Modelling Cd(II) removal from aqueous solutions by adsorption on a highly mineralized peat. Batch and fixed-bed column experiments

The adsorption potential of lotus leaf to remove methylene blue (MB) from aqueous solution was investigated in batch and ﬁxed-bed column experiments. Langmuir, Freundlich, Temkin and Koble–Corrigan isotherm models were employed to discuss the adsorption behavior. The results of analysis indicated that the equilibrium data were perfectly represented by Temkin isotherm and the Langmuir saturation adsorption capacity of lotus leaf was found to be 239.6 mg g−1 at 303 K. In ﬁxed-bed column experiments, the effects of flow rate, influent concentration and bed height on the breakthrough characteristics of adsorption were discussed. The Thomas and the bed-depth/service time (BDST) models were applied to the column experimental data to determine the characteristic parameters of the column adsorption. The two models were found to be suitable to describe the dynamic behavior of MB adsorbed onto the lotus leaf powder column.

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Removal of Cd(II) Ions from Aqueous Solutions Using Immobilized Spent Substrates of Pleurotus ostreatus in a Fixed-Bed Column

Environmental Engineering Science ◽

10.1089/ees.2019.0088 ◽

2019 ◽

Vol 36 (9) ◽

pp. 1162-1169 ◽

Cited By ~ 1

Author(s):

Juanjuan Qu ◽

Yue Li ◽

Tingting Zang ◽

Yu Jin ◽

Xuesheng Liu ◽

...

Keyword(s):

Aqueous Solutions ◽

Pleurotus Ostreatus ◽

Fixed Bed ◽

Fixed Bed Column

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Cr(III) removal from aqueous solutions: A straightforward model approaching of the adsorption in a fixed-bed column

Journal of Environmental Science and Health Part A ◽

10.1080/10934529.2013.838855 ◽

2013 ◽

Vol 49 (2) ◽

pp. 179-186 ◽

Cited By ~ 22

Author(s):

Antonio David Dorado ◽

Xavier Gamisans ◽

Cesar Valderrama ◽

Montse Solé ◽

Conxita Lao

Keyword(s):

Aqueous Solutions ◽

Fixed Bed ◽

Fixed Bed Column

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

RSC Advances ◽

10.1039/c8ra00166a ◽

2018 ◽

Vol 8 (16) ◽

pp. 9006-9016 ◽

Cited By ~ 6

Author(s):

Shaogang Liu ◽

Wenzhen Zhang ◽

Xuecai Tan ◽

Fang Zhao ◽

Wanting Huang ◽

...

Keyword(s):

Humic Acid ◽

Fixed Bed ◽

Column Experiments ◽

Fixed Bed Column

Factors that affect adsorption of a synthetic humic acid (HA) on a zeolite modified with the surfactantN,N-dimethyl dehydroabietylamine oxide (DAAO) (SMZ) were investigated in batch and fixed bed column experiments.

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Magnetic Fe3O4@Chitosan Carbon Microbeads: Removal of Doxycycline from Aqueous Solutions through a Fixed Bed via Sequential Adsorption and Heterogeneous Fenton-Like Regeneration

Journal of Nanomaterials ◽

10.1155/2018/5296410 ◽

2018 ◽

Vol 2018 ◽

pp. 1-14 ◽

Cited By ~ 5

Author(s):

Bo Bai ◽

Xiaohui Xu ◽

Changchuan Li ◽

Jianyu Xing ◽

Honglun Wang ◽

...

Keyword(s):

Aqueous Solutions ◽

High Efficiency ◽

Low Cost ◽

Fixed Bed ◽

Breakthrough Curves ◽

Chitosan Hydrogel ◽

Fixed Bed Column ◽

Adsorptive Removal ◽

Sequential Adsorption ◽

Cracking Process

The adsorptive removal of antibiotics from aqueous solutions is recognized as the most suitable approach due to its easy operation, low cost, nontoxic properties, and high efficiency. However, the conventional regeneration of saturated adsorbents is an expensive and time-consuming process in practical wastewater treatment. Herein, a scalable adsorbent of magnetic Fe3O4@chitosan carbon microbeads (MCM) was successfully prepared by embedding Fe3O4 nanoparticles into chitosan hydrogel via an alkali gelation-thermal cracking process. The application of MCM composites for the adsorptive removal of doxycycline (DC) was evaluated using a fixed-bed column. The results showed that pH, initial concentration, flow rate, and bed depth are found to be important factors to control the adsorption capacity of DC. The Thomas and Yoon-Nelson models showed a good agreement with the experimental data and could be applied for the prediction of the fixed-bed column properties and breakthrough curves. More importantly, the saturated fixed bed can be easily recycled by H2O2 which shows excellent reusability for the removal of doxycycline. Thus, the combination of the adsorption advantage of chitosan carbon with catalytic properties of magnetic Fe3O4 nanoparticles might provide a new tool for addressing water treatment challenges.

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