检索结果-南通市图书馆

Adsorption of Fluoride in Aqueous Solution on Synthetic Siderite

在线全文

cnki会议

学校读者我要写书评

暂无评论

地学前缘 2009年第S1期16卷 176-176页

作者： Qiong Liu,Huaming Guo school of Water Resources environment,china university of Geosciences(beijing),beijing 100083,china.

The present article bears in itself the investigation of the authors on the ways of treating high-fluoride containing groundwater by using synthetic siderite. Effects of various physico-chemical parameters such as contact time,initial F^-concentration,temperature and pH of solution,absorbent dose,and coexistence anions on F^-adsorption were studied in terms of batch *** was found that,as contact time increased。

关键词： siderite high fluoride water fluoride removal

维普期刊数据库

Photocatalytic degradation kinetics and mechanism of pentachlorophenol based on superoxide radicals

在线全文

学校读者我要写书评

暂无评论

Journal of environmental Sciences 2011年第11期23卷 1911-1918页

作者： Yang Li,Junfeng Niu,Lifeng Yin,Wenlong Wang,Yueping Bao,Jing Chen,Yanpei Duan State Key Laboratory of Water environment Simulation,school of environment,beijing Normal university,beijing 100875,china State Key Laboratory of Water environment Simulation School of Environment Beijing Normal University Beijing 100875 China

The micron grade multi-metal oxide bismuth silicate (Bi 12 SiO 20,BSO) was prepared by the chemical solution decomposition *** degradation of pentachlorophenol (PCP) was investigated in the presence of BSO under xenon lamp *** reaction kinetics followed pseudo first-order and the degradation ratio achieved 99.1% after 120 min at an initial PCP concentration of 2.0 mg/*** pH decreased from 6.2 to 4.6 and the dechlorination ratio was 68.4% after 120 min at an initial PCP concentration of 8.0 mg/*** results of electron spin resonance showed that superoxide radical (O 2 · ) was largely responsible for the photocatalytic degradation of ***,this result was different from that of previous photocatalytic reactions where valence band holes or hydroxyl radicals played the role of major *** aromatic compounds and aliphatic carboxylic acids were determined by GC/MS as the reaction intermediates,which indicated that O 2 · can attack the bond between the carbon and chlorine atoms to form less chlorinated aromatic *** aromatic compounds were further oxidized by O 2 · to generate aliphatic carboxylic acids which can be finally mineralized to CO 2 and H 2 O.

关键词： photocatalytic degradation pentachlorophenol bismuth silicate superoxide radicals reaction mechanisms

Treatment of Cr（VI） contaminated groundwater by PRB simulation with ash and iron

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Treatment of Cr（VI） contaminated groundwater by PRB simula...

2010 International Conference on Nuclear Energy and engineering technology (NEET 2010)

作者： Wei Zhang school of Energy and environment engineering Hebei university of technology Tianjin china Huasheng Wang Faculty of Architectural and Mapping engineering Jiangxi university of Science and technology Ganzhou Jiangxi Province china Feng Ding College Of Geoscience and Surveying engineering china university of mining & technology

The simulating PRB was filled with iron and fly ash, the ratio of two materials was 1:1. The groundwater contaminated by Cr （VI） was conducted by dynamic simulating test. The experiment showed that the pH was changing in the flowing water treated with simulating PRB and the water volume changes with the processing of experiment, also showed the removal ratio of Cr （VI）. The testing results show when the pH of flowing water is 7-8,the effect of treated water is well. And, with the experiment is going on, the water volume is steady in a time, the removal ratio of Cr （VI） has close relationship with pH in flowing water treated by simulating PRB. As a result of Statistical data, there are great relationships between three factors which are pH in flowing water treated by simulating PRB, water volume treated by simulating PRB and the removal ratio of Cr （VI）. The experiment show that PRB technology can be designed on site in right place to treat the Cr（VI） contaminated groundwater as soon as the media of PRB can be changed in time, and control the pH、the ratio of the media.

