بررسی اثر دمای پیرولیز بر کیفیت بیوچار ماکروجلبک قهوه ای Padina australis Hauck و ارزیابی کارایی آن در حذف کادمیوم

Biochar is a substance that is rich in carbon and is commonly used to remove or reduce the activity of heavy metals. The ideal temperature, physicochemical characteristics, and impacts of soil amendments were examined in this study. The macroalgae Padina australis Hauck was used to make biochar at three different temperatures: 300, 400, and 500 degrees Celsius. The yield of biochar produced was 70.16%, 66.36%, and 42%, respectively, according to the data. The percentages of organic carbon were 19.33%, 21.12%, and 23.05%, respectively, and the acidity was 8.75, 9.19, and 10.1%. 3.18, 3.83, and 5.5 millisiemens per meter, respectively, were the electrical conductivities. Using 500 degrees Celsius, biochar was created and then applied to contaminated soil. Biochar 500 has an 8-gram level per kilogram and 4.0 milligrams of cadmium per kilogram. Were incorporated into the soil, followed by 0–15 and 30 days of incubation. The findings demonstrated that total carbon rose by 12%, organic matter by 20%, acidity by 1.8%, and electrical conductivity by 2.5 millisiemens per meter as the number of incubation days increased. With the addition of biochar 500, the soil's catalase enzyme activity peaked on day zero at 30 micromoles of hydrogen peroxide per gram-hour, and it peaked on day thirty at 15 micromoles of hydrogen peroxide per gram-hour. On day zero, the soil had 44.0 milligrams of cadmium per kilogram, and on day thirty, it had 21.0 milligrams. Thus, biochar produced at 500 degrees Celsius can deactivate cadmium metal, improve, and stabilize the physicochemical properties