热解温度对制备不同类型秸秆生物炭及其吸附去除Cu~(2+)的影响Effects of the Pyrolysis Temperature on Cu~(2+) Removal Efficiency and Different Kinds of Straw Biochars
吕贵芬;陈院华;杨涛;李建国;谢杰;胡美容;
摘要(Abstract):
[目的]探讨热解温度对制备不同类型秸秆生物炭及其吸附去除Cu~(2+)的影响。[方法]以玉米、水稻、芝麻3类秸秆为原料于400~700℃热解炭化制备生物炭,探讨热解温度对秸秆生物炭的结构官能团、比表面积、孔径分布等结构及理化性质的影响,并评价生物炭对Cu~(2+)的吸附性能。[结果]生物炭的pH和比表面积随热解温度的升高而逐渐增大,而产率却逐渐稳定,其中热解温度的变化对水稻和芝麻秸秆生物炭的影响更为明显;此外,生物炭对Cu~(2+)的吸附效率与生物炭的种类和热解温度有关,升高热解温度有利于提高生物炭对Cu~(2+)的吸附去除率,且水稻和芝麻秸秆生物炭的吸附效率明显高于玉米秸秆生物炭,其中700℃下热解所制备的水稻和芝麻秸秆生物炭对Cu~(2+)的去除率可达100%。[结论]该研究可为控制农业环境污染提供科学依据。
关键词(KeyWords): 秸秆生物炭;热解温度;Cu2+吸附去除;理化性质
基金项目(Foundation): 江西省科技支撑项目(20151BBF60033);; 江西省农业科学院青年基金项目(2014CQN006);; 江西省重点研发计划项目(2016ACF60023)
作者(Author): 吕贵芬;陈院华;杨涛;李建国;谢杰;胡美容;
Email:
DOI: 10.13989/j.cnki.0517-6611.2017.07.022
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