Effects of phosphorus-rich sawdust biochar sorption on heavy metals
Luo Yang, Wen-fa Tan, Kathryn Mumford, Lei Ding, Jun-wen Lv, Xiao-wen Zhang, Hong-qiang Wang
Separation Science and Technology | TAYLOR & FRANCIS INC | Published : 2018
The aim of this paper is to study the efficiency of typical heavy metals in electroplating sludge in terms of different phosphorus dosages (0.5 wt.%, 1 wt.% and 3 wt.%), initial pH (2, 3, 4, 5 and 6) and adsorption times (1, 3, 5, 7 and 12 h) of biochar. The heavy metal speciation was determined after adsorption to estimate the stability of ion-adsorption precipitation. Results show that phosphorus-modified biochar enhances the removal efficiency of heavy metals. Low mobility of heavy metal speciation was investigated. It is also shown that initial pH has a significant impact on the heavy metal speciation after adsorption.