Adsorption of Bisphenol A on KOHactivated tyre pyrolysis char

International audienceAn activated carbon (AC) with a specific surface area of 700 m 2 g-1 was prepared by KOH activation of tyre pyrolysis char (TPC) and tested to remove Bisphenol A (BPA) from aqueous solutions. BPA adsorption on this AC was evaluated by studying both the adsorption isotherms at three different temperatures and the decrease of BPA concentration with time, in order to determine the thermodynamic and the kinetic parameters, respectively. The results were compared with those obtained with pristine TPC and with a multipurpose commercial activated carbon (CAC) recommended for BPA adsorption. The present KOH-activated TPC showed a great potential to adsorb BPA with a monolayer capacity as high as 123 mg g-1 , higher than that of the CAC used as a reference. BPA adsorption equilibrium data were fitted using different isotherm models with two or three parameters, and the best fitting models were those of Langmuir and Radke-Prausnitz. BPA adsorption was an exothermic process, and the adsorption capacity decreased with increasing temperature. The adsorption kinetics of BPA was adequately described by a pseudo-second order model

Anterior/Apical single incision mesh (Elevate™): Surgical experience, anatomical and functional results, and long-term complications

Objective: Pelvic organ prolapse is a common condition among post-menopausal women, and surgery is often the standard treatment proposed. Native tissue vaginal surgery is burdened by a high rate of recurrence, and mesh vaginal surgery has become current practice. The purpose of this study was to evaluate the safety and the effectiveness of the vaginal kit Anterior/Apical single incision mesh Elevate™ for the correction of anterior and apical compartment prolapse. Study design: Data of patients with symptomatic anterior vaginal prolapse stage ≥ II, receiving mesh repair with the Anterior/Apical Elevate single incision system between January 2010 and January 2015 were retrieved. Prolapse was classified according to the POP-Q system. The main outcome measure was anatomical success, while subjective and safety outcomes were secondary outcomes. Results: Anatomical success rate was 87.2 % for anterior compartment prolapse and 84.6 % for combined anterior and apical prolapse, while overall functional success rate was 96.2 % after a median follow-up of 33.6 months. The most frequent short-term complications were urinary bladder injury (3.0 %) and transient urinary retention (6.9 %). The most common long-term complications were de novo or persistent symptomatic stress urinary incontinence (10.8 %) and vaginal mesh extrusion (3.8 %). Conclusion: Mesh vaginal surgery with Anterior/Apical single incision mesh Elevate™ is a well-tolerated procedure with a very high anatomical and functional success rate. Short and long-term complications rate seem to be acceptable, and in most of cases, solvable. Further studies are needed to confirm our promising data

Classical and nerve-sparing radical hysterectomy: An evaluation of the risk of injury to the autonomous pelvic nerves

Radical hysterectomy represents the treatment of choice for FIGO stage IA2-IIA cervical cancer. It is associated with several serious complications such as urinary and anorectal dysfunction due to surgical trauma to the autonomous nervous system. In order to determine those surgical steps involving the risk of nerve injury during both classical and nerve-sparing radical hysterectomy, we investigated the relationships between pelvic fascial, vascular and nervous structures in a large series of embalmed and fresh female cadavers. We showed that the extent of potential denervation after classical radical hysterectomy is directly correlated with the radicality of the operation. The surgical steps that carry a high risk of nerve injury are the resection of the uterosacral and vesicouterine ligaments and of the paracervix. A nerve-sparing approach to radical hysterectomy for cervical cancer is feasible if specific resection limits, such as the deep uterine vein, are carefully identified and respected. However, a nerve-sparing surgical effort should be balanced with the oncological priorities of removal of disease and all its potential routes of local spread