Biochar is mainly used as a soil amendment and for carbon sequestration; while other applications such as environmental remediation may be equally important. Recently, different engineering methods have been developed and used to expand biochar's applications. A systematic literature review on the linkages between the production methods and applications of engineered biochar, therefore, is in critical need. In this work, the production and application prospects of engineered biochar are reviewed comprehensively based on the current literature. The application values and effect of engineered biochar in energy, environment, and agriculture are also expounded. Different from previous ones, this review is more focused on the unique properties and functions of various types of engineered biochars to explain their potential application, particularly environmental application. It not only summarizes recent advances in engineered biochar technology but also offers insights on new directions for development and research of engineered biochar in the future.

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