A novel technology using Fe powder as reducing agent for Ge and Cu recovery from precipitating vitriol supernatant in Zn hydrometallurgical plant was investigated. The results show that reaction time, temperature, agi...A novel technology using Fe powder as reducing agent for Ge and Cu recovery from precipitating vitriol supernatant in Zn hydrometallurgical plant was investigated. The results show that reaction time, temperature, agitation speed, initial pH value of solution and the amount of reducing Fe have significant effects on recovering Ge and Cu, and the optimum process operating parameters are established as follows： time 120 min, initial pH value 1.5, the dosage of reducing Fe powder 4 g/L, agitation speed 600 r/min and temperature 80 °C. Under these experimental conditions, the recovery ratios of Ge and Cu from precipitating vitriol supernatant in Zn hydrometallurgical plant can reach 96% and 100%, respectively. The content of Ge in the reduced residue reaches up to 2.06% （mass fraction）, indicating that the separation and enrichment of Ge from the Zn sulfate solution is realized. The grade of Ge and Cu can reach up to 4.88% and 56.75%, respectively, when the reduced residue is further processed.展开更多
目的:观察葛菊醒神方对急性酒精性肝损伤小鼠的保护作用。方法:将健康SPF级昆明小鼠60只,顺应性喂养3 d,随机分为空白组,模型组,阳性药物对照组,葛菊醒神方高、中、低剂量组,每组10只。除空白组外,其他组小鼠灌胃50%乙醇(20 m L/kg),灌...目的:观察葛菊醒神方对急性酒精性肝损伤小鼠的保护作用。方法:将健康SPF级昆明小鼠60只,顺应性喂养3 d,随机分为空白组,模型组,阳性药物对照组,葛菊醒神方高、中、低剂量组,每组10只。除空白组外,其他组小鼠灌胃50%乙醇(20 m L/kg),灌胃乙醇0.5 h后,灌服相应计量药物。观察用药后小鼠嗜睡时间、血清中ALT、AST水平和肝组织形态学改变。结果:与模型组比较,葛菊醒神方缩短酒精性肝损伤小鼠模型嗜睡时间(P<0.01);降低了血清中谷丙转氨酶(AST)和谷草转氨酶(ALT)的活性(P<0.01);病理组织学显示,葛菊醒神方可减轻肝脏脂肪变性,使肝细胞坏死面积减小。结论:葛菊醒神方能明显改善乙醇致酒精性肝损伤。展开更多
基金Project(2011TT2057)supported by Science&Technology Department of Hunan Province,China
文摘A novel technology using Fe powder as reducing agent for Ge and Cu recovery from precipitating vitriol supernatant in Zn hydrometallurgical plant was investigated. The results show that reaction time, temperature, agitation speed, initial pH value of solution and the amount of reducing Fe have significant effects on recovering Ge and Cu, and the optimum process operating parameters are established as follows： time 120 min, initial pH value 1.5, the dosage of reducing Fe powder 4 g/L, agitation speed 600 r/min and temperature 80 °C. Under these experimental conditions, the recovery ratios of Ge and Cu from precipitating vitriol supernatant in Zn hydrometallurgical plant can reach 96% and 100%, respectively. The content of Ge in the reduced residue reaches up to 2.06% （mass fraction）, indicating that the separation and enrichment of Ge from the Zn sulfate solution is realized. The grade of Ge and Cu can reach up to 4.88% and 56.75%, respectively, when the reduced residue is further processed.
文摘目的:观察葛菊醒神方对急性酒精性肝损伤小鼠的保护作用。方法:将健康SPF级昆明小鼠60只,顺应性喂养3 d,随机分为空白组,模型组,阳性药物对照组,葛菊醒神方高、中、低剂量组,每组10只。除空白组外,其他组小鼠灌胃50%乙醇(20 m L/kg),灌胃乙醇0.5 h后,灌服相应计量药物。观察用药后小鼠嗜睡时间、血清中ALT、AST水平和肝组织形态学改变。结果:与模型组比较,葛菊醒神方缩短酒精性肝损伤小鼠模型嗜睡时间(P<0.01);降低了血清中谷丙转氨酶(AST)和谷草转氨酶(ALT)的活性(P<0.01);病理组织学显示,葛菊醒神方可减轻肝脏脂肪变性,使肝细胞坏死面积减小。结论:葛菊醒神方能明显改善乙醇致酒精性肝损伤。
