Treatment of dairy wastewater by electrocoagulation process: Advantages of combined iron/aluminum electrodes

Publication Scientifique

B. CHEZEAU,L. BOUDRICHE ,C. VIAL ,A. BOUDJEMAA

Received 23 Feb 2019, Accepted 28 Jun 2019, Published online: 15 Jul 2019


JournalSeparation Science and Technology Volume 55, 2020 – Issue 14

ABSTRACT:

The objective was to assess the efficiency of electrode material in an electrocoagulation (EC) process for wastewater treatment by comparing the efficiency of aluminum (Al–Al), iron (Fe–Fe) and combined Fe–Al electrodes. The treatment of synthetic dairy wastewater, characterized by high levels of 5-day biological oxygen demand (BOD5) and chemical oxygen demand (COD), was used to compare electrode materials. Experimental results showed that all electrodes materials achieved the same final removal yield in the range of current studied (55% COD, 60% total organic carbon, 90% total nitrogen, and nearly 100% turbidity) when equilibrium was achieved. But at fixed current density and initial concentration of dairy waste, the Al–Al assembly exhibited the fastest elimination, whereas the slowest removal rate was observed with the Fe–Fe electrodes, even though adsorption was always the main removal mechanism. Finally, an Fe–Al system using an Fe anode with an Al cathode emerged as a techno-economic trade-off because of the low price of iron: both metals contributed to the removal of dairy waste, and the treatment time to achieve equilibrium values was closer to the Al–Al assembly at fixed current density. Moreover, experimental results proved the additivity of the mechanisms reported for Al–Al and Fe–Fe systems with Fe–Al.

KEYWORDS: ElectrocoagulationCOD removalDairy effluentElectrode materialWastewater treatment

https://www.tandfonline.com/doi/full/10.1080/01496395.2019.1638935

Effect of cultivar and year of harvest on the mineral composition of Algerian extra-virgin olive oils

Publication Scientifique

K. BENAMIROUCHE-HARBIS. KECIRIZ.  SEBAIH. BENAMIROUCHEL. BOUDRICHE

March 2020Spanish Journal of Agricultural Research

Abstract :

Aim of study: To evaluate the effect of cultivar and year of harvest on the content of mineral elements of Algerian extra virgin olive oils. Area of study: Technical Institute of Arboriculture of Fruits and Vine (TIAFV), Bejaia, Algeria. Material and methods: The mineral contents of extra virgin olive oils from ten cultivars during two consecutive campaigns 2014/2015 and 2015/2016 were determined using atomic absorption spectrometry and absorption in a graphite furnace after microwave-assisted acid digestion. Principal component analysis was applied to correlate the mineral content with cultivar type and year of harvest. Main results: Mean concentrations for Fe, Zn, Cu, Na, K, Mg, As and Co in samples were observed in the range of 1.640-13.213, 1.546-32.866, 1.375-3.337, 19.666-104.720, 4.573-117.133, 0.120-2.560, 0.006-0.146 and 0.002-0.051 μg g-1, respectively. The first three principal components retained 76.25% of the variance. The determinants of the effect of cultivar type and year of harvest were Fe and Na; Mg, Co and As, respectively. Research highlights: The study showed that mineral composition of the olive oils was mainly determined by the cultivar and the year of harvest

https://www.researchgate.net/publication/339749278_Effect_of_cultivar_and_year_of_harvest_on_the_mineral_composition_of_Algerian_extra-virgin_olive_oils

Temporal variation of PM10, PM2.5 and gaseous pollutants (NOx, SO2) particles suspended in the atmosphere of an urban sit in Bou-Ismail.

Publication Scientifique

A. Lemou, L. Rabhi, N. Cherifi, R. Ladji, N. Yassaa

Journal of Environmental Science and Technology

Abstract

Abstract:

 In this work, we studied the daily variations of concentration of PM10, PM2.5 and gaseous pollutants at Bou-Ismail industrial area. An Airpointer carried out the different measurements during the month of February. This study revealed that PM10 and PM2.5 concentrations ranged from 1.65 μg/m3 to 38.66 μg/m3 and from 0.75μg/m3 to 12.77 μg/m3 respectively. The highest concentrations were recorded on 23 February with 38.66 μg/m3 in PM10 and 12.77 μg/m3 in PM2.5. This concentration is certainly related to the high road traffic density. It is important to note that PM10 and PM2.5 concentrations did not exceed the WHO limit (50 μg/m3) and the Algerian regulation (80 μg/m3). Variations in the mean hourly concentrations of NO and NO2 show stability during the midnight period until 7:00 AM with low concentrations. On the other hand, we notice during the day (from 8:00 AM until 6:00 PM) high concentrations of NO and NO2.  Variations in the mean hourly concentrations of SO2 show two important peaks during the morning (0.27-0.32 ppb) and the evening peak hours (0.1-0.11 ppb).

