期刊文献+
共找到6篇文章
< 1 >
每页显示 20 50 100
铁炭双极还原法处理1,4-二氯苯废水 被引量:1
1
作者 许德才 刘开成 +1 位作者 杨骥 贾金平 《环境化学》 CAS CSCD 北大核心 2008年第1期114-116,共3页
使用双极还原法对1,4-二氯苯(1,4-DCB)工业废水进行处理,结果表明,阴极的1,4-DCB去除效率大于阳极的去除效率.在反应的前10min去除了50%以上的1,4-DCB,随进水浓度增大,去除效率变低.在酸性条件下,电极的去除效率明显提高,1,4-DCB去除效... 使用双极还原法对1,4-二氯苯(1,4-DCB)工业废水进行处理,结果表明,阴极的1,4-DCB去除效率大于阳极的去除效率.在反应的前10min去除了50%以上的1,4-DCB,随进水浓度增大,去除效率变低.在酸性条件下,电极的去除效率明显提高,1,4-DCB去除效率可达90%以上. 展开更多
关键词 铁炭双极还原法 1 4-二氯苯 废水 处理方法
下载PDF
Kinetics Research on In-situ Rapid Dechlorination of 1,4-dichlorobenzene by Microwave-assisted Raney Ni-Al Alloy Catalyst
2
作者 Zhiming Chen Zhaoyu Mo +2 位作者 Baoying Lv Hong Xie Li Tang 《Meteorological and Environmental Research》 CAS 2013年第9期39-42,46,共5页
[Objective]The research aimed to study rapid dechlodnation kinetics of 1,4-dichlorobenzene (1,4-DCB) by microwave-assisted Raney Ni -AI alloy catalyst. [ Method] Microwave-assisted Raney Ni -AI alloy catalyst was us... [Objective]The research aimed to study rapid dechlodnation kinetics of 1,4-dichlorobenzene (1,4-DCB) by microwave-assisted Raney Ni -AI alloy catalyst. [ Method] Microwave-assisted Raney Ni -AI alloy catalyst was used for dechlorination of chlorobenzene (CB) and 1,4-DCB to analyze dechlorination kinetics of 1,4-DCB. [ Result] Reductive dechlorination reaction of 1,4-DCB by microwave-assisted Raney Ni- AI alloy catalyst was in accordance of the two-order reaction kinetics. Reaction rate constants of 1,4-DCB dechlorination at 35 and 50 ℃ were 0.037 6 and 0.151 mol/( L . min), and the activation energy was 76.66 kJ/mol. By microwave-assisted Raney Ni - AI alloy catalyst, dechlorination rate of 1,4- DCB reached 90% at 10 rain and 35 ℃. Moreover, two chlorine atoms were removed simultaneously, reaching the target of efficient dechlorination. [ Condusion] Oechlodnation of polychlodnated organic compounds by microwave-assisted Raney Ni- AI alloy catalyst obtained good effect . 展开更多
关键词 Microwave-assisted Raney Ni -AI alloy catalyst 1 4-dcb Dechlodnation KINETICS China
下载PDF
Levels of polychlorinated biphenyls in 1,4-dichlorobenzene mothballs 被引量:1
3
作者 LIUWen-bin ZHENGMing-hui XINGYing WANGDong-sheng ZHAOXing-ru GAOLi-rong 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2005年第1期113-114,共2页
Although polychlorinated biphenyls(PCBs) are globally recognized pollutant, an understanding of their resources as by products in chemical industry is poorly investigated. This paper presents data from a study that wa... Although polychlorinated biphenyls(PCBs) are globally recognized pollutant, an understanding of their resources as by products in chemical industry is poorly investigated. This paper presents data from a study that was conducted in order to determine the extent of PCBs in 1,4 dichlorobenzene( p DCB) mothballs. Total