Founding Editor: Prof. Dele Ogunseitan
Abbreviation: Afr. J. Environ. Sci. Technol.
Start Year: 2007
Page 1 of 43, showing 20 records out of 843 total, starting on record 1, ending on 20
DOI: 10.5897/AJEST2017.2319[Article Number: 00DE37E64760]
Increased population pressure and environmental stressors have amplified research on water quality both locally and globally. In Tanzania, water quality assessment is a mature discipline, with an over four-decade history. In this article, studies on water quality assessment in Tanzania from 2006 through 2016 are reviewed. The approach used is to scan selected publications to gather data and information on types and... Read more.
DOI: 10.5897/AJEST2017.2315[Article Number: 820835664764]
Ranches of Mexico’s southeast region have an important energetic potential on their organic waste that remains unexploited. The objective of this work is to present the construction and operation of a floating dome “Biodigester” in a ranch located in Jalapa, Tabasco, Mexico, in addition to the analysis of produced biogas and its electric energy generation. The construction was based in the... Read more.
DOI: 10.5897/AJEST2016.2220[Article Number: 522E2AE64766]
Aflatoxin is a major food contaminant, with adverse effects on the physiology of both humans and animals. Exposure to aflatoxins has been known to pose a great threat to both humans and animals, particularly, in the tropics, with varied pathophysiological effects. This research focused on the effects of aflatoxin BI on the pituitary-gonadal axis of pigs, an area that has not fully been investigated since most studies... Read more.
DOI: 10.5897/AJEST2016.2246[Article Number: A5F2D5164768]
The presence of hydrogen sulfide (H2S) and ammonia (NH3) in biogas pose serious human health and environmental challenges. In this study, H2S and NH3 were successfully removed from biogas using water hyacinth-derived carbon (WHC) nanomaterials. Carbonization temperature, biogas flow rate, mass of the adsorbent and activating agent (KOH/water hyacinth (WH)) ratio were found to greatly influence the efficiency of the H2S... Read more.
DOI: 10.5897/AJEST2017.2327[Article Number: 019E18F64770]
Land use-land cover (LULC) is a vital phenomenon for the understanding interactions between the environment and human activities. In order to study and manage the resultant changes, it is pertinent to map different themes from time to time. The study focuses on the effect of the location of cement factory on land use-land cover in Obajana Community, Lokoja Local Government Area Kogi, Nigeria. The study employed... Read more.
DOI: 10.5897/AJEST2017.2299[Article Number: 3A7852A64341]
The historical lakes of India are getting over burdened with the loads of pollution due to the rapid growth of small scale industries, nutrient enrichment and other anthropogenic activities. The high concentrations of metals in the water bodies, their entry into ecological food chain and the resulting health effects are of great concern to the researchers in the areas of ecology. Due to the problems associated with the... Read more.
DOI: 10.5897/AJEST2013.1438[Article Number: 0574E2864343]
Power transmission lines in forest regions like the southern parts of Cameroon are subjected to numerous failures arising from natural hazards, including earth faults and line ruptures provoked by swaying or falling neighbouring trees and their branches. To pre-empt this problem, those trees which represent a potential threat to the operation of the power line must be eliminated. Deforestation during line construction... Read more.
DOI: 10.5897/AJEST2016.2264[Article Number: A02C9AA64350]
Cyanide is a chemical that is widely distributed in the environment, mainly as a result of anthropogenic activities. Only small quantities are naturally produced. Most industrial activities use this chemical compound for manufacturing a product as electroplating or for extracting gold. Exposure to cyanide results in negative health impacts to the wildlife and humans. In nature, cyanide occurs in several species and... Read more.
DOI: 10.5897/AJEST2016.2207[Article Number: 21144A864359]
The ecosystem services of encroached urban wetlands that receive wastewater and surface run-offs have become more challenging due to climate variability. Our study assessed the seasonal macrophyte diversity and water quality of the streams flowing into and out from Pece wetland in Gulu Municipality. The macrophyte species in the wetland were sampled along five transects. Water samples from the streams were also... Read more.
DOI: 10.5897/AJEST2017.2308[Article Number: 99368D264363]
Relatively few studies have explored how resilience of water, sanitation and hygiene (WASH) systems to hazards can be enhanced under the current and future development and climatic challenges pressures in urban areas. This study employed the citizen science approach to build the capacity of citizens and integrate communities into scientific research on water quality and WASH related risk monitoring. Data was collected... Read more.
