Removal of recalcitrant organics in reverse osmosis concentrate from coal chemical industry by UV/H2O2 and UV/PDS: Efficiency and kinetic modeling

Li, Wentao; Zhang, Miao; Wang, Hui; Lian, Junfeng; Qiang, Zhimin

doi:10.1016/j.chemosphere.2021.131999

Cited by 12 publications

(3 citation statements)

References 53 publications

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“…Actually, the possibility of recovery, regeneration and reuse of the active phase in decontamination procedures is a fundamental parameter to define their sustainability. This aspect has been stressed in many studies and is highlighted in Table 1 (entries 1, 6-10, 13,14,16,17,22).…”

Section: Considerations On Chemical Compositions and Stabilitymentioning

confidence: 97%

“…The methods based on the use/production of hydrogen peroxide and related ROS are mainly founded on the following reactions (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19) [8,17,21,22,40]. Equation ( 1) is related to ozone-related systems, Equations ( 2)- (6) to the peroxone (O 3 /H 2 O 2 ) system, Equations ( 5)- (11) to photolysis and photocatalytic (hν)/thermocatalytic (∆T) reactions in the presence of a heterogeneous catalyst ("Cat."…”

Section: Introductionmentioning

confidence: 99%

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An Overview of Environmental Catalysis Mediated by Hydrogen Peroxide

Rigoletto,

Laurenti,

Tummino

2024

Catalysts

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The use of hydrogen peroxide (produced in situ or ex situ) as the main agent in oxidative processes of environmental pollutant removal is widely studied. The degradation of water pollutants, such as dyes, pharmaceuticals, cosmetics, petroleum derivatives, and even pathogens, has been successfully obtained by different techniques. This review gives an overview of the more recent methods developed to apply oxidative processes mediated by H2O2 and other reactive oxygen species (ROS) in environmental catalysis, with particular attention to the strategies (Fenton-like and Bio-Fenton, photo- and electro-catalysis) and the materials employed. A wide discussion about the characteristics of the materials specifically studied for hydrogen peroxide activation, as well as about their chemical composition and morphology, was carried out. Moreover, recent interesting methods for the generation and use of hydrogen peroxide by enzymes were also presented and their efficiency and applicability compared with the Fenton and electro-Fenton methods discussed above. The use of Bio-Fenton and bi-enzymatic methods for the in situ generation of ROS seems to be attractive and scalable, although not yet applied in full-scale plants. A critical discussion about the feasibility, criticalities, and perspectives of all the methods considered completes this review.

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Section: Considerations On Chemical Compositions and Stabilitymentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

An Overview of Environmental Catalysis Mediated by Hydrogen Peroxide

Rigoletto,

Laurenti,

Tummino

2024

Catalysts

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“…Pollution problems associated with CCI need to be urgently addressed, as coal is used to produce energy in a variety of industrial processes [2]. Environmental problems related to CCI sites can be roughly divided into three categories: (1) gaseous waste production, including CO 2 , a greenhouse gas [3,4], methanol [5], and coke oven gas [6]; (2) wastewater production, including coking wastewater [7] and high-salt wastewater [7][8][9][10][11][12]; and (3) soil pollutants, including soil PAHs [13][14][15] and heavy metals [16,17]. Among the three types of CCI pollution, pollution of soil, which is the ultimate receptor of all types of pollutants, is characterized by long contamination times and complex environmental media, and the remediation technologies for soil pollution are underdeveloped.…”

Section: Introductionmentioning

confidence: 99%

An Assessment Framework for Human Health Risk from Heavy Metals in Coal Chemical Industry Soils in Northwest China

Wang,

Zhao,

et al. 2023

Sustainability

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Coal chemical industry (CCI) sites are characterized by complex environmental media, combined heavy metal pollution, and diverse exposure routes. However, existing human health risk assessment (HHRA) methods have multiple drawbacks, such as their small scope of application, limited assessment factors, and insufficient case applications. After 128 soil samples were collected, the contents of Be, V, Ni, Cu, Zn, As, Cd and Hg in the soils were analyzed based on general risk assessment guideline of China. Then, risk levels were calculated based on oral ingestion, skin contact and inhalation as the main exposure routes to compare and screen priority heavy metals. Furthermore, control values were identified through a contribution rate calculation model when CR > 10−6 or HQ > 1. As reference values, risk thresholds were proposed for heavy metals, and then a soil HHRA framework for the CCI site was constructed. Under the three exposure routes, the total CR was As > 10−6, and the total HQ was 1 > As > Cd; the HHRs related to As and V via the oral ingestion, dermal contact, and inhalation pathways were 76.67%, 13.13%, and 10.18% and 1.66%, 0, and 98.34%, respectively. The risk control value of As was 1.59 mg/kg and that of V was 25.1 mg/kg. Based on these results, the threshold values for priority heavy metals should be based on comprehensive considerations of the elemental background of a specific area, the contaminant criteria in different areas, the regional industrial development plan, and the most important control criterion, as well as the control value. Through the development of an HHRA framework and case verification, the authors of this article aim to guide CCI managers in screening priority heavy metals, formulating protection measures, developing improved operational procedures and improving the HHRA system for polluted CCI sites.

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