David A Dunn

Title: David A. Dunn: Innovator in Waste Treatment Solutions

Introduction

David A. Dunn is a notable inventor based in Santa Ana, CA (US). He has made significant contributions to the field of waste treatment, particularly in the area of metal plating solutions. His innovative approach has led to the development of a process that not only addresses environmental concerns but also promotes sustainability.

Latest Patents

David A. Dunn holds a patent for a method titled "Waste treatment of metal plating solutions." This invention presents an efficient and economical process for treating spent metal plating solutions, primarily focusing on spent electroless nickel solutions. The process significantly reduces the metal content, allowing for direct discharge into municipal water systems without violating legal regulations. The waste treatment involves a sequential two-step chemical precipitation process, where dissolved metal content is first precipitated by sodium borohydride reduction, followed by sodium dimethyldithiocarbamate precipitation. An intermediate filtration step and pH adjustment are included to enhance the effectiveness of the treatment. The process produces minimal metal-bearing sludge, and the majority of metals in the sludge can be recovered and reused, leading to a substantial reduction in hazardous waste disposal costs.

Career Highlights

David A. Dunn is associated with Morton International, Inc., where he has applied his expertise in waste treatment technologies. His work has been instrumental in advancing the company's capabilities in environmental management and sustainability practices.

Collaborations

Throughout his career, David has collaborated with several professionals, including Celia L. Alexander and Anthony M. Mariniello. These collaborations have contributed to the development and refinement of innovative waste treatment solutions.

Conclusion

David A. Dunn's contributions to waste treatment technology exemplify the importance of innovation in addressing environmental challenges. His patented process not only enhances efficiency but also promotes the recovery and reuse of valuable metals, showcasing a commitment to sustainability.