Lyophilized carbon nanotubes/graphene oxide modified cigarette filter for the effective removal of cadmium and chromium from mainstream smoke

Yu, Yong-Liang; Zhuang, Yuting; Song, Xiuxian; Wang, Jianhua

doi:10.1016/j.cej.2015.05.105

Cited by 21 publications

(10 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The questionnaire results showed that more than 50 % of both exposed groups were smokers. According to Yong-Liang Yu [35], the chromium content of cigarette filters was 165 ± 11 ng per cigarette, while in the tobacco blend it was 126.7 ± 3.7 ng per cigarette, and it can accumulate in human tissues including the hair. Lead exposure in hair were also partly contributed by cigarettes.…”

Section: Resultsmentioning

confidence: 99%

Assessment of Heavy Metals on Occupationally Exposed Workers from Hair Analysis

et al. 2017

View full text Add to dashboard Cite

The use of human hair as a tool in assessing changes and abnormalities in human bodies has been increasing for last decades since it may reflect the health status or environmental condition of habitation or working place of individuals as well as population groups. Compared to other body tissue or fluids, hair provides an ease of elemental analysis especially in reflecting the long-term exposure. This research was conducted to determine the elemental content especially heavy metals, since they are bioaccumulated in human body organs and impact human health, in hair of workshop workers and traffic services officers as exposed groups and its comparison with control group and references data for assessing of occupational exposure. Thirty-five automotive workshop workers and 32 traffic services officers' hair specimens were collected in Bandung, while hair specimens of the control group were collected from 43 healthy individuals. The elemental concentrations in hair specimen were analyzed using neutron activation analysis (NAA) for mercury and chromium, and atomic absorption spectrometry (AAS) for lead and arsenic. The accuracy of the method was evaluated using GBW 07601 human hair certified reference material (CRM) and it was found to give good results in accordance with the certificate values. It was found that chromium, lead, and arsenic hair concentration in exposed groups (0.88, 10.7, and 0.051 mg/kg, respectively) were higher than in control group (0.27, 4.52, and 0.045 mg/kg, respectively), while mercury hair concentration of traffic services officers were higher than control group but mercury hair concentration of automotive workshop workers were lower than in control group (1.41 mg/kg). The t-test statistical results shown that mercury concentrations in one exposed group did not differ significantly from the control, but other exposed groups showed otherwise. The level of mercury in hair is strongly attributed not only to environmental exposure, but also to lifestyle and dietary habits, while t-test statistical results of chromium and lead differ significantly with p value < 0.05. These results indicate that heavy metal hair concentrations were well quantified to show the abnormalities of elemental concentration in human hair for evaluating the occupational exposure.

show abstract

Section: Resultsmentioning

confidence: 99%

Assessment of Heavy Metals on Occupationally Exposed Workers from Hair Analysis

et al. 2017

View full text Add to dashboard Cite

show abstract

“…[67] Actually, these toxic elements belonging to heavy metals can easily reach the pulmonary system for which has been detected in highest amount in smokers than those in nonsmokers. [68] By comparing the particle contaminants with the smoked filter at mouthpiece side (Figure 5c), metal inorganic elements increased in size in particular for T-cigarettes in which the macro-objects unfortunately were still observed. The size contaminants of fiber filter-hnbA show an excessive increment, probably due to the different component analyzed of the cigarette of Region III.…”

