Laser decontamination and decomposition of PCB-containing paint

Anthofer, A.; Kögler, P.; Friedrich, C.; Lippmann, Wolfgang; Hurtado, Antonio

doi:10.1016/j.optlastec.2016.07.006

Cited by 19 publications

(7 citation statements)

References 16 publications

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“…Threedifferent types of coating were prepared to be coated on the steel specimen for corrosion studies. There are no standard mix proportions for these coatings, so trial and error method were followed regarding the preparation of coatings [9]. The coatings are as follows:…”

Section: Coating Processmentioning

confidence: 99%

Novel Development of Corrosion Resistant Paint Using Printed Circuit Board from Modern Electronic Wastes

Rajendran¹,

Giftlin²

2022

Trends Sci

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The growth in the industrial technology and communication sectors has enhanced the usage of electronic gadgets exponentially. Thus, it becomes highly essential to find new solution to utilize or dispose these e-wastes, in order to reduce the e-waste generation. Various reports mentioned that the major component of these e-wastes is their Printed Circuit Boards. Therefore, a new ideology is proposed to use these boards to produce a new coating with good corrosion resistance. At first the boards were separated from the discarded electronic appliances and various electrical elements were separated from these boards. Then the plain circuit boards are pulverized into fine particles and mixed with paint in 3 different proportions ranging from 1:4 to 1:2. The resulting mix was applied over the steel specimen and tested for corrosion resistance. The assessment was done in the aspects of contact angle, weight loss percentage, potentio dynamic polarization technique and electro chemical impedance spectroscopy. From the results it was clear that increase in the addition of printed circuit powder content in the corrosion proof paint coating enhanced the efficiency of the corrosion resistant behaviour 3.5 times than the specimen with uncoated steel specimens. This development of corrosion resistant behaviour of printed circuit powder was attributed from the inertness offered by the presence of silicon dioxides towards the corrosive fluids. Although, the coating of 1:2 proved to be optimum to protect the steel elements from the aggressive corrosion environment, by considering the workability aspects the 1:3 combination was suggested for the innovative development of anti-corrosion paint coating from the e-waste resources. HIGHLIGHTS Life cycles of every electronic wastes end with the hazardous challenging disposals Innovative utilizations of these electronic wastes for the corrosion resistant structural applications were detailed An anti corrosive coating for steel reinforcement was developed from the waste printed circuit boards Coating by printed circuit board powder enhanced 3.5 times more protection from the corrosion GRAPHICAL ABSTRACT

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Section: Coating Processmentioning

confidence: 99%

Novel Development of Corrosion Resistant Paint Using Printed Circuit Board from Modern Electronic Wastes

Rajendran¹,

Giftlin²

2022

Trends Sci

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“…In Denmark, open uses of PCBs were banned in 1977 and closed uses were banned in 1986 (Frederiksen, Meyer, Ebbehoj, & Gunnarsen, 2012). The Federal Republic of Germany prohibited the production and use of PCBs in 1989 (Anthofer, Kogler, Friedrich, Lippman, & Hurtado, 2017). South Korea banned the manufacture, import or use of PCBs greater than 20 ppm in 1996 (Nguyen et al, 2016).…”

Section: Tsca Historymentioning

confidence: 99%

Legacy PCB building remediation

Hamper¹

2020

Remediation Journal

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Polychlorinated biphenyls (PCBs) came onto the scene as an environmental threat quickly after they were discovered in humans and wildlife by Jensen in 1966. By October 1970, it was reported that PCBs were “truly ubiquitous pollutants” as PCBs were found at detectable concentrations in environmental samples throughout the world. Before 1971, the U.S. Environmental Protection Agency (EPA) reported that 26% of PCBs sold were used in open‐end use applications, such as caulks, sealants, plasticizers, surface coatings, ink, adhesive, and carbonless paper. Processing and distribution of PCBs in commerce were largely banned in the U.S. after July 1979 with certain continued uses authorized by the EPA. While PCBs were banned a long time ago, the ban had no immediate tangible effect on the continued use of regulated levels of PCBs in buildings constructed before the bans were implemented. Legacy buildings with PCB‐containing building materials continue to represent potential sources of indoor air, dust, outdoor air, and soil contamination. Where PCBs are present in building materials, they have the potential to pose a risk to building occupants. Proper removal of PCB‐containing materials is a highly effective approach to abating the risk. The removal can range from targeting specific building PCB‐containing materials through demolition of the building. Engineering and administrative controls can also be useful tools when addressing the risks posed by PCB‐containing materials.

