Ceramsite preparation from sea sludge with sewage sludge biochar and its environmental risk assessment

International Conference on Energy Engineering and Environmental Protection 2017

能源学;生态环境科学

Li, Jie^1,2 ; Yu, Guangwei^1 ; Pan, Lanjia^1,2 ; Li, Chunxing^1 ; Xie, Shengyu^1,2 ; Wang, Gang^1,2 ; Wang, Yin^1

Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen

361021, China^1

University of Chinese Academy of Sciences, Beijing

100049, China^2

关键词: Bio chars;    Ceramsite;    Environmental risk assessment;    Environmental risks;    Leaching behaviours;    Potential ecological risk;    Residual fraction;    Slit pores;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/121/3/032035/pdf
DOI  :  10.1088/1755-1315/121/3/032035

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Ceramsite were produced from sea sludge (SS) by adding different percentage of sewage sludge biochar (SSB). The characteristics of ceramsite including micrograph and elementary composition were analyzed. In addition, the heavy metals (HMs) fractions, leaching behaviour and potential environmental risk were also investigated. The microstructure of the ceramsite was slit pores and the main elements of the ceramsite were Si, Al and O. The residual fraction (F4) of Cu, Cr and Cd in ceramsite with 100% SS (SS100) reached the maximum (100%, 99% and 100%, respectively), while F4 of Zn and Ni in ceramsite with 80% SS and 20% SSB (SS80) reached the top value of 99.5% and 98%. Moreover, the HMs of feedstock can be immobilized after sintering as ceramsite and the leached amounts of HMs in all ceramsite were much lower than that stated by GB 5085.3-2007. Furthermore, ceramsite preparation from sea sludge with sewage sludge biochar will not bring HMs contamination and potential ecological risk.