Volume 1 Issue 1
Environmental Justice in Education for Sustainable Development
The Brundtland Report addresses the ethical principles of environmental justice in relation to intragenerational and intergenerational equity as fundamental to sustainable development. This equity is often defined in economic terms, and the working of neoliberal market economy. Simultaneously, democratic or plural space is created in which neoliberal ideas are perpetuated and students are perceived as rational agents. There remains an ethical question as to whether the benefits of sustainable development are meant for humans only, and whether concern for environmental sustainability is limited to environment’s ability to provide natural resources that accommodate social and economic equity.
Bioremoval of Antibiotics by Using Biodegradable Hydrogel Beads from Aqueous Solutions
Tenzing Japhe, Roshanna Paulsingh, Kwonil Ko, Jaehoung Hong, Abel E. Navarro*
Elimination and proper disposal of pollutants of emerging concern are a major challenge in environmental remediation. On the other hand, biodegradable and naturally-occurring materials have been successfully used as adsorbents of inorganic and organic contaminants from solutions with very positive results. This research proposes the use of alginate (AB) and chitosan (CH) hydrogel beads for the bioremoval of antibiotics, which are listed as top priority pollutants in water. Batch experiments were used to determine the experimental conditions at which the uptake of Enrofloxacin (En) and Penicillin G (Pe) antibiotics is maximized.
Use of Spent Tea Wastes-Chitosan Capsules for the Removal of Divalent Copper Ions
Yewoon Choi, Paul Isaac, Saidakbar Irkakhujaev, Md. Emran Masud, Abel E. Navarro*
The growth of metallurgy and metal-mechanic industries demands an intense extraction of metals. This causes the discharge of metal-containing solution to lakes, rivers and oceans. This study proposes the use of hydrogel beads of chitosan and spent tea waste from peppermint teabags in a hybrid composite for the elimination of copper ions from solutions. Chitosan and its hybrid were also cross-linked with glutaraldehyde to improve the chemical and mechanical resistance.
Application of Geotextile Bag Filters in Flow-Through Aquaculture Systems: Solid Waste Management and Water Quality Implication
Xinchao Wei*,Karen M. Buzby, Jennifer J. Hendricks, Aislinn Creel, Kenneth J. Semmens and Roger C. Viadero, Jr
Solids management plays an important role in the optimal aquacultural production and water quality improvement. The geotextile bag filters (GBFs) were used to dewater biosolids from flow-through aquacultural raceways in this study. Jar tests and geotextile cone tests were conducted to determine the polymer flocculant and its optimum dose for GBF application. In the meanwhile, the effect of GBFs on soluble nutrients (N&P) and BOD5 was also evaluated. The solids content in the raw sludge generated from the flow-through aquacultural raceways in this study was highly variable ranging from 234 to 4290 mg/L (or 0.02 to 0.43% solids). GBFs was very effective in capturing the solids in the aquacultural sludge from flow-through raceways and the addition of Hyperfloc 626 polymer improved the solids removal by GBFs from 87.1±6.9% to 97.3±1.9%.
Circadian Timing of Hunger to Avert Obesity: An Environmental Evolutionary Science
This public policy article establishes circadian timing of appetite and nutrient consumption as a working environmental science to feasibly prevent obesity and diabetes. Conventionally, almost all scientific efforts have focused on managing daily amount and type of food intake in programming public nutrition and health. However, a very significant applied environmental science, emerging recently, is timing of appetite and eating different nutrients over the circadian 24-h period.
Effects of Metal Contamination on Physical-Chemical Properties and Microbial Activities in Phragmites Australis Cav. Rizosphere along the Sarno River (Italy)
The Sarno River is one of the most polluted rivers in Italy (Campania region) marked by the presence of tanneries and skin processing factories located along its course and the large-scale dumping of untreated agricultural and industrial waste, in addition to domestic effluents. The aim of this work is to provide a preliminary analysis of the rizosphere of Phragmites australis Cav., interstitial and above waters. The metal contents (Cd, Cr, Cu, Ni, Pb, V, Zn and Fe, Mn) were evaluated together with their possible relationships with the physical-chemical properties of the rizosphere samples from along the river and its tributaries, which are now almost entirely fed by urban and industrial waste.