Achieving the safe use of Cd- and As-contaminated agricultural land with an Fe-based biochar: A field study

A field study was conducted to investigate the effect of Fe-based biochar application on the extractability and availability of Cd and As, as well as its impact on crop growth and yield under a two-years wheat-rice rotation system. The Fe-based biochar was applied to the soil at 1.5 and 3.0 t ha–1, manure compost was also applied as a comparison, as well as a non-treated control. The application of the Fe-based biochar significantly (p