东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2010, Vol. 31 ›› Issue (1): 127-131.DOI: -

• 论著 • 上一篇    下一篇

水洗废啤酒酵母去除电镀废水中镉的工艺试验研究

代淑娟;魏德洲;白丽梅;崔宝玉;   

  1. 东北大学资源与土木工程学院;河北理工大学资源与环境学院;
  • 收稿日期:2013-06-20 修回日期:2013-06-20 出版日期:2010-01-15 发布日期:2013-06-20
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50174014);;

Experimental investigation on removing cadmium from electroplating wastewater by water-washing process with waste saccharomyces cerevisiae

Dai, Shu-Juan (1); Wei, De-Zhou (1); Bai, Li-Mei (2); Cui, Bao-Yu (1)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China; (2) College of Resource and Environment, Hebei Polytechnic University, Tangshan 063009, China
  • Received:2013-06-20 Revised:2013-06-20 Online:2010-01-15 Published:2013-06-20
  • Contact: Dai, S.-J.
  • About author:-
  • Supported by:
    -

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摘要： 以水洗废啤酒酵母为吸附剂,采用自制试验装置,对电镀废水中重金属镉进行吸附-沉降工艺试验研究.结果表明,在废水处理量1L,废水中镉质量浓度为26mg/L,pH=7,吸附剂用量40g/L(湿重),室温约25℃,搅拌速度1000r/min,吸附时间30min,沉降240min的条件下,废水中镉的吸附率及吸附—沉降后镉的去除率分别达96.59%和94.25%.三级处理后废水中镉达到排放标准(<0.1mg/L).连续处理效果比间歇处理效果略差.采用扫描电子显微镜及表面能谱,分析了水洗废啤酒酵母对镉的吸附机理.结果表明,水洗废啤酒酵母对镉的吸附过程中细胞结构受到破坏,吸附过程有化学络合和静电吸附作用存在.

关键词: 工艺试验, 电镀废水, 水洗废啤酒酵母, 连续试验, 生物吸附

Abstract: The biosorption-sedimentation process for removing the heavy metal cadmium from electroplating wastewater was experimentally investigated taking the waste Saccharomyces cerevisiae as biosorbent on a self-making experimental setup. The results showed that biosorption rate and removed rate of Cd are 96.59% and 94.25% respectively on conditions that wastewater processed is 1L, Cd concentration in the wastewater about 26mg/L, pH value 7.0, the dose of the waste Saccharomyces cerevisiae 40g/L(in wet weight), at room temperature about 25°C, stiring speed 1000rpm, adsorbing time 30min and time for natural sedimentation 240min. The Cd concentration in wastewater after three-step biosorption comes up to china's national standard on effluents(&le0.1mg/L). With respect to the processing effect, the continuous process is relatively poorer than the intermittant one. The biosorption mechanism of the water-washing process with waste Saccharomyces cerevisiae for Cd removal was analyzed by SEM and EDS. The results showed that the cell structure of the bacteria used is destroyed in such a water-washing process, and the effects of chemical complexing and electrostatic adsorption are found in the biosorption process.

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