Bioefficiency of Indigenous Microbial Rhodanese in Clean-up of Cyanide Contaminated Stream in Modakeke, Ile-Ife, Osun State, Nigeria

Cyanide pollution of aquatic environment has become a great concern in Nigeria because of the increase in cassava cultivation.

In Nigeria, cassava processing milling plants are usually situated around streams or rivers such that the waste from each stages of processing easily find their way into these water bodies as effluents and waste waters.

Extracellular rhodanese of Klebsiella edwardsii isolated from Atutulala stream, Modakeke, where cassava is being processed, was assessed for its bioremediation potential. Cyanide concentration of the stream was analysed for six months.

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Long-term Changes in Annual Precipitation and Monsoon Seasonal Characteristics in Myanmar

This paper compares the results produced by MODFLOW, a constant-density model, to results produced by SEAWAT, a variable-density model, to investigate the feasibility of using MODFLOW in a saline environment below an estuary known as the Indian River Lagoon.

The comparison was conducted over sixteen numerical simulation cases at different conditions of estuarine salinity CL, hydraulic conductivity anisotropy ratio Kr, and water table elevations on the freshwater boundaries in a two-dimensional vertical domain.

The use of MODFLOW at the study site under the calibrated Kr distribution ranging from 1000-20,000 was found to accurately match the field-measured and SEAWAT simulated results with a remarkable increase in accuracy at higher groundwater elevations.

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Diversity and Abundance of Avian Species of Owena Multipurpose Dam, Ondo State, Southwest, Nigeria

The use of wetlands and their resources is widespread among many diverse bird taxa of the world. The diversity and abundance of avian species in Owena Multipurpose dam was assessed out between January and June, 2016 to provide baseline information of the birds in this area.

The line transects method with lengths ranging from 350 m-1000 m was adopted for the survey. Birds recorded were categorized into order, family, species, migratory status and feeding guild.

Relative abundance of bird species and diversity indices were determined. Significance in mean bird density in the two seasons was determined using T-test while One-Way ANOVA was used to test for significance in bird diversity indices.

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Aged Refuse Characterization as Resource for Wastewater Treatment and Landfill Remediation

Landfilling has become the most effective solid waste disposal option in developing countries. Aged Refuse (AR) in this context is solid wastes from landfill which has become stabilized after several years of placement.

The aged refuse sampled from Air Hitam landfill site in Malaysia is characterized as follows: moisture content 29.5%, Loss on Ignition (LOI) 9.90%, porosity 51%, ash content 95.99%, bulk density 1.23 g/cm3, hydraulic conductivity 0.31 cm/min, electrical conductivity 143.10 ms/cm and Carbon-Nitrogen-Sulphur (CNS) of 0.64%, 0.04% and 0.009%, respectively.

Cation Exchange Capacity (CEC) is 2.69 meq/100 gm, with exchangeable cations of Calcuim, Magnesium, Potassium and Sodium. The SEM/EDX showed available specific surface area of 3.376 m2/g and negligible heavy metals presence with abundance of Silicon and Oxygen as compounds.

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Climate Change in Chile: An Analysis of State-of-the-Art Observations, Satellite-Derived Estimates and Climate Model Simulations

Although there is a reasonably large body of work focusing on South American climate, few studies focus on just Chile and even fewer consider climate processes operating over longer timescales, such as those at which climate change becomes apparent.

This paper provides an overview of Chilean present-day and future climate, needed to plan for potential impacts of climate change. Firstly, present-day climate conditions are assessed using a number of observational rainfall and temperature datasets.

All available GCMs are then examined, to firstly assess their ability to simulate climate during the end of the 20th century and secondly to examine their projections during the 21st century.

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Isolation of Marine Bacteria From Visakhapatnam Coast For Degradation of Oil

Marine waters are the receivers of many wastes from different sources such as food waste, raw material extraction, recreational use, waste disposal and transportation.

In addition to this ship trafficking and industry releases enormous amounts of oil and grease to waters. The aim of the present study was to isolate bacterial strain from marine waters of Visakhapatnam coastal area in order to a strain suitable for the degradation of oil and grease.

Many bacterial strains were isolated including Aeromonas hydrophilia, Bacillus cereus, Bacillus subtiles, Enterobacter aerogenes, Escherichia coli, Proteus vulgaris, Pseudomonas aeruginosa, Salmonella typhimurium, Staphylococcus aureus. The results showed that the degradation of oil and grease was possible by the application of extracted bacterial isolates.

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Geophysical Assessment of the Upper Dja Series Using Electrical Resistivity Data

The upper Dja series consists of carbonates and shales deposits that date 580 ± 150 Ma. Petrography and mineral chemistry studies helped to differentiate this series into many sequences including massive limestone layers with calcite (CaO3) contents of about 30 to 42%.

In order to determine the subsurface distribution of these sequences, a geophysical prospection campaign was carried out in which a total of 24 vertical resistivity soundings were recorded over a surface area of 9 km2.

The processing and interpretation of data using the IX1D and OpendTect modeling tools permitted the distinction of two massive limestone layers in the upper Dja series.

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