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Ultralong hydroxyapatite-based forward osmosis membrane for freshwater generation

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Frontiers of Chemical Science and Engineering 2024年第9期18卷 37-49页

作者： Mohamed Gamal Gomaa Hamdy Maamoun Abdel-Ghafar Francesco Galiano Francesca Russo Alberto Figoli El-Sayed Ali Abdel-Aal Abdel-Hakim taha Kandil Bahaa Ahmed salah Central Metallurgical Research and Development Institute(CMRDI) 11421 CairoEgypt Chemistry Department Faculty of ScienceHelwan University11795 CairoEgypt Institute on Membrane Technology(CNR-ITM) 87036 RendeItaly

Increasing global water shortages are accelerating the pace of membrane manufacturing,which generates many environmentally harmful *** challenges need a radical rethink of developing innovative membranes that can address freshwater production without generating environmentally harmful *** work utilized the synthesized ultra-long hydroxyapatite(UHA)by the solvothermal method using the green solvent oleic acid in preparing UHA-based forward osmosis *** membranes were developed using different loading ratios of graphene oxide(GO)by vacuum-assisted filtration *** prepared GO/UHA membranes were identified using X-ray diffraction,scanning electron microscope,Fourier-transform infrared spectroscopy,and X-ray photoelectron *** contact angle and pore size distribution were determined for the obtained GO/UHA *** obtained hierarchical porous structure in the prepared membranes with interconnected channels results in a stable water flux with reverse salt *** best water flux rate of 42±2 L·m^(–2)·h^(–1)was achieved using the 50 mg GO/UHA membrane,which is 3.3 times higher than the pristine membrane,and a reverse salt flux of 67 g·m^(-2)·h^(–1).The obtained results showed a promising capability of a new generation of sustainable inorganic-based membranes that can be utilized in freshwater generation by energy-efficient techniques such as forward osmosis.

关键词： forward osmosis ultra-long hydroxyapatite graphene oxide inorganic-based membrane

Enhancing sustainability in phosphate ore processing:Performance of frying oil as alternative flotation collector for carbonate removal

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International Journal of Mining Science and Technology 2024年第4期34卷 557-571页

作者： Asmae El-bahi Yassine taha Yassine Ait-Khouia Abdellatif Elghali Mostafa benzaazoua Geology&Sustainable Mining Institute(GSMI) Mohammed VI Polytechnic UniversityBen Guerir 43150Morocco

Recycling waste frying oils for the synthesis of flotation reagents presents a promising avenue for sustainable waste ***,it offers a cost-effective solution for crafting a specialized collector designed to efficiently remove carbonates and enhance phosphate enrichment in froth flotation *** study focuses on the synthesis of an anionic collector using the saponification reaction of a frying oil sample,subsequently applied to the flotation of calcite and *** elucidate the adsorption mechanisms of the frying oil collector(FrOC)and sodium oleate,a reference collector,on fluorapatite,calcite,dolomite,and quartz surfaces,comprehensive experiments were conducted,including zeta potential measurements and Fourier transform infrared *** revealed diverse adsorption affinities of the molecules towards these *** assess the practical performance of the collector,flotation tests were conducted using a natural phosphate ore mixture,employing a BoxBehnken experimental ***,under optimized conditions(pH 9,1000 g/t of FrOC,3.5 min of conditioning,and 6 min of flotation),FrOC exhibited excellent performance,with calcite and dolomite recoveries exceeding 80%,while apatite recovery in the concentrate fraction remained below 10%.This work exemplifies both circular economy practices and the distinctive approach to sustainable mineral processing.