DOI: 10.5897/AJEST2014.1799[Article Number: 3A1151364366]
Geoelectrical logging was conducted in two well locations in Ubima community, Niger Delta, Nigeria. Self-Potential (SP) and Resistivity (Short Normal and Long Normal) logs were employed. Two points each in wells 1 and 2, respectively, were tested to determine the porosity (ɸ), permeability, k and the total dissolved solids (TDS) in the aquifer by derivation from electrical conductivity (EC). The results show that for... Read more.
DOI: 10.5897/AJEST2015.2042[Article Number: CD305C364371]
This study investigated the effect of bacterial pollution on ground water quality in Enugu urban areas. During the study, samples were collected from ten (10) hand-dug wells (W1-W10c). Five (5) hand dug wells out of ten (10) were used as control. All samples were taken according to methods described by Federal Ministry of Water Resources (2004). Membrane filtration (MF) method was used to enumerate total coliforms (TC),... Read more.
DOI: 10.5897/AJEST2017.2305[Article Number: 022BE1B64383]
A pilot scale anaerobic sequencing batch reactor (ASBR) was operated at different organic loading rate (1.03, 1.23, 1.52 and 2.21 kg.m-3.d-1) in order to determine the chemical oxygen demand (COD) removal and methane production kinetic models. The system was operated at mesophilic temperature. The wastewater was fed using submersible pump in every twenty four hours and agitated with hydraulic pump for fifteen minutes in... Read more.
DOI: 10.5897/AJEST2016.2284[Article Number: DC71BD363890]
Despite the role that rural women in Nigeria play in protecting the environment, not many studies acknowledge their contributions. As part of efforts to highlight women’s contributions, this study interviewed 60 women between the ages of 20 to 60 on how important the environment is to their livelihood and how they protect it. Fifty percent (50%) of the women identified as farmers, forty percent (40%) as traders,... Read more.
DOI: 10.5897/AJEST2016.2248[Article Number: EBC800663892]
Human activities such as agriculture, construction of houses and automobile workshops and natural processes alter the properties of soils and water which affect the health of plants, animals and humans. This work was therefore, aimed at investigating some physicochemical properties of soils and some water sources on the Western Flank of Mount Cameroon with altitude and selected natural and/or anthropogenic activities.... Read more.
DOI: 10.5897/AJEST2016.2141[Article Number: 759E8E064123]
In this study 14 soil samples were measured for natural radioactivity levels including radon-222 (222Rn) and radon-220 (220Rn) concentration at Akyem-Gold Mine premises, surrounding communities in Ghana. Both radon and radioactivity concentrations of radium-226 (226Ra), thorium-232 (232Th) and potassium-40 (40K) were determined by means of gamma spectrometry system equipped with high purity germanium detector. The... Read more.
DOI: 10.5897/AJEST2017.2304[Article Number: D99AE6364125]
Over the last decades, the world production of cigarettes has increased considerably. However, the industrial production generates large quantities of colloidal effluents consisting of toxic and recalcitrant compounds. Thus, taking account the colloidal aspect of the effluent and the persistence of some compounds, this study aims at coupling chemical coagulation and photodegradation on titaniferous sand to treat... Read more.
DOI: 10.5897/AJEST2014.1792[Article Number: D43CEA763346]
It is very necessary for clay shale layer to slake for durability. The identification and classification of clayshale should be considered based on slope design. Several locations of clayshale slopes were stable during the construction of Cipularang Highway 97 + 000 km, West Java, Indonesia. However, they experience landslides after some time. Therefore, material properties and shear strength characteristics of... Read more.
DOI: 10.5897/AJEST2016.2272[Article Number: CB4E7F363354]
The use of iron (Fe) (III) salts as fluoride coagulants in water is challenged by the requirement of high pH for maximum efficiency. At their natural pH, these salts have low fluoride removal efficiency. This study examines the effect of amaranth plants on enhancement of the defluoridation efficiency of Fe (III) salts as coagulants. Amaranthus hybridus plants were suspended in fluoride water treated with varying... Read more.
DOI: 10.5897/AJEST2016.2243[Article Number: 1FB6E1563351]
Coffee processing is associated with various sustainability challenges largely due to high water and energy demand, biomass waste generation and lately low returns to farmers. The number of farmers actively involved in coffee production in Kenya is declining. Despite this trend, this paper reports on the potential of maximising benefits to coffee farmers by using coffee processing wastes (pulp and husks) in energy and... Read more.
Page 1 of 43, showing 20 records out of 843 total, starting on record 1, ending on 20