International Journal of Waste Resources

A Study on the effectiveness of Chitosan Phosphate as a stabilizer for soil contaminated with heavy metals

15^th World Congress and Expo on Recycling

October 16-17, 2023 | Vancouver, Canada

Jeong-Hyun LEE and Tai-Ran Yu

University of Seoul, Republic of Korea

Scientific Tracks Abstracts: Int J Waste Resour

Abstract:

Statement of the Problem: The study intends to create an environmentally-friendly stabilizer using chitosan sourced from the chitin found in discarded shells of crabs and shrimps. Chitin contains active components like hydroxyl and amino groups that are useful in eliminating heavy metal ions and bioabsorption. The goal is to assess the effectiveness and performance of the stabilizer and confirm how it affects the stabilization process. Methodology & Theoretical Orientation: To create chitosan phosphorylated, chitosan from Aladdin was bought. Samples were then placed in numerous containers with CTS and P-CTS at ratios of 1%, 3%, 5%, 7%, and 9%. Upon stirring, the soil was sprayed with distilled water to achieve 20% moisture content and left to cure for periods of 1, 5, 10, 20, and 30 days. A subsequent experiment was conducted to measure elution of heavy metals to assess the stabilizer's effectiveness. Findings: Cu and Pb from the control group, as well as the experimental groups injected with CTS and P-CTS, were extracted in an SM&T experiment. The comparison of the control group to the soil that received P-CTS injection revealed that the Cu ion exchange form had a significant share, while the residual form increased from 9% to 14%. The control group showed a considerable presence of the Fe-Mn oxide binding form in the ion exchange form, but the injected soil exhibited an evident rise in the residual form from 2% to 7%. Ultimately, P-CTS decreased the mobility and biological impact of Cu and Pb in heavy metal-contaminated soil, thus stabilizing it. Conclusion & Significance: Using P-CTS as a stabilizer is anticipated to be advantageous due to its cost-effectiveness through the utilization of waste resources and enhanced efficiency compared to CTS. Consequently, P-CTS is deemed a fitting stabilizing agent.

Biography :

Deanna Mulvihill has her expertise in evaluation and passion in improving the health and wellbeing. Her open and contextual evaluation model based on responsive constructivists creates new pathways for improving healthcare. She has built this model after years of experience in research, evaluation, teaching and administration both in hospital and education institutions. The foundation is based on fourth generation evaluation (Guba& Lincoln, 1989) which is a methodology that utilizes the previous generations of evaluation: measurement, description and judgment. It allows for value-pluralism. This approach is responsive to all stakeholders and has a different way of focusing.