Adsorption of para chloro meta xylenol (PCMX) in composite adsorbent beds: Parameter estimation using nonlinear least square technique

Sadhukhan, Suvra; Singha, Somdutta; Sarkar, Ujjaini

doi:10.1016/j.cej.2009.04.071

Cited by 22 publications

(3 citation statements)

References 14 publications

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“…The harmful impact of chloroxylenol on the natural environment has caused the development of effective approaches for its elimination from WWTPs with the use of physicochemical and biological methods. For the elimination of chlorophenols, including PCMX, many common physicochemical approaches have been applied, including an advanced oxidation process with the use of ozonation, ultraviolet irradiation and thermally activated persulfate [ 17 , 18 , 19 , 20 , 21 ]. Despite the high efficiency of elimination and short-term treatment, there are some disadvantages, including the cost, the use of numerous chemical solvents, and the formation of harmful by-products.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of Chloroxylenol by Cunninghamella elegans IM 1785/21GP and Trametes versicolor IM 373: Insight into Ecotoxicity and Metabolic Pathways

Nowak

Zawadzka

Szemraj

et al. 2021

IJMS

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Chloroxylenol (PCMX) is applied as a preservative and disinfectant in personal care products, currently recommended for use to inactivate the SARS-CoV-2 virus. Its intensive application leads to the release of PCMX into the environment, which can have a harmful impact on aquatic and soil biotas. The aim of this study was to assess the mechanism of chloroxylenol biodegradation by the fungal strains Cunninghamella elegans IM 1785/21GP and Trametes versicolor IM 373, and investigate the ecotoxicity of emerging by-products. The residues of PCMX and formed metabolites were analysed using GC-MS. The elimination of PCMX in the cultures of tested microorganisms was above 70%. Five fungal by-products were detected for the first time. Identified intermediates were performed by dechlorination, hydroxylation, and oxidation reactions catalysed by cytochrome P450 enzymes and laccase. A real-time quantitative PCR analysis confirmed an increase in CYP450 genes expression in C. elegans cells. In the case of T. versicolor, spectrophotometric measurement of the oxidation of 2,20-azino-bis (3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) showed a significant rise in laccase activity during PCMX elimination. Furthermore, with the use of bioindicators from different ecosystems (Daphtoxkit F and Phytotoxkit), it was revealed that the biodegradation process of PCMX had a detoxifying nature.

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Section: Introductionmentioning

confidence: 99%

Biodegradation of Chloroxylenol by Cunninghamella elegans IM 1785/21GP and Trametes versicolor IM 373: Insight into Ecotoxicity and Metabolic Pathways

Nowak

Zawadzka

Szemraj

et al. 2021

IJMS

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“…Treatment of pharmaceutical wastewater by adsorption with activated carbon is executed by various researchers [1][2][3][4]. Activated carbon is known as the most commonly used adsorbent for wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

Application of an Alkali Functionalized Material for Treating Pharmaceutical Wastewater Containing Chlorhexidine Gluconate and Cetrimide

Banerjee

Jana

Sarkar

et al. 2015

CLEAN Soil Air Water

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Two different types of mesoporous adsorbents and one microporous adsorbent were used for the adsorption of chlorhexidine gluconate and Cetrimide. Chlorhexidine gluconate and Cetrimide are widely used in antiseptic solutions, mouthwashes, and germicidal hand rinses, etc. Scanning electron microscopy images, N2 adsorption/desorption isotherms, pore size distribution, Fourier transform infrared spectra and points of zero charge illustrate that significant changes occur on the activated carbon after functionalization with NH4OH when compared to the precursor granular activated carbon (GAC). The adsorption capacity of the novel alkali functionalized activated carbon (FAC‐NH3) was found to be comparable with the highly expensive mesoporous aluminosilicate MCM‐41 for both chlorhexidine gluconate and cetrimide. For a wide concentration range, adsorption with FAC‐NH3 is approximately three times more in comparison to GAC for both compounds. Chlorhexidine gluconate forms surface complexes with the functional groups present in the super microporous FAC‐NH3. This fact is also supported by kinetic studies, where pseudo first‐order and second‐order models, intra‐particle diffusion, and Boyd's plots showed evidences to support chemisorption, on top of pure physical adsorption.

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“…Organic compounds are common pollutants of wastewaters derived from many industries such as pesticides industries, dyes, tanning, textile, plastic, rubber, paper and pulp manufacturing, petrochemical and petroleum refineries [1][2][3]. Cresols are very toxic to human and animal life and resistant to biodegradation.…”

mentioning

confidence: 99%

Adsorption of p-Cresol by Mesoporous Activated Carbon. II. Mechanism studies and data modeling

Neagu¹,

Popovici²,

Vîjan³

et al. 2017

Rev. Chim.

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In this work, the adsorption mechanism of p-cresol from aqueous solution onto mesoporous activated carbon was investigated. The mechanism of the adsorption process was determined from Weber-Morris and Boyd models. By graphical and statistical analysis was demonstrated that both film-diffusion and intra-particle diffusion are concurrent in adsorption mechanism. The adsorption mechanism of p-cresol onto mesoporous activated carbon was sustained by FTIR analysis, Boehm titration and the point of zero charge of the GAC.

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Adsorption of para chloro meta xylenol (PCMX) in composite adsorbent beds: Parameter estimation using nonlinear least square technique

Cited by 22 publications

References 14 publications

Biodegradation of Chloroxylenol by Cunninghamella elegans IM 1785/21GP and Trametes versicolor IM 373: Insight into Ecotoxicity and Metabolic Pathways

Biodegradation of Chloroxylenol by Cunninghamella elegans IM 1785/21GP and Trametes versicolor IM 373: Insight into Ecotoxicity and Metabolic Pathways

Application of an Alkali Functionalized Material for Treating Pharmaceutical Wastewater Containing Chlorhexidine Gluconate and Cetrimide

Adsorption of p-Cresol by Mesoporous Activated Carbon. II. Mechanism studies and data modeling

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