Application of Biochar for Treating the Water Contaminated with Polar Halogenated Organic Pollutants

Kamenická, Barbora; Matějíček, Pavel; Weidlich, Tomáš; Pohořelý, Michael

doi:10.5772/intechopen.92760

Cited by 3 publications

(18 citation statements)

References 20 publications

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“…For comparison of structure dependence of these substances, the R 4 NX with different numbers of long alkyl chains bound to the quaternary ammonium nitrogen were scrutinized (structural drawings of R 4 NXs, Figure S1 in Supplementary Materials). These experiments were performed using model solutions of MB9 simulating industrial wastewater from the production of acid azo dyes [27,28].…”

Section: Separation Of Mb9 Using Ils Based On R 4 Nxsmentioning

confidence: 99%

Separation of Anionic Chlorinated Dyes from Polluted Aqueous Streams Using Ionic Liquids and Their Subsequent Recycling

Kamenická,

Švec,

Weidlich

2023

IJMS

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The effect of ionic liquids on the separation of chlorinated anionic dyes such as Mordant Blue 9 (MB9) or Acid Yellow 17 (AY17) via ion exchange has been investigated in model aqueous solutions that simulate wastewater from the textile dyeing industry. The effect of ionic liquids chemical nature on the separation efficiency of mentioned dyes has been compared. It was found that especially ionic liquid based on quaternary ammonium salts comprising two or three long alkyl chains bound to the quaternary ammonium nitrogen (typically benzalkonium chloride or Aliquat 336) are very effective for the separation of both studied MB9 and AY17 from aqueous solution. In addition, the innovative technique has been developed for the reactivation of spent ionic liquids which is based on the chemical reduction of the formed ion pairs using NaBH4/NiSO4, NaBH4/Na2S2O5 or Raney Al-Ni alloy/NaOH. Thus, only NaBH4/NiSO4 in co-action with Al-Ni alloy enables both effective reduction of the azo bond and subsequent hydrodechlorination of emerging chlorinated aromatic amines. The efficiency of tested dyes separation or regeneration of ion pairs was evaluated by determination of the absorbance at wavelength of the maximum absorbance, of the Chemical Oxidation Demand (COD), and of the Adsorbables Organically bound Halogens (AOX). The formation of ion pairs or products of reduction and hydrodechlorination of these ion pairs has been studied using the 1H NMR and LC-MS techniques.

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Section: Separation Of Mb9 Using Ils Based On R 4 Nxsmentioning

confidence: 99%

Separation of Anionic Chlorinated Dyes from Polluted Aqueous Streams Using Ionic Liquids and Their Subsequent Recycling

Kamenická,

Švec,

Weidlich

2023

IJMS

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“…For a detailed description of the BC sample, see our previous work in ref. [32]. The brief specification of sorption materials is given in Table 1.…”

Section: Sorbentsmentioning

confidence: 99%

“…As can be seen, BC enables even better removal efficiency of RB8 than commercial MTM. Again, it can be caused by the much higher specific surface area of BC compared with clay-based sorbents BT or MTM [27,29,32,36,46]. Despite the efficient adsorption of RB8 on PAC, an alternative and cheaper sorbent BC is a good compromise for expensive PAC [21].…”

Section: Removal Of Rb8 From Model Wastewater By Sorptionmentioning

confidence: 99%

“…Despite several different applications of BC and BT (in agriculture, construction industry, etc. ), many authors have previously published options for the adsorption of different types of dyes on BC [32][33][34][35] as well as on BT [27,29,[36][37][38]. However, BC and BT provided lower adsorption capacities and removal efficiencies (in comparison with AC action) [32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

“…The applicable improvement of removal efficiencies serves the co-action of BC or BT together with appropriate ionic liquids (ILs) [32,38]. ILs are usually defined as compounds completely composed of ions with melting points below 100 • C [39].…”

Section: Introductionmentioning

confidence: 99%

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Co-Action of Ionic Liquids with Alternative Sorbents for Removal of Reactive Azo Dyes from Polluted Wastewater Streams

