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Ultralong hydroxyapatite-based forward osmosis membrane for freshwater generation

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 al.erto 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

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The removal of arsenic from (ground)-water by adsorbent loaded in polymeric microspheres

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Journal of Harbin Institute of Technology(New Series) 2012年第1期19卷 63-66页

作者： figoli A HOINKIS J CRISCUOLI A FRANZ C DE RYCKE M BLOCK C DEOWAN S A ISLAM R DRIOLI E Institute on Membrane Technology (ITM-CNR) Via Pietro BucciCubo 17C87030 Rende ( CS) Italya Karlshrue University of Applied Sciences Moltkestr. 30 76133KarlshrueGermany Sustainable Process Materials Engineering GROUP T-Leuven Engineering CollegeVesaliusstraat 133000 LeuvenBelgium

Arsenic is a natural tasteless and odourless element,existing in the earth's crust at average levels of between two and five thousands micrograms per liter (parts per million) . Arsenic is highly toxic to humans, who are exposed to it primarily from air,food and water. The occurrence of arsenic in groundwater is due to geological composition of soil. High concentrations of arsenic in water are the result of dissolution or desorption of ferric oxides and the oxidation of mineral arsenopyrites. Arsenic in drinking water has an important impact on the human health,especially in the less developed countries. Different methods exist to remove arsenic from aquatic media,and one of them is by adsorption. In this work,the adsorption of both As(III) and As(V) by means of novel microspheres has been investigated. In particular,TiO2 has been embedded into polymeric microspheres PES (PolyEtherSulphone) and PEEK-WC (PolyEtherEther-Ketone) . The main advantages of this encapsulation adsorption material are: no loss of adsorbents into the water stream,easy to be used and scaled-up.

关键词： arsenic removal adsorption TiO2 polymeric microspheres

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用DSP控制器整合马达控制和功率因数校正

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电子产品世界 2001年第17期8卷 15-18页

作者： David figoli Zhenyu Yu 彭京湘 TI公司Mohammed S Arefeen

随着数字信号处理器(DSP)价格从几百美元降到3美元,DSP在价格敏感的家电(如洗衣机、冰箱、加热器、通风和空调机)中正越来越多地被采用.带特殊外设的高MIPs DSP,除显著地改进这些产品性能外,还大大地简化产品设计过程并提供各种重要的... 详细信息

随着数字信号处理器(DSP)价格从几百美元降到3美元,DSP在价格敏感的家电(如洗衣机、冰箱、加热器、通风和空调机)中正越来越多地被采用.带特殊外设的高MIPs DSP,除显著地改进这些产品性能外,还大大地简化产品设计过程并提供各种重要的特异性能.DSP非凡的处理能力,使得制造商能满足用户不断增加的要求,如较高的效率和可变速度工作及精确的速度控制特性.

关键词：功率因数校正 DSP控制器马达控制占空率基准电压基本向量串行通信马达驱动脉宽调制升压拓扑

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