负载改性钾长石吸附废水中苯酚的研究

doi:10.11962/1006-4990.2020-0135

Abstract

Abstract:

Potassium feldspar was used as the raw material to loaded calcium oxide and sodium silicate for more micro-meso-porous,then it was modified with hexadecyl trimethyl ammonium bromide.The synthesized modifier loaded potassium feldspar （CK） was used to adsorb the phenol in wastewater.The effects of the amount of CK,initial pH of solution,adsorption time,initial concentration of phenol and other factors on the phenol adsorption of CK was investigated.In addation,the kinetic and thermodynamic models were used to investigate the adsorption mechanism.Results showed that the removal rate of phenol in-creased with the CK amount.The better adsorption effect was obtained in the neutral solution.Adsorption began to reach equi-librium at 1 h;with the increase of the initial concentration of phenol（50~3 000 mg/L）,the adsorption capacity of CK increa-sed to 30.32 mg/g and tended to saturation,which was 9 times higher than that of the raw material.Quasi-second-order kinetic model and Freundlich isothermal adsorption model can better describe the process of CK adsorption of phenol,which showed that chemical adsorption was the main process.Langmuir and Freundlich isothermal adsorption models showed that potassium feldspar was favorable to adsorb phenol in wastewater after loading modification.

Key words: potassium feldspar, load modification, phenol wastewater

CLC Number:

TQ131.13

Han Cong,Sun Lina,Zhang Ting,Zhu Huixia,Li Ling. Study on adsorption of phenol in wastewater by loading modified potassium feldspar[J]. Inorganic Chemicals Industry, 2021, 53(2): 71-76.

Figures/Tables 12

References 22

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序号	因素				f/%
序号	A m（YK）∶ m（氧化钙）	B w（硅酸钠）/ %	C w（CTMAB）/ %	D 搅拌时间/ h	f/%
1	1∶0.3	4	1.2	0.5	52.85
2	1∶0.3	6	1.1	1.0	62.08
3	1∶0.3	8	1.0	2.0	51.55
4	1∶0.2	4	1.1	2.0	37.20
5	1∶0.2	6	1.0	0.5	41.47
6	1∶0.2	8	1.2	1.0	43.77
7	1∶0.4	4	1.0	1.0	43.47
8	1∶0.4	6	1.2	2.0	48.94
9	1∶0.4	8	1.1	0.5	53.75
K₁	55.49	44.51	48.52	49.36
K₂	40.81	50.83	51.01	49.77
K₃	48.72	49.69	45.50	45.90
R	14.68	6.32	5.51	3.87

样品	比表面积/（m²·g^-1）	总孔体积/（cm³·g^-1）	平均孔径/nm
YK	3.480 0	0.009 0	10.344 8
CK	72.034 5	0.172 2	9.562 1

准一级动力学方程	参数
准一级动力学方程	q_e/（mg·g^-1）	k₁/（mg·g^-1·min^-1）	R²
ln （q_m-q_t）=ln q_e-k₁t	0.076 0	0.004 1	0.361 0
准二级动力学方程	参数
准二级动力学方程	q_e /（mg·g^-1）	k₂/（g·g^-1·min^-1）	R²
t/q_t=1/k₂q_e²+t/q_e	3.196 9	0.193 5	0.999 9
颗粒内扩散方程	参数
颗粒内扩散方程	C	k_i /（mg·g^-1/2·min^-1/2）	R²
q_t=k_i t^1/2+C	3.026 2	0.060 8	0.309 3

Langmuir方程	参数
Langmuir方程	q_m /（mg·g^-1）	K_L/（L·mg^-1）	R²
ρ_e/q_e=ρ_e /q_m+1/K_Lq_m	47.824	0.000 6	0.961 1
Freundlich方程	参数
Freundlich方程	K_F /（mg·g^-1）	1/n	R²
ln q_e=ln K_F+ln ρ_e/n	0.095 2	0.746 7	0.985 2

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Inorganic Acid-Base-Salt Committee of CIESC

Study on adsorption of phenol in wastewater by loading modified potassium feldspar

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