Biosorbent Efficacy of Groundnut Husk for the Elimination of Chromium from the Effluent of Mojo Tannery Industry, Ethiopia

Table 1

Physicochemical characteristics of untreated tannery effluent.

Parameters	Detected value	WHO standard for drinking water (a)	NEQS limit discharge (b)	Remarks
Color	Blue-gray	Aesthetic value	—	—
Odor	Foul smell	Aesthetic only	—	—
pH	3.40	6.5–8.5	6–9	Exceed both a and b
TDS	1400 mg/L	600–1000 mg/L	3500	Exceed a
(EC)	1342 μS/cm	Less than 400 μS/cm	—	Exceed a
Total chromium (Cr)	12.25 mg/L	0.05 mg/L	1 mg/L	Exceed both a and b
Lead (Pb)	0.17 mg/L	0.01 mg/L	0.5 mg/L	Exceed a