Open Access Original Research Article

The Climatic Condition of Bangladesh: Scenario of Dhaka

Debajani Chakraborty

Asian Journal of Environment & Ecology, Page 1-6
DOI: 10.9734/ajee/2019/v11i230131

Bangladesh’s climate is consisting of medium to high rainfall, high relative humidity, and high temperature. Due to global warming effects, Bangladesh subjected to many kinds of natural disasters. To understand climate change impacts in Bangladesh, one has to understand the climatic condition of this country. In this paper, annual rainfall, average maximum and minimum temperature and relative humidity data were collected and analyzed to understand the climatic condition of the country. It has been seen that, the rainfall rate of this country is decreasing year to year but the temperature is increasing than previous years. The average relative humidity is almost constant.

Open Access Original Research Article

Modeling of Neutral Red Adsorption on Apple Peel Based Activated Carbon

Canan Demir, Halime Yıldız, Ali Rıza Kul, Sıddık Keskin

Asian Journal of Environment & Ecology, Page 1-10
DOI: 10.9734/ajee/2019/v11i230132

Neutral red is used in textile industry as dyestuff. Dyestuffs which remain unchanged throughout the process in the wastewater treatment plants have toxic effects. In this study, removal of neutral red dyestuff from aqueous medium of active carbon obtained from apple peel waste was investigated. For this purpose, the apple peel was pretreated into 2 mm pieces. Chemical Activation of apple peel with ZnCl2 was used in activated carbon preparation. The amount of adsorbed material at different temperatures (25, 35, 45°C) and concentrations (100, 150, 200 ppm)  was determined. In addition to the linear model, 4 different nonlinear models were used to model the adsorbed material. From these models, the best estimate for all temperature values and concentrations gave the cubic model.

Open Access Original Research Article

Environmental Stakeholders' Perceptions of Urban Native Tree Species Values in Abuja City, Nigeria's Federal Capital Territory

J. O. Ihuma, S. Madakan, U. D. Chima

Asian Journal of Environment & Ecology, Page 1-10
DOI: 10.9734/ajee/2019/v11i230133

This study was conducted to investigate the value perceptions of native tree species in urban landscape by three groups of environmental stakeholders – residents, estate developers and construction companies that reside in Abuja, the Nigeria’s Federal Capital Territory. A Multi-Criteria Analysis (MCA) of landscape scale ecosystem functions and services valuation scenarios were used. A total of one hundred and eighty (180) sets of questionnaire were distributed equally among the three stakeholders (60 each) to ascertain their perceptions on the need to protect native tree species by asking them to rank eight reasons why the protection of native tree species is important in urban/city landscape. The reasons ranked were (i) Aesthetics and beautification of environment, (ii) Microclimatic and cooling effect, (iii) Windbreak, (iv) Erosion control, (v) Conservation of native tree species, (vi) Obstruction of view to enhance privacy (vii) Economic value of the species and, (viii) Any other reason. Results showed that Aesthetics and beautification of environment ranked first by a combination of all stakeholders, and also by Estate Developers alone, while Erosion control and Economic value of the species were ranked first by the Residents and the Construction Companies, respectively. Stakeholders’ mean scores for Aesthetics & beautification of environment, Microclimatic & cooling effect, Conservation of native tree species, and Obstruction of view to enhance privacy, varied significantly (p < 0.05) while there was no significant differences in their mean scores for Windbreak, Erosion control, and Economic value of the species. The differences in the stakeholders’ perception of the value of native trees as revealed by the rankings and significant differences in scores for some of the value criteria to a large extent underscore the values they place on them which in turn will influence their attitude towards the conservation and protection of the species. Therefore, the need for effective environmental education and enlightenment campaigns to sensitise all stakeholders on the overall values and roles of native trees in the city, is emphasized.

Open Access Original Research Article

Annual and Seasonal Variation in Artemia Population in Relation to Water Quality Parameters in Lake Galgas in Crimea, Russia

Rudneva Irina Ivanovna, Shaida Valentin Grigor’evich, Sherba Anton Viktorovich, Zav’vyalov Andrei Veniaminovich

Asian Journal of Environment & Ecology, Page 1-9
DOI: 10.9734/ajee/2019/v11i230134

Aim: To study seasonal changes of hydrological parameters of the water and Artemia population status in the hypersaline Galgas Lake in the period of 2017-2019.

Study Area and Duration: The study was carried out in the Crimea, a peninsula on the northern coast of the Black Sea in Eastern Europe in 2017-2019.

Methodology: Water (brine) and Artemia samples were collected monthly from the lake located at the coastal line of the Black Sea. The parameters namely temperature, pH, salinity, Eh, and oxygen concentration of were determined in the water. Artemia population including the developmental stages and the cysts hatching rate of the cysts were measured in different seasons in the study period. The differences in hydrochemical characteristics of the study area in different years and seasons were observed.

Results: The results showed that the hydrochemical characteristics of the study area varied with the climate peculiarities. In summer months 2017, the lake was dried out. In the hot period, the temperature of the air and water was above +30°C, the pH ranged insignificantly, and the oxygen concentration was low. Artemia cysts were found throughout the year, however the nauplii were mostly available during spring and autumn seasons, while the adults were found in spring and summer months.

Conclusion: The study concluded that the changes of the water parameters depended on season and especially on air temperature. The changes of Artemia population were different in examined years and depended on the water characteristics and especially on temperature and oxygen concentration. The obtained results could be helpful for the local climate changes consequences studies and their influence on aquatic biota.

Open Access Original Research Article

Cadmium Sorption by Moringa oleifera Lam.

P. M. A. Santana, A. S. Messias

Asian Journal of Environment & Ecology, Page 1-7
DOI: 10.9734/ajee/2019/v11i230135

Inadequate disposition of industrial waste containing potentially toxic metals in water sources represents a major problem, concerning not only the biota but also to humans. The goal of this paper was to assess the adsorptive capacity of ground Moringa oleifera Lam. seeds as an alternate material to remove the cadmium ion of Capibaribe river waters in Recife, Pernambuco, Brazil, which were adjusted by a CCD experimental design. Measurements of pH and cadmium levels were performed before and after the experimental treatments in compliance with the official methodology. Obtained data from the treatments were statistically analyzed by Statistic program – version 10, using Box Plots technique. Graphics were employed to locate and assess the oscillations of a variable from different data groups. The results pointed the best efficacy of the alternate method employing moringa in removing cadmium in water treatments were: slightly alkaline pH (7.11); contact time between water and moringa of six hours; 01 grams of moringa per water litre. In these conditions there was a reduction in cadmium concentration of 70.28%, proving this alternate methodology not only to be cheap but also easily employed and contributes to diminishing the severe impacts on human health and environment that this metal could cause.