https://www.aljest.org/index.php/aljest/article/view/345

تدشين الارضية التقنية في التحاليل الفيزيائية والكيميائية بجامعة ورقلة

تدشين الارضية التقنية في التحاليل الفيزيائية والكيميائية بجامعة ورقلة

À LA UNE, Gallerie Photos

في إطار زيارة وزير التعليم العالي والبحث العلمي لجامعة ورقلة قام السيد وزير التعليم العالي والبحث العلمي البروفيسور عبد الباقي بن زيان بتدشين الارضية التقنية في التحاليل الفيزيائية والكيميائية التابعة لمركز البحث العلمي والتقني في التحاليل الفيزيائية والكيميائية ببواسماعيل والمتواجدة بجامعة ورقلة.
إن هذا الصرح العلمي ماهو إلا ثمار إستراتيجية المديرية العامة للبحث العلمي والتطوير التكنولوجي في دعم وخلق أقطاب جهوية للمصالح المشتركة في جميع انحاء الوطن إن شاء الله ستعود بالفائدة على البحث العلمي والرفع من التكوين البيذاغوجي مع مرافقة القطاع الاقتصادي والإجتماعي بولاية ورقلة

Bioactive Compounds from the Flower Part of Polygonum maritimum L. Collected from Algerian Coast

Publication Scientifique

Author(s): Imad Abdelhamid El Haci*Wissame MazariFawzia Atik-BekkaraFatma Mouttas-BendimeradFayçal Hassani

Abstract:

Background: Polygonum maritimum is one of the spontaneous halophyte plants of the Algerian coast. Many studies were carried out to evaluate the contents and the quality of phenolic compounds of this plant around the Mediterranean region. Objective: This paper intends to identify, for the first time, the phenolic compounds from the flower part of P. maritimum.

Methods: RP-HPLC-PDA (Reversed Phase-High Performance Liquid Chromatography-Photo Diode Array) material was used for this purpose. Many standards were used and their retention times were stored in a local database. Identification was made on the basis of retention times of retained compounds and those found in the literature, and UV spectra of each peak.

Results: This study intends to identify five phenolic acids (gallic, ferulic, sinapic, caffeic and syringic acids), one flavonol (rutin) and one flavanone (naringenin).

Conclusion: P. maritimum is an important source of natural bioactive compounds that can be exploited for the benefit of many fields.

Keywords: Acid phenols, flavonoids, RP-HPLC-PDA, Polygonum maritimum, halophyte, medicinal plants.

https://www.eurekaselect.com/167441/article

2D Carbon Materials as Photocatalysts

Publication Scientifique

Amel Boudjemaa

First published: 08 May 2020

Summary

This chapter describes the carbon based materials, their potential applications through photo‐catalytic process using visible light irradiation. The reaction mechanisms were also proposed. Carbon‐based materials can be applied for the various fields in the environment‐ such as pollutant degradation, heavy metal elimination, hydrogen (H2) generation, and CO2 reduction. Regarding the 2D carbon materials, most large‐scale photo‐catalytic applications mentioned in the bibliography is based on the use of carbon‐based materials. However, many efforts have been consecrated for the utilization of carbon materials as electron donors coupling or modified with transition metals or others materials used as hetero‐systems to improve their reactivity under visible light irradiation. The present chapter supplied an overview on the 2D carbon nanostructured materials to improve their catalytic performance as photo‐catalyst for different applications.

https://onlinelibrary.wiley.com/doi/abs/10.1002/9781119655190.ch4

Structural characterization, antioxidant, and antibiofilm activities of Coffea canephora green seeds

Publication Scientifique

M. AISSAOUI, M. RAHMOUN, H. LATRACHE, S. BAREK, A. ELASSRI, C. BENSOUICI, A-I. EL HACI, N. CHOUKCHOU-BRAHAM,

Published online: 03 Aug 2020

Journal of Complementary and Integrative Medicine | Ahead of Print

Abstract

Objectives

In order to explore Coffea canephora green seeds as natural extract for application in the functional-food industry, we focused this study to the evaluation of the antioxidant and the antiadhesion effect of C. canephora green seeds extracts.