关键词： Frying oils recycling Phosphate beneficiation Flotation separation Green surfactants Sustainability

A New Non-centrosymmetric Microporous Fluorinated Iron Phosphate： Structural Elucidation, Spectroscopic Study and Hirshfeld Surface Analysis

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Chemical Research in Chinese Universities 2016年第4期32卷 519-526页

作者： Nabaa BOUZIDIA Besma HAMDI Abdelhamid ben salah Laboratory of Materials Science and Environment Faculty of Sciences of Sfax University of Sfax PB 1171 3000 SFAX Tunisia

The crystal structure of a new non-centrosymmetric microporous fluorinated iron phosphate, （H30）2[Fe4（H2O）2F4（PO4）2（HPO4）2]（H2O）, was determined by single crystal X-ray diffraction analysis and the result reveals that it belongs to the orthorhombic system with four molecules in the unit cell（space group P212121）. Thus, the complex was characterized by powder X-ray diffraction, spectroscopic techniques（Fourier transform infrared and Fourier transform Raman） and 19F MAS NMR. The elemental analysis of the sample was also carried out. The chiral inorganic sheets, which stacked along [100] showed the presence of FeF2O4 as well as FeF2O3H2O octahedra, PO4 besides HPO4 tetrahedra, hydronium ions（H3O＋） and isolated water molecules. Hirshfeld surface analysis, especially dnom surface and fingerprint plots, were used for decoding the intermolecular interactions in the crystal network and the contribution of component units for the construction of the 3D architecture. From the Hirshfeld surfaces and 2D fingerprint analysis, it was found that the subtle interactions, such as H...H associating the third intense interaction of all intercontacts, provide extra stabilization in addition to the presence of the strong hydrogen bonds mentioned above.

关键词： Non-centrosymmetric structure Iron fluorinated phosphate Hirshfeld surface analysis

Study on the Remediation of Nitrogen Contaminated Groundwater by the Biological Immobilization Permeable Reactive Barrier

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Study on the Remediation of Nitrogen Contaminated Groundwate...

作者： MOHOMED salah MOHOMED taha 兰州理工大学

学位级别：硕士

地下水是经济和社会发展所必需的、不可替代的重要资源。然而,地下水硝酸盐污染已成为普遍关注的环境地质问题。针对地下水中氮污染来源多样、污染行为复杂、污染面积广泛且治理成本高等特点,本文研究采用渗透式反应墙(Permeable reacti... 详细信息

地下水是经济和社会发展所必需的、不可替代的重要资源。然而,地下水硝酸盐污染已成为普遍关注的环境地质问题。针对地下水中氮污染来源多样、污染行为复杂、污染面积广泛且治理成本高等特点,本文研究采用渗透式反应墙(Permeable reaction Barrier,PRB)地下水原位修复技术,设计了一种由氧捕获层和固定化生物降解层组成的原位双层系统,以达到地下水氮污染的一次性彻底无害化治理的目的。第一层采用含氧试剂—零价铁(Zero Valent Iron,ZVI)、柠檬酸钠以及其他无机盐等,用于快速地消耗地下水中的溶解氧(DO),以便为反硝化创造厌氧条件。第二层以颗粒活性炭为微生物载体,以保证能够生物降解硝酸盐进入PRB,并提供足够的碳和磷等营养物质,用于固定化反硝化细菌的正常代谢。由于采用的固定化细菌局部细菌浓度较高,可获得更高的去除率。本文首先确定了DO对生物降解的影响,考察了ZVI捕获氧气的有效性和制备的氧捕获材料的特性。研究表明,在DO=0.02 mg/L,氮的生物降解效率最大,有效去除率约为85.31%。添加500 mg/L零价铁后,DO值显著下降(从6 mg/L下降到1.61 mg/L)。其次,在探讨在反应器中添加制备的材料对细菌脱氮行为的实验研究结果表明,其生长效果优于添加矿物培养基的对照组。综上,把本研究中制备的捕获氧气材料可为反硝化细菌和微生物代谢提供厌氧条件。为了评估该PRB修复技术的可行性,研究采用两个连续向上流动不锈钢柱进行了实验室规模的柱试验。柱实验结果表明,氮的去除率可超94%,而其代谢中间体亚硝酸盐也可在该被动系统中进一步降解。

关键词：地下水可渗透反应屏障固定化微生物

Food Value of Soft Dates Cultivated in Tunisian Coastal Oases

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Journal of Life Sciences 2015年第5期9卷 234-241页

作者： Mohamed ben salah Laboratory of Aridology and Oases Crops Arid Land lnstitute Naha16051 Tunisia

