A study of biochemical route on construction of waste battery ferrite applying for nickel removal

Abstract

Mn-Zn ferrite (Mn_1 − xZn_x Fe₂O₄, x = 0.2, 0.4, 0.6, and 0.8) nanomaterials were prepared by bioleaching and hydrothermal synthesis from waste Zn-Mn batteries. The materials were characterized by XRD, SEM, BET, VSM, CEC, and isoelectric point. It turned out when x = 0.4, synthesized Mn-Zn ferrite had best performance which was nanoferrite crystal structure with a specific surface area that reached 37.77 m²/g, the saturation magnetization was 62.85 emu/g, and isoelectric point and the CEC value were 7.33 and 43.51 mmol/100 g, respectively. In addition, the adsorption characteristics on Ni²⁺ were explored. The results of experiment suggested that data was more in line with the Freundlich model compared with Langmuir and Dubinin-Radushkevich isotherm models. Kinetics studies showed that pseudo-second-order kinetics was more suitable for describing the Ni²⁺ adsorption process where the maximum theoretical adsorption quantity was 52.99 mg/g. Thermodynamic parameters indicated the adsorption process can be spontaneous as an endothermic reaction, and warming was advantageous to adsorption. Besides, the adsorbent could be reused for six cycles with high removal efficiency. The magnetic and adsorptive properties of the adsorbent were promising, which had a high application value.

Graphical abstract

Fabrication process of nanometer ferrite by biological technology and hydrothermal synthesis for removal of Ni2+

Methylmercury and diphenyl diselenide interactions in Drosophila melanogaster: effects on development, behavior, and Hg levels

Abstract

Methylmercury (MeHg) is a highly toxic environmental pollutant which binds with a high affinity to selenol groups. In view of this, seleno-compounds have been investigated as MeHg antidotes. In the present study, we evaluated the effects of the co-exposure to MeHg and the seleno-compound diphenyl diselenide (PhSe)₂ on Drosophila melanogaster. We measured the survival rate, developmental survival, locomotor ability, reactive oxygen species (ROS) production, and Hg levels in D. melanogaster exposed to MeHg and/or (PhSe)₂ in the food. Exposure to MeHg caused a reduction in the survival rate, developmental survival, and locomotion in D. melanogaster. In addition, MeHg increased the ROS production and mercury levels in flies. The co-exposure to MeHg and (PhSe)₂ did not prevent the toxic effects of MeHg in D. melanogaster. On the contrary, the co-exposure enhanced the toxic effects on the locomotor ability and developmental survival. This effect may be explained by the fact that the co-exposure increased the Hg levels in body when compared to flies exposed only to MeHg, suggesting that MeHg and (PhSe)₂ interaction may increase Hg body burden in D. melanogaster which could contribute for the increased toxicity observed in the co-exposure.

Performance of Bi 2 O 3 /TiO 2 prepared by sol-gel on p-Cresol degradation under solar and visible light

Abstract

Photocatalytic degradation of p-Cresol was evaluated using the mixed oxide Bi₂O₃/TiO₂ (containing 2 and 20% wt. Bi₂O₃ referred as TB2 and TB20) and was compared with bare TiO₂ under simulated solar radiation. Materials were prepared by the classic sol-gel method. All solids exhibited the anatase phase by X-ray diffraction (XRD) and Raman spectroscopy. The synthesized materials presented lower crystallite size and Eg value, and also higher surface area as Bi₂O₃ amount was increased. Bi content was quantified showing near to 70% of theoretical values in TB2 and TB20. Bi₂O₃ incorporation also was demonstrated by X-ray photoelectron spectroscopy (XPS). Characterization of mixed oxides suggests a homogeneous distribution of Bi₂O₃ on TiO₂ surface. Photocatalytic tests were carried out using a catalyst loading of 1 g L⁻¹ under simulated solar light and visible light. The incorporation of Bi₂O₃ in TiO₂ improved the photocatalytic properties of the synthesized materials obtaining better results with TB20 than the unmodified TiO₂ under both radiation sources.

Water decontamination containing nitrate using biosorption with Moringa oleifera in dynamic mode

Abstract

This study was conducted to assess the feasibility of using Moringa oleifera Lam. (MO) seeds in the biosorption of nitrate present in aqueous solutions by means of batch and fixed-bed column biosorption processes. The batch assays showed that nitrate biosorption is enhanced under experimental conditions of pH 3 and a biosorbent mass of 0.05 g. For the experiments in dynamic mode, the results obtained from the statistical parameters showed that lesser pH, lesser feed flow rate, and higher initial concentration will result in an increase of the maximum capacity of the bed. These conditions were confirmed by experimental analysis. The best experimental conditions, according to the values for percentage removal (91.09%) and maximum capacity (7.69 mg g⁻¹) of the bed, were those used in assay 1, which utilized pH 3, feed flow rate of 1 mL min⁻¹, and initial nitrate concentration of 100 mg L⁻¹.

