At 120 min, the removal efficiencies of Pb, Zn, Cu and P
were 97%, 76%, 81% and 97%, respectively, with the corresponding
adsorption capacities of 9.74 mg Pb/g WTR, 61.07 mg Zn/g WTR,
8.14 mg Cu/g WTR, and 0.22 mg P/g WTR. Results of control tests
(uncoated mulches) are shown in Fig. 3 (b). At any specific time,
uncoated mulches provided lower Pb and Cu removals than and a
comparable adsorption for Zn with WTR-coated mulches.