College of Chemistry, Liaoning University, Shenyang, 110036, China
In this paper, sludge bio-carbon was prepared by pyrolysis and carbonization of sewage sludge from the first sewage treatment plant and the second sewage treatment plant of A city. The physicochemical properties and cadmium adsorption properties were characterized. The results show that the optimum activation temperatures of sludge in different sewage treatment plants are different. The optimum activation temperature of the sludge in the first sewage treatment plant is 300 centigrade, and the sludge in the second sewage treatment plant is 400 centigrade. In the first sewage treatment plant, the adsorption equilibrium of cadmium by bio char is formed about 7h later. The adsorption equilibrium of cadmium by bio char is formed about 5h later in the second sewage treatment plant. The adsorption capacity of bio char to cadmium increases with the increase of pH value in the sewage plant.
Bio-char, Cadmium adsorption, Urban sewage plant
Zongxuan Han. Research on Preparation of Bio-char and Cadmium Adsorption by the Sewage from the Urban Sewage Plant. International Journal of New Developments in Engineering and Society (2017) Vol.1, Num.1: 63-66.
 Wang Xingdong, Zhang Bin, Yu Guangwei, Tung Kehsien, Lin Jingjiang, Wang Yin. Preparation of biochar with different particle sized sewage Sewage and its characteristics [J]. CIESC Journal, 2016,67(11): 4808-4816.
 He Jiaxi, Cadmium Adsorption of Bio-char Prepared by the Sewage from the Urban Sewage Plant [J]. Environment and Sustainable Development, 2016(2): 81-83.
 Yingyue Zhang, Jennifer W. Chan, Alysha Moretti, Kathryn E. Uhrich, Designing Polymers with Sugarbased Advantages for Bioactive Delivery Applications [J] Journal of Controlled Release, 2015,(219): 355-368.
 Wang Yafei, Tian Yuchuan, Liu Yue, He Peimen,Sun Xiaolong. Cadmium Adsorption of Urban Sewage Plant Excess Sewage Derived Bio-Char [J].Sichuan Environment, 2012, 31(5): 12-15.