Integrated remediation for organic-contaminated site by forcing running-water to modify alkali-heat/persulfate via oxidation process transfer

Xu, Quan; Shi, Feng; You, Hong; Wang, Shutao

doi:10.1016/j.chemosphere.2020.128352

Cited by 18 publications

(3 citation statements)

References 44 publications

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“…Benzene has the potential to readily infiltrate the subsurface milieu during various stages of its lifecycle, encompassing production, storage, and transportation. Its inclusion in the U.S. EPA’s National Priorities List is attributed to its well-documented carcinogenic, teratogenic, and mutagenic properties, which are observed in both its liquid and gaseous states ( Xu Q. et al, 2021 ; Agency, 2023 ). Subsurface environmental exposure to benzene has become a global environmental problem ( Singh and Fulekar, 2010 ; Padhi and Gokhale, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Modeling and optimization study on degradation of organic contaminants using nZVI activated persulfate based on response surface methodology and artificial neural network: a case study of benzene as the model pollutant

Luo,

Zhang,

Long

et al. 2023

Front. Chem.

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Due to the complicated transport and reactive behavior of organic contamination in groundwater, the development of mathematical models to aid field remediation planning and implementation attracts increasing attentions. In this study, the approach coupling response surface methodology (RSM), artificial neural networks (ANN), and kinetic models was implemented to model the degradation effects of nano-zero-valent iron (nZVI) activated persulfate (PS) systems on benzene, a common organic pollutant in groundwater. The proposed model was applied to optimize the process parameters in order to help predict the effects of multiple factors on benzene degradation rate. Meanwhile, the chemical oxidation kinetics was developed based on batch experiments under the optimized reaction conditions to predict the temporal degradation of benzene. The results indicated that benzene (0.25 mmol) would be theoretically completely oxidized in 1.45 mM PS with the PS/nZVI molar ratio of 4:1 at pH 3.9°C and 21.9 C. The RSM model predicted well the effects of the four factors on benzene degradation rate (R2 = 0.948), and the ANN with a hidden layer structure of [8-8] performed better compared to the RSM (R2 = 0.980). In addition, the involved benzene degradation systems fit well with the Type-2 and Type-3 pseudo-second order (PSO) kinetic models with R2 > 0.999. It suggested that the proposed statistical and kinetic-based modeling approach is promising support for predicting the chemical oxidation performance of organic contaminants in groundwater under the influence of multiple factors.

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Section: Introductionmentioning

confidence: 99%

Modeling and optimization study on degradation of organic contaminants using nZVI activated persulfate based on response surface methodology and artificial neural network: a case study of benzene as the model pollutant

Luo,

Zhang,

Long

et al. 2023

Front. Chem.

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“…Industrial soil contamination has become a critical issue worldwide due to its potential hazards to public health and ecological environment [1,2]. Spills, leaks, or the illegal dumping of caustic chemicals often result in an abnormal soil pH, which poses acute toxicity to human health and a detrimental effect to the soil ecosystem [3,4].…”

Section: Introductionmentioning

confidence: 99%

Neutralization of Industrial Alkali-Contaminated Soil by Different Agents: Effects and Environmental Impact

et al. 2022

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Industrial soil is susceptible to acid or alkali pollution, but studies focused on the remediation of such soil are still limited. This manuscript investigated the neutralization effect of five agents (hydrochloric acid, citric acid, ferrous sulfate, calcium superphosphate and raw gypsum) to alkali polluted soil. The results showed that regarding the initial pH after the neutralizing agent addition, it was better to set it lower than the target, as the pH would rebound. None of the five agents caused an obvious increase in the heavy metal contents of the leachates, but they all caused an increase in electrical conductivity, which indicated an increase in soil salinity. The leachates showed a luminous gain to Vibrio fischeri. However, remediation with hydrochloric acid would cause significant inhibition of germination and root elongation of pakchoi. In addition, the addition of neutralizing agents reshaped the soil microbial community structure in different patterns. Soils treated with hydrochloric acid and ferrous sulfate seemed to improve the microbial richness. The neutralization might be favorable for the biodegradation of polycyclic aromatic hydrocarbons (PAHs), which usually coexist in industrial contaminated soil. In general, the neutralization of alkaline industrial soils using ferrous sulfate, superphosphate and gypsum brought minimal environmental risk, among which ferrous sulfate was the first recommendation in industrial soil after a comprehensive comparison.

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“…(2) ; heat, Eq. (3) [9] ; photo-; electro-; microwave; and US, Eq. (4) ), metal-free catalysis [10] , metal-based materials (e.g.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic role to activate persulfate/chlorite with foamed zero-valent-iron: Sonochemical applications and induced mechanisms

Zhang

Leng

et al. 2021

Ultrasonics Sonochemistry

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Highlights The novel foamed-ZVI activating persulfate/chlorite by ultrasonic was applied. The real-time and online continuous detections tracked radicals transformation. The EPR spectra with different systems in different mixtures were detected. The free or non-free radicals processes induced by US were explored. The dynamics on cavitation and the US-field simulation were presented.

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Integrated remediation for organic-contaminated site by forcing running-water to modify alkali-heat/persulfate via oxidation process transfer

Cited by 18 publications

References 44 publications

Modeling and optimization study on degradation of organic contaminants using nZVI activated persulfate based on response surface methodology and artificial neural network: a case study of benzene as the model pollutant

Modeling and optimization study on degradation of organic contaminants using nZVI activated persulfate based on response surface methodology and artificial neural network: a case study of benzene as the model pollutant

Neutralization of Industrial Alkali-Contaminated Soil by Different Agents: Effects and Environmental Impact

Ultrasonic role to activate persulfate/chlorite with foamed zero-valent-iron: Sonochemical applications and induced mechanisms

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