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Adsorption of rare earth elements onto diatomite M45:Experimental investigations and modeling with statistical physics theory

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Journal of Rare Earths 2023年第11期41卷 1805-1811,I0006页

作者： Fatma Dhaouadi Guilherme L.Dotto Julien Vieillard Diana Pinto Luis F.O.Silva Éder C.Lima Mu Naushad Fatma Aouaini Samia Nasr Adrián Bonilla-Petriciolet abdelmottaleb ben lamine Laboratory of Quantum and Statistical Physics LR18ES18Faculty of Sciences of MonastirMonastir UniversityMonastirTunisia Research Group on Adsorptive and Catalytic Process Engineering(ENGEPAC) Federal University of Santa MariaAv.Roraima1000-797105–900Santa MariaRSBrazil NormandieUniversité UNIROUENINSA RouenCNRSCOBRA(UMR 6014)27000EvreuxFrance Universidad De La Costa Calle 58#55-66080002BarranquillaAtlánticoColombia Advanced Materials Research Chair Department of ChemistryCollege of ScienceKing Saud UniversityRiyadh11451Saudi Arabia Department of Chemistry College of ScienceBuilding#5King Saud UniversityRiyadhSaudi Arabia Department of Physics College of SciencePrincess Nourah Bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Research Center for Advanced Materials Science(RCAMS) King Khalid UniversityAbha61413P.O.Box 9004Saudi Arabia Chemistry Department Faculty of ScienceKing Khalid UniversityP.O.Box 9004Abha61413Saudi Arabia Instituto Tecnológico de Aguascalientes 20256AguascalientesMexico

The separation of rare earth elements using diatomite M45 from aqueous solutions was *** experimental isotherms for the adsorption of trivalent lanthanum,cerium,and neodymium cations on this adsorbent were quantified under strongly acidic conditions(pH 2)at 298-328 *** adsorption equilibria of these earth elements were analyzed using two statistical physics models(homogeneous and heterogeneous monolayer models).The results show that the adsorption of these ions implies a multiionic mechanism,which is ***-containing functional groups are responsible for the adsorption of these rare-earth elements on the diatomite surface.A heterogeneous statistical physics model confirms that two Si-based functional groups participate in the separation of these *** calculated adsorption capacities at saturation follow the order:neodymium>cerium>*** interaction energies range from 28600 to 40100 J/mol,indicating physical adsorption on diatomite *** study demonstrates that diatomite M45 is a promising separation medium that can be used for the recovery of REEs dissolved in aqueous solutions via adsorption.

关键词： Lanthanum Cerium Neodymium Adsorption Diatomite M45 Statistical physics model

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Unusual Location of Coelomic Cysts

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Open Journal of Respiratory Diseases 2018年第3期8卷 33-37页

作者： Smadhi Hanen ben Jemai Emna Diouani Mohamed Fethi Abdennadhar Mahdi Attia Monia Ayadi-Kaddour Aida Megdiche Mohamed lamine Department of Pneumology Ibn Nafis Abderrahman Mami University Hospital Ariana Tunisia Faculté de Médecine de Tunis Université Tunis El Manar Tunis Tunisia. Faculté des Sciences de Bizerte Université de Carthage Carthage Tunisia. Laboratoire d’Epidémiologie et de Microbiologie Vétérinaire Institut Pasteur de Tunis Tunis Tunisia Department of Thoracic Surgery Abderrahman Mami University Hospital Ariana Tunisia Department of Radiology Abderrahman Mami University Hospital Ariana Tunisia Department of Pathology Abderrahman Mami University Hospital Ariana Tunisia

Intrathoracic mesothelial cysts are congenital lesions due to an abnormal development of the pericardial coelom. They are generally unilocular and can develop in various sites. We describe a case of multicystic lesions in the anterior mediastinum of a 53-year-old woman discovered in a context of an encysted pleural effusion. Chest computed tomography (CT) scan revealed multiple cystic lesions in the anterior and posterior mediastinum. Surgery was carried out and histopathology and immunohistochemistry confirmed the diagnosis of multiple coelomic cysts of the mediastinum.

