Daun bambu digunakan untuk pengolahan emas dalam bentuk senyawa secara amalgamasi. Variasi waktu yang digunakan untuk proses amalgamasi adalah 24 jam, 48 jam dan 72 jam. Uji-t dilakukan untuk mengetahui perbedaan antara metode amalgamasi penambahan daun bambu dan tanpa daun bambu. Hasil penelitian menunjukkan bahwa penambahan daun bambu dapat meningkatkan perolehan emas. Kadar logam emas (Au) secara amalgamasi tanpa daun bambu diperoleh sebesar 0,09 ppm, sedangkan  amalgamasi dengan daun bambu memiliki kadar tertinggi sebesar 0,28 ppm. Kadar emas optimum sebesar 0,28 ppm artinya kadar yang diserap daun bambu sebesar 0,28 gram/ton. Variasi waktu proses amalgamasi berpengaruh terhadap hasil amalgamasi. Hasil terbanyak diperoleh pada proses amalgamasi selama 48 jam. Ada perbedaan yang signifikan antara kadar emas yang diperoleh dengan proses  amalgamasi penambahan daun bambu dan tanpa daun bambu. Kata kunci: amalgamasi,daun bambu, uji-t

Leachate as a result from waste decomposition at landfills potentially contain toxic materials, including metals and organic matters. This leachate produces several environmental issues, including groundwater and surface water resources contamination. The landfill leachate can penetrate to the soil, blend with the soil water, flow to the soil surface, and then disembogue at the river channel. The contamination processes will vary depending on the contaminating substances and their degradation zone. Our study focused on analyzing sulfide and ammonia in the leachate. The sulfide and ammonia degradation zone have been determined by measuring the concentration of sulfide and ammonia using Spectro quant NOVA 60. The degradation zone determination ranged from the distances: 0 m, 50 m, 100 m, 150 m, and 200 m direct to the north, south, and west, and at distances of 0 m and 400 m in the east direction. The range of degradation zone based on the concentration of sulfide, ammonia, and DO (dissolved oxygen) was in a range between 150 m and 200 m from the leachate water reservoir located at TPA Pakusari (Pakusari Landfill) Jember.