应用生态学报2018，Vol.29Issue(4)：1328-1338,11.DOI:10.13287/j.1001-9332.201804.034
不同炭化温度制备的蚕丝被废弃物生物炭对重金属Cd2+的吸附性能
Cadmium adsorption by biochar prepared from pyrolysis of silk waste at different temperatures
摘要
Abstract
In this study,biochars (BC300,BC500 and BC700) were produced from silk waste through pyrolysis under oxygen-limited condition at 300,500 and 700 ℃,respectively.The physicochemical properties of biochar were detected by scanning electron microscopy (SEM),Fourier transform infrared spectroscopy (FT-IR),X-ray diffractometer (XRD) and specific surface area analyzer.The Cd2+ adsorption capacities of biochars were investigated.Results showed that BET surface area,pH,and ash were increased with the increases of pyrolysis temperature.SEM images showed that the surfaces of biochars were rough and irregular.XRD and FT-IR results showed that all the silk waste biochars obtained at different temperatures contained calcite,pH had limited influence on the removal efficiency of biochar for Cd2+.Langmuir isotherm fitted the experimental data quite well.The Langmuir monolayer adsorption capacity of BC300,BC500,and BC700 were 25.61,52.41,and 91.07 mg · g-1,respectively.The adsorption of Cd2+ onto the biochars obeyed a pseudo second-order kinetic model,with the BC700 showing the best removal efficiency.Furthermore,the effects of the ionic strength and coexisting cations on Cd2+ removal were investigated.The results showed that the removal of Cd2+ was decreased with the increases of NaCl.Among the coexisting cations,the removal of Cd2+ was decreased by Ca2+ and Mg2+,while K+ had limited effect on the removal of Cd2+.In conclusion,the biochar derived from silk waste pyrolysis is a potential attractive adsorbent for the removal of Cd2+ from water.关键词
生物炭/蚕丝被废弃物/炭化温度/Cd2+/吸附Key words
biochar/silk waste/pyrolysis temperature/Cd2+/adsorption引用本文复制引用
计海洋,汪玉瑛,吕豪豪,刘玉学,杨瑞芹,杨生茂..不同炭化温度制备的蚕丝被废弃物生物炭对重金属Cd2+的吸附性能[J].应用生态学报,2018,29(4):1328-1338,11.基金项目
本文由浙江省自然科学基金项目(LQ17D020002,LY16D010004)、浙江省农业生物资源生化制造协同创新中心/浙江省农产品化学与生物加工技术重点实验室开放基金项目(2016KF0116)资助 （LQ17D020002,LY16D010004）
This work was supported by the Natural Science Foundation of Zhejiang(LQ17D020002,LY16D010004) and the Zhejiang Provincial CollaborativeInnovation Center of Agricultural Biological Resources Biochemical Manufacturing/Zhejiang Provincial Key Labarotory for Chem&Bio Processing Technology of Farm Product open fund (2016KF0116). （LQ17D020002,LY16D010004）
