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Non-toxic, high selectivity process for the extraction of precious metals from waste printed circuit boards

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Frontiers of Environmental Science & Engineering 2023年第10期17卷 65-74页

作者： Giulia Merli Alessandro Becci alessia Amato Francesca Beolchini Department of Life and Environmental Sciences Polytechnic University of MarcheAncona 60131Italy

The work presented here focused on the extraction of gold (Au), silver (Ag) and palladium (Pd) from electronic waste using a solution of ammonium thiosulfate. Thiosulfate was used as a valid alternative to cyanide for precious metal extractions, due to its non-toxicity and high selectivity. The interactions between sodium thiosulfate, total ammonia/ammonium, precious metal concentrations and the particle size of the waste printed circuit boards (WPCBs) were studied by the response surface methodology (RSM) and the principal component analysis (PCA) to maximize precious metal mobilization. Au extraction reached a high efficiency with a granulometry of less than 0.25 mm, but the consumption of reagents was high. On the other hand, Ag extraction depended neither on thiosulfate/ammonia concentration nor granulometry of WPCBs and it showed efficiency of 90% also with the biggest particle size (0.50 < Ø < 1.00 mm). Pd extraction, similarly to Au, showed the best efficiency with the smallest and the medium WPCB sizes, but required less reagents compared to Au. The results showed that precious metal leaching is a complex process (mainly for Au, which requires more severe conditions in order to achieve high extraction efficiencies) correlated with reagent concentrations, precious metal concentrations and WPCB particle sizes. These results have great potentiality, suggesting the possibility of a more selective recovery of precious metals based on the different granulometry of the WPCBs. Furthermore, the high extraction efficiencies obtained for all the metals bode well in the perspective of large-scale applications.

关键词： Thiosulfate Printed circuit boards Precious metals Leaching Hydrometallurgy

Characterizing traditional rice varieties grown in temperate regions of Italy:free and bound phenolic and lipid compounds and in vitro antioxidant properties

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Food Quality and Safety 2018年第2期2卷 89-95页

作者： Pierluigi Plastina Bartolo Gabriele alessia Fazio Department of Pharmacy Health and Nutritional SciencesUniversity of CalabriaArcavacata di Rende(CS)Italy Department of Chemistry and Chemical Technologies University of CalabriaArcavacata di Rende(CS)Italy

Objectives:A comparative study regarding the fatty acid profiles and antioxidant properties of the two most common varieties of rice(Carnaroli and Karnak)cultivated in Sybaris(Southern Italy)was *** variety from Pavia district(Northern Italy)was also ***:Free and bound lipids were separately *** acid composition was determined by high resolution gas chromatography(HRGC).Free and bound phenolic acids were determined using high performance liquid chromatography(HPLC).The antioxidant properties were assessed using 2,2’-diphenyl-1-picrylhydrazyl(DPPH)radical scavenging ***:The total lipid content was found to be higher in both Sybaris species with respect to the Pavia *** lipid distribution was also significantly *** particular,the amount of bound lipids(14.2-16.3 mg g−1)was higher than the free lipids(7.2-7.5 mg g−1),and unsaturated fatty acids(USFA)were significantly higher in the free-FA fraction than in bound-FA in both Sybaris *** contrast,Carnaroli variety from Northern Italy displayed a higher content of free(5.3 mg g−1)than bound lipids(2.5 mg g−1)and a higher content of USFA in the *** antioxidant activity of Pavia rice extract was higher than that of both Sybaris ***:The two Sybaris varieties are richer in lipids than the Pavia rice,while exhibiting the same qualitative fatty acid profile with some differences in the content of individual fatty *** distribution of lipids(free or bound)was found to be significantly different in the Carnaroli varieties,highlighting the effects of different climatic and pedological areas.

关键词： free and bound lipids radical scavenging free and bound phenolics

Removal of Lead,Copper,Zinc and Cadmium from Water Using Phosphate Rock

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Acta Geologica Sinica(English Edition) 2008年第6期82卷 1223-1228页

作者： alessia CORAMI Silvano MIGNARDI Vincenzo FERRINI Department of Earth Sciences University"La Sapienza"P.le A.Moro 500185 RomeItaly IGG-CNR(Sezione di Roma) c/o Department of Earth SciencesUniversity"La Sapienza"P.le A.Moro 500185 RomeItaly Department of Earth Sciences University "La Sapienza"P.le A.Moro 500185 RomeItaly

Removal of Pb^2＋, Cu^2＋, Zn^2＋ and Cd^2＋ from aqueous solutions by sorption on a natural phosphate rock （FAP） was investigated. The effects of the contact time and initial metal concentration were examined in the batch method. The percentage sorption of heavy metals from solution ranges generally between 50% and 99%. The amount of sorbed metal ions follows the order Cu〉Pb〉Cd〉Zn. Heavy metal immobilization was attributed to both surface complexation of metal ions on the surface of FAP grains and partial dissolution and precipitation of a heavy metal-containing phosphate. The very low desorption ratio of heavy metals further supports the effectiveness of FAP as an alternative and low-cost material to remove toxic Pb^2＋, Cu^2＋, Zn^2＋ and Cd^2＋ from polluted waters.