Coastal date palm cultivars are interesting through their soft dates, their abundant and earliest production than continental cultivars. Maintaining bio-diversity in Tunisian oases has become a subject of first interest in date palm cultivation in Tunisia. Coastal oases still retain a very rich and varied plant biodiversity in comparison with the continental oases, weakened by the mono cultivation of ＂Deglet Nour＂ cultivar. Study of soft date＇s composition can make there well known to date consumers, help to valorize there and to help of sustainability of coastal oases ecosystem. Fresh dates from 15 cultivars was collected, dried by 80 ~C in 20-24 h. Acidity was determinate by pH meter. Sugars were appreciated by enzymatic method. Ash and minerals was calculated by photometer and spectrometer. Chemical date composition study showed that coastal date palm cultivars are predominantly rich of carbohydrates, have a low quantity of sucrose which gives them an important dietary value. Their pH varies from 5 to 6, classifies them as the best date quality for fresh consumption. Their richness in Total Nitrogen Matters and total minerals makes them at almost the same level as the other date palm eultivars analyzed by different authors in different areas of date palm production. Mineral composition showed that these dates are K and P-rich and relatively poor in Na and Ca.

关键词： Dates coastal oases Tunisia chemical composition sugars Total Nitrogen minerals.

Nitrate-induced Biochemical and Histopathological Changes in the Liver of Rats:Ameliorative Effect of Hyparrhenia hirta

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Biomedical and Environmental Sciences 2014年第9期27卷 695-706页

作者： Hanen BOUAZIZ-KETATA Ghada ben salah Hichem ben salah Rim MARREKCHI Kamel JAMOUSSI Tahia BOUDAWARA Faiza FAKHFEKH Najiba ZEGHAL Animal Physiology Laboratory UR/11 ES70Sfax Faculty of SciencesUniversity of SfaxBP1171Sfax 3000Tunisia Laboratory of Human Molecular Genetics Faculty of MedicineSfax 3029Tunisia Laboratory of Chemistry Sfax Faculty of SciencesUniversity of SfaxBP1171Sfax 3000Tunisia Laboratory of Biochemistry CHU Hedi ChakerSfax 3029Tunisia Histopathology Laboratory University of SfaxCHU Habib BourguibaSfax 3029Tunisia

Objective The present study investigated the protective role of Hyparrhenia hirta （H. hirta） against sodium nitrate （NaNO3）-induced hepatoxicity. Methods Male Wistar rats were randomly divided into three groups： a control group and two treated groups during 50 d with NaNO3 administered either alone in drinking water or co-administered with H. hit＇to. Results NaNO3 treatment induced a significant increase in serum levels of glucose, total cholesterol and triglyceride while serum total protein level decreased significantly. Transaminases and lactate deshydrogenase activities in serum were elevated indicating hepatic cells＇ damage after treatment with NaNO3. The hyperbilirubinemia and the increased serum gamma glutamyl transferase activities suggested the presence of cholestasis in NaNO3 exposed rats. In parallel, a significant increase in malondialdehyde level along with a concomitant decrease in total glutathione content and superoxide dismutase, catalase and glutathione peroxidase activities were observed in the liver after NaNO3 treatment. Furthermore, nitrate caused a significant induction of DNA fragmentation. These modifications in NaNO3-treated rats corresponded histologically with hepatoceltular necrosis and mononuclear cells infiltration. H. hirta supplementation showed a remarkable amelioration of the abnormalities cited above. Conclusion The results concluded that the treatment with H. hirta had a significant role in protecting the animals from nitrate-induced liver dysfunction.

关键词： Antioxidant Hyparrhenia hirta Liver Nitrate toxicity Oxidative stress Rat

Architecter Study of the Young Date Palm （Phoenix dactylifera L.） Root System

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Journal of Life Sciences 2014年第5期8卷 425-432页

作者： JRAD Amira ben salah Mohamed Department of Biology Faculty of Sciences of Tunis University Campus Tunis ElManar 2092 Tunis Experimental Station of Arid Lands Institute of Gabe Gabes Nahal 6051 Tunis

The architectural analysis of the young date palm （Phoenix dactylifera L.） root system （its form and its structure）, is necessary to describe its principal functions of absorption and anchoring. In this study the authors present an analysis of the root branching process. It allows them to understand the distribution of inter-lateral root length on the radicle and to account the development of the root system in the soil. Root architecture was studied from samples sprouted naturally in the oases of Chott el Ferikh （Gabes） and other plants grown in polyethylene bags under the shadow. This analysis has showed five categories of roots belonging to four different topological orders in the youthful phasis.