Section: Resultsmentioning

confidence: 99%

Direct imaging evidences of metal inorganic contaminants traced into cigarettes

Matassa

Cattaruzza

Sandorfi

et al. 2021

Journal of Hazardous Materials

View full text Add to dashboard Cite

Today, environmental health research of adverse hybrid materials diffused by cigarette represents a new challenge for identifying new health risks directly related to the specific micro-sized materials in terms of their morpho-chemical features. Distinctive assumptions about the origin, the evolution? growth, and the functionalization of toxic elusive particles have been proposed by scientific research to attend the relevant toxicological aspects of observable behaviors. Therefore, direct morpho-chemical observations of the toxic hybrid particles are the most important factor for showing their adverse effects. Here, we report how metal inorganic particles, identified in three micrometric regions of the cigarette, evolve in their chemical size distributions into a self-assembled agglomerates ranging from ultrafine powder to large micrometric complex before and after smoking. Detailed morpho-chemical investigation on these metal inorganic materials interacting with cigarette components, quantified in situ through electron microscopy techniques, has been performed for one traditional and two heat-not-burn cigarettes of three different brands. The experimental informations gathered allowed us to figure out the evolution of the particles from the early stage (before smoking) to the final (after smoking) assembled in hazardous large agglomerates chemically manipulated and delivered by particles heat carrier, the smoke. In particular, our work shows the dual role of the adverse smoke, generated by burning and heating processes, capable of growing multi-elemental macro-aggregates and of transporting the toxic pollutants, thereby the diffusing of contaminants in the natural environmental is independent from the safety engineered features adopted by tobacco company. The reported results represent a valuable background toward the full comprehension of evolution of the toxic materials into cigarettes responsible of altering and destroying the already contaminated nature, especially for human health.

show abstract

“…66 This excellent removal efficiency of the fabricated filter is presumably related to its intrinsic physical and chemical adsorption properties. Earlier, Branton et al 61 and Yu et al 29 have reported that the adsorption efficiency of additive filter materials increases almost linearly with the specific surface area and its geometrical length. Herein, the specific surface area of the MWCNTs membrane is comparable to or higher than the other additive materials used to develop the filter.…”

Section: Detection Of Heavy Metal Concentration In Cigarette Smokementioning

confidence: 95%

“…29,51,52 In addition to this, the several attempts have also been made to reduce the toxicity of cigarette smoke using the powder form of nanotubes. 29,36 Thus, we believe that a MWCNTs membrane could be the promising candidate for removing toxic compounds from cigarette smoke. Interestingly, to the best of our knowledge, the removal of toxic compounds from the cigarette smoke by such a type of lightweight, flexible, binderfree membrane has not been reported yet.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, long-term intake of PM 2.5 increases morbidity and mortality. − In the same way, the heavy metals present in cigarette smoke such as nickel, cobalt, copper, zinc, lead, cadmium, etc. are also widely known for their toxic nature, which adversely affects human health. − These heavy metals also accumulate in tissues and fluids through smoking and lead to a cancer risk. − Therefore, they have also been paid much more attention due to their direct relation with the smoker’s health.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multiwalled Carbon Nanotube Filters for Toxin Removal from Cigarette Smoke

Pandey

Vishwakarma

Yadav

et al. 2019

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

The fatal diseases and disorders caused by smoking have raised a serious concern for worldwide public health. So for its prevention, it has become very necessary to develop various types of filter material for the removal of carcinogenic and other toxic elements present in cigarette smoke. Herein, we demonstrate a novel filter for cigarettes, fabricated by the insertion of multiwalled carbon nanotubes (MWCNTs) based thin flexible membrane into the conventional cellulose acetate filter. The developed filter has attractive attributes of high filtering efficiency, lightweight, flexible, cost-effective, and scalable production. This flexible MWCNTs membrane has been fabricated using a simple vacuum-assisted filtration technique followed by the synthesis of MWCNTs using a cost-effective spray pyrolysis technique. The filter shows excellent performance for the removal of PM2.5, having a removal efficiency of ∼99%. It also shows a significant ability to remove nicotine, tar, and toxic heavy metals such as lead present in cigarette smoke.

show abstract

Lyophilized carbon nanotubes/graphene oxide modified cigarette filter for the effective removal of cadmium and chromium from mainstream smoke

Cited by 21 publications

References 34 publications

Assessment of Heavy Metals on Occupationally Exposed Workers from Hair Analysis

Assessment of Heavy Metals on Occupationally Exposed Workers from Hair Analysis

Direct imaging evidences of metal inorganic contaminants traced into cigarettes

Multiwalled Carbon Nanotube Filters for Toxin Removal from Cigarette Smoke

Contact Info

Product

Resources

About