scholarly journals Peer Review #2 of "Metagenomic survey of methanesulfonic acid (MSA) catabolic genes in an Atlantic Ocean surface water sample and in a partial enrichment (v0.1)"

2016 ◽  
Keyword(s):  
Surface Water ◽  
Atlantic Ocean ◽  
Water Sample ◽  
Peer Review ◽  
Methanesulfonic Acid ◽  
Ocean Surface ◽  
Surface Water Sample ◽  
Catabolic Genes

scholarly journals Draft Genome Sequence of Uncultured SAR324 Bacterium lautmerah10, Binned from a Red Sea Metagenome

2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Mohamed F. Haroon ◽  
Luke R. Thompson ◽  
Ulrich Stingl
Keyword(s):  
Saudi Arabia ◽  
Surface Water ◽  
Water Sample ◽  
Water Column ◽  
Red Sea ◽  
Genome Sequence ◽  
Draft Genome ◽  
Surface Water Sample ◽  
Genomic Information ◽  
Different Depths

A draft genome of SAR324 bacterium lautmerah10 was assembled from a metagenome of a surface water sample from the Red Sea, Saudi Arabia. The genome is more complete and has a higher G+C content than that of previously sequenced SAR324 representatives. Its genomic information shows a versatile metabolism that confers an advantage to SAR324, which is reflected in its distribution throughout different depths of the marine water column.

scholarly journals Comparative Assessment of the Efficiency of Rice Husk Biochar and Conventional Water Treatment Method to Remove Chlorpyrifos from Pesticide Polluted Water

2020 ◽  
pp. 1-11 ◽  
Author(s):  
Aderonke A. Okoya ◽  
Oyeyemi S. Adegbaju ◽  
Oyindamola E. Akinola ◽  
Abimbola B. Akinyele ◽  
Omotayo S. Amuda
Keyword(s):  
Water Treatment ◽  
Surface Water ◽  
Water Sample ◽  
Rice Husk ◽  
Contact Time ◽  
Simulation Experiment ◽  
Polluted Water ◽  
Surface Water Sample ◽  
Initial Concentration ◽  
Rice Husk Biochar

Nigeria is currently the largest rice producing country in Africa. High volumes of waste such as rice husk are inevitable with high production. Also pesticides used to rid of pests, diseases and improve crop yield find their ways into available surface water that serves domestic purpose. This study therefore determined the efficiency of conventional water treatment procedure for pesticide/pesticide residue removal and evaluated the performance of rice husk-based biochar as adsorbent to remove chlorpyrifos from domestic water supply with a view to manage  solid waste (rice husk) for treating pesticide polluted water. Batch adsorption studies were carried out to assess the adsorption efficiency of rice husk biochar (RHB) for chlorpyrifos pesticide removal from surface water. Adsorbent dosage, initial concentration, contact time and dosage were optimized during simulation experiment. RHB and commercial activated carbon (CAC) were used for the removal of chlorpyrifos from surface water sample using the optimum condition from the simulation experiment after which the concentrations were determined using Gas Chromatography with Mass Spectrometry detector. Both Langmuir and Freundlich adsorption isotherms were investigated. RHB gave percentage moisture (5.27±0.94), carbon yield (39.44±0.47), ash (41.96±0.96), fixed carbon (35.24±0.55), volatile matter (35.67±1.01 mg/g), Iodine number (85.57±0.81), surface area (97.20 m2/g), pH (7.90±0.14) and Electrical conductivity (298.8±1.14). Of the elements present in the char, Carbon has the highest percentage of 59.14%. Best adsorption conditions for RHB in this study were 2.8 mg/L initial concentration; 0.8 g of adsorbent dosage; pH of 5 and contact time of 30 min. The data fitted Freundlich than Langmuir model (R2 0.996 and 0.8315 respectively). Percentage removal of chlorpyrifos for CAC and RHB was 93.7±3.96 and 94.5±5.23 respectively for the surface water sample. Results concluded that RHB was efficient for removal of chlorpyrifos present in water and could be used as alternative for CAC in water treatments.

scholarly journals Magnetically Recoverable and Reusable Titanium Dioxide Nanocomposite for Water Disinfection

2021 ◽  
Vol 9 (9) ◽  
pp. 943 ◽  
Author(s):  
Monica Keeley ◽  
Kim Kisslinger ◽  
Carman Adamson ◽  
Ping Y. Furlan
Keyword(s):  
Surface Water ◽  
Water Sample ◽  
Uv Light ◽  
Sol Gel ◽  
Bacterial Count ◽  
Water Disinfection ◽  
Alkaline Condition ◽  
Real Surface ◽  
Surface Water Sample ◽  
Amorphous Tio2

A bifunctional magnetic Fe3O4@SiO2@TiO2 or MS-TiO2 antimicrobial nanocomposite was prepared based on simple sol-gel methods with common equipment and chemicals. Reaction pH was found to influence the TiO2 upload in the nanocomposite. The alkaline condition produced the greatest TiO2 upload, while the acidic condition the least. Annealing at 300 °C turned the as-synthesized amorphous TiO2 into one with high content of anatase, the most photoactive form of TiO2. Irradiated by 365 nm UV light, a sample of 30 mg/mL of annealed nanocomposite containing 12.6 wt.% Ti was shown to be able to completely eradicate 104 CFU/mL of the laboratory-grown E. coli within 25 min, 25 min faster than the control when the 365 nm UV light was employed alone. The nanocomposite demonstrated consistent antimicrobial performance over repeated uses and was easily recoverable magnetically due to its high magnetization value (33 emu/g). Additionally, it was shown to reduce the bacterial count in a real surface water sample containing 500–5000 CFU/mL of different microbes by 62 ± 3% within 30 min. The irradiating 365 nm UV light alone was found to have generated little biocidal effect on this surface water sample. The nanocomposite is promising to serve as an effective, safe, and eco-friendly antimicrobial agent, especially for surface water disinfection.

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