To efficiently remove organic and inorganic pollutants from leachate concentrate,an in situ coagulation-electrochemical oxidation(CO-EO)system was proposed using Ti/Ti_(4)O_(7)anode and Al cathode,coupling the“super-...To efficiently remove organic and inorganic pollutants from leachate concentrate,an in situ coagulation-electrochemical oxidation(CO-EO)system was proposed using Ti/Ti_(4)O_(7)anode and Al cathode,coupling the“super-Faradaic”dissolution of Al.The system was evaluated in terms of the removal efficiencies of organics,nutrients,and metals,and the underlying cathodic mechanisms were investigated compared with the Ti/RuO_(2)-IrO_(2)and graphite cathode systems.After a 3-h treatment,the Al-cathode system removed 89.0%of COD and 36.3%of total nitrogen(TN).The TN removal was primarily ascribed to the oxidation of both ammonia and organic-N to N_(2).In comparison,the Al-cathode system achieved 3-10-fold total phosphorus(TP)(62.6%)and metal removals(>80%)than Ti/RuO_(2)-IrO_(2)and graphite systems.The increased removals of TP and metals were ascribed to the in situ coagulation of Al(OH)_(3),hydroxide precipitation,and electrodeposition.With the reduced scaling on the Al cathode surface,the formation of Al^(3+)and electrified Al(OH)_(3)lessened the requirement for cathode cleaning and increased the bulk conductivity,resulting in increased instantaneous current production(38.9%)and operating cost efficiencies(48.3 kWh kg_(COD)^(−1)).The present study indicated that the in situ CO-EO process could be potentially used for treating persistent wastewater containing high levels of organic and inorganic ions.展开更多
From Nov. 1990 to Dec. 1993, 128 patients with histologically diagnosed cervical intraepithelial neoplasia (CIN) grade 1 or 2, were randomized treated with the follow-
A patient treated with a vitamin K antagonist (VKA) since the implantation of two mechanical heart valves developed acute anemia after the extraction of a tooth. This case report and data in the literature indicate a ...A patient treated with a vitamin K antagonist (VKA) since the implantation of two mechanical heart valves developed acute anemia after the extraction of a tooth. This case report and data in the literature indicate a need for specific measures before, during, and after oral surgery in patients taking anticoagulant therapy: 1) the bleeding risk should be evaluated before the procedure. The INR should be measured routinely, 2) the procedure should be scheduled early in the week to allow an evaluation at the fibrinolysis peak, i.e., 48 to 72 hours after surgery, which is the time of greatest risk of delayed bleeding, 3) the surgical procedure should be appropriate for the elevated bleeding risk, 4) postoperative monitoring is of the most importance, as bleeding is usually delayed in patients on VKA therapy, 5) when poor treatment adherence is expected, day-hospital admission is useful to ensure that the postoperative protocol is implemented properly and to detect early bleeding. The treatment of post-extraction acute anemia includes local hemostasis protocol with the revision of the socket followed by red-blood-cell pack transfusion. A daily fluindione dosage control, and a normal hemoglobin level will allow the patient to leave the hospital.展开更多
基金This research was supported by the Science and Technology Development Fund of Macao(No.0002/2019/AGJ&0104/2018/A3)the Research Committee of the University of Macao Project(No.MYRG2019-00045-FST&MYRG2020-00148-FST).
文摘To efficiently remove organic and inorganic pollutants from leachate concentrate,an in situ coagulation-electrochemical oxidation(CO-EO)system was proposed using Ti/Ti_(4)O_(7)anode and Al cathode,coupling the“super-Faradaic”dissolution of Al.The system was evaluated in terms of the removal efficiencies of organics,nutrients,and metals,and the underlying cathodic mechanisms were investigated compared with the Ti/RuO_(2)-IrO_(2)and graphite cathode systems.After a 3-h treatment,the Al-cathode system removed 89.0%of COD and 36.3%of total nitrogen(TN).The TN removal was primarily ascribed to the oxidation of both ammonia and organic-N to N_(2).In comparison,the Al-cathode system achieved 3-10-fold total phosphorus(TP)(62.6%)and metal removals(>80%)than Ti/RuO_(2)-IrO_(2)and graphite systems.The increased removals of TP and metals were ascribed to the in situ coagulation of Al(OH)_(3),hydroxide precipitation,and electrodeposition.With the reduced scaling on the Al cathode surface,the formation of Al^(3+)and electrified Al(OH)_(3)lessened the requirement for cathode cleaning and increased the bulk conductivity,resulting in increased instantaneous current production(38.9%)and operating cost efficiencies(48.3 kWh kg_(COD)^(−1)).The present study indicated that the in situ CO-EO process could be potentially used for treating persistent wastewater containing high levels of organic and inorganic ions.
文摘From Nov. 1990 to Dec. 1993, 128 patients with histologically diagnosed cervical intraepithelial neoplasia (CIN) grade 1 or 2, were randomized treated with the follow-
文摘A patient treated with a vitamin K antagonist (VKA) since the implantation of two mechanical heart valves developed acute anemia after the extraction of a tooth. This case report and data in the literature indicate a need for specific measures before, during, and after oral surgery in patients taking anticoagulant therapy: 1) the bleeding risk should be evaluated before the procedure. The INR should be measured routinely, 2) the procedure should be scheduled early in the week to allow an evaluation at the fibrinolysis peak, i.e., 48 to 72 hours after surgery, which is the time of greatest risk of delayed bleeding, 3) the surgical procedure should be appropriate for the elevated bleeding risk, 4) postoperative monitoring is of the most importance, as bleeding is usually delayed in patients on VKA therapy, 5) when poor treatment adherence is expected, day-hospital admission is useful to ensure that the postoperative protocol is implemented properly and to detect early bleeding. The treatment of post-extraction acute anemia includes local hemostasis protocol with the revision of the socket followed by red-blood-cell pack transfusion. A daily fluindione dosage control, and a normal hemoglobin level will allow the patient to leave the hospital.
