Emission characteristics and associated health risk assessment of volatile organic compounds from a typical coking wastewater treatment plant

Zhang, Yuxiu; Wei, Chaohai; Yan, Bo

doi:10.1016/j.scitotenv.2019.07.223

Cited by 72 publications

(17 citation statements)

References 49 publications

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“…In China, approximately 31.2 million tons of coking wastewater were produced from coal gas purification, coal coking, and the by-products recovery process of coking in 2017 [1]. Coking wastewater contains a large amount of organic pollutants, such as phenol and cyanide, which are highly toxic to both human and aquatic life even at low concentrations [2]. Therefore, it is critical to treat coking wastewater before it is discharged into the environment.…”

Section: Introductionmentioning

confidence: 99%

Application and Mechanism of Sludge-Based Activated Carbon for Phenol and Cyanide Removal from Bio-Treated Effluent of Coking Wastewater

Liu

Han

2020

Processes

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The toxic pollutants phenol and cyanide in the bio-treated effluent of coking wastewater still need advanced treatment to meet environmental requirements. In this study, activated carbon prepared from municipal sludge and bamboo waste (SBAC) was used for simultaneous adsorption of phenol and cyanide from bio-treated effluent of coking wastewater. The results showed that the optimum removal efficiencies of volatile phenol (69.7%) and total cyanide (80.1%) were observed at a SBAC dosage of 8 g/L, a pH value of 8.0, and a contact time of 80 min. The physical and chemical properties of SBAC were analyzed using Brunauer–Emmett–Teller (BET) surface area (SBET), scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) spectroscopy. SBAC had high SBET (289.58 m2/g) and rich mesoporous structure (average pore diameter of 3.688 nm), and carboxylic groups on SBAC surfaces were enhanced due to the addition of bamboo waste. In addition, a kinetic model of pseudo-first-order fitted well with the experimental data of volatile phenol, while the adsorption of total cyanide onto the SBAC was better described by a pseudo-second-order kinetic model.

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Section: Introductionmentioning

confidence: 99%

Application and Mechanism of Sludge-Based Activated Carbon for Phenol and Cyanide Removal from Bio-Treated Effluent of Coking Wastewater

Liu

Han

2020

Processes

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“…Results show that the concentrations of VOCs emitted from the raw wastewater tank were relatively high, especially for the benzene series. The raw wastewater tank was a main source of VOCs, because the VOC concentration in wastewater is one of the important influencing factors of VOC emissions, as shown in our previous work [45].…”

Section: Distribution Characteristics Of Atmospheric Vocsmentioning

confidence: 85%

Section: Distribution Characteristics Of Atmospheric Vocsmentioning

confidence: 99%

“…Physicochemical properties reflecting VOC volatility are boiling point, water solubility, the Henry coefficient (H c ), and vapor pressure. There is a certain correlation between gaseous VOC concentrations and boiling point, molecular weight, water solubility, H c , the log of the octanol-water partition coefficient, and steam pressure [45]. Considering the same chemical processes and conditions for the xylenes, and the concentration of o-xylene in wastewater was higher than that of m-xylene or p-xylene, o-xylene had the lowest gaseous concentration because of lower volatility and higher solubility [46].…”

Section: Distribution Characteristics Of Atmospheric Vocsmentioning

confidence: 99%

“…Other categories are classified due to their concentrations at low levels. It can be seen from the previous work that VOC emissions from wastewater into the air are positively correlated with VOC concentrations in the wastewater, and physicochemical properties and treatment technologies are important factors in VOC removal [45]. classification number.…”

Section: Cluster Analysismentioning

confidence: 99%

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Distribution Characteristics of Volatile Organic Compounds and Contribution to Ozone Formation in a Coking Wastewater Treatment Plant

Zhang

Zang

Yan

et al. 2020

IJERPH

Self Cite

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Ozone pollution, which can be caused by photochemical reactions, has become a serious problem. The ozone formation potential (OFP) is used to describe the photochemical reactivity. Volatile organic compounds (VOCs) are main precursors of ozone formation, and wastewater treatment plants (WWTPs) are important sources of VOCs. Therefore, it is necessary to study the concentration level and OFP of VOCs from WWTPs. In this work, a coking WWTP with anaerobic-oxic-oxic (A/O/O) processes in Shaoguan city, Guangdong province, China, was selected to investigate the characteristics of VOCs at wastewater treatment areas and office areas. The OFP of VOCs was estimated by the maximum incremental reactivity (MIR) coefficient method. Results showed that 17 VOCs were detected, and the total concentration of VOCs was the highest at the raw water tank (857.86 μg m−3). The benzene series accounted for 69.0%–86.9% and was the main component of VOCs in the WWTP. Based on OFP data, the top six VOCs contributing most to the OFP were m-xylene, toluene, p-xylene, o-xylene, styrene, and benzene. This study provides field data and information on the environmental risk of VOCs for coking companies and environmental departments. We found that the priority control sources of VOCs were wastewater treatment units because of their larger OFP contributions.

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Industrial Wastewater Contaminants and Their Hazardous Impacts

Pereira

Goldenstein

Bassin

2021

Biosorption for Wastewater Contaminants

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Emission characteristics and associated health risk assessment of volatile organic compounds from a typical coking wastewater treatment plant

Cited by 72 publications

References 49 publications

Application and Mechanism of Sludge-Based Activated Carbon for Phenol and Cyanide Removal from Bio-Treated Effluent of Coking Wastewater

Application and Mechanism of Sludge-Based Activated Carbon for Phenol and Cyanide Removal from Bio-Treated Effluent of Coking Wastewater

Distribution Characteristics of Volatile Organic Compounds and Contribution to Ozone Formation in a Coking Wastewater Treatment Plant

Industrial Wastewater Contaminants and Their Hazardous Impacts

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