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“…PCBs have physicochemical properties that are industrially useful, including nonflammability, chemical stability, high boiling point, and electrical insulating properties, which has led to their mass production and widespread use in electrical transformers, capacitors, regulators, hydraulic fluids, plasticizers, and lubricants [2]. Despite the limited production or the ban of PCBs since the late 1970s due to their toxic, bioaccumulative, and carcinogenic behavior, some industrial equipment containing PCBs has remained in operation [3, 4]. Large amounts of PCBs have been released into the environment, and congeners are still frequently detected in environmental media including soil [5], sediment [6], water [7], and air [8].…”

Section: Introductionmentioning

confidence: 99%

“…However, these methods were typically applied to environmental samples, such as soil [19, 20] and sediment [21, 22]. Very few methods have been reported for measuring PCB levels in vegetable samples [10, 12], and the procedures for sample pretreatment are usually based on the Soxhlet extraction [4, 17], liquid-liquid extraction [9], and/or microwave-assisted extraction [19] techniques, coupled with cleanup methods involving column chromatography [6, 10, 18], solid-phase extraction [13], and concentrated sulfuric acid [20]. Most of these approaches are cumbersome, time-consuming, and expensive and often consume large volumes of toxic solvents.…”

Section: Introductionmentioning

confidence: 99%

Carboxylated Multiwalled Carbon Nanotubes as Dispersive Solid-Phase Extraction Sorbent to Determine Eighteen Polychlorinated Biphenyls in Vegetable Samples by Gas Chromatography-Mass Spectrometry

Liu

DaiFeng

Mao

et al. 2019

Journal of Analytical Methods in Chemistry

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A simple, rapid, and reliable method based on dispersive solid-phase extraction (d-SPE) and gas chromatography-mass spectrometry (GC-MS) was developed for quantitating polychlorinated biphenyls (PCBs) in vegetable samples. Parameters affecting both the extraction yields and cleanup efficiency, including the type and volume of extraction solvent, extraction time, type and volume of cleanup sorbent, and cleanup time, were optimized. Matrix effects were evaluated, and matrix-matched calibration was recommended. Under the optimized conditions, carboxylated multiwalled carbon nanotubes (MWCNTs-COOH), which exhibit excellent adsorption capabilities due to large surface area and unique structure, were employed as d-SPE sorbent to remove interfering substances, rather than the analytes, from vegetable samples. Satisfactory linear relationship was observed for all PCBs across a concentration range of 5–500 μg/kg with correlation coefficients no less than 0.9993. Four representative vegetables (cucumber, tomato, lettuce, and cabbage) were selected as matrices for method validation. Each matrix was spiked at concentrations of 5, 10, and 100 μg/kg to evaluate recoveries, which ranged from 84.5% to 116.5% with relative standard deviations (n=6) between 0.6% and 17.6%. The limits of detection and the limits of quantification ranged from 0.3 to 1.4 μg/kg and 0.8 to 4.5 μg/kg, respectively. Twelve real vegetable samples were analyzed using the proposed method. Three of the target PCBs were detected in one lettuce sample with the total concentration of 17.9 μg/kg.

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Laser decontamination and decomposition of PCB-containing paint

Cited by 19 publications

References 16 publications

Novel Development of Corrosion Resistant Paint Using Printed Circuit Board from Modern Electronic Wastes

Novel Development of Corrosion Resistant Paint Using Printed Circuit Board from Modern Electronic Wastes

Legacy PCB building remediation

Carboxylated Multiwalled Carbon Nanotubes as Dispersive Solid-Phase Extraction Sorbent to Determine Eighteen Polychlorinated Biphenyls in Vegetable Samples by Gas Chromatography-Mass Spectrometry

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