Enhancing Metolachlor Destruction Rates with Aluminum and Iron Salts during Zerovalent Iron Treatment

Satapanajaru, Tunlawit; Comfort, Steve D.; Shea, P. J.

doi:10.2134/jeq2003.1726

Cited by 59 publications

(63 citation statements)

References 46 publications

(73 reference statements)

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“…Ainda com base nas Figuras 2 e 3, nota-se claramente para alguns compostos uma reação de pseudo-primeira ordem em relação ao substrato, especialmente nas primeiras horas de reação. Comportamento este já observado por diversos autores 13,16,17,24 . Em termos de degradação, o único composto que resiste à redução é o clorofórmio, que segundo relato 25 é muito recalcitrante em ambientes redutores.…”

Section: Resultsunclassified

Tratamento de água subterrânea contaminada com compostos organoclorados usando ferro elementar e o reagente de Fenton

Arruda¹,

Jardim²

2007

Quím. Nova

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Recebido em 1/9/06; aceito em 15/2/07; publicado na web em 30/7/07 TREATMENT OF GROUNDWATER CONTAMINATED WITH CHLORINATED COMPOUNDS USING ELEMENTAL IRON AND FENTON'S REAGENT. The remediation of groundwater containing organochlorine compounds was evaluated using a reductive system with zero-valent iron, and the reductive process coupled with Fenton's reagent. The concentration of the individual target compounds reached up to 400 mg L -1 in the sample. Marked reductions in the chlorinated compounds were observed in the reductive process. The degradation followed pseudo-first-order kinetics in terms of the contaminant and was dependent on the sample contact time with the solid reducing agent. An oxidative test with Fenton's reagent, followed by the reductive assay, showed that tetrachloroethylene was further reduced up to three times the initial concentration. The destruction of chloroform, however, demands an additional treatment.

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Section: Resultsunclassified

Tratamento de água subterrânea contaminada com compostos organoclorados usando ferro elementar e o reagente de Fenton

Arruda¹,

Jardim²

2007

Quím. Nova

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“…Less than 5 g of filter material and/or 40 g of test solution were used in some batch tests in order to accommodate the limited 50 mL volume of the centrifuge tubes. The predominant filter material to solution ratio (1:8 by weight) employed for this investigation was chosen based on the filter material to solution ratios used in previous batch test studies [50][51][52][53]. The filter material and solution were thoroughly mixed by placing the centrifuge tube containing filter material and solution on a laboratory rotator (Mini LabRoller Rotator, Labnet International, Inc., Woodbridge, NJ, USA) operated at 20 rpm ( Figure 1 solution were centrifuged at 2500 rpm (800 g) for 10 min in order to separate the filter material from the solution.…”

Section: Batch Test Screening Proceduresmentioning

confidence: 99%

Batch Test Screening of Industrial Product/Byproduct Filter Materials for Agricultural Drainage Water Treatment

Allred

2017

Water

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Filter treatment may be a viable means for removing the nitrate (NO 3 − ), phosphate (PO 4 3− ), and pesticides discharged with agricultural drainage waters that cause adverse environmental impacts within the U.S. on local, regional, and national scales. Laboratory batch test screening for agricultural drainage water treatment potential was conducted on 58 industrial product/byproduct filter materials grouped into six categories: (1) high carbon content media; (2) high iron content media; (3) high aluminum content media; (4) surfactant modified clay/zeolite; (5) coal combustion residuals; and (6) spent foundry sands. Based on a percent contaminant removal criteria of 75% or greater, seven industrial products/byproducts were found to meet this standard for NO 3 − alone, 44 met this standard for PO 4 3− , and 25 met this standard for the chlorinated triazine herbicide, atrazine. Using a 50% or greater contaminant removal criteria, five of the industrial product/byproduct filter materials exhibited potential for removing NO 3 − , PO 4 3− , and atrazine together; eight showed capability for combined NO 3 − and PO 4 3− removal; 21 showed capability for combined PO 4 3− and atrazine removal; and nine showed capability for combined NO 3 − and atrazine removal. The results of this study delineated some potential industrial product/byproduct filter materials for drainage water treatment; however, a complete feasibility evaluation for drainage water treatment of any of these filter materials will require much more extensive testing.

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“…Adding Al salts to Fe 0 increases the rate of organic contaminant removal [38,70,71]. Adding Cu 0 to Fe 0 increases the rate of metal and nitrate contaminant removal [42].…”

Section: Space Velocitymentioning

confidence: 99%

Sustainable Zero-Valent Metal (ZVM) Water Treatment Associated with Diffusion, Infiltration, Abstraction, and Recirculation

Antia¹

2010

Sustainability

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Socio-economic, climate and agricultural stress on water resources have resulted in increased global demand for water while at the same time the proportion of potential water resources which are adversely affected by sodification/salinisation, metals, nitrates, and organic chemicals has increased. Nano-zero-valent metal (n-ZVM) injection or placement in aquifers offers a potential partial solution. However, n-ZVM application results in a substantial reduction in aquifer permeability, which in turn can reduce the amount of water that can be abstracted from the aquifer. This study using static diffusion and continuous flow reactors containing n-ZVM and m-ZVM (ZVM filaments, filings and punchings) has established that the use of m-ZVM does not result in a reduction in aquifer permeability. The experimental results are used to design and model m-ZVM treatment programs for an aquifer (using recirculation or static diffusion). They also provide a predictive model for water quality associated with specific abstraction rates and infiltration/injection into an aquifer. The study demonstrates that m-ZVM treatment requires 1% of the weight required for n-ZVM treatment for a specific flow rate. It is observed that 1 t Fe 0 will process 23,500 m 3 of abstracted or infiltrating water. m-ZVM is able to remove >80% of nitrates from flowing water and adjust the water composition (by reduction) in an aquifer to optimize removal of nitrates, metals and organic compounds. The experiments demonstrate that ZVM treatment of an aquifer can be used to reduce groundwater salinity by 20 -> 45% and that an aquifer remediation program can be designed to desalinate an aquifer. Modeling indicates that widespread application of m-ZVM water treatment may reduce global socio-economic, climate and agricultural stress on water resources. The rate of oxygen formation during water reduction OPEN ACCESSSustainability 2010, 2 2989[by ZVM (Fe 0 , Al 0 and Cu 0 )] controls aquifer permeability, the associated aquifer pH, aquifer Eh and the degree of water treatment that occurs.

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Enhancing Metolachlor Destruction Rates with Aluminum and Iron Salts during Zerovalent Iron Treatment

Cited by 59 publications

References 46 publications

Tratamento de água subterrânea contaminada com compostos organoclorados usando ferro elementar e o reagente de Fenton

Tratamento de água subterrânea contaminada com compostos organoclorados usando ferro elementar e o reagente de Fenton

Batch Test Screening of Industrial Product/Byproduct Filter Materials for Agricultural Drainage Water Treatment

Sustainable Zero-Valent Metal (ZVM) Water Treatment Associated with Diffusion, Infiltration, Abstraction, and Recirculation

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