Mono-and Co-Applications of Ca-bentonite with Zeolite, Ca-hydroxide, and Tobacco Biochar Affect Phytoavailability and Uptake of Copper and Lead in a Gold Mine-Polluted Soil.

•Ca-bentonite (CB), zeolite (ZL), Ca-hydroxide (CH), tobacco biochar (TB) were used for metals immobilization•Ca-bentonite (CB) alone decreased the uptake of Cu and Pb by pak choi and maize•Combination of CB with ZL and CH + ZL reduced the uptake of Pb by pak choi and maize•Combination of CB with TB and ZL reduced the uptake of Cu by pak choi and maize•Co-application of CB with CH increased Cu uptake by maize and Pb by pak choi