Treatment of Heavy Metal Wastewater by Straw Biochar: Current Knowledge and Future Perspectives.

Straw biochar, as an emerging adsorbent, boasts advantages such as abundant availability, renewability, and cost-effectiveness, making it highly promising in treating heavy metal wastewater. This paper presents a comprehensive review of the preparation methods for straw biochar materials, delves into the adsorption mechanism of straw biochar for heavy metals, discusses its application in heavy metal wastewater treatment, and also highlights areas for further in-depth research, including the adsorption mechanism, adsorption capacity, and regeneration performance, in lights of existing challenges in their preparation and application. This paper deepens the scientific understanding of the action mechanism of straw biochar in heavy metal wastewater treatment, and provides an important reference for the development of straw biochar materials and application of straw biochar materials in the purification of heavy metal wastewater. [ABSTRACT FROM AUTHOR]