关键词： heavy metal ions phosphate rock sorption

Empowering digital twins with eXtended reality collaborations

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Virtual Reality & Intelligent Hardware 2022年第6期4卷 487-505页

作者： Lorenzo STACCHIO alessia ANGELI Gustavo MARFIA Department for Life Quality Studies University of BolognaItaly Department of Computer Science and Engineering University of BolognaItaly Department of the Arts University of BolognaItaly

Background The advancements of Artificial Intelligence,Big Data Analytics,and the Internet of Things paved the path to the emergence and use of Digital Twins(DTs)as technologies to“twin”the life of a physical entity in different fields,ranging from industry to *** the same time,the advent of eXtended Reality(XR)in industrial and consumer electronics has provided novel paradigms that may be put to good use to visualize and interact with *** technologies can support human-to-human interactions for training and remote assistance and could transform DTs into collaborative intelligence *** We here present the Human Collaborative Intelligence empowered Digital Twin framework(HCLINT-DT)integrating human annotations(e.g.,textual and vocal)to allow the creation of an all-in-one-place resource to preserve such *** framework could be adopted in many fields,supporting users to learn how to carry out an unknown process or explore others’past *** The assessment of such a framework has involved implementing a DT supporting human annotations,reflected in both the physical world(Augmented Reality)and the virtual one(Virtual Reality).Con-clusions The outcomes of the interface design assessment confirm the interest in developing HCLINT-DT-based ***,we evaluated how the proposed framework could be translated into a manufacturing context.

关键词： Digital twin eXtended reality Human collaborative intelligence

Efficient and sustainable V-catalyzed oxidative desulfurization of fuels assisted by ionic liquids

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燃料化学学报 2018年第9期46卷 1121-1129页

作者： alessia Coletti Federica Sabuzi Barbara Floris Pierluca Galloni Valeria Conte Department of Chemical Science and Technologies University of Rome Tor Vergatavia della Ricerca Scientifica sncRome 00133Italy BT-InnoVaChem srl Academic Spin-Offc/o University of Rome Tor Vergatavia della Ricerca Scientifica sncRome 00133Ita

Fuel desulfurization is an appealing topic for the chemical industry since severe environmental regulations regarding SO_2 emissions have been legislated in many countries. In order to reduce the amount of sulfur-containing compounds in fuels,responsible for high SO_x emission levels,a green chemistry approach is compulsory. In this paper,vanadium salen and salophen complexes were used in the oxidation of a model aromatic sulfide,such as dibenzothiophene( DBT),in the presence of H_2O_2 as green oxidant. The oxidative process was successfully coupled with the extraction of the oxidized compounds by ionic liquids. The system resulted highly selective for sulfide oxidation,showing poor reactivity toward the oxidation of alkenes and allowing a significant reduction of S content in a model benzine. To note,the use of microwave in place of standard heating allowed to obtain 98% of DBT oxidation and almost complete sulfur extraction in the model fuel in 1000 s. For these reasons,this system was considered an easy,rapid and clean process to achieve fuel desulfurization.

关键词： fuel desulfurization V-catalysis sustainability ionic liquids microwaves

The Imago of Revolution Psychoanalysis and Class Consciousness An Introduction to Psychoanalysis and Class Consciousness （...and Some Extracts from the Dialectics Money/Death Drive）

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Fudan Journal of the Humanities and Social Sciences 2017年第4期10卷 485-508页

作者： alessia J. Magliacane Centre Georg Simmel Ecole des Hautes Etudes en Sciences Sociales de Paris Paris France

For the purpose of the investigations, we propose in the present paper that we have been carrying out for some years into new perspectives for a Marxist Psychoanalysis; we try the consistence of Marxist psychoanalysis with the pre- Leninist idea of Class consciousness as developed in Economic and Philosophic Manuscripts of 1844 and in the unpublished books of Das Kapital （notably the law of the tendency of the rate of profit to fall）. The roots of Freudian Marxists （Reich and Fenichel above all, but Sabina Spielrein too） are put into a comparative analysis with Marxian psychiatry arising from the de-colonization process （Fanon） and with the teaching of Jacques Lacan about Marxist concepts such as plus value and reification, and eventually with the proposal on the political Unconscious developed by Fredric Jameson. Finally, it comes the hypothesis that Psychoanalysis could correspond to Class consciousness.

