scholarly journals A Win–Win Combination to Inhibit Persistent Organic Pollutant Formation via the Co-Incineration of Polyvinyl Chloride E-Waste and Sewage Sludge

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 835
Author(s):  
Gerard Gandon-Ros ◽  
Samuel S. Nuñez ◽  
Nuria Ortuño ◽  
Ignacio Aracil ◽  
María Francisca Gómez-Rico ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Polyvinyl Chloride ◽  
Organic Pollutant ◽  
Combustion Process ◽  
Tubular Reactor ◽  
Persistent Organic Pollutant ◽  
Molar Ratio ◽  
Pollutant Formation ◽  
Chemical Inhibitors ◽  
Polycyclic Aromatic

Persistent organic pollutant inhibition in the combustion process of polyvinyl chloride (PVC) by prior addition of an inhibitor is currently being studied, reducing the emission of pollutants, and thus reducing the large amount of waste PVC destined for landfill. In this work, the use of sewage sludge (SS) as an alternative to chemical inhibitors to improve the quality emissions of the incineration of polyvinyl chloride waste (PVC e-waste) was studied and optimized. Different combustion runs were carried out at 850 °C in a laboratory tubular reactor, varying both the molar ratio Ri (0.25, 0.50, 0.75) between inhibitors (N + S) and chlorine (Cl) and the oxygen ratio λ (0.15, 0.50) between actual oxygen and stoichiometric oxygen. The emissions of several semivolatile compounds families such as polycyclic aromatic hydrocarbons (PAHs), polychlorobenzenes (ClBzs), and polychlorophenols (ClPhs), with special interest in the emissions of the most toxic compounds, i.e., polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (dl-PCBs), were analyzed. A notable decrease in PCDD/F and dl-PCB formation was achieved in most of the experiments, especially for those runs performed under an oxygen-rich atmosphere (λ = 0.50), where the addition of sludge was beneficial with inhibition ratios Ri ≥ 0.25. An inhibition ratio of 0.75 showed the best results with almost a 100% reduction in PCDD/F formation and a 95% reduction in dl-PCB formation.

Mechanism of unintentionally produced persistent organic pollutant formation in iron ore sintering

2016 ◽  
Vol 306 ◽  
pp. 41-49 ◽  
Author(s):  
Yifei Sun ◽  
Lina Liu ◽  
Xin Fu ◽  
Tianle Zhu ◽  
Alfons Buekens ◽  
...  
Keyword(s):  
Iron Ore ◽  
Organic Pollutant ◽  
Persistent Organic Pollutant ◽  
Pollutant Formation ◽  
Iron Ore Sintering ◽  
Ore Sintering

Assessment of persistent organic pollutants in water samples from River Challawa in Kano, Nigeria

2015 ◽  
Vol 5 (2) ◽  
Author(s):  
A. Sarauta ◽  
A. Sabo ◽  
I. A. Abdulhamed ◽  
Y. O. Yusuf
Keyword(s):  
River Basin ◽  
Water Samples ◽  
Organic Pollutant ◽  
Secondary Data ◽  
Persistent Organic Pollutant ◽  
Regulatory Agencies ◽  
Systematic Random Sampling ◽  
Reconnaissance Survey ◽  
Polycyclic Aromatic ◽  
Total Concentrations

<p>This study was aimed at assessing the levels Persistent Organic Pollutant in Challawa River Basin of Kano State, Nigeria. The investigation was particularly plan to assess the presence of PCBs and PAHs in River Challawa and compare the concentrations of the pollutants with the acceptable limit set by Nigerian Standard and other international regulatory agencies. Data were collected using reconnaissance survey; laboratory experiment as well as other secondary data sources. A total of 26 water samples were collected through stratified and systematic random sampling. Three sampling points were chosen and designated A, B and C along the stretch of the river from Yan Danko Bridge to Tamburawa bridge. The result shows that Polychlorinated biphenyls were not detected but polycyclic aromatic hydrocarbons  were detected in all the samples analyzed using GCMS. The total concentrations of PAHs in the water samples range between 0.001 to 0.087mg/l. The analytical results revealed that most of the pollutants present in water were at significantly very high levels especially at Zamawa village situated very close to Challawa industrial estate - the major sources of effluent discharge point, making the drinking water around area is not fit for consumption. In conclusion, it can be said that industrial activities had impact on Challawa River basin and its environment. It is recommended among others that the industries should treat their effluents before releasing them into Challawa river basin. </p><p> </p><p>Keywords: persistent, organic, pollutant, challawa river, Nigeria</p>

scholarly journals Structural and Magnetic Properties of Potassium-Doped 2,3-DiMethylnaphthalene

