From macroalgae to porous graphitized nitrogen-doped biochars – Using aquatic biota to treat polycyclic aromatic hydrocarbons-contaminated water

2020 ◽  
Vol 303 ◽  
pp. 122947 ◽  
Author(s):  
Hu Cheng ◽  
Rongting Ji ◽  
Yongrong Bian ◽  
Xin Jiang ◽  
Yang Song
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Contaminated Water ◽  
Aquatic Biota ◽  
Nitrogen Doped ◽  
Polycyclic Aromatic

scholarly journals Determination and Remediation of Selected Polycyclic Aromatic Hydrocarbons in Petroleum Contaminated Water

2020 ◽  
Vol 24 (3) ◽  
pp. 459-465
Author(s):  
O.O. Ijaola ◽  
A.Y. Sangodoyin
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Removal Efficiency ◽  
Aromatic Hydrocarbons ◽  
Activated Carbons ◽  
Experimental Result ◽  
Contaminated Water ◽  
Total Efficiency ◽  
Spectroscopic Techniques ◽  
Bambusa Vulgaris ◽  
Polycyclic Aromatic

Determination and remediation of pollutants such as polycyclic aromatic hydrocarbons (PAHs) have not being fully regulated in Nigeria; hence  contamination of surface water by such pollutant is a major concern. This study was designed to determine the level of selected PAHs in petroleum contaminated water using spectroscopic techniques and the efficacy of activated carbons made from Bambusa vulgaris and Oxytenanthera  vabyssinaca. Bambusa vulgaris and Oxytenanthera abyssinaca were carbonized at 350OC and activated with Phosphoric acid (CBV350OC H3PO4) and Potassium chloride (COA 350OC KCl) as dehydrating agent respectively. The adsorbents were then used to remediate PAHs in petroleum contaminated water. Liquid-Liquid extraction procedures were used for extracting selected PAHs from sampled solutions. The batch experiment was performed to study the adsorption capacity of adsorbents at 5hrs contact time. Analysis of PAHs concentration for each sampling day was determined by GC-MS. Total PAHs in simulated wastewater did not show a clear trend, contrary to the expectation that there should be a progressive increase with time due to photolysis or photodecomposition of compounds or PAHs. COA 350OC KCl showed a range of 6.2-19.3% removal efficiency of each selected PAH with a total percentage efficiency of 27.7-70.8 for all days. For CBV350OC H3PO4 removal efficiency ranged from 10.26-19.30% for each selected PAH and a total efficiency of 50.8-100% for all selected PAHs for the 4 days intervals. The experimental result showed that adsorbent made from Bambusa vulgaris and Oxytenanthera abyssinaca and activated with H3PO4 and KCl as dehydrating agentrespectively can efficiently adsorb the selected PAHs in contaminated water. The study also revealed that PAHs in contaminated water increases with time due to photodecomposition, thus necessitating their treatment on time.

Bottom-Up Synthesis of Nitrogen-Doped Polycyclic Aromatic Hydrocarbons

Synlett ◽  
2019 ◽  
Vol 31 (03) ◽  
pp. 211-222
Author(s):  
Junzhi Liu ◽  
Xinliang Feng
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Organic Synthesis ◽  
Aromatic Hydrocarbons ◽  
Efficient Method ◽  
Dipolar Cycloaddition ◽  
Bottom Up ◽  
Nitrogen Doped ◽  
Synthesis Strategy ◽  
Polycyclic Aromatic ◽  
Boron Nitrogen

Bottom-up organic synthesis serves as an efficient method to provide atomically precise heteroatom-doped polycyclic aromatic hydrocarbons (PAHs) with not only well-defined size and edge structures but also specific concentrations and positions of the heteroatoms. We provide a plenary account of the preparation of nitrogen-doped PAHs (N-PAHs) through 1,3-dipolar cycloaddition between different dipolarophiles, as well as pyrazine-type N-doped diaza-hexa-peri-hexabenzocoronene (diaza-HBC). Additionally, we present the synthesis of a class of helical N-charged PAHs, including one charged aza[5]helicene and two charged aza[4]helicenes. Moreover, the bottom-up organic synthesis strategy is further extended to the construction of novel nitrogen-boron-nitrogen (NBN)-containing PAHs. Finally, we discuss the synthesis of four-coordinate boron chromophores containing 6,12,18-tris(alkyl amine)-5,11,17-triazatrinaphthylene derivative ligands.1 Introduction2 Nitrogen-Doped PAHs Based on Dibenzo-9a-azaphenalene (DBAP)3 Cationic Nitrogen-Doped Helical PAHs4 Nitrogen–Boron–Nitrogen-Doped PAHs5 Conclusion and Outlook

Synthesis of Magnetic/Graphene Oxide Composite and Application for High-Performance Removal of Polycyclic Aromatic Hydrocarbons from Contaminated Water

Nano LIFE ◽  
2015 ◽  
Vol 05 (03) ◽  
pp. 1542006 ◽  
Author(s):  
Yaping Zhong ◽  
Shan Wang ◽  
Yu He ◽  
Gongwu Song
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
High Performance ◽  
High Efficiency ◽  
Contaminated Water ◽  
Magnetic Graphene Oxide ◽  
Factors Affecting ◽  
Adsorption Mechanisms ◽  
Polycyclic Aromatic ◽  
Material Sciences

An effective method for rapid and high efficiency removal of Polycyclic aromatic hydrocarbons from contaminated water had been proposed based on the Graphene/silica magnetic nanocomposites (M/GO). Factors affecting the adsorption efficiency of M/GO were investigated and we found that the optimum adsorption pH was 5.5, adsorption time was 20 min and adsorbent concentration was 400 mg⋅L-1 for phenanthrene and 1200 mg⋅L-1 for pyrene, respectively. The adsorption mechanisms were also discussed. The regeneration and reuse experiments showed good reusability of the as-prepared adsorbent. In addition, this method was successfully applied to the rapid and high efficiency removal of phenanthrene and pyrene from real water samples, which presages more opportunities for application in environment and material sciences.

Graphene-based metal and nitrogen-doped carbon composites as adsorbents for highly sensitive solid phase microextraction of polycyclic aromatic hydrocarbons

Nanoscale ◽  
2018 ◽  
Vol 10 (21) ◽  
pp. 10073-10078 ◽  
Author(s):  
Fuxin Wang ◽  
Yu Zheng ◽  
Junlang Qiu ◽  
Shuqin Liu ◽  
Yexiang Tong ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Carbon Composites ◽  
Nitrogen Doped ◽  
Fiber Coating ◽  
Highly Sensitive ◽  
Polycyclic Aromatic ◽  
Nitrogen Doped Carbon

A graphene-based metal and nitrogen-doped carbon is successfully developed and applied as an excellent fiber coating for SPME.

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