Preparation of Tetra Pak-Based Hydrochars for Cleaning Water Polluted by Heavy Metal Ions: Physicochemical Properties and Removal Mechanism

Table 1

Hydrothermal carbonization conditions used to obtain Tetra Pak-based hydrochars.

Hydrochar sample	Hydrothermal carbonization
	Temperature (°C)	Dwell time (h)
TP1	180	6
TP2	180	12
TP3	180	18
TP4	200	6
TP5	200	12
TP6	200	18
TP7	230	6
TP8	230	12
TP9	230	18