Section: Adsorption Studiessupporting

confidence: 90%

Nicotinamide-Modified poly(HEMA-GMA)-Nic Cryogels for Removal of Pesticides

Köse¹,

Akveran²,

Erol³

et al. 2018

Journal of the Turkish Chemical Society Section A: Chemistry

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Chlordane is only one of the persistent pesticides used in some countries despite the ban. Removal of chlordane, a severe threat to all living things, was performed using nicotinamide-modified poly (2-hydroxyethyl methacrylate-glycidyl methacrylate), poly(HEMA-GMA)-Nic, polymeric cryogels in this study. Poly(HEMA-GMA) polymeric cryogels were synthesized based on previously reported literature procedures and were subsequently modified by nicotinamide moieties. Removal of chlordane in alcoholic medium has been accomplished exploiting the alcoho-phobic interaction, which was the first indication in our previous study. Structural analysis of poly(HEMA-GMA)-Nic was performed using Fourier transform infrared spectroscopy (FT-IR) and elemental analysis methods. Scanning electron microscopy (SEM) was used to understand the surface morphology of cryogels. Surface area and cavity volume calculations were determined by applying N2 adsorption method and swelling test. The interaction time and maximum adsorption capacity were identified as 5 minutes and 64.61 mg chlordane/g cryogel for 300 mg/L chlordane concentration and 108.818 mg chlordane/g cryogel for 800 mg/L chlordane concentration during the adsorption experiments. Cyclohexane, toluene, chloroform, dichloromethane, acetone, and acetonitrile were used as solvents to observe the solvent effect on adsorption of chlordane onto the polymeric material. As expected, the removal of chlordane was performed with the highest adsorption performance in cyclohexane with the lowest dielectric constant.

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Section: Adsorption Studiessupporting

confidence: 90%

Nicotinamide-Modified poly(HEMA-GMA)-Nic Cryogels for Removal of Pesticides

Köse¹,

Akveran²,

Erol³

et al. 2018

Journal of the Turkish Chemical Society Section A: Chemistry

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“…Microbial adaptation in soil may occur in surface soil under banana cultivation exposed to nematicides , or under other agricultural uses exposed to herbicides and insecticides . In banana farm soil, enriched cultures of 3 bacterial isolates and 1 microbial mat had significant ability to degrade 4 pesticides . Use of organic amendments is a potential method for controlling soil pesticide leaching but has very little or no effect against pollution from compounds with high water solubility .…”

Section: Introductionmentioning

confidence: 99%

Banana leaf and glucose mineralization and soil organic matter in microhabitats of banana plantations under long‐term pesticide use

Blume

Reichert

2015

Enviro Toxic and Chemistry

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Soil organic matter (SOM) and microbial activity are key components of soil quality and sustainability. In the humid tropics of Costa Rica 3 pesticide regimes were studied-fungicide (low input); fungicide and herbicide (medium input); and fungicide, herbicide, and nematicide (high input)-under continuous banana cultivation for 5 yr (young) or 20 yr (old) in 3 microhabitats-nematicide ring around plants, litter pile of harvested banana, and bare area between litter pile and nematicide ring. Soil samples were incubated sequentially in the laboratory: unamended, amended with glucose, and amended with ground banana leaves. Soil organic matter varied with microhabitat, being greatest in the litter pile, where microbes had the greatest basal respiration with ground banana leaf, whereas microbes in the nematicide ring had the greatest respiration with glucose. These results suggest that soil microbes adapt to specific microhabitats. Young banana plantations had similar SOM compared with old plantations, but the former had greater basal microbial respiration in unamended and in glucose-amended soil and greater first-order mineralization rates in glucose-amended soil, thus indicating soil biological quality decline over time. High pesticide input did not decrease microbial activity or mineralization rate in surface soil. In conclusion, microbial activity in tropical volcanic soil is highly adaptable to organic and inorganic inputs.

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“…Surfaces of microbial mats, dominated by filamentous cyanobacteria (Oscillatoria), can sequester U(VI) and settle to the bottom, where the biogeochemical conditions exist for reduction of U(VI) to U(IV). The capacity of microbial mats to remove many heavy metals and metalloids (7,18,19) and to degrade recalcitrant organics (20) while removing metals (21) makes mats an ideal biological material for use in bioremediation. Because the microbial mats are photosynthetic, the Eh can be regulated by shading the environment.…”

Section: Introductionmentioning

confidence: 99%

Bioremediation and Bioreduction of Dissolved U(VI) by Microbial Mat Consortium Supported on Silica Gel Particles

Bender

Duff

Phillips

et al. 2000

Environ. Sci. Technol.

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The goal of this research was to simulate natural attenuation processes for uranium (U) by constructing a bioremediation system based on microbial mats. Ancient microbial consortia, such as microbial mats, have evolved the capacity to manage hostile environments and potentially bioremediate metal-contaminated water. To facilitate the engineering applications of microbial mats, the constituent microbial groups of the mat consortium were immobilized with required nutrients in silica gel. Resulting silica mat particles (SMP) were tested for efficiency in removing and, subsequently, reducing U(VI) to U(IV). Uraniumcontaining groundwaters from a Superfund Site (0.2 mg U(VI) L -1 , 293 mg HCO 3 L -1 at pH 8.2) and synthetic waters (∼0.05-2 mg U(VI) L -1 , pH 8-9) were assessed with this system. Over 80% of the dissolved U(VI), present as mostly U(VI)-carbonate (Superfund) or U(VI)-hydrolysis species (synthetic), was removed by the SMP within 15 min of treatment. X-ray absorption near-edge structure spectroscopy studies showed that the U sequestered in the SMP was reduced to U(IV) within 24 h of exposure. Effective sequential batch treatments and maintenance of a low redox environment by nutrient additions demonstrated the potential for long-term durability and capacity for continuous use of this system. Drying the SMP produced a hard compact product (1% of original weight). Capacity for on-site generation of SMP, relative low-cost constituent materials, the simplicity of management, and the formation of a stable compact disposal product indicate this system has great potential for the field remediation of U-contaminated waters.

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Degradation of pesticides applied to banana farm soil: Comparison of indigenous bacteria and a microbial mat

Cited by 15 publications

References 14 publications

Nicotinamide-Modified poly(HEMA-GMA)-Nic Cryogels for Removal of Pesticides

Nicotinamide-Modified poly(HEMA-GMA)-Nic Cryogels for Removal of Pesticides

Banana leaf and glucose mineralization and soil organic matter in microhabitats of banana plantations under long‐term pesticide use

Bioremediation and Bioreduction of Dissolved U(VI) by Microbial Mat Consortium Supported on Silica Gel Particles

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