Adsorptive removal of adsorbable organic halogens by activated carbon

Qin, Chengrong; Liu, Baojie; Huang, Lingzhi; Liang, Chen; Gao, Cong; Yao, Shuangquan

doi:10.1098/rsos.181507

Cited by 14 publications

(12 citation statements)

References 36 publications

(46 reference statements)

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“…Activated carbon, a highly multi-porous structure material with large developed surface area, is without doubt an amazing material that has been widely explored either on its own or as a composite material for many decades. Owing to the fascinating structural properties, activated carbon is suitable for various applications, including water purification [1], stem cell growth [2], catalyst support [3], storage, separation and purification of gases [3,4], drug delivery [5], and as electrodes of super capacitors. Since most of the activated carbons are pyrogenic carbonaceous materials, they are prepared by thermochemical conversions and the use of some chemicals such as NaOH, ZnCl, can lead to secondary pollution.…”

Section: Introductionmentioning

confidence: 99%

Innovative Activated Carbon Based on Deep Eutectic Solvents (DES) and H3PO4

Pam

2019

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In this present work, a novel method for synthesis of palm kernel shell activated carbon was established using DES (choline chloride/urea)/H3PO4 as the activating agent. The pore characterization, morphology, and adsorption properties of the activated carbons were investigated. The activated carbon samples made from the same feedstock at two pyrolysis temperatures (500 and 600 °C) were compared for their ability to adsorb Pb(II) in aqueous solution. The results demonstrated that the production of the activated carbon and adsorptive properties were significantly influenced by the pyrolysis temperature and the ratio of precursor to activating agent. DES/H3PO4 activated carbon (having surface area 1413 m2/g and total pore volume 0.6181 cm3/g) demonstrated good Pb(II) removal. Although all the tested activated carbon samples adsorbed Pb(II) from aqueous solution, they demonstrated different adsorption capabilities according to their various properties. The pyrolysis temperature, however, showed little influence on the activated carbon adsorption of Pb(II) when compared to the impregnation ratio. Their good desorption performance perhaps resulted from the porous structure.

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Section: Introductionmentioning

confidence: 99%

Innovative Activated Carbon Based on Deep Eutectic Solvents (DES) and H3PO4

Pam

2019

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“…Absorbable organic halogens (AOX) are one of the most persistent organic pollutants. Their concentration must be controlled in liquid waste due to adverse environmental impacts (Lohmann et al 2007;Qin et al 2018), and many countries have set a limit for their concentration in wastewater streams; consequently, their analysis in the leachate is essential (Balabanič et al 2017;Xie et al 2018). The Fenton-like process over ZrCu, carried out under conventional conditions (reaction condition: 70 °C, pH 5, catalyst dose 200 mg/L, H 2 O 2 dose 30 mL/L, and reaction time 150 min), achieved a reduction of 51% of AOX (Fig.…”

Section: Analysis Of the Qualitative Efficacy Of The Fenton-like Processmentioning

confidence: 99%

Abatement of the ecotoxicological risk of landfill leachate by heterogeneous Fenton-like oxidation

Hussain

Aneggi

Comuzzi

et al. 2022

Environ Sci Pollut Res

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Landfill leachates are highly contaminated liquid waste, and their treatment and detoxification are a challenging task. The current system of ecotoxicological risk assessment is complex and time-consuming. It is of fundamental importance to develop simpler and faster tools for the evaluation of the treated liquid waste and for an easier preliminary screening of the most active catalytic formulation/reaction conditions of the Fenton-like process. Here, several analytical techniques have been used for the assessment of the reduction of toxicity of the landfill leachate after Fenton process over copper-zirconia catalyst (ZrCu). Ultraviolet–visible (UV–vis) spectroscopy and absorbable organic halogens (AOX) analysis have been coupled to achieve further insight into the degradation of contaminants. In addition, for the first time, the qualitative abatement of organic compounds is monitored through proton nuclear magnetic resonance (1H NMR) analysis, providing a new method for evaluating the effectiveness of the treatment. Spectroscopic techniques reveal that the Fenton process induces a significant abatement of the aromatic and halogen compounds (51%) in the landfill leachate with a reduction of the toxicity that has been confirmed by ecotoxicological test with algae. These results validate the investigated tool for a simple rapid preliminary evaluation of the detoxification efficacy.

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“…Conventional wastewater treatment processes are often insufficient for realizing complete AOX removal [5]. Therefore, several other removal techniques have been proposed in the literature, including adsorption [5,6], biological treatment [7][8][9], nano and ultrafiltration [10,11], and advanced oxidation processes (AOPs). AOPs employ the production of highly reactive radicals (hydroxyl radicals, *OH) to eliminate target substances through oxidation.…”

Section: Introductionmentioning

confidence: 99%

Predicting Residual Adsorbable Organic Halides Concentrations in Industrial Wastewater Using Typical Wastewater Parameters

Milh

Eyck

Bastiaens

et al. 2020

Water

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The aim of this study was to predict the residual adsorbable organic halides (AOX) concentration in an industrial wastewater using conventional, easy-to-measure wastewater parameters. In a pilot test unit, the wastewater was subjected to ozonation at various intensities, resulting in an AOX-removal and hence varying AOX concentrations. In first instance, the parameters used for modeling were selected using Pearson and Spearman correlations. Secondly, multiple linear regression (MLR) was used as a modeling tool to predict both the soluble and total AOX concentration in wastewater samples. To prevent overfitting, a 10-fold cross-validation was carried out. It was found that both the soluble and the total AOX concentration can be predicted using typical wastewater parameters. The measured parameters were pH, chloride concentration, Water-Soluble Organic Carbon concentration (WSOC), UV-VIS spectrum, turbidity, and Solids Removable by Filtration (SRF). Out of these parameters, the following parameters were found to be significant for prediction of the total AOX concentration: turbidity; SRF; UV-VIS absorbance at 200; 227, and 250 nm; and pH. UV-VIS absorbance at 200 and 227 nm and turbidity of the wastewater were found to contribute significantly to the final model. For the soluble AOX concentration, the significant parameters were turbidity; SRF; absorbance at 200, 227, and 250 nm; pH, and chloride concentration. Here, UV-VIS absorbance at 200 and 227 nm were found to contribute significantly to the final model. The obtained final models had an adjusted R2 of 0.921 and 0.916 for the total and soluble AOX, respectively. As a result of the obtained models, both AOX concentrations can be predicted using parameters that are easier to determine. This allows for a significant reduction in wastewater sampling and analysis time and offers the opportunity to optimize the ozone dosing in the wastewater treatment process in the future.

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Adsorptive removal of adsorbable organic halogens by activated carbon

Cited by 14 publications

References 36 publications

Innovative Activated Carbon Based on Deep Eutectic Solvents (DES) and H3PO4

Innovative Activated Carbon Based on Deep Eutectic Solvents (DES) and H3PO4

Abatement of the ecotoxicological risk of landfill leachate by heterogeneous Fenton-like oxidation

Predicting Residual Adsorbable Organic Halides Concentrations in Industrial Wastewater Using Typical Wastewater Parameters

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