In response to the fact that the presence of manganese dithionate(MnS_(2)O_(6))leads to a series of adverse impacts,especially lower purity of manganese sulfate(MnSO_(4))and disruption of its recovery,advanced oxidati...In response to the fact that the presence of manganese dithionate(MnS_(2)O_(6))leads to a series of adverse impacts,especially lower purity of manganese sulfate(MnSO_(4))and disruption of its recovery,advanced oxidation methods such as ozonation system are used to manage MnS_(2)O_(6)in the leaching solution,replacing conventional methods.To ascertain the conversion rate and kinetics of MnS_(2)O_(6)during the ozonation process,we explored the factors influencing its removal rate,including ozone dosage,manganese dithionate concentration,sulfuric acid concentration,and reaction temperature.Batch experiments were conducted to determine the reaction rate constant of ozone(k)and activation energy(Ea)obtained from intermittent experimental data fitting,revealing a least-squares exponential conversion relationship between k and the MnS_(2)O_(6)removal amount,wherein an increase in the aforementioned factors led to an enhanced MnS_(2)O_(6)conversion rate,exceeding 99.3%.The formation mechanism of the ozone products proposed during the experiment was summarized and proposed as follows:1)Mn^(2+)was directly oxidized to MnO_(2),and 2)SO_(4)2−was obtained by the catalytic oxidation of S_(2)O_(6)^(2−)with HO•from O3 decomposition.According to the kinetics analysis,the pre-exponential factor and total activation energy of the ozonation kinetics equation were 1.0×10^(23) s^(−1) and 177.28 kJ/mol,respectively.Overall,the present study demonstrates that O_(3) as an oxidizing agent can effectively facilitate MnS_(2)O_(6)disproportionation while preventing the release of the secondary pollutant,SO_(2)gas.展开更多
目的探讨冠心病痰瘀互结证患者的舌象特点,分析其舌象变化的规律。方法采用整群抽样法,纳入2020年11月—2021年11月就诊于辽宁中医药大学附属医院心内科的冠心病稳定型心绞痛(也称劳力性心绞痛)210例患者的舌象临床资料,将纳入病例分为...目的探讨冠心病痰瘀互结证患者的舌象特点,分析其舌象变化的规律。方法采用整群抽样法,纳入2020年11月—2021年11月就诊于辽宁中医药大学附属医院心内科的冠心病稳定型心绞痛(也称劳力性心绞痛)210例患者的舌象临床资料,将纳入病例分为痰瘀互结证组与非痰瘀互结证组。按照世界卫生组织(World Health Organization,WHO)年龄分段标准将痰瘀互结证组分为中年组(27例)、低龄老年组(40例)、高龄老年组(17例)。对不同年龄组的痰瘀互结证患者HSV(Hue,Saturation,Value)、RGB(Red,Green,Blue)参数等舌象特征进行分析,探究与增龄相关的舌象变化规律。结果冠心病·痰瘀互结证患者不同年龄组间舌质、舌苔分布差异具有统计学意义。舌色特征:中年组多红舌,低龄老年组多淡紫舌,高龄老年组多绛舌和紫舌(P<0.05);中年组舌质尖部H值小于低龄老年组、高龄老年组(P<0.05),中年组舌质尖部V值大于其他两组(P<0.05)。高龄老年组舌质左部、右部、中部S值大于中年组和低龄老年组(P<0.05),V值小于中年组和低龄老年组(P<0.05),高龄老年组舌质左部、右部、中部的R+B/R+G+B值大于其他两组;舌形特征:中年组多胖大、齿痕舌,高龄老年组多瘦薄舌,且高龄老年组多裂纹舌、老舌、嫩舌(P<0.05);舌苔特征:中年组舌苔多白腻如豆腐脑铺舌,高龄老年组患者舌苔淡黄黏糊状如鸡子黄覆盖,腻苔比例逐渐减少,以高龄老年组腻苔比例最低(P<0.05)。中年组舌苔左部、右部、中部V值大于低龄老年组、高龄老年组(P<0.05),高龄老年组舌苔左部、右部、中部的S值大于中年组和低龄老年组(P<0.05),高龄老年组舌苔根部的V值小于其他两组(P<0.05),高龄老年组舌苔中部、根部的R+G/R+G+B值大于其他两组。结论(1)中年组易痰瘀热化。(2)伴随增龄瘀血程度逐渐加重。(3)高龄老年组痰瘀之邪易伤及营阴。(4)高龄老年组易虚实夹杂。展开更多
