en عمومى General مقاله اصیل Original Article <div style="text-align: justify;">Background: Biochar has emerged as a sustainable and cost-effective amendment for remediating heavy metal-contaminated soils. This study investigated the effectiveness of sawdust-derived biochar in reducing lead (Pb) contamination, improving soil pH and organic matter, and its impact on seed germination in Pb-contaminated soil.<br> Methods: A laboratory-scale experiment using a post-test control design was conducted with soils treated with 1%, 4%, and 7% biochar concentrations. Measured parameters included Pb concentrations, pH levels, organic matter content, and germination rates of mung bean seed.<br> Results: Biochar application reduced Pb concentration by up to 98.19% and increased soil pH from 6.2 to 7.45. Organic matter content reached 62.92% at 7% biochar. However, seed germination rates declined at higher concentrations, with the highest germination rate (81.67%) observed at 1% biochar. Differences among treatments were statistically significant (P < 0.05).<br> Conclusion: Sawdust-derived biochar effectively reduces Pb contamination and improves soil pH and organic content, offering a sustainable remediation solution. However, higher application rates may negatively affect seed germination, indicating the need for optimized dosage in future applications.</div> Biochar, Heavy metal remediation, Lead, Soil pH, Organic matter 1 6 http://ehemj.com/browse.php?a_code=A-10-1-401&slc_lang=en&sid=1 Sri Slamet Mulyati srislamet@staff.poltekkesbandung.ac.id 100319475328460021466 100319475328460021466 No Environmental Health Department, Bandung Health Polytechnic, Cimahi, Indonesia Nurul Hidayah nurulh@staff.poltekkesbandung.ac.id 100319475328460021467 0009-0006-0662-3913 No Environmental Health Department, Bandung Health Polytechnic, Cimahi, Indonesia Ade Kamaludin adekamaludin2001@gmail.com 100319475328460021468 100319475328460021468 No Environmental Health Department, Bandung Health Polytechnic, Cimahi, Indonesia Muhamad Iqbal muhamadiqbal@staff.poltekkesbandung.ac.id 100319475328460021469 100319475328460021469 No Environmental Health Department, Bandung Health Polytechnic, Cimahi, Indonesia Salma Aripin salma.aripin@gmail.com 100319475328460021470 100319475328460021470 Yes Corresponding author: Environmental Health Department, Bandung Health Polytechnic, Cimahi, Indonesia