Table 4.

PHL compositions at different treatment stages (g/L).

PHL	Xylose	XOS	Total Xylosugars	Lignin	Furfural	Acetic Acid
Original PHL	1.73	10.10	11.83	5.07	0.63	1.55
CH treated PHL	1.69	10.05	11.74	3.33	0.28	3.50
CH+AC treated PHL	1.66	9.47	11.13	1.68	0.19	3.47
Removal (%)	4.0	6.2	5.9	66.9	70.1	-

Note: The optimal conditions were 0.6% dosage of CH (based on the weight of the original PHL) and 0.4% dosage of AC (based on the weight of the CH-treated PHL) in the combined treatment process.