Laccase-carrying electrospun fibrous membrane for the removal of polycyclic aromatic hydrocarbons from contaminated water

2013 ◽  
Vol 104 ◽  
pp. 1-8 ◽  
Author(s):  
Yunrong Dai ◽  
Junfeng Niu ◽  
Lifeng Yin ◽  
Jiangjie Xu ◽  
Jiarui Xu
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Fibrous Membrane ◽  
Contaminated Water ◽  
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.

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.

scholarly journals Micellar Enhanced Ultrafiltration for the Removal of Polycyclic Aromatic Hydrocarbons (PAHs) Mixtures in Underground Contaminated Water in Oman

2011 ◽  
Vol 16 ◽  
pp. 13
Author(s):  
Mohamed Aoudia ◽  
Amal Al-Sabahi ◽  
Salma Al-Kindy ◽  
Mahfoodh Al-Sheily ◽  
Fouzul Marikar
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Aromatic Compounds ◽  
Tween 80 ◽  
Underground Water ◽  
Gas Chromatography Mass Spectrometry ◽  
Contaminated Water ◽  
Standard Mixture ◽  
Polycyclic Aromatic ◽  
Micellar Enhanced Ultrafiltration

In an attempt to analyze polycyclic aromatic hydrocarbons (PAHs) in diesel contaminated underground water in Oman (Rustaq), Gas chromatography-Mass spectrometry was first used to determine the different concentrations in a standard mixture containing 16 PAHs. Retention time and calibration curves were obtained for all aromatic compounds and were used to identify a given analyte as well as its concentration in the contaminated underground water. Micellar enhanced ultrafiltration (MEUF) was then used to treat standard aqueous solution of PAHs at low concentration (~ 1 ppb) using an edible nonionic surfactant (Tween 80). The totality of the mixture components was completely rejected. Within the experimental detection limit (± 0.01 ppb), the residual PAH concentrations were less than 0.01 ppb in accord with the allowed concentrations in drinking water. Likewise, excellent rejections of PAHs in MEUF treatment of diesel contaminated underground water at an Omani site (Rustaq) were observed. The concentration of PAHs was reduced to less than 0.01 ppb, the accepted limit for the most toxic member of the PAH group (benzo(a)pyrene).  

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