摘要
用CaCl_2、MgCl_2对橘子皮进行改性,并以橘子皮为原料制备了生物炭,用电子扫描显微镜(SEM)和红外光谱(IR)表征了吸附剂的微观结构和官能团,并研究其对重金属离子Pb^(2+)的吸附性能。实验结果表明,CaCl_2改性橘子皮对Pb^(2+)的吸附性能最好,在最优吸附条(Pb^(2+)初始浓度40 mg·L^(-1),30℃,30 min)下,吸附率可达99.8%,最大吸附容量为22.39 mg·g^(-1)。吸附等温线的拟合结果表明,CaCl_2改性橘子皮对Pb^(2+)的吸附为Langmuir单层吸附,吸附剂能够循环利用3次以上。
Biochar was prepared by the tangerine peel using the method of calcinations. The tangerine peel powder was chemically modified by calcium chloride and magnesium chloride,respectively. The obtained adsorption was characterized by SEM and IR. The adsorption properties were investigated by the adsorption of Pb^2+. It is shown that tangerine peel modified by CaCl2 displays the best adsorption property. The adsorption conditions were optimized as the initial concentration of Pb^2+ 40 mg·L^-1,30 ℃,and 30 min. The adsorption rate can reach 99.8% and the maximum adsorption capacity is 22.39 mg·g^-1. The adsorption of Pb^2+ is tested as Langmuir adsorption. The adsorbent could be recycled more than 3 times.
作者
钱晓敏
丛龙洋
张钱丽
QIAN Xiaomin;CONG Longyang;ZHANG Qianli(School of Chemistry,Biology and Materials Engineering,SUST,Suzhou 215009,China;Jiangsu Helsen Testing Technology Services Co.,Ltd.,Suzhou 215123,China)
出处
《苏州科技大学学报（自然科学版）》
CAS
2019年第1期48-52,84,共6页
Journal of Suzhou University of Science and Technology（Natural Science Edition）
基金
国家自然科学基金青年基金资助项目(20905055)
关键词
橘子皮
吸附剂
PB^2+
化学改性
tangerine peel
adsorbents
Pb^2+
chemical modification