关键词： Mesothelial Cysts Mediastinum Surgery Pathology

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Ureteroscopy with Holmium: YAG Laser—A Initial Study in the Urology Department of the Pr Bocar Sidy Sall University Hospital of Kati

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Open Journal of Urology 2024年第4期14卷 207-216页

作者： Amadou Kassogue Idrissa Sissoko Daouda Sangare Moussa Salifou Diallo Hamed Sylla Mahamadou Traore Boureima Coulibaly Salia Coulibaly Modibo Diakite Modibo Togola Fadima Tall Ilias Guindo ben Naoum Kamel Mamadou lamine Diakite Urology Department University Hospital of Pr Bocar Sidy Sall Kati Mali Radiology Department University Hospital of Pr Bocar Sidy Sall Kati Mali Anesthesy and Reanimation Department University Hospital of Pr Bocar Sidy Sall Kati Mali Urology Department University Hospital Nimes France Urology Department University Hospital of Point G Bamako Mali

Introduction: Ureteroscopy is a minimally invasive endoscopic surgery which provides access to the ureter, pyelon and calyceal cavities via the urethra and the bladder. Laser ureteroscopy uses the laser as an energy source to treat the stone and eliminate it naturally. Minimally invasive endoscopic methods are struggling to become popular in sub-Saharan African countries, especially for the upper urinary tract. The objective of our work was to report the results of our first laser ureteroscopy experience in the department. Materials and Methods: This was a prospective and descriptive study running from December 1, 2023 to February 19, 2024. Included in our study was any case of upper urinary tract stone operated by Laser ureteroscopy. The characteristics of the lithiasis were determined by CT scan. Sterilization of urine was verified by carrying out a cytobacteriological examination of urine. Ureteral lithiasis was approached by semi-rigid ureteroscopy. Renal lithiasis was immediately addressed by flexible ureteroscopy. Ureteroscopy was coupled with a Holmium YAG laser. A double J ureteral catheter was placed after the operation. A 230 µm laser fiber was used in each case with a generator with a power of 35 watts (Storz Calculase III type). An access sheath was used in all cases of flexible ureteroscopy. The parameters studied were: sociodemographic characteristics, lithiasis (site, size, number, density, topography), type of anesthesia, duration of laser use, duration of intervention, postoperative outcomes. Data entry and analysis were carried out using the software (Word 2016 and SPSS). Result: We collected 30 cases of laser ureteroscopy. The average age was 37 years with extremes of 9 and 79 years. The male gender was more represented. The most common age group was 24-39 years old. Renal colic was the most frequent reason for admission, 12 patients (40%). On physical examination, lumbar tenderness was present in 47% (14 patients). ECBU was positive in 4 patients

关键词： Ureteroscopy Semi-Rigid Flexible Holmium YAG Laser

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Endoscopic Treatment of Esophageal Achalasia: Experience of the Hepato-Gastroenterology Service of Fez

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Open Journal of Gastroenterology 2019年第8期9卷 164-173页

作者： Houda Meyiz Asmae lamine Mounia El Yousfi Nourdin Aqodad Mohammed El Abkari Adil Ibrahimi Dafr Allah benajeh Ihssane Mellouki Department of Hepato-Gastroenterology University Hospital Hassan II Fez Morocco Faculty of Medicine-Fez University Sidi Mohammed Ben Abdellah Fez Morocco

The achalasia is a rare primary esophageal motor disorder characterized by relaxation disorders of the lower esophageal sphincter and absence of the esophageal body peristalsis. Several studies suggest that the response to the endoscopic treatment depends on several predictors. The aim of our study was to evaluate the endoscopic treatment of esophageal achalasia and identify the predictive factors of endoscopic treatment response. Patients and Methods: This is a retrospective analytical study of 78 patients with achalasia, managed in the gastroenterology department of the university medical center Hassan II-Fez, during a period of 5 years (January 2009 to December 2014). The diagnosis of achalasia was retained on a set of clinical, endoscopic, manometric and radiological arguments. A graded dilation protocol starting with a 35 mm balloon three times for 30 seconds in progressive pressure between 5 and 8 psi was performed. We used the Eckardt score to evaluate the clinical remission. Results: During the study period, 78 patients were included. The average age of our patients was 47 years old [18 - 81] with a sex-ratio M/F of 1.05. The average of Eckardt score before dilation was 5.9 [3 - 9]. An average of 1.41 dilation sessions was performed per patient with 85.9% of the initial success rate (n = 67). Initial success without further dilation sessions was achieved in 55.1% of our patients (n = 43). A clinical recurrence requiring further dilation sessions was observed in 30.8% of the cases (n = 24). The average relapse time after first dilation success was 2.7 years, 75% occurs within the first year. Dilation failure was retained in 14 patients (17.9%) requiring surgery. Only one post-dilation perforation was noted. In multivariate analysis, only odynophagia and the number of dilatation sessions were factors of failure of the endoscopic dilation. Conclusion: Pneumatic dilation is a minimally morbid and effective procedure. Our work showed that odynophagia, and the num

