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Papers by Raffaele Molinari
Topics in molecular organization and engineering, 1994
The scientific and technological progresses in membrane processes during the past two decades hav... more The scientific and technological progresses in membrane processes during the past two decades have been huge. The existing and potential industrial applications of membrane operations are the widest if compared with any other available separation technology. Pressure driven membrane operations by themselves have already been successfully applied practically in all industrial sectors: from textile to pharmaceutical industry, from leather to agrofood, from automobile to water industry. Biomedical and biotechnological applications, membrane sensors, artificial organs, advanced components in analytical instruments, are other examples of well established membrane systems.
Journal of Cleaner Production, Dec 1, 2021
Membrane Technology, Nov 1, 1998
Agencja Wydawnicza “ARGI”, 2001
Current Trends and Future Developments on (Bio-) Membranes, 2018
Abstract A brief overview of photocatalytic membrane reactors (PMRs) utilizing pressure-driven me... more Abstract A brief overview of photocatalytic membrane reactors (PMRs) utilizing pressure-driven membrane techniques such as microfiltration, ultrafiltration, and nanofiltration is presented and discussed. Possible strategies of mitigation of membrane fouling in PMRs, including backwashing, air sparging, intermittent permeation, control of hydraulic conditions, etc., are explained in detail. The problem of membrane stability in PMRs in terms of their resistance to UV irradiation, action of reactive oxygen species, and abrasion by photocatalyst particles is explicated. Moreover, an overview of factors affecting the permeate quality is presented. Finally, examples of various configurations of PMRs, including pressurized PMR and submerged PMR systems with photocatalyst in a slurry or photocatalytic membranes are described and compared.
2018 IEEE 4th International Forum on Research and Technology for Society and Industry (RTSI), 2018
Journal of Membrane Science and Research, 2019
Liquid Membrane (LM) based processes, as Supported Liquid Membranes (SLMs), have been proposed, f... more Liquid Membrane (LM) based processes, as Supported Liquid Membranes (SLMs), have been proposed, for over 30 years, as effective methods for the selective separation of inorganic/organic species from different water streams. The industrial use of SLMs has been limited mainly by their insufcient stability. To investigate on the main cause of system destabilization and the optimal conditions for mass transport, a good reference system is the traditional SLM. To this aim the recovery of neodymium (Nd) from acidic media by a traditional SLM has been studied, giving particular attention to permeation and stability. The results clearly evidenced that system stability was strongly influenced by the solubilization of the carrier in the aqueous phases. The consideration and the experimental results reported in this work give useful information to shift the next research step versus the development of a 2nd generation of SwLM able to give satisfactory system performance in view of industrial appl...
Catalysts
Photocatalytic membrane reactors (PMRs) have been found to be very effective in the removal of or... more Photocatalytic membrane reactors (PMRs) have been found to be very effective in the removal of organic pollutants (particularly recalcitrant compounds) from wastewater because they allow for the mineralization of organic pollutants to innocuous by-products, thus achieving high-quality treated water. Owing to the very high volumes of water involved, treated sewage wastewater could be reused if a very efficient tertiary stage, like a PMR, can be foreseen. In this review, the two main PMR configurations (photocatalytic membranes and slurry PMRs) were analyzed as requirements of a tertiary treatment of sewage wastewater considering six design and operational parameters of such plants: (i) continuous wastewater flow rate from the secondary stage; (ii) the self-control of the photodegradation rate related to wastewater chemical–physical parameters; (iii) ability to handle variations of wastewater concentration and flow rate; (iv) the control of the quality of treated wastewater; (v) low p...
Topics in molecular organization and engineering, 1994
The scientific and technological progresses in membrane processes during the past two decades hav... more The scientific and technological progresses in membrane processes during the past two decades have been huge. The existing and potential industrial applications of membrane operations are the widest if compared with any other available separation technology. Pressure driven membrane operations by themselves have already been successfully applied practically in all industrial sectors: from textile to pharmaceutical industry, from leather to agrofood, from automobile to water industry. Biomedical and biotechnological applications, membrane sensors, artificial organs, advanced components in analytical instruments, are other examples of well established membrane systems.
Journal of Cleaner Production, Dec 1, 2021
Membrane Technology, Nov 1, 1998
Agencja Wydawnicza “ARGI”, 2001
Current Trends and Future Developments on (Bio-) Membranes, 2018
Abstract A brief overview of photocatalytic membrane reactors (PMRs) utilizing pressure-driven me... more Abstract A brief overview of photocatalytic membrane reactors (PMRs) utilizing pressure-driven membrane techniques such as microfiltration, ultrafiltration, and nanofiltration is presented and discussed. Possible strategies of mitigation of membrane fouling in PMRs, including backwashing, air sparging, intermittent permeation, control of hydraulic conditions, etc., are explained in detail. The problem of membrane stability in PMRs in terms of their resistance to UV irradiation, action of reactive oxygen species, and abrasion by photocatalyst particles is explicated. Moreover, an overview of factors affecting the permeate quality is presented. Finally, examples of various configurations of PMRs, including pressurized PMR and submerged PMR systems with photocatalyst in a slurry or photocatalytic membranes are described and compared.
2018 IEEE 4th International Forum on Research and Technology for Society and Industry (RTSI), 2018
Journal of Membrane Science and Research, 2019
Liquid Membrane (LM) based processes, as Supported Liquid Membranes (SLMs), have been proposed, f... more Liquid Membrane (LM) based processes, as Supported Liquid Membranes (SLMs), have been proposed, for over 30 years, as effective methods for the selective separation of inorganic/organic species from different water streams. The industrial use of SLMs has been limited mainly by their insufcient stability. To investigate on the main cause of system destabilization and the optimal conditions for mass transport, a good reference system is the traditional SLM. To this aim the recovery of neodymium (Nd) from acidic media by a traditional SLM has been studied, giving particular attention to permeation and stability. The results clearly evidenced that system stability was strongly influenced by the solubilization of the carrier in the aqueous phases. The consideration and the experimental results reported in this work give useful information to shift the next research step versus the development of a 2nd generation of SwLM able to give satisfactory system performance in view of industrial appl...
Catalysts
Photocatalytic membrane reactors (PMRs) have been found to be very effective in the removal of or... more Photocatalytic membrane reactors (PMRs) have been found to be very effective in the removal of organic pollutants (particularly recalcitrant compounds) from wastewater because they allow for the mineralization of organic pollutants to innocuous by-products, thus achieving high-quality treated water. Owing to the very high volumes of water involved, treated sewage wastewater could be reused if a very efficient tertiary stage, like a PMR, can be foreseen. In this review, the two main PMR configurations (photocatalytic membranes and slurry PMRs) were analyzed as requirements of a tertiary treatment of sewage wastewater considering six design and operational parameters of such plants: (i) continuous wastewater flow rate from the secondary stage; (ii) the self-control of the photodegradation rate related to wastewater chemical–physical parameters; (iii) ability to handle variations of wastewater concentration and flow rate; (iv) the control of the quality of treated wastewater; (v) low p...