2020, Issue 66(70), Fasc. 2 (June)
Contents
pages 1- 8 Download
Alternative Uses of Paper and Cardboard in Architecture and Construction
TEOFIL CÂMPEAN, "Gheorghe Asachi" Technical University
of Iași, Romania, "Cristofor Simionescu" Faculty of Chemical Engineering and
Environmental Protection; SC Rondocarton SRL, Apahida, Cluj, Romania
NICOLAE PEIU, Environmental Protection Agency, Iași,
Romania
MARIA GAVRILESCU, "Gheorghe Asachi" Technical
University of Iași, Romania, "Cristofor Simionescu" Faculty of Chemical
Engineering and Environmental Protection,
mgav@ch.tuiasi.ro
pages 9 - 29 Download
Abstract
This paper developed an analysis of the relevant uses of paper
and cardboard in construction and architecture, as a basis for information
for future studies and research. In this context, based on data from the
literature it is demonstrated that it is possible that cardboard products
with sufficient compressive strength can withstand structural loads, thus
providing an alternative to the use of traditional construction materials
(concrete and steel), in the field construction and architecture. There is
also the potential for the use of cardboard as a material in the
construction of assemblies as construction elements, such as panels for
walls, roofs and floors, as well as the development of short-lived or
temporary buildings. Some houses are made of waste paper and cardboard and
can be recycled for the manufacture of cardboard. These recycling processes
involve less energy and clearly less raw materials than the production of
many other materials.
Keywords: building materials; cardboard tubes;
environmental impact; insulation; recycling.
Reactive Arancio Kemazol 3R Dye Removal from Aqueous Solutions by Adsorption onto Sawdust
CARMEN ZAHARIA, "Gheorghe Asachi" Technical University
of Iași, Romania, "Cristofor Simionescu" Faculty of Chemical Engineering and
Environmental Protection,
czah@ch.tuiasi.ro
DANIEL FLAVIAN GRĂDINARU, "Gheorghe Asachi" Technical University of Iași, Romania,
"Cristofor Simionescu" Faculty of Chemical Engineering and Environmental
Protection
pages 31 - 42 Download
Abstract
The paper presents a few findings after some laboratory
adsorption tests onto sawdust applied to retain the reactive Arancio Kemazol
3R dye from aqueous solutions by using the ‘batchwise’ sorption technique.
For high efficiency of reactive dye removal, some operating parameters such
as initial dye solution pH (2.5-10.86), dye concentration (13-60 mg/L),
adsorbent concentration (3-80 g/L), temperature (5°C, 20°C and 40°C), and
sorption time (0.5-24 h) were studied. The best adsorption performance was
obtained at very high acidic pH (2.5-2.8), with sawdust concentration of
13-60 g/L, temperature of 5°C till 20°C, initial intermittent agitation (no
more than 3-5 min), continuous sorption operating regime, a minimum contact
time of 480 (pH=2.6), or 600 min (pH=5.40), and was varied between 54.77%
(5°C, pH=2.6 and 60 g/L adsorbent) and 44.78% (20°C, pH=2.6 and 80 g/L
adsorbent). To increase the reactive dye removal must be applied other
physical-chemical or biological treatment steps (i.e.
coagulation-flocculation, advanced oxidation/reduction, membrane processes
as ultrafiltration, ionic exchange, etc.) and obligatorily a neutralization
step.
Keywords: adsorption; operating parameters; reactive dye removal;
sawdust; treatment efficiency.
A Comparative Study of Zn(II) Ions Biosorption from Aqueous Solution on Red Marine Algae Biomass and Alginate
ALINA-ROXANA LUCACI, "Gheorghe Asachi" Technical
University of Iași, Romania, "Cristofor Simionescu" Faculty of Chemical
Engineering and Environmental Protection
LAURA BULGARIU,
"Gheorghe Asachi" Technical University of Iași, Romania, "Cristofor
Simionescu" Faculty of Chemical Engineering and Environmental Protection,
lbulg@tuiasi.ro
pages 43 - 52 Download
Abstract
The current trend of specialized research in environmental
bioremediation is focused on studies related to the biosorption of metal
ions on biological materials. Algae biomass is of great interest due to the
significant amount of waste found on our Romanian beaches, which is why
several researchers have studied its possibility of being used in
environmental remediation processes. Because, marine algae biomass has a
modest capacity to retain metal ions from aqueous solutions, the extraction
of active compounds from their composition could be a solution to increase
biosorptive performance in metal ion removal processes. Alginate is an
active compound obtained from red marine algae biomass. In this study, we
tested the biosorption performance of red algae sp. Callithamnion corymbosum
and alginate extracted from them, in retaining Zn(II) ions from aqueous
solutions.
