Oxygen

Oxygen的意思是指氧,主要通过分馏液态空气获得,用于炼钢、焊接和维持生命。

实验室少量制法为电解水,或是在二氧化锰(MnO2)作催化剂的条件下加热氯酸钾(KClO3)。

元素符号: O 英文名: Oxygen 中文名: 氧

相对原子质量: 15.9994 常见化合价: -2,-1 电负性: 3.5

外围电子排布: 2s2 2p4 核外电子排布: 2,6

同位素及放射线: O-15[122.2s] *O-16 O-17 O-18

电子亲合和能: 141.5 KJ·mol-1

第一电离能: 1314 KJ·mol-1 第二电离能: 3388 KJ·mol-1 第三电离能: 5300 KJ·mol-1

单质密度: 0.001429 g/cm3 单质熔点: -218.4 ℃ 单质沸点: -183.0 ℃

原子半径: 0.65 埃 离子半径: 1.32(-2) 埃 共价半径: 0.73 埃

常见化合物: H2O CO2 H2O2各种氧化物

发现人: 舍勒、普利斯特里、拉瓦锡 时间: 1774 地点: 英格兰/瑞典

名称由来:

希腊文:oxys和genes(形成酸的元素)。

元素描述:

无色无臭无味的气体,冷凝为淡蓝色液体。在宇宙中含量第三,是地壳中含量最丰富的元素,形成了大气的21%。

元素来源:

主要通过分馏液态空气获得。实验室少量制法为电解水,或是在二氧化锰(MnO2)作催化剂的条件下加热氯酸钾(KClO3)。

元素用途:

用于炼钢、焊接和维持生命。大气上层的天然臭氧层为地球阻挡了紫外线辐射。

Oxygen造价信息

市场价 信息价 询价
材料名称 规格/型号 市场价
(除税)
工程建议价
(除税)
行情 品牌 单位 税率 供应商 报价日期
安洁氧漂剂 Liquid oxygen bleach 浓缩洗衣氧漂液/60LTD 查看价格 查看价格

Weiss

13% 重庆卡姆商贸有限公司
压力表 MAT5DX(M20x1.5)0B24(oxygen) 查看价格 查看价格

瑞士堡盟

13% 长沙市科润自动化设备有限公司
压力表 MAT2DX(M14x1.5)0B24(oxygen) 查看价格 查看价格

瑞士堡盟

13% 长沙市科润自动化设备有限公司
材料名称 规格/型号 除税
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材料名称 规格/需求量 报价数 最新报价
(元)
供应商 报价地区 最新报价时间
暂无数据

Oxygen常见问题

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Oxygen文献

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炉外精炼精炼工艺

LF(Ladle Furnace process); AOD(Argon-oxygen decaburizition process );

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喷粉( powder injection )。

Preface

Chapter 1.Streams and Rivers

1 General

2 Point Source Dilution

3 Discharge Measurement

4 Time of Travel

5 Dissolved Oxygen and Water Temperature

6 Biochemical Oxygen Demand Analysis

7 Streeter—Phelps Oxygen Sag Formula

8 BOD Models and Ki Computation

9 Determination of Reaeration Rate Constant K2

10 Sediment Oxygen Demand

11 Organic Sludge Deposits

12 Photosynthesis and Respiration

13 Natural Self—Purification in Streams

14 SOD of DO Usage

15 Apportionment of Stream Users

16 Velz Reaeration Curve (a Pragmatic Approach)

17 Stream DO Model (a Pragmatic Approach)

18 Bioloaical Factors

References

Chapter 2.Lakes and Reservoirs

1 Lakes and Impoundment Impairments

2 Lake Morphometry

3 Water Quality Models

4 Evaporation

5 The Clean Lakes Program

References

Chapter 3.Groundwater

1 Definition

2 Hydrogeologic Parameters

3 Steady Flows in Aquifers

4 Anisotropic Aquifers

5 Unsteady (Nonequilibrium) Flows

6 Groundwater Contamination

7 Setback Zones

References

Chapter 4.Fundamental and Treatment Plant Hydraulics

1 Definitions and Fluid Properties

2 Water Flow in Pipes

3 Pumps

4 Water Flow in Open Channels

5 Flow Measurements

References2100433B

Preface

上册

Chapter 1.Streams and Rivers

1 General

2 Point Source Dilution

3 Discharge Measurement

4 Time of Travel

5 Dissolved Oxygen and Water Temperature

6 Biochemical Oxygen Demand Analysis

7 Streeter—Phelps Oxygen Sag Formula

8 BOD Models and Ki Computation

9 Determination of Reaeration Rate ConstantK2

10 Sediment Oxygen Demand

11 Organic Sludge Deposits

12 Photosynthesis and Respiration

13 Natural Self—Purification in Streams

14 SOD of DO Usage

15 Apportionment of Stream Users

16 Velz Reaeration Curve (a Pragmatic Approach)

17 Stream DO Model (a Pragmatic Approach)

18 Bioloaical Factors

References

Chapter 2.Lakes and Reservoirs

1 Lakes and Impoundment Impairments

2LakeMorphometry

3 Water Quality Models

4 Evaporation

5 The Clean Lakes Program

References

Chapter 3.Groundwater

1 Definition

2 Hydrogeologic Parameters

3 Steady Flows in Aquifers

4 Anisotropic Aquifers

5 Unsteady (Nonequilibrium) Flows

6 Groundwater Contamination

7 Setback Zones

References

Chapter 4.Fundamental and Treatment Plant Hydraulics

1 Definitions and Fluid Properties

2 Water Flow in Pipes

3 Pumps

4 Water Flow in Open Channels

5 Flow Measurements

References

中册

Chapter 5.Public Water Supply

1 Sources and Quantity of Water

2 Population Estimates

3 Water Requirements

4 Regulations for Water Quality

5 Water Treatment Processes

6 Aeration and Air Stripping

7 Solubility Equilibrium

8 Coagulation

9 Flocculation

10 Sedimentation

11 Granular Media Filtration

12 Membrane Processes

13 Water Softening

14 Ion Exchange

15 Iron and Manganese Removal

16 Activated Carbon Adsorption

17 Residualfrom Water Plant

18 Disinfection

19 Water Fluoridatinn

References

下册

Chapter 6.Wastewater Engineering

1 What Is Wastewater?

2 Characteristics of Wastewater

3 Sewer Systems

4 Quantity of Wastewater

5 Urban Stormwater Management

6 Design of Storm Drainage Systems

7 Precipitation and Runoff

8 Stormwater Quality

9 Sewer Hydraulics

10 Sewer Appurtenances

11 Pumping Stations

12 Sewer Construction

13 Wastewater Treatment Systems

14 Screening Devices

15 Comminutors

16 Grit Chamber

17 Flow Equalization

18 Sedimentation

19 Primary Sedimentation Tanks

20 Biological (Secondary)Treatment Systems

21 Activated—Sludge Process

22 Trickling Filter

23 Rotating Biological Contactor

24 Dual BiologicaI Treatment

25 Stabilization Ponds

26 Secondary Clarifier

27 Effluent Disinfection

28 Advanced Wastewater Treatment

29 Sludge (Residuals) Treatment and Management

30 Wetlands

References

Appendix A.Illinois Environmental Protection Agency's Macroinvertebrate Tolerance List

Appendix B.Well Function for Confined Aquifers

Appendix C.Solubility Product Constants for Solution at or near Room Temperature

Appendix D.Freundlich Adsorption lsotherm Constants for Toxic Organic Compounds

Appendix E.Factors for Conversion

Index 2100433B

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