关键词： Class consciousness - Psychoanalysis - Political Unconscious Fantasyof destruction Drive to amass wealth Surplus-enjoyment Revolution Marxand Lacan

Introduction Contextualizing the 2016 G20： Global Analyses and Challenges for the Chinese Presidency

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China & World Economy 2016年第4期24卷 1-4页

作者： alessia Amighini Andrea Goldstein Professor of Economics Department of Economics and Business Universita del Piemonte Orientale Novara Italy.

China＇s G20 presidency, with its core theme of ＂Towards an Innovative, Invigorated, Interconnected and Inclusive World Economy＂ is as important for China as for the world economy. For China, the 2016 presidency allows it to showcase its unique route to development and poverty reduction, so effectively shepherded over the past three decades. Therefore, heading the G20 is a timely opportunity to define China＇s role in global economic governance by setting goals that are both ambitious and realistic and by promoting its own initiatives and principles for the global common good. For the G20, this relatively new format of global governance has been increasingly criticized for being a talking shop, where statements follow declarations with little impact, with little success in giving new impetus to the global economy. In 2016, a number of new challenges are coming to the fore： world GDP growth is projected to fall below its long- term average, global trade is slowing down, and investment flows are declining. Against the backdrop of accumulating economic and geopolitical headwinds shaking many countries and regions, G20 leaders need to cooperate more than ever to restore sustained and sustainable growth.

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p38α MAPK pathway:A key factor in colorectal cancer therapy and chemoresistance

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World Journal of Gastroenterology 2014年第29期20卷 9744-9758页

作者： Valentina Grossi alessia Peserico Tugsan Tezil Cristiano Simone Division of Medical Genetics Department of Biomedical Sciences and Human Oncology (DIMO)University of Bari "Aldo Moro" National Cancer Institute IRCCS Oncologico Giovanni Paolo Ⅱ Fondazione Mario Negri Sud Santa Maria Imbaro 66030 (CH)Italy

Colorectal cancer (CRC) remains one of the most common malignancies in the world. Although surgical resection combined with adjuvant therapy is effective at the early stages of the disease, resistance to conventional therapies is frequently observed in advanced stages, where treatments become ineffective. Resistance to cisplatin, irinotecan and 5-fluorouracil chemotherapy has been shown to involve mitogen-activated protein kinase (MAPK) signaling and recent studies identified p38α MAPK as a mediator of resistance to various agents in CRC patients. Studies published in the last decade showed a dual role for the p38α pathway in mammals. Its role as a negative regulator of proliferation has been reported in both normal (including cardiomyocytes, hepatocytes, fibroblasts, hematopoietic and lung cells) and cancer cells (colon, prostate, breast, lung tumor cells). This function is mediated by the negative regulation of cell cycle progression and the transduction of some apoptotic stimuli. However, despite its anti-proliferative and tumor suppressor activity in some tissues, the p38α pathway may also acquire an oncogenic role involving cancer related-processes such as cell metabolism, invasion, inflammation and angiogenesis. In this review, we summarize current knowledge about the predominant role of the p38α MAPK pathway in CRC development and chemoresistance. In our view, this might help establish the therapeutic potential of the targeted manipulation of this pathway in clinical settings.

关键词： p38 mitogen-activated protein kinase Chemoresistance Molecularly-targeted drugs Colorectal cancer Cell death

Single-run reversed-phase HPLC method for determining sertraline content,enantiomeric purity,and related substances in drug substance and finished product

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Journal of Pharmaceutical Analysis 2020年第6期10卷 610-616页

作者： alessia Rosetti Rosella Ferretti Leo Zanitti Adriano Casulli Claudio Villani Roberto Cirilli National Centre for the Control and Evaluation of Medicines Chemical Medicines UnitIstituto Superiore di Sanita(ISS)Viale Regina Elena 29900161RomeItaly Department of Chemistry and Technology of Drugs Sapienza University of Rome00185RomeItaly WHO Collaborating Centre for the Epidemiology Detection and Control of Cystic and Alveolar EchinococcosisEuropean Union Reference Laboratory for ParasitesIstituto Superiore di Sanita(ISS)Viale Regina Elena 29900161RomeItaly

A direct enantio-,diastereo-,and chemo-selective high-performance liquid chromatographic method was developed for determining the content,enantiomeric purity,and related substances of the chiral antidepressant drug sertraline HCl in a single chromatographic *** separation was achieved on a chiral stationary phase based on amylose tris(3-chloro-5-methylphenylcarbamate)under reversed-phase *** method was optimized by evaluating the influence of the temperature and mobile phase composition on the retention and *** application of the single-run approach allowed to baseline resolve all investigated species in less than 15 min,without using buffers or tandem-coupled *** chromatographic method was validated according to the guidelines of the Official Medicines Control Laboratory and applied to control the content of sertraline HCl and related chiral substances in a generic antidepressant formulation.

关键词： Chiralpak IG-3 Enantiomers Diastereomers Reversed-phase enantioselective HPLC Sertraline HCl