scholarly journals 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 ◽  
2018 ◽  
Vol 8 (16) ◽  
pp. 9006-9016 ◽  
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.

Adsorption characteristics of methylene blue onto agricultural wastes lotus leaf in bath and column modes

2011 ◽  
Vol 64 (3) ◽  
pp. 654-660 ◽  
Author(s):  
Xiuli Han ◽  
Wei Wang ◽  
Xiaojian Ma
Keyword(s):  
Methylene Blue ◽  
Fixed Bed ◽  
Isotherm Models ◽  
Column Experiments ◽  
Fixed Bed Column ◽  
Lotus Leaf ◽  
Bed Height ◽  
Column Adsorption ◽  
Equilibrium Data ◽  
Leaf Powder

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.

Batch and fixed-bed column adsorption of tetrabromobisphenol A onto metal organic resin: equilibrium, kinetic and mechanism studies

2020 ◽  
Vol 44 (29) ◽  
pp. 12771-12778
Author(s):  
Zhongmin Feng ◽  
Zhenghao Zhu ◽  
Ting Sun
Keyword(s):  
Fixed Bed ◽  
Tetrabromobisphenol A ◽  
Column Experiments ◽  
Fixed Bed Column ◽  
Column Adsorption ◽  
Metal Organic ◽  
Organic Resin ◽  
Contaminated Waters

MORs were prepared through fabricating MOFs and resin for effective TBBPA removal in fix-bed column experiments from contaminated waters.

scholarly journals Batch and fixed-bed column study for p-nitrophenol, methylene blue, and U(VI) removal by polyvinyl alcohol–graphene oxide macroporous hydrogel bead

2017 ◽  
Vol 77 (1) ◽  
pp. 91-100 ◽  
Author(s):  
Dan Chen ◽  
Jun Zhou ◽  
Hongyu Wang ◽  
Kai Yang
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Polyvinyl Alcohol ◽  
Fixed Bed ◽  
Column Experiments ◽  
Maximum Adsorption Capacity ◽  
Fixed Bed Column ◽  
Hydrogel Bead ◽  
Bdst Model ◽  
Adsorption Capacities

Abstract There is an increasing need to explore effective and clean approaches for hazardous contamination removal from wastewaters. In this work, a novel bead adsorbent, polyvinyl alcohol–graphene oxide (PVA-GO) macroporous hydrogel bead was prepared as filter media for p-nitrophenol (PNP), dye methylene blue (MB), and heavy metal U(VI) removal from aqueous solution. Batch and fixed-bed column experiments were carried out to evaluate the adsorption capacities of PNP, MB, and U(VI) on this bead. From batch experiments, the maximum adsorption capacities of PNP, MB, and U(VI) reached 347.87, 422.90, and 327.55 mg/g. From the fixed-bed column experiments, the adsorption capacities of PNP, MB, and U(VI) decreased with initial concentration increasing from 100 to 400 mg/L. The adsorption capacities of PNP, MB, and U(VI) decreased with increasing flow rate. Also, the maximum adsorption capacity of PNP decreased as pH increased from 3 to 9, while MB and U(VI) presented opposite tendencies. Furthermore, the bed depth service Time (BDST) model showed good linear relationships for the three ions' adsorption processes in this fixed-bed column, which indicated that the BDST model effectively evaluated and optimized the adsorption process of PVA-GO macroporous hydrogel bead in fixed-bed columns for hazardous contaminant removal from wastewaters.

Nitrate sorption from water on a Surfactant-Modified Zeolite. Fixed-bed column experiments

2011 ◽  
Vol 142 (2-3) ◽  
pp. 549-556 ◽  
Author(s):  
Joachim Schick ◽  
Philippe Caullet ◽  
Jean-Louis Paillaud ◽  
Joël Patarin ◽  
Claire Mangold-Callarec
Keyword(s):  
Fixed Bed ◽  
Column Experiments ◽  
Fixed Bed Column ◽  
Modified Zeolite

scholarly journals Adsorptive Removal of Trichloroethylene in Water by Crop Residue Biochars Pyrolyzed at Contrasting Temperatures: Continuous Fixed-Bed Experiments

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Ming Zhang ◽  
Mahtab Ahmad ◽  
Mohammad I. Al-Wabel ◽  
Meththika Vithanage ◽  
Anushka Upamali Rajapaksha ◽  
...  
Keyword(s):  
Organic Contaminants ◽  
Crop Residue ◽  
Fixed Bed ◽  
Good Alternative ◽  
Column Experiments ◽  
Thomas Model ◽  
Breakthrough Time ◽  
Fixed Bed Column ◽  
Adsorptive Removal ◽  
Adsorption Data

Biochar (BC) has attracted great attention as an alternative sorbent to activated carbon (AC). Objective of this study was to determine trichloroethylene (TCE) removal by soybean stover BC pyrolyzed at 300 (BC300) and 700°C (BC700) in continuous fixed-bed column. Columns packed with BC300, BC700, and AC reached breakthrough time in 1.1, 27.0, and 50.7 h, respectively. BC700 had higher TCE adsorption capacity than BC300 due to its higher surface area, nonpolarity, and aromaticity. The sorption capacities of AC (774.0 mg g−1) and BC700 (515.1 mg g−1) were 21.6 and 14.4 times higher than that of BC300 (35.9 mg g−1). The lower desorption rate of TCE from BC300 than BC700 and AC may be attributed to the strong binding/partition of TCE to the noncarbonized part of BC. Thomas model also adequately described the adsorption data indicating interphase mass transfer. Overall, AC showed best efficiency for removing TCE from water in column experiments. However, although sorption and desorption capabilities of BC700 were a little lower than AC, it is still a good alternative for AC to remove organic contaminants such as TCE from water due to its cost-effectiveness.

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