Rice Straw/Sewage Sludge-Based Composite Activated Carbon: Its Some Basic Properties and Adsorption Effect for Cr (VI)

5th Annual International Conference on Material Engineering and Application

工业技术（总论）;材料科学

Fan, Liangqian^1 ; Wang, Xianda^1 ; Wan, Wenxin^2 ; Liu, Qin^1 ; Cai, Jie^3 ; Wan, Yan^1

College of Civil Engineering, Sichuan Agricultural University, Dujiangyan

611830, China^1

College of Environment, Sichuan Agricultural Universities, Chengdu

611130, China^2

Department of Physical and Chemical Analysis, Dujiangyan Center for Disease Control and Prevention, Dujiangyan

611830, China^3

关键词: Adsorption effect;    Adsorption performance;    Composite activated;    Hazardous wastes;    Leaching concentrations;    Leaching toxicity;    Polar solutes;    Surface functional groups;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/484/1/012008/pdf
DOI  :  10.1088/1757-899X/484/1/012008

来源: IOP

【 摘 要 】

In this study, the rice straw/sewage sludge-based composite activated carbon (RS-SCAC) was prepared from the mixture of sewage sludge and rice straw. Some basic properties of RS-SCAC, i.e., yield, iodine number, contents of heavy metals, surface functional groups, and leaching toxicity, were characterized. Furthermore, the adsorption performance of RS-SCAC for Cr (VI) was investigated. For RS-SCAC, the yield was moderate, and the iodine number was higher than that of the sewage sludge-based activated carbon (SBAC). RS-SCAC contained a variety of heavy metals, and Zn, Fe, and Cu had the relatively high content. The surface of RS-SCAC was rich in functional groups, especially for-OH,-COOH, and-COH, which was helpful for the adsorption of polar solute. For all heavy metals except Zn in RS-SCAC, the leaching concentrations were below the limits for identifying hazardous wastes, which indicated that RS-SCAC was relatively safe. Compared with SBAC, RS-SCAC had the better adsorption effect for Cr (VI). The results indicated that RS-SCAC can be used as a safety and efficient adsorbent for Cr (VI).