基金Project(2022M710619)supported by the Postdoctoral Science Foundation of ChinaProjects(2020YFH0213,2020YFG0039)supported by the Sichuan Science and Technology Program,China+1 种基金Projects(XJ2024001501,KCXTD2023-4)supported by the Basic Scientific Foundation and Innovation Team Funds of China West Normal UniversityProject(CSPC202403)supported by the Open Project Program of Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province,China。
文摘In response to the fact that the presence of manganese dithionate(MnS_(2)O_(6))leads to a series of adverse impacts,especially lower purity of manganese sulfate(MnSO_(4))and disruption of its recovery,advanced oxidation methods such as ozonation system are used to manage MnS_(2)O_(6)in the leaching solution,replacing conventional methods.To ascertain the conversion rate and kinetics of MnS_(2)O_(6)during the ozonation process,we explored the factors influencing its removal rate,including ozone dosage,manganese dithionate concentration,sulfuric acid concentration,and reaction temperature.Batch experiments were conducted to determine the reaction rate constant of ozone(k)and activation energy(Ea)obtained from intermittent experimental data fitting,revealing a least-squares exponential conversion relationship between k and the MnS_(2)O_(6)removal amount,wherein an increase in the aforementioned factors led to an enhanced MnS_(2)O_(6)conversion rate,exceeding 99.3%.The formation mechanism of the ozone products proposed during the experiment was summarized and proposed as follows:1)Mn^(2+)was directly oxidized to MnO_(2),and 2)SO_(4)2−was obtained by the catalytic oxidation of S_(2)O_(6)^(2−)with HO•from O3 decomposition.According to the kinetics analysis,the pre-exponential factor and total activation energy of the ozonation kinetics equation were 1.0×10^(23) s^(−1) and 177.28 kJ/mol,respectively.Overall,the present study demonstrates that O_(3) as an oxidizing agent can effectively facilitate MnS_(2)O_(6)disproportionation while preventing the release of the secondary pollutant,SO_(2)gas.
文摘目的探讨冠心病痰瘀互结证患者的舌象特点,分析其舌象变化的规律。方法采用整群抽样法,纳入2020年11月—2021年11月就诊于辽宁中医药大学附属医院心内科的冠心病稳定型心绞痛(也称劳力性心绞痛)210例患者的舌象临床资料,将纳入病例分为痰瘀互结证组与非痰瘀互结证组。按照世界卫生组织(World Health Organization,WHO)年龄分段标准将痰瘀互结证组分为中年组(27例)、低龄老年组(40例)、高龄老年组(17例)。对不同年龄组的痰瘀互结证患者HSV(Hue,Saturation,Value)、RGB(Red,Green,Blue)参数等舌象特征进行分析,探究与增龄相关的舌象变化规律。结果冠心病·痰瘀互结证患者不同年龄组间舌质、舌苔分布差异具有统计学意义。舌色特征:中年组多红舌,低龄老年组多淡紫舌,高龄老年组多绛舌和紫舌(P<0.05);中年组舌质尖部H值小于低龄老年组、高龄老年组(P<0.05),中年组舌质尖部V值大于其他两组(P<0.05)。高龄老年组舌质左部、右部、中部S值大于中年组和低龄老年组(P<0.05),V值小于中年组和低龄老年组(P<0.05),高龄老年组舌质左部、右部、中部的R+B/R+G+B值大于其他两组;舌形特征:中年组多胖大、齿痕舌,高龄老年组多瘦薄舌,且高龄老年组多裂纹舌、老舌、嫩舌(P<0.05);舌苔特征:中年组舌苔多白腻如豆腐脑铺舌,高龄老年组患者舌苔淡黄黏糊状如鸡子黄覆盖,腻苔比例逐渐减少,以高龄老年组腻苔比例最低(P<0.05)。中年组舌苔左部、右部、中部V值大于低龄老年组、高龄老年组(P<0.05),高龄老年组舌苔左部、右部、中部的S值大于中年组和低龄老年组(P<0.05),高龄老年组舌苔根部的V值小于其他两组(P<0.05),高龄老年组舌苔中部、根部的R+G/R+G+B值大于其他两组。结论(1)中年组易痰瘀热化。(2)伴随增龄瘀血程度逐渐加重。(3)高龄老年组痰瘀之邪易伤及营阴。(4)高龄老年组易虚实夹杂。