关键词： Architecture Phoenix dactylifera L. root system root branching.

Modeling of Date Palm （Phoenix dactylifera L.） Vegetative Aerial Architecture, Example of Two Tunisian Cultivars

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Journal of Life Sciences 2014年第5期8卷 418-424页

作者： Sana Gammoudi René Lecoustre Mohamed ben salah Arid and Oases Cropping Laboratory Arid Lands Institute Medenine 4119 Tunisia UMR AMAP CIRAD-BIOS Boulevard de la Lironde TA AS1/PS2 - 34398 Montpellier Cedex 5 France

The present study was carried out to verify the statistical relationships between the characteristic parameters in terms of vegetative aerial architecture of the date palms for simulating realistic 3D models. The vegetal material was composed of two Tunisian varieties of Phoenix dactylifera L., ＂Barhi＂ and ＂Rochdi＂. The observations are taken place in Gabes and on one pair of palms per main stem and offshoot for each cultivar. The analysis of the characteristic dimensions of the pinnae and rachis allowed the determination of a minimum sample. The geometrical analysis confirmed the existence of a strong correlation between rotation angles and radial angles. The architectural analysis of the two Tunisian cultivars revealed that the distribution of characteristic parameter values of pinnae was the outcome ofa regionalized variable along the rachis. This statistical study of relationships between the characteristic parameters in terms of vegetative aerial architecture of the two varieties allows executing a new measurement protocol for computing and simulating realistic 3D models.

关键词： Phoenix dactylifera L. modeling architecture minimum sample correlation.

Assessment of the Energy Conversion on the Thermal Balance and Atmospheric Emissions in Ceramic Tile Product Industry in Tunisia: A Case Study

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Atmospheric and Climate Sciences 2020年第4期10卷 421-442页

作者： Imed ben salah Moufida ben M’barek Jemaï Aycer ben Saad Safa Mezza Department of Geology University of Sciences of Bizerte University of Carthage Tunis Tunisia

This work aims to assess the effect of energy conversion (Thermal oil, Natural gas and cogeneration system) on atmospheric emission and energy consumption in ceramic tile product sector in Tunisia. Two tile manufactures were selected. The first plant has two production lines: The first line (FF1) operates with thermal oil with a lower calorific value (LHV) of 9811 cal/g and the second line (FG1) operating with natural gas has a lower calorific value (HHV) of 10,520 cal/g, ensuring a daily output of 300 tons each one. The second manufacture (SC2) operates with natural gas with the same LHV value. The thermal oil energy balance showed a specific consumption of 0.0481 toe/ton tile product for the FF1 manufacture line, 0.0198 toe/ton of tile product for the FG1 manufacture line and 0.0143 toe/ton of tile product for the SC2 manufactory. The electrical energy consumption was 0.0121 toe/ton of tile product for the FF1 line, 0.0108 toe/ton of tile product for the FG1 line and a production of energy (exergy) of 0.014 toe/ton for the SC2 production line. The specific consumption was split into 40% for dryer and 60% for tunnel kilns. The conversion allow to record a dryer reduction rate of 80% for nitrogen oxides (NOx), 56% for sulfur oxides (SOx), 56% for fluorinated compounds, 52% for chlorinated compounds and 52% for volatile organic compound. Whereas, the kiln reduction rate was 36% for nitrogen oxides, 51% for sulfur oxides, 36% for chlorinated compounds and 55% for fluorinated and 50% for volatile organic compounds (VCOs). Compared to natural gas line, the use of cogeneration system in kiln process shows a decrease of 67% for NOx emissions, 80% for SOx emissions, 89% for fluorinated compounds, 58% for chlorinated emissions and 64% for volatiles organic compounds. Compared to thermal oil, the use of cogeneration system reduces the thermal energy consumption by 70% and allowed to save 30% of electric energy by generate 20% of needed electric energy. The specific atmospher

关键词： Ceramic Energy Conversion Cogeneration Energy Balance Atmospheric Emissions