Ken D. Thomas

Handbook of Research on Pedagogical Innovations for Sustainable Development

Education is a key component for progress in both the developed and developing world. It is imperative that society has access to new strides made in the area of sustainability so that current global challenges are resolved. Handbook of Research on Pedagogical Innovations for Sustainable Development brings together case study examples in the fields of sustainability, sustainable development, and education for sustainable development. This book will be an essential reference for educators, teachers, trainers at all levels of education, sustainable development practitioners, education policy makers, and the public at large.

Adsorption of arsenic onto Kemiron in a landfill leachate

Samples of Class I landfill of North Central Polk County contained high level of arsenic (As) above 10 µg L−1, the permissible concentration levels in drinking water. By the method of addition, it was determined that the natural leachate samples contained 29 ± 2 µg L−1 of dissolved As and 126 ± 6 µg L−1 of total As. The sorption capacity of Kemiron fell from 85–90% of the initial 5 mg L−1 As(V) concentration in DI water to 40–50% of 1 mg L−1 initial As(V) concentration in the real landfill leachate system. The age of the landfill leachate exerted no significant influence on the sorption density of As(V) onto Kemiron. There were however small changes in the sorption density of As(III) onto Kemiron. The presence of selenite Se(IV) was the main controlling component in terms of the sorption density of the adsorption of As in the synthetic landfill leachate. Ca2+, –N, , and ions exerted no significant impact on the sorption density of As onto Kemiron. The oxidation reduction potential (ORP) and pH were the most influencing elements besides Se(IV) in the sorption of As onto Kemiron. Changes of ORP also produced changes in pH of the solution systems. In the experiment, the maximum As(V) sorption density acquired was 47.5 mg As g−1 Kemiron at the following: ORP of 320–350 mV at pH of 7–8, ORP of 200 mV at pH of 8, or at ORP of −300 or 0 mV and at pH of 11.

Cases on the diffusion and adoption of sustainable development practices

Organizations and businesses are applying sustainable development concepts in their management strategies in order to improve and rethink products, processes, services, and policies which will have significant potential to reduce carbon dioxide emissions, excess consumption, and improve the quality of lives. Cases on the Diffusion and Adoption of Sustainable Development Practices is a collection of case studies on the concepts and theories of successful sustainable practices. It also identifies key mechanisms and strategies that have allowed the successful diffusion of these practices into communities, regions and nations around the world. This reference source is essential for professionals, researchers, educators and leaders in pursuit of innovative solutions in sustainable development.

Adsorption of Arsenite onto Kemiron

This study investigated the effect of pH and coexisting ions on As(III) adsorption using batch experiment and discovered that pH strongly influenced As(III) adsorption. However, differences in background ionic strengths of 0.001 N NaNO 3 and 0.1 N NaNO 3 had no effect on the sorption trend. The isotherms followed Freundlich model with Kf of 27.91, 35.67, and 43.76 (mg/g)(L/mg)n at pH 6, 7, and 9 respectively. The kinetic studies showed D app values of (6.52 ± 0.024) × 10 -7 cm 2 /s and (6.22 ± 0.043) × 10 -7 cm 2 /s for the 38 μm and 500 to 600 μm particle sizes. The biot numbers of the sorption derived were 1.84 × 10 -2 and 5.89 × 10 -1 respectively. The presence of CO 3 2- had more impact than SO 4 2- ion but the presence of 300 mg/L NH 4 + - N had no significant impact on As(III) adsorption between pH 4 and 8 and so was the presence of 0.1 mg/L Ca 2+ ion between pH 4 and 6.5. However, about 10% loss of the sorption capacity of Kemiron occurred between pH 6.5 and 9 in the presence of Ca 2+ ion. The presence of 5 mg/L Ni(II) and Se(IV) also showed that Se(IV) was a stronger inhibitor of As(III) sorption than Ni(II). Keywords : Arsenite, ground water, Freundlich, diffusion coefficient, Ghana.