Removal of triclosan from aqueous solution via adsorption by kenaf‐derived biochar: Its adsorption mechanism study via spectroscopic and experimental approaches

Cho, Eun-Ji; Kang, Jin‐Kyu; Moon, Joon‐Kwan; Um, Byung-Hwan; Lee, Changgu; Jeong, Sanghyun; Park, Seong‐Jik

doi:10.1016/j.jece.2021.106343

Cited by 39 publications

(20 citation statements)

References 99 publications

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“…The adsorption capacity of carbon black on TCS was stronger at a higher TCS concentration when the solution was acidic. As described in previous work [17], triclosan (pKa = 8.14) does not dissociate at acidic pH, thus minimizing electrostatic repulsive interactions and improving the adsorption capacity; moreover, the increase in the final solution to alkaline pH led to the dissociation of triclosan, converting to a negative ion. When the pH of the solution is 3, the carbon black surface is positively charged, and the TCS in the solution is primarily in the TCS-form, resulting in an electrostatic gravitational attraction between them that aids the adsorption reaction.…”

Section: Effect Of Phmentioning

confidence: 62%

Carbon Black: A Good Adsorbent for Triclosan Removal from Water

Wang

Man

Sun

et al. 2022

Water

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Industrial grade carbon black was pretreated and used for adsorption of triclosan (TCS) in water, and its adsorption performance was investigated by static adsorption experiments and fixed bed adsorption experiments. The effects of pH and temperature on the adsorption capacity were investigated and the adsorption performance of carbon black and activated carbon on TCS was compared. As the pH or temperature decreased, the adsorption of TCS by carbon black increased. Carbon black had a maximum adsorption capacity of 18.62 mg/g on TCS, which was somewhat lower than the activated carbon. Furthermore, the breakthrough time increased with increasing bed height, decreasing flow rate and decreasing initial TCS concentration in the fixed bed adsorption studies. The breakthrough time was 14.33 days at a bed depth of 4.2 mm, a flow rate of 2 mL/min, and an initial TCS concentration of 0.5 mg/L TCS. The model from The Bed Depth Service Time (BDST) was well-fitting.

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Section: Effect Of Phmentioning

confidence: 62%

Carbon Black: A Good Adsorbent for Triclosan Removal from Water

Wang

Man

Sun

et al. 2022

Water

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“…The kenaf used as the base material for Al impregnation was procured from the Agricultural Research Institute (Jeonbuk, Korea). The chemical composition and physical properties of kenaf are available in the literature (Kim and Um 2020;Cho et al 2021). Only the stem of the kenaf was used, not the leaves and roots; the stem was ground and then sieved to 425 μm.…”

Section: Production Of Al-impregnated Kenaf Biocharmentioning

confidence: 99%

“…Here, the sharp weight loss up to 240-300 °C may result from the removal of surface functional groups and hydroxyl groups generated by co-precipitation (Ding et al 2018;Ebadi et al 2021). The moderate weight loss at 420-700 °C may be due to loss of C, that is, the continuous breakdown of lignin (Cho et al 2021). content is attributed to the combustion of organic matter with increasing carbonization temperature, and a slight decrease in the C content simultaneously causes a high mineral content (Stefaniuk et al 2015).…”

Section: Characteristics Of Al-knfmentioning

confidence: 99%

“…Thus, the high productivity and adsorption potential of kenaf make it a suitable biomass material for use as an adsorbent. Kenaf has been used to remove various contaminants such as dyes (Mahmoud et al 2012), Cu (Hasfalina et al 2012), Cr (Borna et al 2016), rare earth elements (Rahman et al 2017), Ni (Hasfalina et al 2010), triclosan (Cho et al 2021), and fluoride (Yusof et al 2015) from aqueous solutions. In a previous study, fluoride adsorption using kenaf modified with N-trimethylammonium yielded a maximum adsorption capacity of 13.98 mg/g (Yusof et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Fluoride Adsorption on Aluminum-Impregnated Kenaf Biochar: Adsorption Characteristics and Mechanism

Choi

Lee

Park

2022

Water Air Soil Pollut

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The fast-growing plant kenaf was pyrolyzed to biochar, and the biochar was impregnated with aluminum to improve its fluoride adsorption capacity. The Al-impregnated kenaf biochar (Al-KNF-BC) was pyrolyzed at different temperatures (300-700 °C). The specimen treated at 300 °C (Al-KNF-300) showed the highest fluoride adsorption capacity. The kinetics and equilibrium adsorption of fluoride by Al-KNF-300 followed the pseudo-second-order and Langmuir models, respectively. According to the Langmuir model, the maximum fluoride adsorption capacity of Al-KNF-300 is 13.93 mg/g. The enthalpy and entropy of fluoride adsorption by Al-KNF-300 were 37.80 kJ/mol and 124.1 J/mol‧K, respectively. Fluoride adsorption by Al-KNF-300 was favorable at pH values as low as pH 3, and the effect of anion competition followed the order HCO 3 − > SO 4 2− > NO 3 − > Cl − . In experiments with different adsorbent dose, the maximum adsorption efficiency of 99.

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“…Activated carbons can play an important role in removing pharmaceutical compounds from the pharmaceutical industry, assuming that the concentration levels and physicochemical properties are similar to the reported for pesticides (Mohanty et al 2006;Kazner 2011). In this sense, the adsorption capacity of biochars derived from different materials is currently studied, resulting in high removal percentages of TCS (Wang and Wang 2019;Cho et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Removal of triclosan from water by adsorption on activated carbons and photodegradation

Castillo

González-Fernández

Ocampo-Pérez

et al. 2022

Preprint

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This work studied the application of adsorption with activated carbons (ACs) and photodegradation to reduce the concentration of triclosan (TCS) in aqueous solutions. Concerning the adsorption, the ACs (Darco, Norit, and F400) were characterized in detail, and batch experiments were applied to elucidate the effect of pH on the equilibrium. The results showed that at pH = 7, the maximum adsorption capacity of TCS onto the ACs was obtained, which was 18.5 mg g− 1 for Darco, 16.0 for Norit, and 15.5 for F400. The Diffusional kinetic model allowed an adequate interpretation of the experimental data. The effective diffusivity varied and increased along with the amount of TCS adsorbed, from 1.06 to 1.68×10− 8 cm2 s− 1. In the case of photodegradation, the removal percentage of TCS and sulfate radicals were verified. It was possible to ensure that the triclosan molecule was sensitive to UV light of 254 nm since the removal was over 80% using UV light. The removal of TCS was increased in the presence of sulfate radicals. It was possible to identify 2,4-dichlorophenol as one of the photolytic degradation products of triclosan, and it does not represent an environmental hazard at low concentrations of triclosan in water. These results confirm that the wastewater treatment methods proposed are effective for removing TCS from water, reaching levels of concentration that do not constitute a risk to human health or environmental hazard. Both methods effectively eliminate the pollutant with relatively easy techniques to implement.

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Removal of triclosan from aqueous solution via adsorption by kenaf‐derived biochar: Its adsorption mechanism study via spectroscopic and experimental approaches

Cited by 39 publications

References 99 publications

Carbon Black: A Good Adsorbent for Triclosan Removal from Water

Carbon Black: A Good Adsorbent for Triclosan Removal from Water

Enhanced Fluoride Adsorption on Aluminum-Impregnated Kenaf Biochar: Adsorption Characteristics and Mechanism

Removal of triclosan from water by adsorption on activated carbons and photodegradation

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