PCBs and dioxin like PCBs were detected in five mothball samples. Total PCB concentrations ranged from 328 ng/g to 1798 ng/g, while the levels of WHO TEQ were between 0 16 pg/g and 13 pg/g. Mean concentrations of total PCBs and WHO TEQ in the samples were 724 ng/g and 3.2 pg/g, respectively. The highest level of PCB congeners was that of trichlorinated biphenyls(537 ng/g), which maybe due to the relatively low chlorination in the process of p DCB production. A mechanism of the formation of PCBs from polychlorinated benzene in the presence of chlorine is also suggested. The results suggested that re estimation on the risk of p DCB products, especially the products for daily use such as mothballs, is expected. 展开更多
关键词 mothball p-dcb 1 4-DICHLOROBENZENE polychlorinated biphenyls(PCBs)
下载PDF
P-DCB和Cd2+联合污染对草鱼肝胰脏和肾脏SOD和POD酶活的影响 被引量:1
4
作者 王桂燕 吴沁霏 +4 位作者 张平 倪倩 张驰 迟艳玲 肖月 《沈阳大学学报(自然科学版)》 CAS 2019年第5期383-387,共5页
研究了对二氯苯(P-DCB)和重金属镉(Cd^2+)联合胁迫对草鱼的肝胰脏和肾脏组织超氧化物歧化酶(SOD)和过氧化物酶(POD)产生的影响.结果显示:在P-DCB和Cd^2+复合污染下草鱼肝胰脏和肾脏SOD酶活随着胁迫时间延长呈现“降—升—降”的趋势;草... 研究了对二氯苯(P-DCB)和重金属镉(Cd^2+)联合胁迫对草鱼的肝胰脏和肾脏组织超氧化物歧化酶(SOD)和过氧化物酶(POD)产生的影响.结果显示:在P-DCB和Cd^2+复合污染下草鱼肝胰脏和肾脏SOD酶活随着胁迫时间延长呈现“降—升—降”的趋势;草鱼肝胰脏POD随着时间延长也呈现“降—升—降”的趋势;肾脏组织的POD在P-DCB和Cd^2+复合污染下,总体也是呈现“降—升—降”的趋势. 展开更多
关键词 对二氯苯(P-dcb) 镉(Cd^2+) 草鱼 超氧化物歧化酶(SOD) 过氧化物酶(POD)
下载PDF
四氯乙烯和对二氯苯对草鱼的联合毒性 被引量:11
5
作者 王桂燕 周启星 +2 位作者 胡筱敏 王国清 李锋 《中国环境科学》 EI CAS CSCD 北大核心 2007年第3期387-390,共4页
采用水生污染暴露试验和水生毒理联合效应相加指数法,研究了四氯乙烯(PCE)和对二氯苯(P-DCB)对草鱼(Ctenopharyngodon idellus)的单一毒性与联合毒性.结果表明,PCE和P-DCB的单一毒性均为高毒,且P-DCB的毒性大于PCE.PCE和P-DCB对草鱼的... 采用水生污染暴露试验和水生毒理联合效应相加指数法,研究了四氯乙烯(PCE)和对二氯苯(P-DCB)对草鱼(Ctenopharyngodon idellus)的单一毒性与联合毒性.结果表明,PCE和P-DCB的单一毒性均为高毒,且P-DCB的毒性大于PCE.PCE和P-DCB对草鱼的联合染毒在浓度1:1时,暴露时间为24,48,72,96h的相加指数(AI)分别为0.26,0.37,0.78,0.98,联合毒性为相加作用.PCE与P-DCB对草鱼的联合染毒在毒性1:1时,暴露时间为24,48,72,96h的AI分别为-0.15,0.24,0.83,1.30,联合毒性主要是相加作用,但是随着染毒时间的延长,联合毒性由相加作用向协同作用转变. 展开更多
关键词 草鱼(Ctenopharyngodon idellus) 四氯乙烯(PCE) 对二氯苯(P-dcb) 联合毒性 相加作用 协同作用
下载PDF
对二氯苯、四氯乙烯和镉联合污染对草鱼的毒性效应研究 被引量:2
6
作者 刘晓宛 张平 +1 位作者 龚霞 王桂燕 《环境科学与技术》 CAS CSCD 北大核心 2020年第1期217-221,共5页
文章采用水生污染暴露试验和Marking相加指数评价法,研究了对二氯苯(P-DCB)、四氯乙烯(PCE)和重金属镉(Cd2+)对草鱼的联合毒性。结果表明:单一P-DCB、PCE和Cd2+污染对草鱼的24、48、72和96 h的半数致死质量浓度依次是10.11、9.04、8.52... 文章采用水生污染暴露试验和Marking相加指数评价法,研究了对二氯苯(P-DCB)、四氯乙烯(PCE)和重金属镉(Cd2+)对草鱼的联合毒性。结果表明:单一P-DCB、PCE和Cd2+污染对草鱼的24、48、72和96 h的半数致死质量浓度依次是10.11、9.04、8.52、7.97,46.13、41.58、36.51、34.56和45.58、34.81、28.63、24.05 mg/L;由此可见,它们的单一毒性均为高毒,并且其毒性顺序为P-DCB>Cd2+>PCE。P-DCB、PCE和Cd2+对草鱼的联合毒性,在浓度1∶1时,表现出暴露时间为24、48、72和96 h的相加指数分别为-0.75、-0.46、-0.32和0.11,联合作用结果为先拮抗作用,随着时间的增加,拮抗作用减弱,最后转为毒性剧增的协同效应。而在毒性1∶1时,表现出暴露时间为24、48、72和96 h的AI分别为-0.41、-0.37、-0.17和-0.14,所以联合作用结果是为拮抗作用,随着时间的增加,拮抗作用减弱。 展开更多
关键词 草鱼 对二氯苯(P-dcb) 四氯乙烯 镉(Cd2+) 联合毒性
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部