Methods

The analysis of C. canephora green seeds extracts was carried out by RP-HPLC-PDA. These extracts were screened for antioxidant activities by ABTS and phenanthroline assays. The antibacterial activity was determined by microdilution method against three reference bacteria. The inhibition of bacterial adhesion at 1/8 MIC was carried out against three reference bacteria.

Results

The RP-HPLC-PDA revealed the presence of gallic acid, vanillin, quercetin, chlorogenic acid, and P-coumaric acid. The n-buatnol extract have the highest activity ABTS assays (3.96 ± 0.08 μg/mL). For this extract, the A0.5 was 1.90 ± 0.05 μg/mL for phenanthroline assay. The n-butanol extract and the methanolic extract have the higher antibacterial activity against Staphylococcus aureus ATCC 25923 (40 µg/mL).At MIC/8, the extracts of C. canephora showed 70% higher antidhesive activity against S. aureus ATCC 25923.

Conclusions

Our finding provides an effective and specific new approach to the search of antioxidant and antiadhesive compounds for different uses.

Keywords: antioxidant activityantibacterial activityadhesionCoffea canephora green seedsRP-HPLC-PDA

https://www.degruyter.com/view/journals/jcim/ahead-of-print/article-10.1515-jcim-2020-0046/article-10.1515-jcim-2020-0046.xml

Determination of trace elements Fe, cu and Zn in the Algerian cancerous plasma using X‐ray fluorescence (XRF)

Publication Scientifique

L. LahmarM.E.A. BenamarM.A. MelziC.H. MelkaouY. Mabdoua

First published: 14 November 2019

Abstract

Cancers are among the leading causes of morbidity and mortality in the world. The purpose of this study was to conduct a survey on the effect of minerals on cancer risk in the Algerian population. One hundred and seventy‐eight plasma samples were used to analyze the concentrations of iron (Fe), copper (Cu), and zinc (Zn) in cancerous patients and also in healthy subjects using the X‐ray florescence technique (XRF). Samples were classified according to the age and gender of the donors. An empirical formula was developed for the concentration of Zinc, Copper and Iron in cancer patients according to the age. The averages iron, copper and zinc concentrations in mg/kg for control and Cancer disease groups were (1493 ± 105; 1496 ± 86), (1172 ± 229; 1078 ± 283) and (1266 ± 202; 1344 ± 208) respectively. The ANOVA One‐Way test was applied. For both genders of control and cancer disease groups it shows a significant decrease rate of copper for global and female gender and a significant increase rate of zinc for global and male gender (p < 0.05). The results indicate that the Cu and Zn concentration could show helpful tools for diagnosis and preventive treatment of cancer diseases.

https://onlinelibrary.wiley.com/doi/full/10.1002/xrs.3126

Chemical Characterization of Marine Aerosols in a South Mediterranean Coastal Area Located in Bou Ismaïl, Algeria

Publication Scientifique

Sidali Khedidji1,2, Konrad Müller3, Lyes Rabhi2,4, Gerald Spindler3, Khanneh Wadinga Fomba3, Dominik van Pinxteren3, Noureddine Yassaa  2,5,6, Hartmut Herrmann  3

Departments of Chemistry, University of Akli Mohand Oulhadj, Bouira 10000, Algeria
Faculty of Chemistry, University of Sciences and Technology Houari Boumediene (USTHB), BP 32 El-Alia Bab-Ezzouar, 16111 Algiers, Algeria
Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
Unité de Recherche en Analyses et Développement Technologiques en Environnement-Centre de Recherche Scientifique et Technique en Analyses Physico-chimiques UR-ADTE- CRAPC, BP 384, Zone industrielle RP, 42004 Bou Ismail, Tipaza, Algérie
Centre de Développement des Energies Renouvelables (CDER), BP 62, Route de l’Observatoire, Bouzaréah, Algiers, Algeria
Commissariat aux Energies Renouvelables et à l’Efficacité Energétique, CEREFE, 12 Rue Docteur Saâdane, Algiers, Algeria

