Bagasse Fly Ash as an Effective Adsorbent: Evaluation of Adsorptive Characteristics for 4-Nitroaniline Removal

In the present study we explored the adsorptive characteristics of 4-nitroaniline from synthetic aqueous solution onto bagasse fly ash (BFA). Batch experiments were carried out to determine the influence of parameters like initial pH (pH0), adsorbent dose (m), contact time (t) and initial concentration (C0) on the removal of 4-nitroaniline. The maximum removal of 4-nitroaniline was determined to be 98% at lower concentrations (50 mg/L) and 41% at higher concentrations (300 mg/L), using a BFA dosage of 10 g/L at 303K. Kinetic study of 4-nitroaniline removal by BFA was well represented by pseudo second-order kinetic model. The 4-nitroaniline desorption from 4-nitroaniline loaded BFA shows that only 27% and 36% of 4-nitroaniline could be recovered using ethyl alcohol and acetone respectively.

Microwave and fusion techniques for the synthesis of mesoporous zeolitic composite adsorbents from bagasse fly ash: sorption of p-nitroaniline and nitrobenzene

Abstractp-Nitroaniline (PNAN) and nitrobenzene (NB) being important raw materials and intermediates for the production of a wide range of chemical products have the potential of constituting water pollutants. Hence, the development of the means of removing these chemicals from water would go a long way to safeguard the health of the environment. The goal of this research was to transform bagasse fly ash (BFA), solid waste from the sugar industry into porous zeolitic adsorbents MgFZBFA and MgMZBFA and examine them for their adsorptive removal of PNAN and NB from aqueous solutions. The syntheses of the sorbents involve alkali fusion technique and microwave hydrothermal treatment for the desired properties. Advanced characterization techniques such as FTIR (Fourier transform infrared spectroscopy), XRF (X-ray fluorescence spectroscopy), XRD (X-ray diffraction spectroscopy), SEM (scanning electron microscopy), Brunauer–Emmett–Teller (BET)/Barrett–Joyner–Halenda (BJH) Method, and TGA (thermogravimetric analysis) were used for the characterization and evaluation of the sorbents’ properties. The adsorptive removal of PNAN and NB from aqueous solutions by MgFZBFA and MgMZBFA were investigated. Various parameters such as pH, adsorbent dosage, initial sorbate concentration were optimized during the adsorption experiment to achieve best performance. Adsorption isotherm, kinetics and dynamics were studied. It was found that Langmuir adsorption isotherm model better represents the adsorption processes and that the processes follow pseudo-second-order kinetics. More so, the sorption processes were most possibly completed by both surface sorption (liquid-film diffusion) and intra-particle diffusion. The maximum sorption capacities observed with MgFZBFA for PNAN and NB are 30.86 mg g−1 and 19.92 mg g−1, while with MgMZBFA the values are 12.72 mg g−1 and 10.20 mg g−1, respectively. The performances of MgFZBFA and MgMZBFA for the sorption of PNAN and NB were compared with some adsorbents previously studied for the same purpose, and results show that the adsorbents in the present study exhibit better performances. The application as materials of cheap source for the removal of PNAN and NB from contaminated water could be considered.

Mechanical Characteristics and Corrosion Characteristics of Fly Ash Particulates of Bagasse Reinforced Al 6061 Composite Materials

Recently, composite materials are among the most prospective substances. The improved characteristics were possessed by Metal matrix composites (MMCs) but which is low in comparison to plain composites. Due to low cost and density, nowadays composite materials most trendy one. Therefore, composite materials reinforced with fly ash particulate of bagasse fly ash will probably overcome the barrier of expense in the applications of small motor and automobile industry. In the current study, a technique of stir casting has been utilized to prepare reinforcement of AL6061 alloy with 5 wt% to 25 wt% of fly ash particulate matter of bagasse fly ash. In this study, the identification of phase and characterization of structures was performed with the help of analysis of diffraction in the X-ray on the fly ash particulate matter of bagasse. The analysis of microstructure was performed with the help of optical microscopy and Scanning electron microscopy. The test like pitting corrosion, compression and hardness have been performed on composite materials and light metal. The analysis of SEM demonstrates that in the matrix stage, there is a homogeneous distribution of fly ash particulates of bagasse and also excellent adhesion is existing among reinforcement and matrix. The hardness, pitting corrosion and compressive strength were improved, and the density of the composite materials was decreased when there is an improvement in the number of fly ash particulates of bagasse. The enhanced pitting corrosion of reinforcement of aluminum alloy with fly ash particulates of bagasse is related to the initiation of the nobler second stage of fly ash particulate matter

Environmental valorisation of bagasse fly ash: a review

Worldwide, each year the sugar industry generates bagasse fly ash (BFA) in the process of producing sugar including ethanol and jaggery.

Effectiveness of Rice Husk and Bagasse Fly Ash as Adsorbent of Cr Metal on Batch System

<p>This study aimed to utilize rice husk and bagasse fly ash as Cr metal adsorbent. In this study, the adsorption used batch system. The steps of research were preparation of materials, activation of materials with HCl and NaOH solutions, characterization test using SEM, FTIR and AAS. Determination of optimum condition of Cr metal adsorption on variation of adsorbent composition, adsorbent mass, adsorbate concentration and isotherm adsorption study. The result showed that the adsorbent of rice husk and bagasse fly ash can be used as adsorbent because there were pores that is based on SEM analysis, based on FTIR results that there were a –OH (hydroxyl) functional group at wavenumber 3424.76 cm^-1 and Si-O from Si-O-Si (siloxane) functional group at wavenumber 1048.36 cm^-1 in the combination of rice husk and bagasse fly ash adsorbent, based on AAS results it was found that the optimum composition ratio of rice husk and bagasse fly ash adsorbent was 1:2 with the percentage of Cr adsorbed 98.90%, the optimum adsorbent mass at 0.2 g with the percentage of Cr adsorbed 99.77% and the optimum adsorbate concentration at 20.645 mg/L with the percentage of Cr adsorbed 99.63%. The pattern of adsorption isotherm tends followed the Langmuir isotherm which means the adsorption process chemically.</p>