摘要
以前驱体法制备多孔氮化硼,研究其去除废水中Pb^(2+)性能。结果表明,随着pH的增加,多孔氮化硼对铅的吸附先增加后减少,在pH为4时达到最大吸附量168.7 mg/g。铅的吸附率随温度增加而先增加后减少,在25℃时达到峰值。氮化硼对Pb^(2+)的吸附很快,在240 min时达到平衡。干扰实验通过添加1 mmol/L的Zn^(2+)、Cu^(2+)、Cr^(3+)、Cd^(2+)、Co^(2+)、Mn^(2+)、Ni^(2+)进行,发现氮化硼对Pb^(2+)的吸附量仍可以高达190.0 mg/g,其他重金属的吸附量分别为27.68、54.82、49.40、85.49、21.60、19.41、9.00 mg/g。多孔氮化硼对Pb^(2+)的吸附符合Langumair模型和准1级动力学。
The porous boron nitride was prepared by precursor method,its performance in removing Pb^(2+) in wastewater was studied.The results showed that,with the increase of pH,the adsorption of lead by porous boron nitride increased first and then decreased,reaching the maximum adsorption capacity of 168.7 mg/g at pH was 4.The adsorption rate of lead increased first and then decreased with the increase of temperature,reaching the peak value at 25℃.The adsorption of Pb^(2+) by boron nitride was rapid and reached equilibrium at 240 min.Interference experiments were conducted by adding 1 mmol/L of Zn^(2+),Cu^(2+),Cr^(3+),Cd^(2+),Co^(2+),Mn^(2+),and Ni^(2+).It was found that the adsorption capacity of Pb^(2+) by boron nitridation was as high as 190.0 mg/g,and the adsorption capacity of other heavy metals was 27.68 mg/g,54.82 mg/g,49.40 mg/g,85.49 mg/g,21.60 mg/g,19.41mg/g,and 9.00 mg/g,respectively.Adsorption of Pb^(2+) by porous boron nitride was consistent with Langumair model and pesudo-first-order kinetics.
作者
王子曦
李彦龙
苏欣
李润东
WANG Zixi;LI Yanlong;SU Xin;LI Rundong(College of Energy and Environment,Shenyang Aerospace University,Key Laboratory of Clean Energy,Liaoning Province,Shenyang 110136,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2022年第3期99-103,共5页
Technology of Water Treatment
基金
国家自然科学基金(51706147)。
