摘要
生物炭是一种廉价而高效的绿色环保吸附剂,在水处理领域备受青睐。以芦苇和香蒲为原材料,在不同碳化温度(400,500℃)、不同碳化时间(3, 4, 5, 6 h)下制取生物炭,采用碳酸钾作为改性剂处理生物炭,并将其应用于双酚A(4,4′-Isopropylidenediphenol, BPA)废水处理。结果表明:500℃碳化5 h,碳酸钾改性剂与生物炭原料质量比为2∶1条件下制备的改性芦苇生物炭对BPA的去除效果最好;改性芦苇生物炭投加量为10 mg,接触时间为1 440 min时,吸附量可达到1.593 mg·g^(-1),去除率高达97.07%。香蒲改性生物炭对BPA吸附符合准二级动力学吸附模型和Langmuir等温吸附模型,为单分子层吸附。以芦苇为材料制备的碳酸钾改性生物炭可用于BPA废水的处理,并解决湿地废弃植物造成的环境问题。
Biochar is a cheap and efficient green adsorbent which is widely applied in the field of water treatment. In this study, Phragmites and Typhaas raw materials were used to make biochar with slow pyrolysis at different carbonization temperatures(400,500 ℃), different carbonization time(3,4,5,6 h). The above biochars were treated by potassium carbonate modification, and then which was applied to treat 4,4′-Isopropylidenediphenol(BPA) wastewater. The results show that BPA removal performance of modified Phragmites biochar made at 500 ℃ carbonization 5 h with potassium carbonate modifier and biochar raw material quality ratio of 2∶1 is best, with removal efficiency of 97.07% and adsorption capacity of 1.593 mg·g^(-1) on the condition of modified biochar dosage of 10 mg and contact time of 1 440 min. The adsorption process of potassium carbonate modified Phragmites is fitted with quasi-second-order kinetic equation. However, the isothermal adsorption accords with the Langmuir model, which is a single-layer adsorption process. Potassium carbonate modified Phragmites biochar can be used for the treatment of BPA wastewater which can solve environmental problems caused by waste plants in wetlands.
作者
潘晶
张钰茜
杨墨
王诗尧
李琳
黄琳丽
PAN Jing;ZHANG Yuxi;YANG Mo;WANG Shiyao;LI Lin;HUANG Linli(College of Life Science,Shenyang Normal University,Shenyang 110034,China)
出处
《沈阳师范大学学报（自然科学版）》
CAS
2022年第6期520-526,共7页
Journal of Shenyang Normal University:Natural Science Edition
基金
辽宁省“百千万人才工程”资助项目(2019921076)
沈阳市科学技术计划项目(21-108-9-36)。
关键词
生物炭
碳酸钾
改性
湿地植物
biochar
potassium carbonate
modification
wetland plants
