污水污泥的电磁感应热解：生物炭特性及其在吸附去除水溶液中 Pb(II)、Cd(II)中的应用。
Pyrolysis of sewage sludge by electromagnetic induction: Biochar properties and application in adsorption removal of Pb(II), Cd(II) from aqueous solution.
机构信息
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, Hubei 430070, China.
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, Hubei 430070, China.
出版信息
Waste Manag. 2019 Apr 15;89:48-56. doi: 10.1016/j.wasman.2019.03.047. Epub 2019 Apr 3.
Pyrolysis of sewage sludge was studied by electromagnetic induction (EMI) heating method and in a laboratory-scale reaction installation. Basic properties and adsorption of heavy metals Pb and Cd on biochar from EMI pyrolysis of sewage sludge was investigated. Experimental results indicate that EMI pyrolysis temperature was determined by the relationship between working voltage of EMI device and induction media. Biochar yield rate ranged from 89.7% to 51.2% at temperature from 300 to 600 °C. Elements, surface characterizations and micromorphology, thermogravimetric properties as well as gas evolution changed with increasing pyrolysis temperature. Hydroxyl groups were decomposed during EMI pyrolysis process. Heavy metals in biochar was leached through TCLP and higher leachability was obtained in biochar pyrolyzed at 400 °C compared to other biochar products. A higher adsorption removal efficiency of Pb and Cd was obtained by EMI pyrolyzed biochar. Langmuir and pseudo-first-order models were used for description of adsorption isotherm and kinetics.
采用电磁感应（EMI）加热法在实验室规模的反应装置中研究了污水污泥的热解。研究了 EMI 热解污水污泥制备的生物炭对重金属 Pb 和 Cd 的吸附性能。实验结果表明，EMI 热解温度由 EMI 装置的工作电压与感应介质之间的关系决定。在 300 至 600°C 的温度范围内，生物炭产率范围为 89.7%至 51.2%。随着热解温度的升高，元素、表面特性和微观形态、热重特性以及气体释放都发生了变化。在 EMI 热解过程中，羟基基团被分解。通过TCLP 浸出法测定生物炭中的重金属浸出率，与其他生物炭产品相比，在 400°C 下热解得到的生物炭的浸出率更高。EMI 热解生物炭对 Pb 和 Cd 的吸附去除效率更高。Langmuir 和拟一级动力学模型被用于描述吸附等温线和动力学。
Zotero 插件