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 608
Author(s):  
Xiao-Lin Wu ◽  
Ren-Shu Wang ◽  
Hui Yang ◽  
Jie Zhang ◽  
Ming-An Fu ◽  
...  
Keyword(s):  
Benzene Ring ◽  
Organic Molecules ◽  
Magnetic Measurements ◽  
Ring Structure ◽  
Molar Ratio ◽  
First Principles Calculations ◽  
Paramagnetic Behavior ◽  
Polycyclic Aromatic ◽  
Metal Doped ◽  
Derivatives Of

The development of potential magnetic materials in metal-doped polycyclic aromatic hydrocarbons has been a research hotspot in recent years. Here we have successfully synthesized stable potassium-doped 2,3-dimethylnaphthalene samples. The combination of first-principles calculations and XRD results identifies that doping of potassium into 2,3-dimethylnaphthalene forms a monoclinic structure with a molar ratio of 1:2 between potassium and molecule. The red shifts in the Raman spectra indicate that potassium 4s electrons are transferred to the organic molecules. The magnetic measurements show that the doped materials exhibit a temperature-independent magnetization in the temperature region of 1.8–300 K, which is consistent with the Pauli paramagnetic behavior. This is distinct from the diamagnetism of pristine material. Compared to the previous focus on benzene ring structure, our study of aromatic hydrocarbon derivatives of benzene ring opens a new route for the development of this field.

scholarly journals Energy Treatment of Solid Municipal Waste in Combination with Biomass by Decentralized Method with the Respect to the Negative Effects on the Environment

2021 ◽  
Vol 13 (8) ◽  
pp. 4405
Author(s):  
Miroslav Rimar ◽  
Olha Kulikova ◽  
Andrii Kulikov ◽  
Marcel Fedak
Keyword(s):  
Heavy Metals ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Process Analysis ◽  
Combustion Process ◽  
Municipal Waste ◽  
Negative Effects ◽  
Combustion Properties ◽  
Polycyclic Aromatic ◽  
Fuel Mixtures

Waste is a product of society and one of the biggest challenges for future generations is to understand how to sustainably dispose of large amounts of waste. The main objective of this study was to determine the possibility and conditions of the decentralized combustion of non-hazardous municipal waste. The analysis of the combustion properties of a mixture of wood chips and 20–30% of municipal solid waste showed an improvement in the operating parameters of the combustion process. Analysis also confirmed that the co-combustion of dirty fuels and biomass reduced the risk of releasing minerals and heavy metals from fuel into the natural environment. Approximately 55% of the heavy metals passed into the ash. The analysis of municipal solid waste and fuel mixtures containing municipal solid waste for polycyclic aromatic hydrocarbons showed the risk of increasing polycyclic aromatic hydrocarbon concentrations in flue gases.

scholarly journals Association of In Utero Persistent Organic Pollutant Exposure With Placental Thyroid Hormones

Endocrinology ◽  
2018 ◽  
Vol 159 (10) ◽  
pp. 3473-3481 ◽  
Author(s):  
Zhong-Min Li ◽  
David Hernandez-Moreno ◽  
Katharina Maria Main ◽  
Niels Erik Skakkebæk ◽  
Hannu Kiviranta ◽  
...  
Keyword(s):  
Thyroid Hormones ◽  
Organic Pollutant ◽  
In Utero ◽  
Persistent Organic Pollutant

Fate of polycyclic aromatic hydrocarbons during composting of activated sewage sludge with green waste

2008 ◽  
Vol 99 (18) ◽  
pp. 8819-8823 ◽  
Author(s):  
M. Hafidi ◽  
S. Amir ◽  
A. Jouraiphy ◽  
P. Winterton ◽  
M. El Gharous ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Sewage Sludge ◽  
Aromatic Hydrocarbons ◽  
Green Waste ◽  
Polycyclic Aromatic ◽  
Activated Sewage Sludge

scholarly journals Specialisation events of fungal metacommunities exposed to a persistent organic pollutant are suggestive of augmented pathogenic potential

Microbiome ◽  
2018 ◽  
Vol 6 (1) ◽  
Author(s):  
Celso Martins ◽  
Adélia Varela ◽  
Céline C. Leclercq ◽  
Oscar Núñez ◽  
Tomáš Větrovský ◽  
...  
Keyword(s):  
Organic Pollutant ◽  
Persistent Organic Pollutant ◽  
Pathogenic Potential
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