Keywords: Alginate; red marine algae; biosorption; Zn(II)
ions; aqueous solution.
Resveratrol in the Prevention and Treatment of Oxidative Stress
DELIA TURCOV, "Gheorghe Asachi" Technical University of
Iași, Romania, "Cristofor Simionescu" Faculty of Chemical Engineering and
Environmental Protection
ANCA ZBRANCA, "Grigore T. Popa"
University of Medicine and Pharmacy of Iaşi, Romania, Faculty of Medical
Bioengineering
LUIZA IOANA HORCIU, "Gheorghe Asachi"
Technical University of Iași, Romania, "Cristofor Simionescu" Faculty of
Chemical Engineering and Environmental Protection
DANIELA ȘUTEU,
"Gheorghe Asachi" Technical University of Iași, Romania, "Cristofor
Simionescu" Faculty of Chemical Engineering and Environmental Protection,
danasuteu67@yahoo.com
pages 53 - 65 Download
Abstract
The therapeutic approach of some of the most frequent diseases
continues to bring about suggestions, studies and solutions regarding the
mechanisms involved in their control and the best ingredients for the
products in the treatment schemes. Among the bioactive ingredients, the
antioxidants are impressively frequent for numerous pathologies. First
ranking in this category are the diseases of the century: diabetes,
oncology, metabolic, neurodegenerative, as well as certain dermatological
diseases. Among these, rosacea, acne and venous ulcer have been most
challenging lately as a result of their etiological complexity and the
curing difficulties. As issues of great interest for scientific research,
antioxidant bioactive compounds are the focus of numerous studies regarding
solutions to optimise obtaining methods, successful associations and the
best presentation forms in order to be as patient compliant as possible.
Resveratrol is an acknowledged antioxidant, largely used both in internal
and external usage aimed products. The present paper intends to draw a
synthesis of the latest information about the role resveratrol plays in
relieving oxidative stress and to suggest new research directions.
Keywords: antioxidant; dermatocosmetics formulas; liquid-solid extraction;
oxidative stress; resveratrol.
New Dermatocosmetic Formulations Using Bioactive Compounds from Indigenous Natural Sources
DELIA TURCOV, "Gheorghe Asachi" Technical University of
Iași, Romania, "Cristofor Simionescu" Faculty of Chemical Engineering and
Environmental Protection
LĂCRĂMIOARA RUSU, "Vasile
Alecsandri" University of Bacău, Romania, Faculty of Engineering
ANCA ZBRANCA, "Grigore T. Popa" University of Medicine and Pharmacy
of Iaşi, Romania, Faculty of Medical Bioengineering
DANIELA
ȘUTEU, "Gheorghe Asachi" Technical University of Iași, Romania,
"Cristofor Simionescu" Faculty of Chemical Engineering and Environmental
Protection, danasuteu67@yahoo.com
pages 67 - 76 Download
Abstract
Along with the amazing development of the dermatocosmetic
industry, there has also been a surge in the research, concerning the
biologically active ingredients for these products. Significant growth has
taken place both in the presentation forms of the dermatocosmetic products
and in the production methods, which ensure the quality and performance of
the bioactive compounds. At the same time, special attention is paid to
those pathologies which affect the population more frequently. Among these,
rosacea, venous leg ulcer and acne have been some of the most challenging
diseases in recent years, due to the complexity of the etiology and
difficult healing. Among the most recent components of therapeutic formulas
of the above-mentioned diseases, scientific research has shown great
interest in bioactive compounds with antioxidant activity, which contribute
to combat the effects of free radicals. This paper aims to present several
examples of a series of new dermatocosmetic formulations using bioactive
compounds from indigenous natural sources, currently existing on the
dermatocosmetics products market and also, some new development directions
in this field.
Keywords: antioxidants; bioactive compounds;
dermatocosmetics; indigenous flora; liquid-solid extraction.