XAFS investigation for inhomogeneous and irreversible reaction mechanism in hydroxide/sulfide coprecipitation treatment

2014 Fiscal Year Final Research Report

• Project/Area Number: 24561006
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Earth system and resources enginnering
• Research Institution: Waseda University
• Principal Investigator: TOKORO Chiharu 早稲田大学, 理工学術院, 准教授 (90386615)
• Co-Investigator(Kenkyū-buntansha): NUMAKO Chiya 千葉大学, 理学研究科, 准教授 (80284280)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 廃水処理 / 固液界面 / 固体分析 / 定量モデル / 表面錯体 / 表面沈殿

Outline of Final Research Achievements

Immobilization mechanism of As(V), F, Si(IV), Zn(II) to ferrihydrite and aluminum hydroxide in co-precipitation process was revealed using several solid analysis and basic chemical engineering method, toward construction of efficient treatment process for acid mine drainage. Based on the knowledge obtained from these investigation, a quantitative model was constructed for immobilization of several toxic elements to in wastewater treatment, using chemical equilibrium calculation coupled by surface complexation model between each toxic element and ferrihydrite/aluminum hydroxide and reaction rate model of precipitation. Obtained model could represent experimental neutralization results using real acid mine drainage.

Free Research Field

資源循環工学