2022, Issue 68(72), Fasc. 2 (June)

Contents

pages 1- 8   Download

Evaluation of the Fat Content of Spreadable Foods

PAULA SIMIONESCU, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Iaşi, Romania, paula.simionescu@student.tuiasi.ro
ANAMARIA POROHNIUC, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Iaşi, Romania
ANIŞOARA AIONESEI, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Iaşi, Romania
VALENTIN PANAIT, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Iaşi, Romania
GABRIELA LISA, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Iaşi, Romania

pages 9 - 16   Download
Abstract
Differential scanning calorimetry was used to identify the types of fats in spreadable food. Three types of commercial margarine and three types of butter and a homemade product were analyzed. The presence of vegetable oils in two of the types of butter analyzed was identified. In one of the samples of margarine analyzed, the presence of saturated fats was highlighted, although according to the producer, it would contain only unsaturated vegetable fats. It has been shown that the DSC technique can be used to identify adulteration of butter or margarine and this method has the advantage of requiring a very small amount of samples, very good reproducibility and a short time for analysis.
Keywords: DSC, margarine, butter, adulteration of spreadable foods.

Azo-Polysiloxanes - Surface Properties Studies

CRISTINA-MARIA HERGHILIGIU, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Department of Natural and Synthetic Polymers, Iaşi, Romania, cristina-maria.herghiligiu@academic.tuiasi.ro
NICOLAE HURDUC, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Department of Natural and Synthetic Polymers, Iaşi, Romania

pages 17 - 26   Download
Abstract
Due to the latest studies on the potential applications of azopolymers in the biological field as a support for cell seeding, it is necessary to study how azo-polysiloxanic chains are reorganizing depending on the film thickness and the type of support on which polymeric film is deposited. In addition to the fact that there are not many articles that try to explain the modification of azopolymers under the influence of aqueous media, this study helps to form an overview of how the chains are reorganized at the surface of the film and its depth, studying the variation of water contact angle of azo-polysiloxanic samples deposited on different supports with variable film thicknesses. Results indicate pattern behaviour of chain arrangements function of film thickness no matter the type of support.
Keywords: contact angle, surface properties, azo-polymers, polysiloxane, azo-derivates.

Layered Double Hydroxides as Active Environmental Cleaners of Polluted

THEODOR BAHNARIU, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Iaşi, Romania
RIDOUAN BENHITI, University Ibn Zohr, Faculty of Sciences, Department of Chemistry, Laboratory of Applied Chemistry and Environment, Agadir, Morocco
MOHAMED CHIBAN, University Ibn Zohr, Faculty of Sciences, Department of Chemistry, Laboratory of Applied Chemistry and Environment, Agadir, Morocco
GABRIELA CARJA, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Iaşi, Romania, gcarja@ch.tuiasi.ro

pages 27 - 35   Download
Abstract
Environmental problems are more prevalent nowadays and one of the big concerns is water contamination by highly toxic pollutants. The employment of adsorption technologies constitutes a powerful tool for the reduction of water pollution because of the mild conditions required by adsorption and its good efficiency in pollutant removal processes. Defined by a versatile micro/nanotexture layered double hydroxides (LDH) can be fabricated to own specific nanoarchitectonics hence, they are proposed nowadays as efficient adsorbents. This work presents MgAlLDH and the derived calcined forms to be employed as efficient adsorbents to treat aqueous mediums polluted with industrial dyes (e.g.: Nylosan Navy). Results reveal a strong connection between the adsorption efficiency and the micro/nanomorphology features of the LDH. The structure and morphology properties of the LDHs were studied by XRD, FESEM and N2 adsorption techniques. These findings might pave the way to establish novel solutions to remove toxic compounds from aqueous mediums by using LDHs as efficient environmental cleaners in water technologies.
Keywords: LDH, pollutant, nano/micromorphology, adsorption.

Methods for Obtaining of New Add-Value Materials by Fly-Ash Modification

ALEXANDRU-IOAN COTOFAN, S.C. Gemite RO SRL, Iaşi, Romania
MIHAELA CAFTANACHI, S.C. Gemite RO SRL, Iaşi, Romania
MIHAI VRABIE, S.C. Gemite RO SRL, Iaşi, Romania
MARIA HARJA, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Iaşi, Romania, mharja@tuiasi.ro

pages 37 - 49   Download
Abstract
Modified fly ash materials are currently on an upward trend internationally. The recovery of waste such as ash resulting in obtaining new products has an economic advantage but also has a significant impact on the environment because of reducing pollution due to storage. At present, there are many methods to synthesize new materials from wastes, the best known being fly ash. For the synthesis of novel materials, the most well-known methods will be used. It is known that the methods are formed of a single or two stages. The direct hydrothermal conversion of a mixture of ash and alkaline solution (NaOH, KOH) is the first and most common approach, however only 50% of the ash can be transformed in this instance. The second method involves combining the ash with KOH and fusing the mixture at high temperatures. This procedure results in a sophisticated conversion. According to literature studies, the conversion of ash can be done by using microwave ovens or ultrasonic baths, the conversion time in this case being reduced to 1 - 2 hours. The direct technique was proposed to be utilized to create novel materials by synthesis based on these processes, with numerous applications in industries such as building and agriculture.
Keywords: fly ash, synthesis, direct hydrothermal conversion, alkaline solution, microwave ovens, ultrasonic baths.

Reological Behavior of Cold Cream with Concentrated Soxhlet Alcoholic Extract of Basil

CLAUDIA COBZARU, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Iaşi, Romania
COBILIȚĂ CĂTĂLINA ELENA, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Iaşi, Romania
MARICEL DANU, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Iaşi, Romania; “Petru Poni” Institute of Macromolecular Chemistry, Iaşi, Romania
CONSTANŢA IBĂNESCU, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Iaşi, Romania; “Petru Poni” Institute of Macromolecular Chemistry, Iaşi, Romania
GABRIELA ANTOANETA APOSTOLESCU, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Iaşi, Romania
RAMONA-ELENA TATARU-FARMUȘ, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Iaşi, Romania
NICOLAE APOSTOLESCU, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Iaşi, Romania
CORINA CERNĂTESCU, “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Iaşi, Romania

pages 51 - 60   Download
Abstract
This paper study the rheological behavior of a cream obtained with natural ingredients, but also one commercially available, in which concentrated alcoholic basil extract was incorporated. The extract was obtained by using the Soxhlet extraction method. The experimental results showed that the creams have a time dependent pseudo plastic rheological behavior, with pleasant appearance and fine texture and is moderately absorbed into the skin, providing hydration, softness and flexibility, as well as a characteristic basil smell.
Keywords: rheology, cold cream, Soxhlet alcoholic basil extract.

Habilitation thesis summary

Innovative wastewater treatment technologies: opportunities, perspectives and challenges

CARMEN ZAHARIA “Gheorghe Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, czah@ch.tuiasi.ro, carmen.zaharia@academic.tuiasi.ro

pages 61 - 64   Download