Intensified phenols extraction and oil removal for industrial semi-coking wastewater: A novel economic pretreatment process design

Chen, Bokun; Yang, Siyu; Yangyang, Wu; Suo, Miyangzi; Qian, Yu

doi:10.1016/j.jclepro.2019.118453

Cited by 31 publications

(14 citation statements)

References 12 publications

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“…13 However, the extraction efficiency is largely restricted in alkaline or even neutral conditions due to the ionization of phenols, which causes high consumption of organic solvents and energy. 16 Besides, the extraction performance is barely satisfactory in treating most of the common phenolic wastewater with a relatively low concentration of phenols. 17 Electrocatalytic hydrogenation (ECH) is an emerging technique in the chemical industry, where the unsaturated bonds (e.g., CC and CO) are hydrogenated by the in situ generated reductive hydrogen species under mild conditions.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Phenolic pollutants are common organics in wastewater at high concentrations and can be released by many industries, including coal chemical, oil refinery, and pharmaceutical industries. − The removal of phenol and its derivatives with different functional groups (e.g., chlorophenol and methylphenol) from wastewater has long been recognized as a research hotspot because of their high toxicity and large discharge quantities. , For the treatment of wastewater with an extremely high concentration of phenols (e.g., >1000 mg L –1 ), solvent extraction has been regarded as an effective approach, where water remediation and phenols recovery can be realized simultaneously . However, the extraction efficiency is largely restricted in alkaline or even neutral conditions due to the ionization of phenols, which causes high consumption of organic solvents and energy . Besides, the extraction performance is barely satisfactory in treating most of the common phenolic wastewater with a relatively low concentration of phenols …”

Section: Introductionmentioning

confidence: 99%

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Simultaneous Phenol Removal and Resource Recovery from Phenolic Wastewater by Electrocatalytic Hydrogenation

Zhang

et al. 2022

Environ. Sci. Technol.

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Efficient pollutants removal and simultaneous resource recovery from wastewater are of great significance for sustainable development. In this study, an electrocatalytic hydrogenation (ECH) approach was developed to selectively and rapidly transform phenol to cyclohexanol, which possesses high economic value and low toxicity and can be easily recovered from the aqueous solution. A three-dimensional Ru/TiO 2 electrode with abundant active sites and massive microflow channels was prepared for efficient phenol transformation. A pseudo-first-order rate constant of 0.135 min −1 was observed for ECH of phenol (1 mM), which was 34-fold higher than that of traditional electrochemical oxidation (EO). Both direct electron transfer and indirect reduction by atomic hydrogen (H*) played pivotal roles in the hydrogenation of phenol ring. The ECH technique also showed excellent performance in a wide pH range of 3−11 and with a high concentration of phenol (10 mM). Moreover, the functional groups (e.g., chloro-and methyl-) on phenol showed little influence on the superiority of the ECH system. This work provides a novel and practical solution for remediation of phenolic wastewater as well as recovery of valuable organic compounds.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simultaneous Phenol Removal and Resource Recovery from Phenolic Wastewater by Electrocatalytic Hydrogenation

Zhang

et al. 2022

Environ. Sci. Technol.

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“…There has been an increase in applications of acridine, a typical nitrogenous heterocyclic compound, in different industries, such as dyes, pharmaceuticals, coking, and pesticides, 1,2 due to its good biological activity and particular functional unit. Nowadays, more and more wastewater containing acridine has been discharged into the environment.…”

Section: Introductionmentioning

confidence: 99%

Co-immobilized bienzyme of horseradish peroxidase and glucose oxidase on dopamine-modified cellulose–chitosan composite beads as a high-efficiency biocatalyst for degradation of acridine

Yuan

et al. 2022

RSC Adv.

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“…It comprises numerous refractory and highly toxic pollutants, including benzene series, phenols, polycyclic aromatic hydrocarbons, nitrogen-oxygen, and sulfur-oxygen heterocyclic compounds, as well as inorganic pollutants such as heavy metals (Dargahi et al, 2021;Ding et al, 2021;Gao et al, 2022). The water quality of the wastewater is similar to that of coking wastewater, but the COD concentration of semi-coking wastewater is approximately 10 times higher, and the concentrations of ammonia nitrogen and phenols are also significantly higher than coking wastewater (Bokun et al, 2020). Semi-coking wastewater is the most harmful type of wastewater due to its high COD and high toxicity (Ma et al, 2017;Zhou et al, 2017;Li et al, 2020).…”

Section: Introductionmentioning

confidence: 93%

Self-doped N, S porous carbon from semi-coking wastewater-based phenolic resin for supercapacitor electrodes

Yan

Wang²,

Wang³

et al. 2022

Front. Chem.

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Contamination of phenolic compounds has devastating effects on the environment. Therefore, its harmless treatment and recycling have received extensive attention. Herein, a novel method for preparing N-S doped phenolic resin (NSPR) from phenols, N and S groups in semi-coking wastewater, and formaldehyde are developed. The KOH is consequently incorporated into the NSPR through simultaneous carbonization and activation in a single step to produce porous carbon material (NSPC). The as-obtained NSPC exhibits a high specific capacitance of 182 F g−1 at 0.5 A g−1, a high energy density of 9.1 Wh kg−1 at a power density of 0.15 kW kg−1, and remarkable cycling stability in aqueous KOH electrolyte. This outstanding electrochemical performance is attributed to its ultrahigh specific surface area (SSA, 2,523 m2 g−1), enormous total pore volume (Vt, 1.30 cm3 g−1), rational pore structure, and N-S heteroatom self-doping (0.76 at% N and 0.914 at% S), which ensures adequate charge storage, rapid electrolyte ion diffusion, and contributed pseudo-capacitance. This work not only provides a facile method for transforming phenolic wastewater into high-value products but also offers a cost-effective and high-performance porous carbon material for supercapacitors.

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Intensified phenols extraction and oil removal for industrial semi-coking wastewater: A novel economic pretreatment process design

Cited by 31 publications

References 12 publications

Simultaneous Phenol Removal and Resource Recovery from Phenolic Wastewater by Electrocatalytic Hydrogenation

Simultaneous Phenol Removal and Resource Recovery from Phenolic Wastewater by Electrocatalytic Hydrogenation

Co-immobilized bienzyme of horseradish peroxidase and glucose oxidase on dopamine-modified cellulose–chitosan composite beads as a high-efficiency biocatalyst for degradation of acridine

Self-doped N, S porous carbon from semi-coking wastewater-based phenolic resin for supercapacitor electrodes

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