Dissertation > Excellent graduate degree dissertation topics show

The Study of Recovery of Cd2+ by an Electrolytic Process from the Concentrated Solution of Micellar Enhanced Ultrafiltration

Author: LinDan
Tutor: ZengGuangMing；HuangZuoHui
School: Hunan University
Course: Environmental Engineering
Keywords: micellar enhanced ultrafiltration(MEUF) concentrated solution electrolysis Cd2+ recovery sodium dodecyl sulfate(SDS)
CLC: X703
Type: Master's thesis
Year: 2010
Downloads: 49
Quote: 0
Read: Download Dissertation

Abstract


The high toxicity of metal cadmium on human,plangts and animals can be extremely harmful. Wast waters containing dissolved cadmium come from many sources such as electroplating industries, nonferrous metals smelting,mine tailing. Micellar enhanced ultrafiltration(MEUF) is a new method which is based on the surfactant of the unique characteristic of parental molecular structure that can remove low concentration heavy metals in the water.It is a technology that combined the surface active agent with ultrafiltration. Compare with the traditional ultrafiltration, MEUF has many advantages.Such as lessen cost, and more effective removal of cadmium ions.Meanwhile,MEUF compared to the method of adsorption,distillation and extraction that has low energy consumtion and no intercsction.The most important is the treated water from MEUF can be directly recycled. But the concentrated solution by dealing with the MEUF contains high concenttation of heavy meatal ions and surface active agent,so it must be need to further processing for revovering heavy metals and recycling surface active agent.In this study, the electrolysis method was employed to recovery Cd2+ from the concentrated solution of MEUF..Effects of type of electrode, electrolysis voltage(U) and time(t),solution pH, surfactant to Cd2+ molar ratio ([SDS]/[Cd2+]) on Cd2+ reconery efficiency were investigated.And these five factors were optimized. The optimum experimental conditions were obtained:stainless steel(anode)- graphite(catho-de),U=2V,t=100min,pH=4,[SDS]/[Cd2+]=5.And the recovery efficiency of Cd2+ in the concentrated solution was 50.26%.This research also further studied the electrolyte of various substances on the process of electrolysis. The study found that the surfactant has some effect of resistance to electrolysis process. The same conditions in electrolysis, the recovery efficiency of Cd2+ was 50.26% that the solution containing SDS but 72.11% without SDS. Impact on the SDS in the electrolysis experiments,the experimental results showed that SDS concentration had a certain decrease under the action of electrolysis. But did not affect the SDS reuse. Added to the concentrated liquid electrolyte NaCl to enhance the recovery efficiency of Cd2+ experiments, the recovery efficiency of Cd2+ is 60.05% when the concentration of electrolyte NaCl is 0.3mol/L. The recovery efficiency of Cd2+ from 50.26% to 60.05% by adding electrolyte NaCl.

Related Dissertations

  1. Hydrogen Evolution Process of Water Electrolysis Assisted by TiO2 Nanotubes and TiO2/ZnO Nanorodes Assembled on Ni Substrate,TQ116.21
  2. Study on Treatment of Dye Direct Blue 12B by Combined Process Usingiron-carbon Micro-Electrolysis and Fenton Oxidation,X791
  3. Study on Treatment of Dye Wastewater by Combined Process Using Micro-Electrolysis and Fenton Oxidation of the Reaction Mechanism,X791
  4. Ti / RuO 2 -IrO 2 -SnO 2 -Sb 2 O 5 Preparation and Application of anode,X703
  5. Electrochemical anodic oxidation of sulfide,X703
  6. Study on Andvanced Treatment of Coking Wastewater by Iron-carbon Micro-electrolysis and Coagulation,X703
  7. Study on Treatment Technique of Improved Iron-carbon Micro-electrolysis Applied in Printing and Dyeing Wastewater,X703
  8. High purity nickel production process of vacuum distillation extraction,TF815
  9. The copper electrolyte gelatin regular studies of the molecular weight and its decomposition,TF811
  10. Gas-liquid Two-phase of Flow Study on the Impact of the Electrolysis Process on Rare Earth Electrolytic Cell.,TF845
  11. Simulation of Electric Field and Flow Field for the New 10KA Rare Earth Electrolysis Cell,TF845
  12. Corrosivity of the Second Brine in Chlor-Alkali Industry and Its Solution,TQ114
  13. Synthesis of Functional Ionic Liquids and Their Applications in High-performance Liquid Chromatography,O657.72
  14. Grid ground engineering applications,TM862
  15. Research on Treatment of Dyeing Wastewater by Micro-electrolysis,X703
  16. Iron-carbon micro- electrolysis catalytic oxidation - flocculation method to remove arsenic from copper smelter wastewater,X703
  17. Experimental Study on Treatment to Heavy Metals in Wastwater of Copper Metallurgy by Iron-Carbon Micro-Electrolysis Catalytic Deoxidization Method,X703
  18. Study on Technology of Treating Herbicide Wastewater,X703
  19. Study on Treatment of Lead 2，4, 6-trinitroresorcinate Wastewater Internal Electrolysis,X703
  20. The Pretreatment Research of Sludge Removal Liquid by Micro-Electrolysis United Electro-Fenton,X703.1
  21. Study on the Sludge Reduction by Electrochemistry,X703.1

CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
© 2012 www.DissertationTopic.Net  Mobile