摘要
钇作为高丰度稀土元素,广泛应用于各领域。在离子型稀土开采过程中,稀土母液会扩散至矿区周边水体,造成稀土资源浪费。为找寻高效吸附稀土钇的材料,本研究选用玉米秸秆烧制生物炭(BC),并负载羟基磷灰石制备生物炭复合材料(HAP@BC)。利用SEM、XRD和FTIR对HAP@BC进行表征,单因素吸附实验考察初始Y^(3+)浓度、生物炭投加量、pH、转速及吸附温度等因素对吸附性能的影响,吸附等温线分析其吸附特性,解吸实验考察其循环利用性能。结果表明,相比BC,HAP@BC的吸附量提升了3倍,pH为4.0时有最大吸附量为333.83 mg/g。吸附过程符合Langmuir单分子层吸附模型,且HAP@BC具有良好的循环利用性能,是一种潜在的Y^(3+)高效吸附剂。
As a high abundance rare earth element,yttrium is widely used in various fields.In the mining process of ion-type rare earth,rare earth mother liquor will diffuse to the water body around the mining area,resulting in the waste of rare earth resources.To find an efficient material for absorbing rare earth yttrium,biochar(BC)was fired from corn straw and loaded with hydroxyapatite to prepare biochar composite material(HAP@BC).HAP@BC was characterized with SEM,XRD and FTIR.Single-factor adsorption experiments were conducted to investigate the effects of initial Y^(3+) concentration,biochar dosage,pH,rotational speed and adsorption temperature on adsorption properties.Adsorption isotherms were used to analyze its adsorption characteristics,and desorption experiments were conducted to investigate its recycling performance.The results show that compared to BC,the adsorption capacity of HAP@BC has increased by three times,with a maximum adsorption capacity of 333.83 mg/g at pH 4.0.The adsorption process conforms to Langmuir monolayer adsorption model,and HAP@BC has good recycling performance,which is a potential Y^(3+) high-efficiency adsorbent.
作者
左华伟
刘祖文
余正旺
罗进
田帅
李鑫鹏
ZUO Huawei;LIU Zuwen;YU Zhengwang;LUO jin;TIAN Shuai;LI Xinpeng(Ganzhou Key Laboratory of Basin Pollution Simulation and Control,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;National and Provincial Joint Engineering Laboratory of the Hydraulic Engineering Safety and Efficient Utilization of Water Resources of Poyang Lake Basin(NHEP),Nanchang 330099,China)
出处
《有色金属科学与工程》
CAS
北大核心
2024年第3期457-463,共7页
Nonferrous Metals Science and Engineering
基金
国家自然科学基金资助项目(52160019)。
关键词
生物炭
羟基磷灰石
稀土钇
影响因素
吸附特性
biochar
hydroxyapatite
rare earth yttrium
influencing factors
adsorption characteristic
