Shang , Xiaoyan, Zhaojie Luo, and Yingmei Li. “Microwave-Enhanced Tea Saponin-Citric Acid Composite Leaching for Remediation of Heavy Metal-Contaminated Soil in Southern Yunnan Mining Areas”. Scientific Journal of Technology 7, no. 12 (December 20, 2025): 103–115. Accessed July 12, 2026. https://sjtechnology.org/index.php/ojs/article/view/278.