关键词： Achalasia Pneumatic Dilatation Manometry Eckardt Score

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The Impact of Gastroesophageal Reflux on the Quality of Life: About a Series of 100 Patients at Fez University Hospital

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Open Journal of Gastroenterology 2019年第6期9卷 99-108页

作者： Houda Meyiz Mohammed El Agheb Asmae lamine Mounia El Yousfi Nordin Aqodad Dafr benajeh Mohammed El Abkari Adil Ibrahimi Ihsane Mellouki Hepato-Gastroenterology Department Hassan II University Medical Center Fez Morocco Faculty of Medicine Sidi Mohammed Ben Abdellah University Fez Morocco

The gastroesophageal reflux disease (GERD) represents a major problem for public health because of its high prevalence. The chronic character of the symptoms can have a very important impact on the quality of life (QoL). The purpose of this study is to assess the impact of the GERD on the quality of life of our patients and to determine the main aggravating factors. Patients and Methods: This is a cross-sectional, observational study of 100 patients presenting signs of GERD in the gastroenterology department of the university medical center Hassan II-Fez, for a period of 3 months (October to December 2014). We used the Reflux-Qual short form (RQS®) to evaluate the QoL of our patients. Results: Over the study period, 100 patients were included. The average age of our patients was 47 years [20 - 75 years] with a sex-ratio F/M in 2.12. Among our patients, 20% (n = 20) were chronic cigarette smokers. The diagnosis of GERD was clinical in 75% of the cases (n = 75) and based on 24-hour pH monitoring in the remaining 25% (n = 25). Approximately 2/3 of the patients were receiving proton pump inhibitors (PPIs) treatment at the time of the questionnaire. The impairment of QoL was moderated to severe (RQS® p = 0.01), female sex (p = 0.03) and the frequency of symptoms (p = 0.001). Moreover, patients having a GERD that requiring a daily and continuous administration of PPIs had a lower index of RQS® (p = 0.001). The quality of life impairment was not associated with chronic cigarette smoking (p = 0.3). Conclusion: The impairment of the QoL was moderated to severe (RQS® < 16) for 2/3 of the patients (n = 62). This impairment was associated with elderly, female sex, frequency and in case of GERD requiring continuous administration of PPIs.

关键词： Gastroesophageal Reflux Reflux-Qual Short Form Quality of Life

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Portal Vein Thrombosis in Non Cirrhotic Patients: Experience of Gastroenterology and Hepatology Department University Hospital Hassan II

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Open Journal of Gastroenterology 2020年第12期10卷 349-356页

作者： Nada Lahmidani Mariam El Khayari Maria Lahlali Asmae lamine Hakima Abid Mounia El Yousfi Dafr Allah benajah Sidi Adil Ibrahimi Mohammed El Abkari Department of Gastroenterology and Hepatology School of Medicine and Pharmacy of Fez University Hospital Hassan II University Sidi Mohammed Ben Abdallah Fez Morocco

Portal thrombosis (PT) is a rare condition of heterogeneous etiologies. The aim of our work is to study the epidemiological and etiological profile of portal thrombosis in non cirrhotic patients through the experience of our department. Patients and Methods: This is a retrospective study over a 9-year period (January 2009-July 2018), 54 cases of PT in non cirrhotic patients were collected in the department of Hepato-Gastro-Enterology of the HASSAN II Fez Hospital, 73 cases of PT were excluded among cirrhotic patients. Results: We collected 54 cases of PT cases;the average age was 45 years, with an F/M ratio of 1.42. PT was revealed by abdominal pain in 20 cases, complications of portal hypertension in 24 cases, and ultrasound discovery in 10 asymptomatic cases. Main underlying causes of PT were: A proteine S deficiency in 7 cases, Acute pancreatitis in 5 cases, colonic cancer in 4 cases, pancreatic cancer in 4 cases, Hydatic liver Echinococcoses (3 cases), anti phospholipid syndrom (3 cases), myeloproliferative syndrom (2 cases) and jak mutation 2 in 1 case, non identified etiology was reported in 20 cases (37%). Treatment was based on anticoagulation, treatment of portal hypertension complications, and etiological treatment in cases where etiological diagnosis was certainly posed. Conclusion: PT is a rare but serious condition, according to our study neoplastic causes are predominant followed by protein S deficiency. Etiological investigations have to be wide and early treatment is the best option to avoid extension and complication.

