Simultaneously Recovering High-Purity Chromium and Removing Organic Pollutants from Tannery Effluent

Table 3

Properties of the tanned leather.

Sample	Color	Grain tightness	Strength	Fullness	% Cr2O3 in the wet blue; (dry basis)	(°C)
()	Uneven	Poor	Poor	Poor	2.7	71.4
()	Slightly uneven	Slightly poor	Slightly poor	Fair	3.8	89.4
()	Good	Good	Good	Fuller	4.3	95.2
()	Excellent	Good	Good	Fuller	4.9	104.2

Tanned with chrome tanning agent prepared from the untreated chromium waste liquid (); tanned with chrome tanning agent prepared with the enzyme in the work (); tanned with chrome tanning agent prepared with Fenton in the work (); tanned with commercial chromium powder ().