Effects of physical and chemical aspects on membrane fouling and cleaning using interfacial free energy analysis in forward osmosis

Abstract

Natural organic matter (NOM) in micro-polluted water purification using membranes is a critical issue to handle. Understanding the fouling mechanism in the forward osmosis (FO) process, particularly identifying the predominant factor that controls membrane fouling, could have significant effects on exerting the advantages of FO technique. Cellulose triacetate no-woven (CTA-NW) membrane is applied to experiments with a high removal efficiency (> 99%) for the model foulant. Tannic acid (TA) is used as a surrogate foulant for NOM in the membrane fouling process, thus enabling the analysis of the effects of physical and chemical aspects of water flux, retention, and adsorption. The membrane fouling behavior is affected mainly by the combined effects of the osmotic dragging force and the interaction of the pH in the working solution, foulants, and calcium ions, as demonstrated by the water flux loss and the changes of membrane retention and adsorption. The fouled CTA-NW membrane (in PRO mode) could be flux-recovered by > 85% through physical cleaning methods. The interfacial free energy analysis theory was used to analyze the membrane fouling behavior with calculating the interfacial cohesion and adhesion free energies. The cohesion free energy refers to the deposition of foulants (TA or TA combined with calcium ions) on a fouled membrane. In addition, the adhesion free energy could be used to evaluate the interaction between foulants and a clean membrane.

Mesotherapy with Botulinum toxin for the treatment of refractory vascular and papulopustular rosacea

Cutaneous Features and Diagnosis of Primary Sjogren’s Syndrome: An Update and Review

SS is diagnostically challenging due to clinical and immunologic features which overlap with other connective tissue diseases, SS patients with cutaneous vasculitis, especially cryoglobulinemic vasculitis, have worse prognosis with increased risk of systemic vasculitis and lymphoma. SS patients with photosensitive annular erythema tend to have milder systemic and glandular involvement, Characteristic cutaneous features of SS are early diagnostic signs correlating with prognosis.

Increased Severity and Epidermal Alterations in Persistent versus Evanescent Skin lesions in Adult Onset Still’s disease

Adalimumab Alleviates Skin Pain in Patients with Moderate to Severe Hidradenitis Suppurativa: Secondary Efficacy Results from the PIONEER I and PIONEER II Randomized Controlled Trials

Teaching pediatric dermoscopy in a resource limited setting

In response to Stiegel et al, “Prognostic value of sentinel lymph node biopsy according to Breslow thickness for cutaneous melanoma”

Reply to MS#JAAD-D-18-00555

Optimal Surgical Modality for Early Merkel Cell Carcinoma—Results from the National Cancer Data Base

Relative survival analysis in patients with stage I-II Merkel cell carcinoma treated with Mohs micrographic surgery or wide local excision

Undifferentiated Pleomorphic Sarcoma: Factors Predictive of Adverse Outcomes

Undifferentiated pleomorphic sarcoma (UPS) embodies various spindle cell tumors; we sought to identify those with aggressive behavior, Invasion beyond subcutaneous fat and tumor size >2 cm predicted more aggressive behavior, We propose subcategorization to superficial and deep UPS

Sirolimus Gel vs Placebo for Facial Angiofibromas in Patients With Tuberous Sclerosis Complex

This randomized clinical trial assesses the efficacy and safety of sirolimus gel, 0.2% vs placebo for treatment of angiofibromas and skin lesions in adult and pediatric patients with tuberous sclerosis complex.

Intralesional laser treatment for dermal fillers complications

Background: For complications due to filler treatments, in general two treatment regimens are advised: systemic drugs or surgical removal of the material. Another possible treatment option would be removal of the material by intralesional laser treatment (ILT) Methods: 242 patients with complications due to fillers were treated with intralesional laser treatment. Results: In the majority of patients an improvement was achieved (92%), in 9% the complication was resolved and in 3% it was not improved (rest unknown). Conclusion: Considering the large number of patients treated up to date, the efficacy and good safety profile of this treatment, we plead that ILT may be considered as a treatment option before surgery. Financial Disclosure Statement: Dr. Velthuis is trainer for Allergan (hyaluronic acid and botulin toxin), the other authors have nothing to disclose. No funding was received for this article. Corresponding author: L.W. Schelke, MD, Department of Dermatology, Erasmus MC, Postbus 2040, 3000 CA ROTTERDAM, The Netherlands. Lschelke@outlook.com ©2018American Society of Plastic Surgeons

The Role of Anastomotic Vessels in Controlling Tissue Viability and Defining Tissue Necrosis with Special Reference to Complications Following Injection of Hyaluronic Acid Fillers

