Scenario-based modelling of mass transfer mechanisms at a petroleum contaminated field site-numerical implications

Vasudevan, M.; Nambi, Indumathi M.; Kumar, G. Suresh

doi:10.1016/j.jenvman.2016.03.009

Cited by 13 publications

(5 citation statements)

References 25 publications

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“…Various contaminants in the solution introduce a complex interplay affecting ion diffusion and the driving forces to reach the active sites. Depending on the specific interactions, this complexity can lead to antagonistic or synergistic mechanisms. , Several critical factors are considered to understand model mechanisms, including molecular size, ionic radii, hydrated radii, and diffusivities, which influence the competition among different species within the solution. The interaction between the adsorbent surface and the mobility of adsorbates toward active sites is addressed by this model.…”

Section: Methodsmentioning

confidence: 99%

Development of a Multicomponent Adsorption Isotherm Equation and Its Validation by Modeling

Acharya,

Jeppu,

Raju Girish

et al. 2023

Langmuir

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Researchers have made significant efforts over the past few decades to understand adsorption by developing various simple adsorption isotherm models. However, though many contaminants usually occur as multicomponent mixtures in nature, multicomponent adsorption isotherms have received limited attention and remain an area of inadequate research. We have presented here in a new multicomponent adsorption isotherm model, named the Jeppu Amrutha Manipal Multicomponent (JAMM) isotherm, that can alleviate this problem. We first developed the JAMM multicomponent isotherm using our experimental data sets of arsenic and fluoride competitive adsorption on activated carbon. We then tested the JAMM multicomponent isotherm for a case study of cadmium and zinc competitive adsorption. Next, we further assessed the JAMM isotherm using another competitive adsorption case study of copper and chromium. Through extensive validation studies and error analysis, the JAMM isotherm was able to demonstrate its efficacy in predicting the adsorption behavior in several multicomponent adsorption systems accurately. The main advantage of JAMM isotherm over other multicomponent isotherms is that it utilizes and leverages the single-component adsorption parameters to simulate multicomponent isotherms. The proposed JAMM analytical isotherm model furthermore incorporates the interaction between the components, a mole fraction parameter, and a heterogeneity index, providing a more comprehensive modeling framework for multicomponent adsorption. The mole fraction term was introduced for the distribution of adsorption sites based on the relative number of molecules of each component. An additional term for interaction coefficient was introduced for the representation of interactions. During the validation of JAMM with three experimental case studies with negligible, small, and high competition systems of adsorbates, impressive predictions were exhibited, with the average normalized absolute percentage error as 6.05% and average R 2 as 0.86, highlighting the model’s robustness, versatility, and reliability. We propose that the new JAMM isotherm modeling framework might profoundly help in chemical engineering, environmental engineering, and materials science applications by providing a potent tool for analyzing and predicting multicomponent adsorption systems.

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Section: Methodsmentioning

confidence: 99%

Development of a Multicomponent Adsorption Isotherm Equation and Its Validation by Modeling

Acharya,

Jeppu,

Raju Girish

et al. 2023

Langmuir

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“…When volatile organic compounds are present in porous media, they exhibit an inherent delay effect [45,46]. It is not convenient to analyze the mass transfer, but the adsorption kinetics can be calculated.…”

Section: Adsorption Kinetics Of Ldhs With Different Solventmentioning

confidence: 99%

The role of layered double hydroxides shell in enhancing the adsorption capacity of NaY zeolite for toluene in wet conditions

Li,

Yin,

et al. 2024

Environmental Engineering Research

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Surface modification of zeolite is known to enhance its adsorption capacity for volatile organic compounds (VOCs). In this study, a hydrophobic adsorbent, NaY@LDHs, with layered double hydroxides (LDHs) as the shell and NaY zeolite as the core, was successfully synthesized. It was found that treating LDHs with ethanol can result in a larger specific surface area and pore volume, enhancing the adsorption performance of toluene under wet conditions. SEM imaging reveals that the LDHs shell grows vertically on the surface of the NaY zeolite. The dynamic adsorption experiment of toluene showed that under humid conditions, NaY@LDHs exhibited a saturated adsorption capacity of 32.42 mg/g, representing a significant 87% increase compared to the parent NaY zeolite. The kinetic results show that the adsorption of toluene on NaY@LDHs is primarily physical adsorption, and other factors influence the adsorption process in addition to intraparticle diffusion. Therefore, the air layer formed by the LDHs shell on the surface of NaY zeolite imparts a hydrophobic effect, making NaY@LDHs a promising material for adsorbing volatile organic compounds in a wet environment.

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“…In-vessel reactors are widely used for laboratory experiments on petroleum sludge bioremediation [77]. Successful in situ bioremediation of olive mill waste (OMW) utilized various techniques like biowaste, animal waste, and vermicomposting, effectively degrading phenol compounds [189]. An evaporation pond bioremediation experiment employed a microbial-fungal consortium isolated from OMW [8].…”

Section: Bioreactorsmentioning

confidence: 99%

“…Additional time was needed for in-vessel pyrene-contaminated soil remediation. Various methods, like open-vessel and static pile, yielded efficient results in removing contaminants [189].…”

Section: Bioreactorsmentioning

confidence: 99%

Advancing Eco-Sustainable Bioremediation for Hydrocarbon Contaminants: Challenges and Solutions

Alaidaroos

2023

Processes

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In an era of rising population density and industrialization, the environment confronts growing challenges. Soil, agricultural land, and water bodies are becoming increasingly polluted by petroleum waste and hydrocarbons. While hydrocarbons are naturally present in crude oil, refining processes compound the complexity and toxicity of hydrocarbons. This is particularly evident in polycyclic aromatic hydrocarbons (PAHs) found in the air and soil, known for their carcinogenic, mutagenic, and teratogenic properties. In response, biodegradation emerges as an eco-friendly, cost-effective solution, especially in petroleum-contaminated settings. Biodiverse microbial communities play a pivotal role in managing hydrocarbon contamination, contingent on location, toxicity, and microbial activity. To optimize biodegradation, understanding its mechanisms is essential. This review delves into varied bioremediation techniques, degradation pathways, and the contributions of microbial activities to efficiently removing hydrocarbon pollutants. Recent research spotlights specific microorganisms like bacteria, microalgae, and fungi adept at hydrocarbon degradation, offering a contemporary perspective on petroleum hydrocarbon pollutant bioremediation. These microorganisms efficiently break down petroleum hydrocarbons, with enzymatic catalysis markedly accelerating pollutant breakdown compared to conventional methods. Given the intricate nature of hydrocarbon contamination, cooperative bacterial consortia are instrumental in effective cleanup, driven by specific genes guiding bacterial metabolism. For cost-effective and efficient removal from compromised environments, it is advisable to adopt an integrated approach that combines biostimulation and bioaugmentation.

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Scenario-based modelling of mass transfer mechanisms at a petroleum contaminated field site-numerical implications

Cited by 13 publications

References 25 publications

Development of a Multicomponent Adsorption Isotherm Equation and Its Validation by Modeling

Development of a Multicomponent Adsorption Isotherm Equation and Its Validation by Modeling

The role of layered double hydroxides shell in enhancing the adsorption capacity of NaY zeolite for toluene in wet conditions

Advancing Eco-Sustainable Bioremediation for Hydrocarbon Contaminants: Challenges and Solutions

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