Kamenická,

Maňásková,

Pouzar

et al. 2024

Applied Sciences

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In this study, the facile removal of the chromium-complex-based reactive azo dye C. I. Reactive Black 8 (RB8) from model wastewaters by the co-action of alternative sorbents—biochar (BC) and bentonite (BT)—with ionic liquids such as benzalkonium chloride (BAC) or Aliquat 336 (A336) was studied. The experiments using model RB8-containing wastewater proved that the co-action of BAC with BC is the most promising method of RB8 separation from wastewater containing 1 g L–1 of RB8 dye. The application of 2 g L–1 BC in co-action with 1.5 g L–1 BAC or 1 g L–1 BT in co-action with 2 g L–1 BAC enables the removal of more than 98% of contaminant RB8 after 30 min of action. Similar removal efficiency (RE) was achieved using 40 g L–1 of powdered activated carbon (PAC) after 180 min of action. To reach the same RE using real RB8-containing wastewater, a four times higher dose of BC and a four times higher dose of BAC per gram of removed RB8 were required. The proposed mechanism of RB8 removal by the co-action of alternative sorbents with BAC comprises a parallel effect of (i) sorption, (ii) the formation of less polar ion pairs accompanied by their sorption on an alternative sorbent and (iii) the separation of used alternative sorbents covered with ion pairs. The removal efficiency of organic contaminant(s) from both model and real wastewater was evaluated by VIS spectroscopy applying the Lambert–Beer law and by the determination of chemical oxidation demand (COD) and/or adsorbable organically bound halogen (AOX) parameters.

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Sorption of Halogenated Anti-Inflammatory Pharmaceuticals from Polluted Aqueous Streams on Activated Carbon: Lifetime Extension of Sorbent Caused by Benzalkonium Chloride Action

Kamenická,

Weidlich,

Pouzar

2023

Water

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The enhancement of the adsorption capacity of activated carbon (AC) using benzalkonium chloride (BAC) within the adsorption of halogenated pharmaceuticals flufenamic acid (flufa) and diclofenac (dcf) was investigated in this study. An adsorption kinetic study was performed to evaluate the adsorption mechanisms. The adsorption mechanism of both drugs on granulated AC as well as saturated AC activated by BAC can be evaluated via pseudo-second kinetic order. The equilibrium adsorption capacity of spent granulated AC in co-action with BAC (qflufa = 195.5 mg g−1 and qdcf = 199.5 mg g−1) reached the adsorption capacity of virgin granulated AC (qflufa = 203.9 mg g−1 and qdcf = 200.7 mg g−1). Finally, batch and column arrangements were compared in an effort to possible practical application of exhausted AC in co-action with BAC. In both column and batch experiments, adsorption capacities of spent granulated AC for flufa increased using BAC by 170.4 mg g−1 and 560.4 mg g−1, respectively. The proposed mechanism of adsorption enhancement is the formation of less polar ion pairs and its better affinity to the non-polar AC surface. The drug concentrations were determined using the voltammetric method on carbon paste electrodes. The formation of ion pairs has been studied by the H1 NMR technique, and solubility in water of drugs and respective ion pairs were investigated using octan-1-ol/water coefficients (POW).

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Application of Biochar for Treating the Water Contaminated with Polar Halogenated Organic Pollutants

Cited by 3 publications

References 20 publications

Separation of Anionic Chlorinated Dyes from Polluted Aqueous Streams Using Ionic Liquids and Their Subsequent Recycling

Separation of Anionic Chlorinated Dyes from Polluted Aqueous Streams Using Ionic Liquids and Their Subsequent Recycling

Co-Action of Ionic Liquids with Alternative Sorbents for Removal of Reactive Azo Dyes from Polluted Wastewater Streams

Sorption of Halogenated Anti-Inflammatory Pharmaceuticals from Polluted Aqueous Streams on Activated Carbon: Lifetime Extension of Sorbent Caused by Benzalkonium Chloride Action

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