Application of a novel nanocomposites carbon nanotubes functionalized with mesoporous silica-nitrenium ions (CNT-MS-N) in nitrate removal: Optimizations and nonlinear and linear regression analysis

Altowayti, Wahid Ali Hamood; Othman, Norzila; Goh, Pei Sean; Alshalif, Abdullah Faisal; Al-Gheethi, Adel; Algaifi, Hassan Amer

doi:10.1016/j.eti.2021.101428

Cited by 22 publications

(15 citation statements)

References 63 publications

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“…pH has been shown in several studies to have a substantial influence on heavy metal adsorption [31,32,34]. The adsorptive process is affected by changes in initial pH due to the dissociation of functional groups on the active sites on the D-WMR's surface.…”

Section: Factors Affection Adsorption Capacity 321 Effect Of Ph Against Zinc Removalmentioning

confidence: 99%

“…The nonlinear and linear isotherm equation parameters' correlations were examined and discussed. The Langmuir models' nonlinear and linear equations are as follows [34,63]: Langmuir Nonlinear:…”

Section: Isotherm Modelsmentioning

confidence: 99%

“…Because of their simplicity and utility in predicting the likely mechanism of adsorption data, linear forms were usually used to calculate isotherms and kinetics parameters. Nonlinear isotherm and kinetics models are converted to linear form, causing distortion in the linear least squares methodology [34]. It was not possible to verify the linearity of the data with these linear equations, because they presume that the data shown is linear in nature.…”

Section: Selecting the Optimum Isotherm Model Based On Error Functions Analysismentioning

confidence: 99%

“…It is also crucial to conduct thermodynamic experiments in order to ascertain whether the adsorption is spontaneous. In addition, it gives information about the optimal temperature range for adsorption and the type of adsorbent and adsorbate at equilibrium [33,34].…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Zn2+ from Synthetic Wastewater Using Dried Watermelon Rind (D-WMR): An Overview of Nonlinear and Linear Regression and Error Analysis

et al. 2021

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Sustainable wastewater treatment is one of the biggest issues of the 21st century. Metals such as Zn2+ have been released into the environment due to rapid industrial development. In this study, dried watermelon rind (D-WMR) is used as a low-cost adsorption material to assess natural adsorbents’ ability to remove Zn2+ from synthetic wastewater. D-WMR was characterized using scanning electron microscope (SEM) and X-ray fluorescence (XRF). According to the results of the analysis, the D-WMR has two colours, white and black, and a significant concentration of mesoporous silica (83.70%). Moreover, after three hours of contact time in a synthetic solution with 400 mg/L Zn2+ concentration at pH 8 and 30 to 40 °C, the highest adsorption capacity of Zn2+ onto 1.5 g D-WMR adsorbent dose with 150 μm particle size was 25 mg/g. The experimental equilibrium data of Zn2+ onto D-WMR was utilized to compare nonlinear and linear isotherm and kinetics models for parameter determination. The best models for fitting equilibrium data were nonlinear Langmuir and pseudo-second models with lower error functions. Consequently, the potential use of D-WMR as a natural adsorbent for Zn2+ removal was highlighted, and error analysis indicated that nonlinear models best explain the adsorption data.

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Section: Factors Affection Adsorption Capacity 321 Effect Of Ph Against Zinc Removalmentioning

confidence: 99%

Section: Isotherm Modelsmentioning

confidence: 99%

Section: Selecting the Optimum Isotherm Model Based On Error Functions Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adsorption of Zn2+ from Synthetic Wastewater Using Dried Watermelon Rind (D-WMR): An Overview of Nonlinear and Linear Regression and Error Analysis

et al. 2021

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“…This is not only to conserve water but also to ensure that the water that is needed for people does not include any hazardous bacteria, chemical compounds, or undesired contaminants. Polluted water, such as with chemicals or microorganisms in drinking water, is dangerous to human health and can result in water-borne diseases [5][6][7]. The water distribution systems are mainly divided into three parts: (i) storing water, (ii) purification and water disinfection, and (iii) supply.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Pressure and Loss Behavior in Water Pipes Using Smart Mathematical Modelling

