化工科技2024，Vol.32Issue(4) ：49-54.

十二烷基三甲基溴化铵改性纳米CaCO3对刚果红的吸附性能

Modified nano-calcium carbonate with dodecyl trimethyl ammonium bromide and its adsorption properties of Congo red

管董豪 张亚 王金玺 焦玉荣 邢艳 李敏
化工科技2024，Vol.32Issue(4) ：49-54.
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十二烷基三甲基溴化铵改性纳米CaCO3对刚果红的吸附性能

Modified nano-calcium carbonate with dodecyl trimethyl ammonium bromide and its adsorption properties of Congo red

管董豪 1张亚 1王金玺 1焦玉荣 1邢艳 1李敏1
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作者信息

  • 1. 榆林学院化学与化学工程学院,陕西榆林 719000
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摘要

以固体废弃物脱硫石膏为原料,在加氨水、通CO2气体条件下制备纳米CaCO3,用表面活性剂十二烷基三甲基溴化铵(DTAB)对纳米CaCO3进行改性,对改性材料DTAB-CaCO3进行表征.研究刚果红在DTAB-CaCO3表面的吸附行为,考察影响DTAB-CaCO3对刚果红吸附性能的因素,数学拟合吸附过程,计算热力学参数.结果表明,ρ(刚果红)=50 mg/L、m(DTAB-CaCO3)∶V(刚果红)=0.20 g/L、pH=2、t=120 min,吸附率为95％.该吸附过程为自发放热,符合Langmuir等温式的单分子层吸附模型和二级吸附动力学模型.

Abstract

Nano-calcium carbonate(CaCO3)was prepared from solid waste desulphurized gypsum in the condition of ammonia water and CO2 gas.The nano-calcium carbonate was modified by the surfactant dodecyl trimethyl ammonium bromide(DTAB).DTAB-CaCO3 was characterized and its adsorption performance for Congo red solution was studied.The effects of DTAB-CaCO3 dosage,temperature,ρ(Congo red)and time on the adsorption results were investigated.The adsorption kinetics and isothermal adsorption process were fitted and the thermodynamic parameters were calculated.The results show that when ρ(Congo red)=50 mg/L,m(DTAB)∶V(CaCO3)=0.20 g/L,pH=2 adsorption time is 120 min,the adsorption rate can reach 95％.The adsorption process is exothermic and spontaneous,and conforms to Langmuir isothermal single molecular layer adsorption model and second-order adsorption kinetic model.

关键词

脱硫石膏/纳米CaCO3/改性/吸附/刚果红

Key words

Desulfurized gypsum/Nanometer calcium carbonate/Modified/Adsorption/Congo red

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基金项目

陕西省科技厅项目(2024GX-YBXM-429)

陕西省科技厅项目(2024JC-YBQN-0153)

榆林市科技局资助项目(2023-CXY-149)

榆林市科技局资助项目(2023-CXY-148)

榆林市科技局资助项目(2023-CXY-153)

出版年

2024
化工科技
中国石油天然气股份有限公司吉林石化分公司

化工科技

CSTPCD
影响因子：0.386
ISSN：1008-0511
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