Inhibitive Effect of Glutaraldehyde on the Corrosion of Aluminum in Hydrochloric Acid Solution

The inhibition effect of glutaraldehyde on the corrosion of aluminum in 1.4 M HCl solution at 308-318 K was investigated by using weight loss method and characterized by Fourier Transform Infrared Spectroscopy (FTIR) & Scanning Electron Microscopic Analysis (SEM). The results show that the inhibition efficiency increases with increasing inhibitor concentration and decreases with rising temperature. The activation energy value was 20.48 kJ mol-1 for the uninhibited acid solution which increased to 33.79 kJ mol-1 in the presence of 0.1 M inhibitor concentration. Langmuir adsorption isotherm was found to provide an accurate description of the adsorption behavior of the investigated inhibitor. The thermodynamic parameters such as adsorption equilibrium constant (Kads), free energy of adsorption (ΔGads), heat of adsorption (ΔHads) and entropy of adsorption (ΔSads) have been calculated and discussed in detail

Inhibitive Effect of Glutaraldehyde on the Corrosion of Aluminum in Hydrochloric Acid Solution

The inhibition effect of glutaraldehyde on the corrosion of aluminum in 1.4 M HCl solution at 308-318 K was investigated by using weight loss method and characterized by Fourier Transform Infrared Spectroscopy (FTIR) & Scanning Electron Microscopic Analysis (SEM). The results show that the inhibition efficiency increases with increasing inhibitor concentration and decreases with rising temperature. The activation energy value was 20.48 kJ mol-1 for the uninhibited acid solution which increased to 33.79 kJ mol-1 in the presence of 0.1 M inhibitor concentration. Langmuir adsorption isotherm was found to provide an accurate description of the adsorption behavior of the investigated inhibitor. The thermodynamic parameters such as adsorption equilibrium constant (Kads), free energy of adsorption (ΔGads), heat of adsorption (ΔHads) and entropy of adsorption (ΔSads) have been calculated and discussed in detail

Modeling and Equilibrium Studies for the Adsorption of Congo red Using Detarium microcarpum Seed Shell Activated Carbon

Activated carbon obtained from Detarium microcarpum seed shell (SDAC) was used to eliminate congo red (CR) from an aqueous solution using batch adsorption method. Various characterization techniques, including SEM, FT-IR and pH at point of zero charge (pHpzc) were employed to characterize the adsorbent surface. The study investigated several adsorption parameters, namely contact time (5 - 150 minutes), temperature (303 - 323 K), and initial concentration (20 - 500 mg/L). The adsorption data were analyzed using kinetic, isotherm, and thermodynamic equations. The kinetics of the process conformed well to the pseudo-second-order model, indicating that both external and internal diffusion influenced the adsorption of the dye onto the adsorbent. The isotherm data aligned with the Freundlich model, suggesting that CR formed multiple layers on the heterogeneous surface of the adsorbent. The values of thermodynamic calculations ∆S = -0.139 kJ/mol, ∆H = - 48.77 kJ/K demonstrates the feasibility and exothermic nature of the dye adsorption process and the values of ∆G = -6.52, -5.82, -5.12, -4.42 and -3.73 kJ/mol  obtained at various temperature confirmed the spontaneity of the entire adsorption process

Combined Computational and Experimental Studies for the Removal of Anionic Dyes using Activated carbon drive from Agricultural Waste

In recent years, there has been a growing interest among researchers in combining experimental and theoretical approaches to elucidate interactions between adsorbates and adsorbents. This study focuses on investigating the adsorption behavior of two anionic dyes, methyl orange (MO) and congo red (CR), on a sustainable adsorbent derived from sweet detar seed shell activated carbon. Additionally,to provide an explanation for the adsorption mechanisms using Density Functional Theory (DFT) calculations. The environmentally-friendly sweet detar seed shell activated carbon is synthesized and thoroughly characterized through various analytical techniques such as FTIR, SEM and pHpzc The experimental results for adsorption equilibrium demonstrate that the adsorption of both dyes conforms well to the Freundlich adsorption model. The maximum adsorption capacities are determined to be revealing a maximum adsorption capacity of 49.02 mg g−1 for MO and 38.91 mg g−1 for CR at. Furthermore, the kinetic data fits effectively with the pseudo-second-order kinetic model for both dyes, showing a coefficient of determination (R²) close to unity and experimental qe values for MO and CR, 9.52 and 9.43 mg/g are close to calculated values 9.62 and 9.43 mg/g. Additionally, quantum chemical parameters indicate a stronger interaction between the MO molecule and adsorbent surface framework compared to CR. These computaional results are consistent with the experimental findings, underscoring the accuracy and applicability of the calculations

Kinetic and Thermodynamic evaluation on Removal of Anionic Dye from Aqueous Solution using Activated Carbon Derived from Agricultural Waste: Equilibrium and Reusability Studies

