磁性NiO的制备及其选择性吸附性能

doi:10.11894/iwt.2020-1074

摘要/Abstract

摘要：

采用简单溶液法合成了分等级花状磁性氧化镍（NiO）微球，研究了制备的花状磁性NiO微球对水中染料刚果红的吸附效果，并探讨了吸附机理。结果表明，花状磁性NiO微球对刚果红的最大吸附量达155.9 mg/g，吸附机理可归因于带正电荷的吸附剂表面与阴离子染料刚果红之间的静电相互作用。磁性NiO微球能通过磁铁快速从溶液中分离，且对阴离子染料具有良好的选择吸附性能。

关键词: 磁性, 氧化镍, 刚果红, 选择性吸附

Abstract:

Magnetic nickel oxide(NiO) microspheres with hierarchical flower-like structures were synthesized by simple solution method. Adsorption effect of Congo red onto the prepared samples from aqueous solutions was investigated, and the adsorption mechanism was discussed. Results showed that the maximum adsorption capacity of prepared samples for Congo red was up to 155.9 mg/g. The adsorption mechanism was attributed to the electrostatic attraction force between positively charged adsorbent surface and anionic Conge red. The magnetic NiO microspheres could be rapidly separated from the suspension by a magnetic, and had an excellent selective adsorption performance on anionic dyes.

Key words: magnetic, nickel oxide, Congo red, selective adsorption

中图分类号:

X703

乐垚,刘亮君,亓丽芳,王超. 磁性NiO的制备及其选择性吸附性能[J]. 工业水处理, 2021, 41(6): 186-191.

Yao Le,Liangjun Liu,Lifang Qi,Chao Wang. Preparation of magnetic nickel oxide and its selective adsorption performance[J]. Industrial Water Treatment, 2021, 41(6): 186-191.

https://www.iwt.cn/CN/Y2021/V41/I6/186

图/表 13

参考文献 23

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样品	形貌	晶粒尺寸/nm	孔体积/(cm³·g^-1)	SeEr/(m²·g^-1)
NiO	花状微球	5.5	0.26	202
NiO-C	颗粒状	46.3	0.009	2.6

样品	形貌	晶粒尺寸/nm	孔体积/(cm³·g^-1)	SeEr/(m²·g^-1)
NiO	花状微球	5.5	0.26	202
NiO-C	颗粒状	46.3	0.009	2.6

样品	q_e(exp)/(mg·g^-1)	准一级动力学方程			准二级动力学方程
样品	q_e(exp)/(mg·g^-1)	q_e(cal)/(mg·g^-1)	K₁/10^-3min^-1	R²	q_e(cal)/(mg·g^-1)	K₂/10^-4·mg^-1·min^-1	R²
NiO	81.3	44.2	3.92	0.984 8	89.7	3.68	0.997 5
NiO-C	3.2	1.6	3.73	0.988 0	3.4	9.72	0.999 9

样品	q_e(exp)/(mg·g^-1)	准一级动力学方程			准二级动力学方程
样品	q_e(exp)/(mg·g^-1)	q_e(cal)/(mg·g^-1)	K₁/10^-3min^-1	R²	q_e(cal)/(mg·g^-1)	K₂/10^-4·mg^-1·min^-1	R²
NiO	81.3	44.2	3.92	0.984 8	89.7	3.68	0.997 5
NiO-C	3.2	1.6	3.73	0.988 0	3.4	9.72	0.999 9

样品	Langmuir等温线模型				Freundlich等温线模型
样品	q_max/(mg·g^-l)	K₁/(L·g^-l)	R²	R_L	K_F	n	R²
NiO	155.9	0.55	0.950	0.035	65.7	3.39	0.884
NiO-C	38.5	0.07	0.947	0.22	7.9	2.51	0.789

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