关键词： iron and ash contamination of groundwater Cr(VI) PRB

不同水煤浆分散剂与煤之间的相互作用规律研究 Ⅴ.煤在分散剂水溶液中的溶出离子及其对CWS性质的影响

在线全文

cnki会议

学校读者我要写书评

暂无评论

燃料化学学报 2004年第4期32卷 400-406页

作者：邹立壮朱书全王晓玲中国矿业大学北京化学与环境工程学院北京100083

通过原子吸收和等离子体原子发射光谱法,研究了6种不同分散剂对14种煤溶出Ca2+、Mg2+、Fe3+(Fe2+)、Al3+、SiO2-3离子的影响。结果表明,煤中溶出高价离子的数量,主要取决于分散剂与高价离子间的相互作用特征,以及矿物质的种类和数量。... 详细信息

通过原子吸收和等离子体原子发射光谱法,研究了6种不同分散剂对14种煤溶出Ca2+、Mg2+、Fe3+(Fe2+)、Al3+、SiO2-3离子的影响。结果表明,煤中溶出高价离子的数量,主要取决于分散剂与高价离子间的相互作用特征,以及矿物质的种类和数量。煤在不同分散剂水溶液中溶出高价离子的多少,并不单纯与水煤浆(CWS)的流变性或煤的成浆性具有相关性。煤中矿物质对CWS性质的影响,是多种因素综合作用的结果,溶出离子的种类和数量只是其中的重要因素之一。

关键词：煤矿物质分散剂水煤浆溶出离子

维普期刊数据库

Leaching Mineral Elements from Chinese Maifan-stone

在线全文

学校读者我要写书评

暂无评论

Leaching Mineral Elements from Chinese Maifan-stone

2008 china International Powder technology & Application Forum

作者： Xiaohua LIU~(1 2 a) Jianxia FU~(3 b) Li LI~(2 c) Xingdong LV~(4 d) Peng PENG~(5 e) Guosheng GAI~(1 f) 1.Department of Materials Science and engineering Tsinghua university beijing 100084 china 2.College of Materials and engineering Inner Mongolia university of technology Hohhot 010062 china 3.school of chemical and environmental engineering china university of mining and technology beijing 100083 china 4.Functional Material Academy of Jiangxi university of Finance and Economy Nanchang 330013 china 5.engineering Command Institute of chemical Defence beijing 102205 china

＜正＞Chinese maifan-stone （CMS） is Chinese traditional mineral medicine,in which there are lots of soluble mineral *** this paper static soaping to leach mineral elements and dry or wet gringding maifan-stone simultaneously leaching mineral elements was *** result shows that:much more mineral elements were leached from Maifan-stone by the method that wet vibrating mill than by the method that soaking fine Maifan-stone after *** the factors influencing on the mineral concentration such as milling time and solid/liquid mass ratio were ***,the possibility of wet-milling simultaneously to leaching mineral elements from Maifan-stone to industrialization was analyzed,and pointed out that it has good industrialization foreground.

关键词： Maifan-stone Wet-milling Mineral elements Mineral medicine Leaching

在线全文

cnki会议

学校读者我要写书评

暂无评论

受施工扰动影响土体环境稳定理论与变形控制

同济大学学报（自然科学版） 2004年第10期32卷 1261-1269页

作者：孙钧周健龚晓南张弥同济大学地下建筑与工程系上海200092 浙江大学建筑工程学院浙江杭州310027 北京交通大学土木建筑工程学院北京100044

讨论了城市市区进行的各种工程活动中 ,因施工扰动引起的环境土工损伤问题及其施工变形的智能预测与控制方法 .分别对土体受施工扰动的诸因素 ,如 :对土体力学性态、开挖卸载条件下土体应力路径、土体孔隙比和含水量的变化 ,以及土体结... 详细信息