Nowadays, the presence of dye in aqueous solutions is a major environmental concern. Activated carbon of ginger bread plum (GBPA) was studied as agricultural wastes derived adsorbent for the removal of methyl orange (MO) from aqueous solutions using batch adsorption technique. The adsorbent was characterized using point of zero charge (PZC), Scanning Electron microscopy (SEM) and Fourier Transform Infra-Red (FTIR) spectroscopy. Batch adsorption experiments were conducted to elucidate the impact of experimental parameters such contact time (5 – 150 minutes), adsorbent dosage (0.1 – 0.6g), particle size (75 - 900 µm), initial dye concentration (20 – 500 mg/L), pH (2 -12) and temperature (303 – 323 K). Pseudo-first order and pseudo-second order were used to described the kinetic behavior of the process and the data from the experimental result accord with pseudo second order with R2 = 0.9999. The equilibrium data was also computed using Langmuir, Temkin, Freundlich, and D-R models and was found to follow Freundlich adsorption isotherm. Thermodynamics studied parameters such as change in enthalpy (ΔH), entropy (ΔS) and Gibbs free energy of adsorption (ΔG) clearly indicates that the adsorption process was feasible endothermic and spontaneous in nature. Desorption was performed using various eluent and reusability of the adsorbent was done in five successive cycles

Study of corrosion inhibition of Aluminum in nitric acid solution using Anisaldehyde (4-methoxy benzaldehyde) as corrosion inhibitor

The inhibitive action of Anisaldehyde (4–methoxy benzaldehyde) on corrosion of Aluminum in nitric acid solution was studied through weight loss method. Fourier Transform Infrared Spectroscopic Analysis (FTIR) was used to characterize the inhibitor and the corrosion product. The effect of different inhibitor concentrations was studied at 308, 313 and 318 K. The present study showed that the percentage of inhibition efficiency (% I.E.) is enhanced with increase of inhibitor concentration and decrease with rising in temperature. Maximum I.E. of Anisaldehyde was found 86.32 % at 308 K and 0.1M inhibitor concentration in 1.4M HNO3 solution. The inhibitive action of the inhibitor is discussed in view of adsorption of Anisaldehyde molecule on the metal surface. It was found that the adsorption of the inhibitor on the metal surface follows Langmuir adsorption isotherm. Activation parameters governing the adsorption process were evaluated and discussed in detail. Cite as: Husaini, M., Usman, B., Ibrahim, M. B. (2019). Study of corrosion inhibition of Aluminum in nitric acid solution using Anisaldehyde (4 - methoxy benzaldehyde) as inhibitor. Algerian Journal of Engineering and Technology, 1(1), 011-018. http://dx.doi.org/10.5281/zenodo.3595126 &nbsp

Study of corrosion inhibition performance of Glutaraldehyde on Aluminium in nitric acid solution

The inhibition effect of glutaraldehyde on the corrosion behavior of aluminium in 1.4 M nitric acid solution was studied using weight loss method, adsorption studies and characterized instrumentally by Fourier Transform Infrared Spectroscopic (FT-IR) analysis. The effects of inhibitor concentration, temperature and surface coverage were all investigated. The effect of inhibitor concentration and other parameters were evaluated for different inhibitor concentrations and the probable mechanism for the studied inhibitor was also proposed. The results showed that glutaraldehyde possess an excellent inhibiting effect toward the corrosion of aluminium in nitric acid solution with highest inhibition efficiency of 84.68, 81.34 and 76.87 % at 308, 313 and 318 K in the presence of 0.1 M inhibitor concentration. The values of the activation energy, rate constant, half-life and rate constant in uninhibited acid solution were 31.84 kj mol-1, 3.9 k ×10-3 hr-1 and 1.76 × 102 hr which changed to 57.64 kj mol-1, 0.60 k ×10-3 hr-1 and 11.55 hr in the presence of 0.1 M inhibitor concentration. The positive values of enthalpy reflect the endothermic nature of the reaction. The negative values of entropy (ΔS) signified that the activated complex in the rate determining step represented an association, rather than dissociation. The adsorption of the inhibitor on the metal surface followed Langmuir adsorption isotherm. Cite as:Husaini M, Usman B, Ibrahim MB. Study of corrosion inhibition performance of Glutaraldehyde on Aluminium in nitric acid solution. Alg. J. Eng. Tech. 2020; 2: 003-010. http://dx.doi.org/10.5281/zenodo.3923029 References Obot IB, Obi-Egbedi NO, Umoren SA, Ebenso EE. 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Evaluation of corrosion behaviour of aluminum in different environment

The corrosion behaviour of aluminum in hydrochloric, nitric, sulfuric and phosphoric acids was investigated using weight loss method. The results shows that the corrosion rate of aluminium in HCl, H3PO4, H<2SO4 and HNO3 are 39.1200, 1.5000, 0.7111 and 0.6500 mg cm-2h-1 respectively. The corrosion rate was found to increase with increase in concentration and temperature. The thermodynamic and kinetic parameters were evaluated and enthalpy AH was found to be positive indicating the endothermic nature of the reactions. The study further reveals that the rate of corrosion in different environment follows the following order. HCl > H3PO4 > H<2SO4 > HNO3Keywords: aluminum, weight loss, corrosion rate, thermodynamic and kinetic parameter