Global Environmental Distribution and Human Health Effects of Polycyclic Aromatic Hydrocarbons

2018 ◽  
Vol 16 (10) ◽  
pp. 805-816
Author(s):  
Rithy KAN ◽  
Thaniya KAOSOL ◽  
Perapong TEKASAKUL ◽  
Surajit TEKASAKUL

Risk assessment of emitted particle polycyclic aromatic hydrocarbons (PAHs) from lignite-biomass pelletization burning focusing on size distribution and human health effects are investigated. The particles and PAHs are experimented by a tube furnace and high performance liquid chromatography coupled diode array and fluorescence detectors (HPLC-DAD/FLD), respectively. The carcinogenic, mutagenic, and toxic potencies of PAHs are also discussed in relative to the size distribution of emitted particle PAHs. The results indicate that the carcinogenic, mutagenic, and toxic potencies of PAHs are like to accumulate in the ultrafine particles finer than 0.65 µm. The ultrafine particles contribute the largest PAHs existences of carcinogenic, mutagenic and toxic substances; even though they register in the small mass fraction of PAHs.  Moreover, the co-pellets burning can reduce the values of carcinogenic PAHs, carcinogenic equivalency quotients (BaP-TEQ), mutagenic equivalency quotients (BaP-MEQ), and toxic equivalency quotients (TCDD-TEQ) by more than 60%.


Author(s):  
Lu Yang ◽  
Hao Zhang ◽  
Xuan Zhang ◽  
Wanli Xing ◽  
Yan Wang ◽  
...  

Particulate matter (PM) is a major factor contributing to air quality deterioration that enters the atmosphere as a consequence of various natural and anthropogenic activities. In PM, polycyclic aromatic hydrocarbons (PAHs) represent a class of organic chemicals with at least two aromatic rings that are mainly directly emitted via the incomplete combustion of various organic materials. Numerous toxicological and epidemiological studies have proven adverse links between exposure to particulate matter-bound (PM-bound) PAHs and human health due to their carcinogenicity and mutagenicity. Among human exposure routes, inhalation is the main pathway regarding PM-bound PAHs in the atmosphere. Moreover, the concentrations of PM-bound PAHs differ among people, microenvironments and areas. Hence, understanding the behaviour of PM-bound PAHs in the atmosphere is crucial. However, because current techniques hardly monitor PAHs in real-time, timely feedback on PAHs including the characteristics of their concentration and composition, is not obtained via real-time analysis methods. Therefore, in this review, we summarize personal exposure, and indoor and outdoor PM-bound PAH concentrations for different participants, spaces, and cities worldwide in recent years. The main aims are to clarify the characteristics of PM-bound PAHs under different exposure conditions, in addition to the health effects and assessment methods of PAHs.


Author(s):  
Sultan Hassan Alamri ◽  
Nadeem Ali ◽  
Hussain Mohammed Salem Ali Albar ◽  
Muhammad Imtiaz Rashid ◽  
Nisreen Rajeh ◽  
...  

To control the spread of coronavirus disease (COVID-19), Saudi Arabia’s government imposed a strict lockdown during March–July 2020. As a result, the public was confined to indoors, and most of their daily activities were happening in their indoor places, which might have resulted in lower indoor environment quality. Polycyclic aromatic hydrocarbons (PAHs) were analyzed in household dust (n = 40) collected from different residential districts of Jeddah, Saudi Arabia, during the lockdown period. PAHs’ levels were two folds higher than the previously reported PAHs in indoor dust from this region. We detected low molecular weight (LMW) with two to four aromatic ring PAHs in all the samples with a significant contribution from Phenanthrene (Phe), present at an average concentration of 1590 ng/g of dust. Although high molecular weight (HMW) (5–6 aromatic ring) PAHs were detected at lower concentrations than LMW PAHs, however, they contributed >90% in the carcinogenic index of PAHs. The estimated daily intake (EDI) of specific PAHs was above the reference dose (RfD) for young children in high-end exposure and the calculated Incremental Lifetime Cancer Risk (ILCR) was >1.00 × 10−4 for both Saudi adults and young children. The study highlighted that indoor pollution has increased significantly during lockdown due to the increased indoor activities and inversely affect human health. This study also warrants to conduct more studies involving different chemicals to understand the indoor environment quality during strict lockdown conditions.


2015 ◽  
Vol 9 (3) ◽  
pp. 126-135 ◽  
Author(s):  
A Yusuf Kafeelah ◽  
N Ezechukwu Lucy ◽  
A Fakoya Kafayat ◽  
L Akintola Shehu ◽  
I Agboola Julius ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document