Altowayti

Othman

Tajarudin

et al. 2021

Water

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Due to the constant need to enhance water supply sources, water operators are searching for solutions to maintain water quality through leakage protection. The capability to monitor the day-to-day water supply management is one of the most significant operational challenges for water companies. These companies are looking for ways to predict how to improve their supply operations in order to remain competitive, given the rising demand. This work focuses on the mathematical modeling of water flow and losses through leak openings in the smart pipe system. The research introduces smart mathematical models that water companies may use to predict water flow, losses, and performance, thereby allowing issues and challenges to be effectively managed. So far, most of the modeling work in water operations has been based on empirical data rather than mathematically described process relationships, which is addressed in this study. Moreover, partial submersion had a power relationship, but a total immersion was more likely to have a linear power relationship. It was discovered in the experiment that the laminar flows had Reynolds numbers smaller than 2000. However, when testing with transitional flows, Reynolds numbers were in the range of 2000 to 4000. Furthermore, tests with turbulent flow revealed that the Reynolds number was more than 4000. Consequently, the main loss in a 30 mm diameter pipe was 0.25 m, whereas it was 0.01 m in a 20 mm diameter pipe. However, the fitting pipe had a minor loss of 0.005 m, whereas the bending pipe had a loss of 0.015 m. Consequently, mathematical models are required to describe, forecast, and regulate the complex relationships between water flow and losses, which is a concept that water supply companies are familiar with. Therefore, these models can assist in designing and operating water processes, allowing for improved day-to-day performance management.

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Preparation and application of a surfactant‐modified Halloysite nanotubes for the adsorption of nitrates from aqueous solutions: Kinetic and equilibrium studies

Fizir

Richa

Touil

et al. 2022

Env Prog and Sustain Energy

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The current research proposes the hexadecyltrimethylammonium bromide-modified Algerian halloysite nanotubes (HNTs-CTAB) as adsorbent for nitrate ions removal from aqueous solution via electrostatic interactions. X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), Fouriertransform infrared spectroscopy (FT-IR), and nitrogen adsorption-desorption analysis techniques have been used to characterize the prepared adsorbants. The different operating condition that may affect the adsorption of nitrate was carried out. HNTs and HNTs-CTAB adsorption capacities are considerably pH dependent. The optimum conditions for maximum removal of nitrate from aqueous solution were as follows:adsorbent masse was 40 mg, initial pH was 4, temperature was 25 C, initial nitrate concentration of 100 mg/L and equilibrium time was 3 h. Under optimal value of process parameters, maximum NO 3 À adsorption capacity of 47.4 mg/g was obtained.Kinetic investigation confirmed that the nitrate adsorption on modified HNTs followed a pseudo-second-order with correlation coefficients greater than 0.98 (R 2 = 0.9870) and that empirical Freundlich isotherm was best fitted nitrate equilibrium adsorption. The thermodynamic studies indicated that the adsorption of nitrate onto HNTs-CTAB is endothermic and spontaneous. HNTs-CTAB displayed high regeneration ability by retaining a capacity above 40 mg/g after four reuse cycles.HNTs-CTAB containing plentiful nitrate could be returned to the soil directly as an economic slow release fertilizers or a soil amendment due to its environmentalfriendly performance. Therefore, HNTs-CTAB used for remediation of wastewater might be employed easily as farmland fertilizer.

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Application of a novel nanocomposites carbon nanotubes functionalized with mesoporous silica-nitrenium ions (CNT-MS-N) in nitrate removal: Optimizations and nonlinear and linear regression analysis

Cited by 22 publications

References 63 publications

Adsorption of Zn2+ from Synthetic Wastewater Using Dried Watermelon Rind (D-WMR): An Overview of Nonlinear and Linear Regression and Error Analysis

Adsorption of Zn2+ from Synthetic Wastewater Using Dried Watermelon Rind (D-WMR): An Overview of Nonlinear and Linear Regression and Error Analysis

Evaluating the Pressure and Loss Behavior in Water Pipes Using Smart Mathematical Modelling

Preparation and application of a surfactant‐modified Halloysite nanotubes for the adsorption of nitrates from aqueous solutions: Kinetic and equilibrium studies

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