Performance of a zeolite modified with N,N-dimethyl dehydroabietylamine oxide (DAAO) for adsorption of humic acid assessed in batch and fixed bed columns

Liu Shaogang; Zhang Wenzhen; Tan Xuecai; Zhao Fang; Huang Wanting; Du Hanchun; Goodman Bernard A.; Lei Fuhou; Diao Kaisheng

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Performance of a zeolite modified with N,N-dimethyl dehydroabietylamine oxide (DAAO) for adsorption of humic acid assessed in batch and fixed bed columns

机译：用N，N-二甲基脱氢胺氧化物（DAAO）改性沸石的性能，用于吸附分批和固定床柱中的腐殖酸

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Factors that affect adsorption of a synthetic humic acid (HA) on a zeolite modified with the surfactant N,N-dimethyl dehydroabietylamine oxide (DAAO) (SMZ) were investigated in batch and fixed bed column experiments. Adsorption increased with increasing HA concentrations and contact time, but decreased with increasing pH, temperature, and ionic strength. Adsorption of HA on SMZ was increased by the presence of the cations Ca2+ and Mg2+, whereas anions such as NO3-, HCO3-, SO42-, and PO43- showed the opposite trend, and competed with HA adsorption. HA adsorption on SMZ was well-fitted by pseudo-second order kinetics, and described by the Langmuir isotherm model. The maximum adsorption capacity in batch experiments calculated from the Langmuir adsorption isotherm was about 126 mg g(-1). Thermodynamic calculations showed that HA adsorption on the zeolite with bilayer DAAO coverage was spontaneous and exothermic. Optimum desorption was obtained using 0.1 M NaOH with a recovery of 94%. The HA adsorption capacity of SMZ at the breakthrough point was greatly influenced by bed depth, and could be described by the Thomas model. Adsorption mechanisms are interpreted as involving mainly hydrogen bonding and electrostatic interactions.

机译：在分批和固定床柱实验中研究了影响用表面活性剂N，N-二甲基脱氢胺氧化物（DAAO）（DAAO）（DAAO）改性的沸石上的合成腐殖酸（HA）的因素。随着HA浓度和接触时间增加，吸附增加，但随着pH，温度和离子强度的增加而降低。通过阳离Ca2 +和Mg2 +的存在，增加了SMZ上的HA，而诸如NO3-，HCO3-，SO42-和PO43之类的阴离子，表现出相反的趋势，并与HA吸附竞争。 SMZ上的HA吸附由伪二阶动力学齐全，并由Langmuir等温模型描述。由朗米尔吸附等温线计算的批量实验中的最大吸附容量约为126mg g（-1）。热力学计算显示HA吸附与双层Daao覆盖率的沸石是自发的和放热的。使用0.1M NaOH获得最佳解吸，回收率为94％。 SMZ在突出点处的HA吸附容量受到床深度的大大影响，并且可以由托马斯模型描述。吸附机制被解释为涉及主要氢键和静电相互作用。

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《RSC Advances》 |2018年第16期|共11页
作者
Liu Shaogang; Zhang Wenzhen; Tan Xuecai; Zhao Fang; Huang Wanting; Du Hanchun; Goodman Bernard A.; Lei Fuhou; Diao Kaisheng;
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Guangxi Univ Nationalities Sch Chem &

Chem Engn Guangxi Key Lab Chem &

Engn Forest Prod Guangxi Coll &

Univ Key Lab Food Safety &

Pharmac Nanning 530008 Guangxi Peoples R China;

Guangxi Univ Nationalities Sch Chem &

Chem Engn Guangxi Key Lab Chem &

Engn Forest Prod Guangxi Coll &

Univ Key Lab Food Safety &

Pharmac Nanning 530008 Guangxi Peoples R China;

Guangxi Univ Nationalities Sch Chem &

Chem Engn Guangxi Key Lab Chem &

Engn Forest Prod Guangxi Coll &

Univ Key Lab Food Safety &

Pharmac Nanning 530008 Guangxi Peoples R China;

Guangxi Univ Nationalities Sch Chem &

Chem Engn Guangxi Key Lab Chem &

Engn Forest Prod Guangxi Coll &

Univ Key Lab Food Safety &

Pharmac Nanning 530008 Guangxi Peoples R China;

Guangxi Univ Nationalities Sch Chem &

Chem Engn Guangxi Key Lab Chem &

Engn Forest Prod Guangxi Coll &

Univ Key Lab Food Safety &

Pharmac Nanning 530008 Guangxi Peoples R China;

Guangxi Univ Coll Phys Sci &

Engn Nanning 530004 Guangxi Peoples R China;

Guangxi Univ Nationalities Sch Chem &

Chem Engn Guangxi Key Lab Chem &

Engn Forest Prod Guangxi Coll &

Univ Key Lab Food Safety &

Pharmac Nanning 530008 Guangxi Peoples R China;

Guangxi Univ Nationalities Sch Chem &

Chem Engn Guangxi Key Lab Chem &

Engn Forest Prod Guangxi Coll &

Univ Key Lab Food Safety &

Pharmac Nanning 530008 Guangxi Peoples R China;

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1. Performance of a zeolite modified with N,N-dimethyl dehydroabietylamine oxide (DAAO) for adsorption of humic acid assessed in batch and fixed bed columns [J] . Liu Shaogang, Zhang Wenzhen, Tan Xuecai, RSC Advances . 2018,第16期

机译：用N，N-二甲基脱氢胺氧化物（DAAO）改性沸石的性能，用于吸附分批和固定床柱中的腐殖酸
2. Sorption of humic acids by a zeolite-feldspar-bearing tuff in batch and fixed-bed column [J] . Vincenzo Leone, Silvana Canzano, Pasquale Iovino, Journal of porous materials . 2012,第4期

机译：沸石-长石凝灰岩在间歇床和固定床塔中对腐殖酸的吸附
3. Removal of humic acid from water by adsorption onto dodecyltrimethylammonium bromide-modified zeolite in a fixed bed reactor [J] . Elsheikh Awad F., Ahmad Umi Kalthom, Ramli Zainab Desalination and water treatment . 2016,第18期

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7. Performance of a zeolite modified withN,N-dimethyl dehydroabietylamine oxide (DAAO) for adsorption of humic acid assessed in batch and fixed bed columns [O] . Shaogang Liu, Wenzhen Zhang, Xuecai Tan, 2018

机译：用于在分批和固定床柱中评估的腐殖酸吸附的沸石改性的N-二甲基脱氢胺氧化物（Daao）的性能

Performance of a zeolite modified with N,N-dimethyl dehydroabietylamine oxide (DAAO) for adsorption of humic acid assessed in batch and fixed bed columns

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