Characteristics of using layered double hydroxides to reduce the VOCs from bituminous materials

Cui, Pei Qiang; Hougui, Zhou; Li, C.; Wu, Shao Peng; Xiao, Yue

doi:10.1016/j.conbuildmat.2016.06.117

Cited by 34 publications

(4 citation statements)

References 28 publications

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“…Despite initial efforts to quantify VOCs released from certain asphalt sources and assess localized impacts, research in this area remains limited and fragmented across the entire life cycle of asphalt, from raw material production to end of life . The majority of studies rely on laboratory-scale methods, which may not fully replicate the complex real world conditions present in industrial facilities and pavement structures. − Field measurements during actual construction are lacking, and differences in analytical techniques impede comparability between findings. , There is an inadequate understanding of how asphalt chemistry, production parameters, construction methods, environmental conditions, and usage influence VOC emissions over the long term. , The health and environmental impacts have not been comprehensively elucidated through epidemiology, air quality modeling, and integrated exposure assessment . Evaluation standards and legal oversight are still lacking.…”

Section: Introductionmentioning

confidence: 99%

Emission Characteristics, Environmental Impacts, and Health Risks of Volatile Organic Compounds from Asphalt Materials: A State-of-the-Art Review

Li,

Qin,

Zhang

et al. 2024

Energy Fuels

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The emission of volatile organic compounds (VOCs) from asphalt during construction processes presents substantial risks to human health and the environment. To advance sustainable transportation development, this review offers a comprehensive study of the methods for characterization, release characteristics, influencing factors, release mechanisms, and environmental impacts of asphalt VOCs. At present, research has been conducted on characterization methods, component characteristics, influencing factors, and environmental and health risks. The findings indicate that gas chromatography–mass spectrometry is the most comprehensive method for characterizing asphalt VOCs. Asphalt VOCs mainly comprise alkanes, aromatics, and aliphatic hydrocarbons. Factors including the temperature, asphalt source, and ultraviolet radiation can all affect the release characteristics of asphalt VOCs. Elevated VOC levels contribute to the photochemical production of ozone and fine particulate matter, exacerbating air pollution and climate change. Additionally, specific asphalt VOCs, including benzene and polycyclic aromatic hydrocarbons, pose health risks to humans. While progress has been achieved in the current research, challenges persist in quantifying VOCs, assessing their environmental impacts and health risks, and implementing effective mitigation technologies. To address these challenges, future research should focus on establishing asphalt VOC fingerprints, quantitative methods, evaluation criteria, material innovation, optimization of construction processes, exposure assessment, and collaborative solution implementation.

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Section: Introductionmentioning

confidence: 99%

Emission Characteristics, Environmental Impacts, and Health Risks of Volatile Organic Compounds from Asphalt Materials: A State-of-the-Art Review

Li,

Qin,

Zhang

et al. 2024

Energy Fuels

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“…Regarding asphalt binders, the use of LDH has also been investigated in last recent years, especially due to the barrier properties. Such property can give protection against ultraviolet radiation, delay oxidation, and retard the loss of volatiles, consequently enhancing the aging resistance of the binder [26][27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nano Hydrotalcite on the Aging Resistance of a High Binder Content Stone Mastic Asphalt

Crucho

Neves

2021

Applied Sciences

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Hydrotalcite, a type of layered double hydroxide (LDH), reveals an interesting potential for the modification of bitumen. The LDH can induce a barrier effect that prevents the loss of volatiles, retards oxidation, and protects against ultraviolet radiation. Such properties can enhance the aging resistance of the bitumen. However, there is a gap in knowledge regarding the effects of the modification with hydrotalcite in the properties of the asphalt mixture. To contribute to fill such a gap, the current study presents a characterization of the effects of the modification with nano hydrotalcite in the surface characteristics, mechanical performance, and aging resistance of an asphalt mixture. To better explore the effects of the modification, the selected asphalt mixture was a high binder content (7.5%) Stone Mastic Asphalt (SMA). The experimental study indicates that the binder-rich SMA presented adequate performance for application in surface courses. If compared to conventional mixtures, the binder-rich SMA presented better initial mechanical performance (unaged conditions). Furthermore, it presented smaller variation in the parameters between unaged and aged conditions, indicating enhanced aging resistance. The modification with nano hydrotalcite induced smaller evolution in the fatigue resistance parameters, indicating enhanced aging resistance; however, in the remaining tests, the trends were not clear.

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“…In general, activated carbon regeneration is very difficult, except when using specialized methods (steam desorption) [ 16 ]. On the other hand, there has also been research regarding the development of new composite materials (such as nanocomposite thin films produced via electrospinning) to absorb VOCs [ 17 , 18 , 19 , 20 ]. Socholten et al [ 16 ] and Kim et al [ 19 , 21 ] reported that adsorption and desorption of VOCs by electrospun nanofibrous membranes was faster than that of conventional activated carbon.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Functional Polyurethane/Rare Earth Nanocomposite Membranes by Electrospinning and Its VOCs Absorption Capacity from Air

Choi

2017

Nanomaterials

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Volatile organic compounds (VOCs) are a source of air pollution and are harmful to both human health and the environment. In this study, we fabricated polyurethane/rare earth (PU/RE) composite nanofibrous membranes via electrospinning with the aim of removing VOCs from air. The morphological structure of PU/RE nanofibrous mats was investigated using field emission scanning electron microscopy (FE-SEM), fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) experimental analyses. A certain amount of RE (up to 50 wt. % compared to PU pellets) nanoparticles (NPs) could be loaded on/into PU fibers. The tensile strength of PU/RE nanofibrous membranes decreased slightly with the increasing RE powder content. The PU nanofiber containing 50 wt. % RE powder had the smallest fiber diameter of 356 nm; it also showed the highest VOC absorption capacity compared with other composite membranes, having an absorption capacity about three times greater than pure PU nanofibers. In addition, all of the PU/RE nanofibrous membranes readily absorbed styrene the most, followed by xylene, toluene, benzene and chloroform. Therefore, the PU/RE nanofibrous membrane can play an important role in removing VOCs from the air, and its development prospects are impressive because they are emerging materials.

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Characteristics of using layered double hydroxides to reduce the VOCs from bituminous materials

Cited by 34 publications

References 28 publications

Emission Characteristics, Environmental Impacts, and Health Risks of Volatile Organic Compounds from Asphalt Materials: A State-of-the-Art Review

Emission Characteristics, Environmental Impacts, and Health Risks of Volatile Organic Compounds from Asphalt Materials: A State-of-the-Art Review

Effect of Nano Hydrotalcite on the Aging Resistance of a High Binder Content Stone Mastic Asphalt

Fabrication of Functional Polyurethane/Rare Earth Nanocomposite Membranes by Electrospinning and Its VOCs Absorption Capacity from Air

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