Analysis of the Application of Sludge BC in the Removal of Organic Dyes from Wastewater

Abstract

With industry development, wastewater discharge has triggered serious environmental pollution problems, especially the most prominent in the dye industry. Biochar(BC) adsorption is a cost-effective means of wastewater treatment and can achieve sludge resourcing, which has become a hot research topic. This paper summarizes the adsorption mechanism of BC. It focuses on various factors affecting the adsorption performance of BC, covering the performance characteristics of BC itself, such as pore size and specific surface area, as well as the dosage of adsorbent and adsorption time during the operation process, and also the effects of the initial pollutant concentration and pH value. In addition, the optimal preparation process of sludge BC and its applicable conditions are summarized. The paper also describes the performance deficiencies of sludge BC in practical applications and the pollution problems caused by it and summarizes the current modification methods for sludge BC. This review provides a reference for the application of sludge BC and its improvement for further enhancement in the field of environmental protection.