讨论了城市市区进行的各种工程活动中 ,因施工扰动引起的环境土工损伤问题及其施工变形的智能预测与控制方法 .分别对土体受施工扰动的诸因素 ,如 :对土体力学性态、开挖卸载条件下土体应力路径、土体孔隙比和含水量的变化 ,以及土体结构的破坏、土体化学组成的改变、土体成分的混合与分离和土体固结状态的变化等 ,均作了系统研究 .进而据此从理论上和实验室测试 2方面探讨了就软土工程性质的上述变化对施工过程中土体强度、变形、稳定性和承载力的影响 .另一方面 ,首次将人工智能和自动控制等软科学理论与技术引入岩土工程领域 ,采用了一种称之为“多步滚动预测”的人工神经网络模型于盾构隧道施工中地面沉降的预测和预报 ,还应用了模糊逻辑控制方法对工程施工变形位移实现了实时。

关键词：土体施工扰动环境土工稳定施工变形预测与控制智能方法

维普期刊数据库

A Time Based Markov Model for Automatic Position-Dependent Services in Smart Home

在线全文

学校读者我要写书评

暂无评论

A Time Based Markov Model for Automatic Position-Dependent S...

2010 Chinese Control and Decision Conference

作者： Yi Yang~1,Zhiliang Wang~1,Qiong Zhang~1,Yang Yang~(1,2) 1.school of Information engineering,university of Science and technology beijing,beijing,100083,china 2.College of Information engineering,North china university of technology beijing,100144,china

＜正＞A smart home is likely in the near *** important ingredient in an intelligent environment such as a home is automatic services,which means home system itself could know or predict what the inhabitant want to do,and so provide inhabitant the services *** researches reveal that most of the services in smart home are location-dependent so the automatic services must be built on the location *** this paper we model inhabitant location pattern as a time based markov model（TMM）.The simulation result shows that compared to the other models, the TMM has a set of benefits such as less time complexity,higher prediction accuracy and faster convergences rate. These benefits make TMM meets the requirements of automatic services in smart home.

关键词： Markov Model Location Awareness Automatic Service Smart Home

Research and Design of Coal Preparation Plant Inspection Robot

在线全文

cnki会议

学校读者我要写书评

暂无评论

Research and Design of Coal Preparation Plant Inspection Rob...

2011 Chinese Control and Decision Conference（CCDC）

作者： Guang Yan is with Yanzhou mining Group,Zoucheng,Shan Dong 273500 china.Jun Wang is with the school of Information and Electrical engineering,china university of mining and technology,Xuzhou 221008 china.Meiqiang Zhu is with the school of Information and Electrical engineering,china university of mining and technology,Xuzhou 221008 china.Haibin Ji is with the school of Information and Electrical engineering,china university of mining and technology,Xuzhou 221008 china

In this paper we describe the necessity and significance of coal preparation plant inspection robot,propose the robot design requirements and design the system framework of hardware and *** we use RecurDyn software to simulate and analysis the stability and fitness of the inspection robot in coal preparation plant complex environment based on virtual prototype technique.

关键词： Coal Preparation Plant Inspection Robot Virtual Prototype Technique RecurDyn

Brown Coal Drying Processes-A Review

在线全文

cnki会议

学校读者我要写书评

暂无评论

Brown Coal Drying Processes-A Review

2011 International Conference on Materials for Renewable Energy & environment(ICMREE 2011)

作者： YANG Xuliang ZHAO Yuemin LUO Zhenfu CHEN Zengqiang DUAN Chenlong SONG Shulei school of chemical engineering and technology china university of mining and technology Xuzhou china

Brown coals become increasingly important in energy consumption with the deposits of other energy resources decreasing every *** direct utilization of moist brown coals without drying brings many problems such as low combustion efficiency,high greenhouse gas emissions,and it is not acceptable for coal gasification or ***-drying brown coal is necessary and *** drying processes,mainly classified into evaporative and non-evaporative drying,are summarized in this paper,introducing the principles and analyzing the advantages and disadvantages.

关键词： brown coal drying evaporative drying non-evaporative drying