Remediation and rehabilitation
of these contaminated soil and hazardous
waste can be achieved by phytostabilization, a longterm
and cost-effective rehabilitation strategy, through
promoting the revegetation to reduce the risk of pollutant
transfer and ecological restoration (Fellet et al.,
2011), although these are difficult without proper soil
amendments (Reverchon et al., 2015). The biochar addition
to contaminated soil and waste rock piles may
increase soil pH, water holding capacity, and soil fertility,
reduce the mobility of plant-available pollutant