The degradation of phenol by pulsed discharge plasma above a liquid surface(APDP) and under a liquid surface(UPDP) was compared.The effects of discharge voltage,discharge distance,initial solution conductivity and ini...The degradation of phenol by pulsed discharge plasma above a liquid surface(APDP) and under a liquid surface(UPDP) was compared.The effects of discharge voltage,discharge distance,initial solution conductivity and initial p H on the removal of phenol were studied.It was concluded that the removal of phenol increases with increasing discharge voltage and with decreasing discharge distance in both APDP and UPDP systems.An increase in the initial solution’s conductivity has a positive effect in the APDP system but a negative effect in the UPDP system.In addition,alkaline conditions are conducive to the degradation of phenol in the APDP system,while acidic conditions are conducive in the UPDP system.Free radical quenching experiments revealed that ·O-2has an important influence on the degradation of phenol in the APDP system,while ·OH plays a key role in the UPDP system.This paper verifies the differences in the two discharge methods in terms of phenol removal.展开更多
高危型人乳头瘤病毒(high-risk human papilloma virus,hrHPV)持续感染是宫颈癌及癌前病变发生的必要因素,是宫颈癌发生最为关键的环节^([1])。持续性hrHPV感染被大部分研究定义为至少2个时间节点检测到hrHPV阳性,另一部分研究则定义为...高危型人乳头瘤病毒(high-risk human papilloma virus,hrHPV)持续感染是宫颈癌及癌前病变发生的必要因素,是宫颈癌发生最为关键的环节^([1])。持续性hrHPV感染被大部分研究定义为至少2个时间节点检测到hrHPV阳性,另一部分研究则定义为相邻2次hrHPV检测阳性结果的时间间隔中位数为6个月^([2])。大部分hrHPV感染在一定时间内可由人体自身免疫力抑制或清除。展开更多
基金the financial support from National Natural Science Foundation of China (No. 51707093)。
文摘The degradation of phenol by pulsed discharge plasma above a liquid surface(APDP) and under a liquid surface(UPDP) was compared.The effects of discharge voltage,discharge distance,initial solution conductivity and initial p H on the removal of phenol were studied.It was concluded that the removal of phenol increases with increasing discharge voltage and with decreasing discharge distance in both APDP and UPDP systems.An increase in the initial solution’s conductivity has a positive effect in the APDP system but a negative effect in the UPDP system.In addition,alkaline conditions are conducive to the degradation of phenol in the APDP system,while acidic conditions are conducive in the UPDP system.Free radical quenching experiments revealed that ·O-2has an important influence on the degradation of phenol in the APDP system,while ·OH plays a key role in the UPDP system.This paper verifies the differences in the two discharge methods in terms of phenol removal.
文摘高危型人乳头瘤病毒(high-risk human papilloma virus,hrHPV)持续感染是宫颈癌及癌前病变发生的必要因素,是宫颈癌发生最为关键的环节^([1])。持续性hrHPV感染被大部分研究定义为至少2个时间节点检测到hrHPV阳性,另一部分研究则定义为相邻2次hrHPV检测阳性结果的时间间隔中位数为6个月^([2])。大部分hrHPV感染在一定时间内可由人体自身免疫力抑制或清除。
