The specific surface area showed the lowest value for the LIG and TAN samples, indicating the possible formation of aggregates that act by coating and bonding the smaller particles, which reduces their specific surface area. The LIG XRD analysis showed reduced intensity in the clay peaks, suggesti...
After allowing the mixture to settle for 10 min, the pH value of the biochar was determined using a calibrated pH meter. To assess the specific surface area and pore size of the biochar, a Micromeritics ASAP 2460 specific surface area tester (Shanghai, China) was used. The elemental ...