关键词： Portal Thrombosis Etiology Anticoagulant Non Cirrhotic

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Interest of Sclerosing Injections in Hemorrhoidal Pathology: Experience of the Service of Hepato-Gastroenterology of Fez

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Open Journal of Gastroenterology 2019年第1期9卷 36-42页

作者： H. Abid R. benjira M. Lahlali A. lamine N. Lahmidani M. Elyousfi N. Aqodad D. benajah A. Ibrahimi M. Elabkari Hepato-Gastroenterology Department Hassan II University Medical Center Fez Morocco Faculty of Medicine Sidi Mohammed Ben Abdellah University Fez Morocco

Hemorrhoids are a clinical and anatomical subject that has not been completely investigated [1]. This benign condition is expressed by intermittent functional manifestations as rectorrhagies and prolapse. while the medical treatments seek to relieve symptoms, the instrumental ones are intended to reposition and hold the hemorrhoids in an anatomically correct position and to reduce their vascularity [1]. Indeed, sclerotherapy seems an effective and safe method in fact. Aim of the Study: To report the results of a moroccan series of patients treated with sclerosing injections, emphasizing short- and long-term efficacy as well as the rate of complications. Methods: This is a descriptive retrospective study of the 148 patients with symptomatic internal hemorrhoids who have been treated with sclerotherapy in the gastroenterology department of the university medical center of Fez over a period of 17 years [2001-2018]. Results: The average age of our patients is 47.1 years [19 - 86]. We notified a large male predominance with a sex ratio M/F 2.58. Rectorrhagies and prolapse were the most frequent reasons for consultation;they were respectively notified in 96% (n = 143) and 83% of patients (n = 123). Anemia was found in 45 cases (30.4%), of which 29 cases required transfusion. Proctologic examination found internal hemorrhoids grade 2 in 83% (n = 124) and grade 1 in 16.2% (n = 24) of patients. Initial success was found in 119 cases (80.4%) after an average of 2.25 sessions (1 - 4). Nine patients (8, 11%) had minor complications dominated by minimal rectorrhagies in 8 cases, resolved spontaneously. In 29 cases (19.5%), the sessions were interrupted following a failure of the technique in 12 cases (41.3%), in 11 cases after change of the stage of hemorrhoids of stage II to III, in 4 cases following the appearance of an anal fissure contraindicating the procedure, and in 2 cases due to severe pain post sclerosis. Among these 29 cases, 13 patients were referred for surgery, whi

关键词： Internal Hemorrhoids Sclerosing Injection Evolution Complications

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The Elastic Ligation of Internal Hemorrhoids: Where Are We Now?

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Open Journal of Gastroenterology 2019年第1期9卷 28-35页

作者： H. Abid G. Ousseur R. benjira M. Lahlali A. lamine N. Lahmidani M. El Yousfi N. Aqodad D. benajah A. Ibrahimi M. El Abkari Hepato-Gastroenterology Department Hassan II University Medical Center Fez Morocco Faculty of Medicine Sidi Mohammed Ben Abdellah University Fez Morocco

Hemorrhoidal disease requires different means of treatment: medical, surgical and instrumental. Among these, the elastic ligature seems to be an effective and widespread technique in the world. The aim of our study is to report our experience in methodology and short and medium term results of ligation in a population that strongly fears surgery. Patients and Methods: It’s about a retrospective and descriptive study of 208 outpatients treated with elastic ligations for symptomatic internal hemorrhoids. These patients were collected over a period of 15 years (October 2003-April 2018) at the gastroenterology department of Hassan II CHU in Fez. Results: The average age of our patients was 50.3 years [20 - 82 years] with a sex-ratio M/F of 2.85. The clinical signs were dominated by rectorrhagia (99%) complicated by anemia in 116 cases requiring blood transfusion in 72 cases, followed by proctalgia (27.4%). Transit disorders were noted in 65 patients (31.2%). Indications for elastic ligation were symptomatic internal hemorrhoids Grade 3 (65.4%) and Grade 2 (34.6%). The average number of ligation sessions that achieved the therapeutic goal was 2.30 sessions [1 - 4]. The average number of rings per session was 3.1 rings [1 - 6]. Moderate to severe pain was reported by 20 patients (9.6%) mostly within 6 hours of ligation. Minimal rectorrhagia was reported in 33 cases (15.8%). There were no major complications who required a hospitalization. The success rate was 80.7% (n = 168). Surgery was performed in 31 patients (14.9%) and sclerosis in 7 patients (3.3%). Conclusion: The elastic ligation of internal hemorrhoids remains an effective and inexpensive technique when it comes to the treatment of symptomatic internal hemorrhoids of Grade 2 to 3. The results obtained in our study were very reassuring and motivating.

关键词： Internal Hemorrhoids Elastic Ligature Evolution

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