Remediation of Remains Place Gold Mining Land Using Boiler Ash and Sludge from Palm Oil Liquid Waste ProcessingHermis Hermis, Sri Mulyati, M. Prayogie Aulia, Ichwana Ichwana, Silmina Simina and Nasrul ArahmanBIO Web Conf., 89 (2024) 01008DOI: https://doi.org/10.1051/bioconf/20248901008