Page 89 - 《精细化工》2022年第4期

第 39 卷第 4 期 精 细 化 工 Vol.39, No.4
2022 年 4 月 FINE CHEMICALS Apr. 2022

功能材料
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磁性羟基磷灰石改性氮化硼对 Pb 的吸附特性

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孙宁妍 ，邱海燕 ，兰贵红 ，王顺慧 1,2 ，刘 莹 ，邓春萍
（1. 西南石油大学 化学化工学院，四川 成都 610500；2. 汕头大学 海洋生物技术重点实验室，广东 汕
头 515063）
摘要：利用共沉淀法制备了磁性羟基磷灰石（MP）改性氮化硼（BN）的复合材料（MPBN），通过 SEM、BET、
FTIR、XRD、XPS 和 VSM 对 MPBN 形貌、孔径、比表面积、元素组成、晶型、表面官能团和磁性进行了表征，
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利用单因素吸附实验考察了 MPBN 对 Pb 的吸附特性。结果表明，MP 成功负载在 BN 的层状结构中，MPBN
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具有超顺磁性。当 Pb 初始质量浓度为 250 mg/L，温度为 25 ℃，pH=6.0，MPBN 投加量为 0.4 g/L，吸附时间
为 10 h 时，吸附量达到 460.75 mg/g，其吸附过程符合准二级动力学模型和 Langmuir 等温模型，表明 MPBN 对
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Pb 的吸附过程主要归因于单分子层的化学吸附。通过热力学模型拟合得到吸附过程的∆H 为 94.76 kJ/mol，∆S
为 339.61 J/(mol·K)，说明该吸附过程在常温下是自发的吸热过程。MPBN 在使用 5 次后仍然表现出优异的稳定
性和良好的可回收性。
关键词：氮化硼；磁性；羟基磷灰石；铅吸附；功能材料
中图分类号：X703；TQ424；TB34 文献标识码：A 文章编号：1003-5214 (2022) 04-0725-09

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Adsorption performance of Pb by magnetic
hydroxyapatite modified boron nitride

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SUN Ningyan , QIU Haiyan , LAN Guihong , WANG Shunhui , LIU Ying , DENG Chunping
（1. College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan,
China; 2. Key Laboratory of Marine Biotechnology, Shantou University, Shantou 515063, Guangdong, China）
Abstract: Magnetic hydroxyapatite (MP) modified boron nitride (BN) composites (MPBN) were prepared
by co-precipitation method. The morphology, pore size, specific surface area, elemental composition,
crystalline shape, surface functional groups and magnetic properties of MPBN were characterized by SEM,
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BET, FTIR, XRD, XPS and VSM. The adsorption properties of Pb by MPBN were investigated by single
factor adsorption experiments. The results showed that MP was successfully loaded in the lamellar structure
of BN and MPBN was superparamagnetic. The adsorption capacity reached 460.75 mg/g under the
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conditions of mass concentration of Pb was 250 mg/L, temperature of 25 ℃, pH=6.0 and MPBN dosage
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of 0.4 g/L, adsorption time 10 h. The adsorption process of MPBN for Pb was in accordance with pseudo
second-order kinetic model and Langmuir isothermal model, indicating that the adsorption process of
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MPBN for Pb was mainly attributed to the chemisorption of single molecular layer. ∆H and ∆S for the
adsorption process were 94.76 kJ/mol and 339.61 J/(mol·K) by fitting the thermodynamic model,
indicating that the adsorption process was a spontaneous endothermic process at normal temperature.
MPBN also showed excellent stability and good recyclability after 4 cycles.
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Key words: boron nitride; magnetism; hydroxyapatite; Pb adsorption; functional materials

[1]
铅是农业和工业废水中常见的污染物之一，具 对生态和粮食安全造成长期且持久的危害 ，一旦
有毒性强、难降解和易富集等特点，水体铅污染会 人体通过食物链的积累摄入过量，就会发生不可逆

收稿日期：2021-11-11; 定用日期：2022-01-25; DOI: 10.13550/j.jxhg.20211173
基金项目：油气田应用化学四川省重点实验室开放基金（YQKF202122）
作者简介：孙宁妍（1996—），女，硕士生，E-mail：326697378@qq.com。联系人：邱海燕（1976—），女，副教授，E-mail：windqq2002
@163.com。