Cutting down on the ozone and SOA formation as well as health risks of VOCs emitted from e-waste dismantlement by integration technique

Liu, Ranran; Chen, Jiangyao; Li, Guiying; Wang, Xinming; An, Taicheng

doi:10.1016/j.jenvman.2018.07.034

Cited by 24 publications

(4 citation statements)

References 55 publications

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“…Many of the harmful VOCs are derived from anthropogenic activities such as the burning of fuels, leakage of harmful gases, industrial sewage discharge, e-waste, etc. [ 38 ]. Some of the common sources of harmful VOCs include formaldehyde, BTEX (benzene, toluene, ethylbenzene, and xylene), PAH (polycyclic aromatic hydrocarbon), styrene, tetrachloroethylene (used in dry cleaning), ethylene glycol, methylene chloride (used as paint stripper), 1,3-butadiene, 1,8-cineole, vinyl chloride, acetone, carbon tetrachloride, isopropylbenzene, undecane, etc.…”

Section: Volatile Organic Compoundsmentioning

confidence: 99%

Recent Progress in Metal–Organic Framework-Derived Nanostructures in the Removal of Volatile Organic Compounds

et al. 2021

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Air is the most crucial and life-supporting input from nature to the living beings of the planet. The composition and quality of air significantly affects human health, either directly or indirectly. The presence of some industrially released gases, small particles of anthropogenic origin, and the deviation from the normal composition of air from the natural condition causes air pollution. Volatile organic compounds (VOCs) are common contaminants found as indoor as well as outdoor pollutants. Such pollutants represent acute or chronic health hazards to the human physiological system. In the environment, such polluted gases may cause chemical or photochemical smog, leading to detrimental effects such as acid rain, global warming, and environmental pollution through different routes. Ultimately, this will propagate into the food web and affect the ecosystem. In this context, the efficient removal of volatile organic compounds (VOCs) from the environment remains a major threat globally, yet satisfactory strategies and auxiliary materials are far from being in place. Metal–organic frameworks (MOFs) are known as an advanced class of porous coordination polymers, a smart material constructed from the covalently bonded and highly ordered arrangements of metal nodes and polyfunctional organic linkers with an organic–inorganic hybrid nature, high porosities and surface areas, abundant metal/organic species, large pore volumes, and elegant tunability of structures and compositions, making them ideal candidates for the removal of unwanted VOCs from air. This review summarizes the fundamentals of MOFs and VOCs with recent research progress on MOF-derived nanostructures/porous materials and their composites for the efficient removal of VOCs in the air, the remaining challenges, and some prospective for future efforts.

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Section: Volatile Organic Compoundsmentioning

confidence: 99%

Recent Progress in Metal–Organic Framework-Derived Nanostructures in the Removal of Volatile Organic Compounds

et al. 2021

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“…By contrast, adsorption-based approaches typically require ancillary steps to ensure environmentally benign and cost-effective management (e.g., cyclic regeneration of spent adsorbents). ,, Adsorbed pollutants released during the regeneration step require additional equipment to manage secondary pollution. If a thermal treatment is utilized for sorbent regeneration, the adsorbed parent pollutant molecules may disintegrate into smaller compounds that require further (or additional) treatment steps. − …”

Section: General Photocatalytic Principlesmentioning

confidence: 99%

Photocatalytic Platforms for Removal of Ammonia from Gaseous and Aqueous Matrixes: Status and Challenges

et al. 2020

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The unbridled expansion of advanced agricultural and industrial facilities has led to the release of large amounts of ammonia (NH 3 ), one of the most pernicious malodorants. Photocatalytic approaches have attracted widespread attention as promising options to turn pollutants into environmentally benign end products under favorable operating conditions. Although most approaches rely on the titanium dioxide (TiO 2 ) structures, many other engineered photocatalytic materials can also be used to enhance overall efficiency and practicality of such systems. This Review provides a comprehensive overview of the available options for discrete mitigation of NH 3 in gaseous and aqueous matrixes. The performances of photocatalytic materials and systems are compared with respect to quantum and space-time yields. Special attention has been paid to the reaction mechanisms prevalent during photocatalytic removal of NH 3 in each medium coupled with the production of end products (e.g., hydrogen and nitrogen) through NH 3 splitting. The effects of process and operational variables (e.g., irradiation time, relative humidity, mode of operation, and environmental matrix type) on performance are also discussed along with the intrinsic properties of the applied materials (e.g., surface functional sites and structure). Existing obstacles, such as the formation of hazardous byproducts through complicated reaction pathways, are explored along with future challenges.

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“…Guiyu, a well-known illegal ER in China, has gradually closed the scattered disposal workshops and established a centralized industrial park since 2015 . This giant leap from the initial haphazard disposal to the currently regulated disassembly has significantly improved the local environment and reduced human exposure to several pollutants, including metals/metalloids (MeTs), polycyclic aromatic hydrocarbons (PAHs), and various flame retardants. − However, several e-waste byproducts remain unchanged or have even increased because of the transformation of disassembly processes and products. − For example, volatile organic compounds (VOCs) can be substantially generated during the high-temperature treatment of e-waste, but some VOCs with low dielectric constants are resistant to elimination despite the use of advanced terminal decontamination technologies . The pollution profiles caused by e-waste recycling may vary characteristically with the gradual tightening of e-waste control measures.…”

Section: Introductionmentioning

confidence: 99%

Construction of Models To Predict the Effectiveness of E-Waste Control through Capture of Volatile Organic Compounds and Metals/Metalloids Exposure Fingerprints: A Six-Year Longitudinal Study

et al. 2023

Environ. Sci. Technol.

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The significant health implications of e-waste toxicants have triggered the global tightening of regulation on informal e-waste recycling sites (ER) but with disparate governance that requires effective monitoring. Taking advantage of the opportunity to implement e-waste control in the Guiyu ER since 2015, we investigated the temporal variations in levels of oxidative DNA damage, 25 volatile organic compound metabolites (VOCs), and 16 metals/metalloids (MeTs) in urine in 918 children between 2016 and 2021 to demonstrate the effectiveness of e-waste control in reducing population exposure risks. The hazard quotients of most MeTs and levels of 8-hydroxy-2′-deoxyguanosine in children decreased significantly during this time, indicating that e-waste control effectively reduces the noncarcinogenic risks of MeT exposure and levels of oxidative DNA damage. Using mVOC-derived indexes as a feature, a bagging-support vector machine algorithm-based machine learning model was constructed to predict the extent of e-waste pollution (EWP). The model exhibited excellent performance with accuracies >97.0% in differentiating between slight and severe EWP. Five simple functions established using mVOC-derived indexes also had high accuracy in predicting the presence of EWP. These models and functions provide a novel human exposure monitoring-based approach for assessing e-waste governance or the presence of EWP in other ERs.

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Cutting down on the ozone and SOA formation as well as health risks of VOCs emitted from e-waste dismantlement by integration technique

Cited by 24 publications

References 55 publications

Recent Progress in Metal–Organic Framework-Derived Nanostructures in the Removal of Volatile Organic Compounds

Recent Progress in Metal–Organic Framework-Derived Nanostructures in the Removal of Volatile Organic Compounds

Photocatalytic Platforms for Removal of Ammonia from Gaseous and Aqueous Matrixes: Status and Challenges

Construction of Models To Predict the Effectiveness of E-Waste Control through Capture of Volatile Organic Compounds and Metals/Metalloids Exposure Fingerprints: A Six-Year Longitudinal Study

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