Received: December 24, 2019
Revised: July 3, 2020
Accepted: July 26, 2020

ABSTRACT


Daily concentrations of inorganic and organic compounds associated with PM10, i.e., atmospheric particulate matter with aerodynamic diameter of less than 10 µm, was determined at the south Mediterranean coastal area located in Bou Ismaïl, 40 km west of the Algiers city area in Algeria. From September 2011 to January 2012, chemical characterization of aerosol particles comprising water-soluble ions (WSI), trace metals, carbonaceous aerosols, the anhydrosugars levoglucosan and arabitol, dicarboxylic acids, and semi-volatile organic compounds (SVOC), i.e., alkanes, PAHs, and hopanes, was carried out by using a variety of analytical techniques. Overall, the concentrations of selected ionic species were similar to those reported at other Mediterranean sites, ranging from 3.62 µg m–3 to 5.20 µg m–3 for the monthly total WSI. Sulfate was the most abundant ion. The total concentrations of semi-volatile organic compounds (SVOC) recorded in Bou Ismaïl ranged from 7.06 to 58.8 ng m–3 for n-alkanes, from 2.44 to 35.3 ng m–3 for polycyclic aromatic hydrocarbons (PAHs), from 0.14 to 1 ng m–3 for hopanes, and from 0.67 to 13.2 ng m–3 for n-alkan-2-one. In order to reconcile species concentrations and their emission sources, sampling days were grouped into two categories according to air mass origin. In the first group, the aerosol particles were mainly of a marine origin, while those of the second group originated in the dust sector. A source analysis of total contents organic compounds (PAHs, alkanes, hopanes, and alkanones) and individual inorganic compounds by spearman rank correlation illustrated that the principal sources consisted of sea salt, secondary aerosol, and biomass burning. Additionally, PM10 constituent diagnostic ratios and the carbon preference index (CPI) for n-alkanes indicated the importance of anthropogenic emissions.


Keywords: PM10; Ions; SVOC; PAHs; Anthropogenic sources

https://aaqr.org/articles/aaqr-19-09-oa-0458

Antimalarial-agent artemisinin and derivatives portray more potent binding to Lys353 and Lys31-binding hotspots of SARS-CoV-2 spike protein than hydroxychloroquine: potential repurposing of artenimol for COVID-19

Publication Scientifique

–  M. SEHAILIA ,S. CHEMAT 

Research Centre in Physical and Chemical Analysis (C.R.A.P.C), Tipaza, Algeria 

Received 21 Apr 2020, Accepted 06 Jul 2020, Published online: 22 Jul 2020
JournalJournal of Biomolecular Structure and Dynamics

Abstract

Medicinal herbs have proved along history to be a source of multiple cures. In this paper, we demonstrate how hydroxychloroquine can act as a good inhibitor of SARS-CoV-2 Spike protein receptor-binding-domain using molecular docking studies. We also unveil how hydroxychloroquine can interfere in the prevention of Lys353 in hACE2 from interacting with the corresponding binding hotspot present on the Spike protein. Further screening of artemisinin & derived compounds produced better Vina docking score than hydroxychloroquine (-7.1 kcal mol−1 for artelinic acid vs. −5.5 kcal mol−1 for hydroxychloroquine). Artesunate, artemisinin and artenimol, showed two mode of interactions with Lys353 and Lys31 binding hotspots of the Spike protein. Molecular dynamics analysis confirmed that the formed complexes are able to interact and remain stable in the active site of their respective targets. Given that these molecules are effective antivirals with excellent safety track records in humans against various ailment, we recommend their potential repurposing for the treatment of SARS-CoV-2 patients after successful clinical studies. In addition, an extraction protocol for artemisinin from Artemisia annua L. is proposed in order to cope with the potential urgent global demand.

  • Highlights
  • Hydroxychloroquine role to prevent hACE2 from interacting with SARS-CoV-2 Spike protein is unveiled
  • Artemisinin & derivatives entangle Lys353 & Lys31 binding hotspots of virus Spike protein and prevent infection
  • Artemisinin, artesunate and artenimol stand as strong repurposing cadidates for COVID-19 clinical trials

Keywords: SARS-CoV-2COVID-19spike proteinhACE2antiviralhydroxychloroquineartemisinin

https://www.tandfonline.com/doi/full/10.1080/07391102.2020.1796809