Pyrolysis of Chromated Copper Arsenate-Treated Wood: Investigation of Temperature, Granulometry, Biochar Yield, and Metal Pathways

Chromated copper arsenate-treated (cca) wood disposal faces environmental restrictions due to its toxicity, heavy metal leaching in storage sites, and greenhouse gas emissions during incineration. Thus, finding new management methods for this contaminated at the end of life is crucial. This study evaluated effect pyrolysis temperature (300, 400, 500 °C), particle size, biochar yield, behavior arsenic (As), chromium (Cr), (Cu) treated-wood pyrolysis. The highest yield was obtained 300 °C fine particles. retention metals decreased with increasing temperature. At °C, As, Cr, Cu retentions were 76, 91, 83%. only retained 43% As. Additionally, from exceeded Environmental Protection Agency’s (EPA) maximum concentration limit 5 mg/L. High-density polyethylene encapsulation reduced by 96, 95, 91%, respectively. combining plastic produce a composite material could be solution reducing waste (conversion CCA-wood into biochar) safe wood.