Recent advances on humic acid removal from wastewater using adsorption process

Alomar, Tamara; Qiblawey, Hazim; Almomani, Fares; Al-Raoush, Riyadh I.; Han, Dong Suk; Ahmad, Nasir M.

doi:10.1016/j.jwpe.2023.103679

Cited by 24 publications

(5 citation statements)

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“…The adsorption capacity of 575 mg/g was obtained at 175 mg/L and pH 3 for the quaternized cellulose beads with 0.380 mmol/g. These values were compared with ones published in other articles [6,14,40,43,44,48,[60][61][62].…”

Section: Comparison With Other Adsorbentsmentioning

confidence: 99%

“…HA is a macromolecular compound [32,33], and the chemical properties are different depending on the source and extraction method. In common, an HA molecule carries multiple carboxy and phenolic hydroxy groups, although its structure varies with the geographical origin, age, climate, and biological conditions [6,[34][35][36]. Here, since the number of carboxy groups is higher than that of phenolic hydroxy groups in an HA molecule and carboxy groups are more acidic than phenolic hydroxy groups, the pK a value ranges from 4-6.…”

Section: Effect Of Phmentioning

confidence: 99%

“…HA can facilitate the absorption of micro-and macroelements in plants to enhance plant growth [5]. However, the presence of HA in water has been of environmental concern, and the removal of HA has become a necessary procedure in the water supply for our economy and community for the following reasons [6]. First, the presence of HA causes a yellowish or brownish color, bad taste and odor, and the growth of pathogenic microorganisms.…”

Section: Introductionmentioning

confidence: 99%

“…The methods for the removal of HA from aqueous media include adsorption, membrane filtration, flocculation and coagulation, and advanced oxidation processes [6,11]. One of the most prominent and most researched methods is the adsorption process.…”

Section: Introductionmentioning

confidence: 99%

“…In comparison with other removal methods, the adsorption process is an effective separation technique in terms of the simplicity of the design, ease of operation, insensitiveness to other substances, and variety of target pollutants that can be removed. Activated carbons produced from different agricultural wastes have been frequently used in many studies on the adsorptive removal of HA [6,[12][13][14]. However, some problems to be solved are raised; for example, the cost for chemical activation is high, the regeneration is difficult, the adsorption rate is low, and the adsorption capacity is low [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Kinetic, Isothermal, and Thermodynamic Analyses of Adsorption of Humic Acid on Quaternized Porous Cellulose Beads

Uchiyama,

Asamoto,

Minamisawa

et al. 2024

Macromol

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Porous cellulose beads were quaternized with glycidyltrimethylammonium chloride (GTMAC), and the potential use of the quaternized cellulose beads as an adsorbent was explored for the removal of humic acid (HA) from aqueous media. The introduction of quaternary ammonium groups was verified by FT-IR and XPS analyses, and their content increased to 0.524 mmol/g-Qcell by increasing the GTMAC concentration. The adsorption capacity of the HA increased with decreasing initial pH value and/or increasing content of quaternary ammonium groups, and a maximum adsorption capacity of 575 mg/g-Qcell was obtained for the quaternized cellulose beads with a content of quaternary ammonium groups of 0.380 mmol/g-Qcell. The removal % value increased with increasing dose of quaternized cellulose beads, and HA was highly removed at higher quaternary ammonium groups. The kinetics of the HA adsorption in this study followed a pseudo-second-order equation, and the process exhibited a better fit to the Langmuir isotherm. In addition, the k2 value increased with increasing temperature. These results emphasize that HA adsorption is limited by chemical sorption or chemisorption. The quaternized cellulose beads were repetitively used for the adsorption of HA without appreciable loss in the adsorption capacity. The empirical, equilibrium, and kinetic aspects obtained in this study support that the quaternized cellulose beads can be applied to the removal of HA.

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