Application of Activated Biomaterial in the Rapid Start-up and Stable Operation of Biological Processes for Removal Cadmium from Effluent

详细信息    查看全文

• 作者：Minxi Wu ; Xing Yan ; Keyi Liu ; Le Deng
• 关键词：Cadmium removal ; Sulfate ; reducing bacteria ; Nickel–iron bimetallic ; Carboxymethyl konjac glucomannan
• 刊名：Water, Air, & Soil Pollution
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：228
• 期：1
• 全文大小：
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment, general; Water Quality/Water Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Soil Science & Conservation; Hydrogeology; Climate Change/Climate Change Impacts;
• 出版者：Springer International Publishing
• ISSN：1573-2932
• 卷排序：228

文摘

With the aim of treating effluent containing Cd2+, a low-cost and efficient technique has been established in this work. By a combination of sulfate-reducing bacteria (SRB), carboxymethyl konjac glucomannan (CMKGM), and nickel–iron bimetallic (Ni/Fe) nanoparticles, we greatly enhanced Cd2+ removal and bacteria resistance to metals toxicity. Furthermore, it had much higher removal efficiencies (99.72%) than SRB (57.38%), CMKGM (52.46%), and Ni/Fe (58.91%) systems after 48 h in the treat processes. The parameters effecting Cd2+ removal of this system were obtained: the initial Cd2+ concentrations 150 mg/L, optimum pH 7.0, optimum temperature 37 °C, optimum time 48 h, respectively. CMKGM and SRB played significant roles in Cd2+ adsorption as they contained many functional groups on their surfaces. In addition, SRB promoted the degeneration of inorganic contaminants. The mechanism of adsorption was clarified by a serious of analysis. Overall, this study provided a highly efficient activated biomaterial for the practical treatment of Cd2+ in wastewater.