Chemical Engineering Commons^™

Removal Of Carbamazepine From Drinking Water, Zachary Wiese

Chemical Engineering Undergraduate Honors Theses

Due to the increasing prevalence of prescription medication over the past few

decades, pharmaceuticals have accumulated in various water sources. This has become a

public health concern because many pharmaceuticals have limited research on the effects

of chronic low-level exposure. According to the World’s Health Organization (WHO),

traces of pharmaceuticals products have been reported in different water sources such as

surface waters, wastewater, groundwater, and drinking water.[1] One pharmaceutical of

interest that has been detected in water sources is carbamazepine. Carbamazepine is a

common pharmaceutical prescribed for the treatment of seizure disorders, neuropathic

pain, and various psychological disorders. It’s mechanism …

Mixed Surfactant Systems: Thermodynamics And Applications In Metal Oxide Imprinting, Suvid Joshi

Theses and Dissertations--Chemical and Materials Engineering

In this work we study mixtures of cationic surfactant (CTAB) and sugar based surfactant(s) (octyl beta-D-glucopyranoside (C8G1), dodecyl maltoside (C12G2) and octyl beta-D-xylopyranoside (C8X1)) to understand the non-ideal thermodynamic behavior of the mixtures of cationic and non-ionic surfactants in water and synthesis of imprinted materials. The thermodynamics of micellization, mixing and dilution of these systems are studied using Isothermal Titration Calorimetry (ITC) and the experimental data obtained are modeled with a pseudo-phase separation model with non-ideal mixing described by regular solution theory. It is shown that a model accounting for enthalpy of demicellization and enthalpy of dilution based on McMillan-Mayer …

Sorption Mechanism Of Anionic Dyes On Pecan Nut Shells (Carya Illinoinensis) Using Batch And Continuous Systems, Ismael A. Aguayo-Villarreal, Luis A. Ramírez-Montoya, Virginia Hernández-Montoya, Adrian Bonilla-Petriciolet, Miguel A. Montes-Morán, Elsa M. Ramírez-López

Adrian Bonilla-Petriciolet

The biomass derived from pecan nut processing (Carya illinoinensis) fro alimentary purpose, specifically the pecan shells were used in this work as a biosorbent of acid blue 74 (AB74), acid blue 25 (AB25) and reactive blue 4 (RB4). This biomass was characterized by ultimate and proximate analysis. FT-IR spectroscopy, X-ray diffraction and SEM/EDX. Adsorption studies were performed in batch and continuous systems and adsorption kinetics, isotherms and breakthrough curves were experimentally determined. Results obtained suggest that the calcium compounds occurring in pecan shells are responsible of the favorable adsorption of anionic dyes, specifically for the removal of AB74. Biosorption results …

Optimizing The Removal Of Fluoride From Water Using New Carbons Obtained By Modification Of Nut Shell With A Calcium Solution From Egg Shell, Virginia Hernandez-Montoya, Luis A. Ramirez-Montoya, Adrian Bonilla-Petriciolet, Miguel A. Montes-Moran

Adrian Bonilla-Petriciolet

Carbons loaded with specific chemical moieties were prepared from pecan nut shells employing a natural modifier agent obtained from egg shell, which is rich in calcium, for the selective adsorption of fluoride from water. A L4 orthogonal array of the Taguchi method was used to optimize the synthesis conditions for obtaining these selective carbons. The samples obtained were characterized and the elemental composition, textural parameters and morphology were determined. Fluoride adsorption experiments were performed in synthetic and real groundwater samples. Results showed that carbons obtained from pecan nut shells modified with a calcium solution extracted from egg shells (CMPNS) were …

Role Of The Pericarp Of Carya Illinoinensis As Biosorbent And Precursor Of Activated Carbon For The Removal Of Lead And Acid Blue 25 In Aqueous Solution, Virginia Hernández-Montoya, Didilia I. Mendoza-Castillo, Adrian Bonilla-Petriciolet, María Ana Pérez-Cruz, Miguel A. Montes-Moran

Adrian Bonilla-Petriciolet

The pecan nuts are widely cultivated in states of north of Mexico and the residues generated during nut processing are abundant and not reused. In the present study, the pericarp of pecan (PP) was physicochemically characterized and their use as low cost biosorbent of lead and acid blue 25 was studied in batch systems at different experimental conditions. Also, the PP was used as precursor of activated carbon and a natural modifier agent extracted from egg shells was used in the synthesis of the carbons. Results suggest that the pericarp of pecan (PP) has an acidic character due to the …

Activity Coefficients Of Adsorbed Mixtures, Orhan Talu, Jianmin Li, Alan L. Myers

Chemical & Biomedical Engineering Faculty Publications

Experimental and simulated data for adsorption of gas mixtures on energetically heterogeneous surfaces like activated carbon and zeolites exhibit negative deviations from ideality. The deviations are large in some cases, with activity coefficients at infinite dilution equal to 0.1 or less. Similar molecules form ideal mixtures, but molecules of different size or polarity are nonideal. Equations for bulk liquid mixtures (Wilson, Margules, etc.) do not apply to isobars for adsorbed mixtures. A two-constant equation for activity coefficients as a function of composition and spreading pressure is in good agreement with theory, simulation, and experiment.