BACKGROUND: Most target areas for facial volumization procedures relate to the anatomical location of the facial or ophthalmic artery. Occasionally, inadvertent injection of hyaluronic acid (HA) filler into the arterial circulation occurs, and unrecognised, is irreparably associated with disastrous vascular complications. Of note, the site of complications, irrespective of the injection site, is similar, and falls into only 5 areas of the face, all within the functional angiosome of the facial or ophthalmic artery. MATERIAL AND METHODS: Retrospective and prospective studies were made to assess the site and behaviour of anastomotic vessels connecting the angiosomes of the face and their possible involvement in the pathogenesis of tissue necrosis. In-vivo studies of pig and rabbit, and archival human total body and prospective selective lead oxide injections of the head and neck were analysed. Results were compared with documented patterns of necrosis following inadvertent HA intra-arterial injection. RESULTS: Studies showed the location of TRUE and CHOKE anastomoses connecting the facial artery with neighbouring angiosomes predicted the tissue at risk of necrosis following inadvertent intra-arterial HA injection. CONCLUSION: Complications related to HA injections are intimately associated with: (i) the anatomical distribution of TRUE and CHOKE anastomoses connecting the facial artery to neighbouring ophthalmic and maxillary angiosomes where CHOKE vessels define the boundary of necrosis of an involved artery but TRUE anastomoses allow free passage to a remote site; or possibly (ii) retrograde perfusion of HA into avalvular facial veins, especially in the periorbital region, and thereby the ophthalmic vein, cavernous sinus and brain. ** Joint first authors * Presented at 50 Years of Aesthetics, American Society of Aesthetic Plastic Surgeons (ASAPS ), San Diego California Meeting, 27 April – 2 May 2017. Financial Disclosure: The authors have no financial interest to declare in relation to the content of this article. Acknowledgments: We would like to thank Mrs Prue Dodwell for her help with preparing the manuscript and images. Thanks also to Dr Adam Gascoigne for assistance with the dissections and Dr Louie Ye for his time with the Literature Review. The work would not have been possible without support from Mr Jim Carroll and The Donald Ratcliffe and Phyllis Macleod Trust. Corresponding Author: Professor Ian Taylor, Taylor-Lab, Department of Anatomy and Neurosciences, University of Melbourne, Parkville, Victoria 3052, Email: g.taylor@unimelb.edu.au ©2018American Society of Plastic Surgeons

Quality of Surgical Outcomes Reporting in Plastic Surgery: A 15 Year Analysis of Complication Data

Background: Postoperative complication data are integral to assessing patient outcomes and identifying areas to improve quality in surgical care. Accurate appraisal of surgical techniques requires consistency and reliability in complication data reporting. The purpose of this study was to analyze the quality of complication reporting in plastic surgery. Methods: The authors critically reviewed the literature from January 1st, 2000 to December 31st, 2014 to identify articles reporting surgical outcomes after 3 index procedures (autologous breast reconstruction, prosthetic breast reconstruction and reduction mammaplasty). Studies were extracted from the journals Plastic and Reconstructive Surgery and Annals of Plastic Surgery. Two authors independently analyzed data using a modification of established criteria for complication reporting that incorporates 10 critical elements. Results: 296 articles reporting outcomes for 299,819 procedures in 249,942 patients were analyzed. Of the 10 reporting criteria, no articles met all criteria,

Immediate two-stage prosthetic breast reconstruction failure: radiation is not the only culprit

Background: Immediate prosthetic breast reconstruction produces a satisfactory aesthetic result with high levels of patient satisfaction. However, with the broader indication for post-mastectomy adjuvant radiation, many patients are advised against immediate breast reconstruction because of concerns of implant loss and infection particularly as most patients also require chemotherapy. This retrospective cohort study examines outcomes for patients who underwent immediate two-stage prosthetic breast reconstruction after mastectomy with or without adjuvant chemotherapy or radiotherapy (RT). Methods: Between 1998 and 2010, 452 patients undergoing two-stage prosthetic immediate breast reconstruction involving a total of 562 breasts were included in this study. Stage one was defined as insertion of the temporary expander and stage two insertion of the final silicone implant. Post-operative adjuvant radiotherapy was recommended with tissue expander in-situ for 114 patients. Complications, including loss of prosthesis, seroma and infection were recorded and analysed. Cosmetic result was assessed using a 4-point scale. Results: Post-operative prosthesis loss was 2.7%, 5.3% for patients undergoing adjuvant chemotherapy increasing to 11.3% for patients receiving chemotherapy+RT. Chemotherapy and radiotherapy independently were the main, statistically significant, risk factors for expander or implant loss; IRR: 13.85 (p=0.012) and 2.23 (p=0.027), respectively. Prosthesis loss for patients undergoing combination chemotherapy+RT was also significant; IRR: 4.791 (p