Treatment of Mixed Azo Dyes in an Aerobic Sequential Batch Reactor and Toxicity Assessment Using Vigna radiata

Table 4

Phytotoxicity study using green gram with wastewater containing (a) 100 mg/L of mixed dyes, (b) 500 mg/L of mixed dyes, and (c)1000 mg/L of mixed dyes.

(i) Concentration of mixed dyes (100 mg/L)	Root length (cm)	Shoot length (cm)	Germination percentage
Distilled water	3.28	19.25	100%
Untreated wastewater	2	12.94	70%
Treated wastewater	6.6	16.2	100%
(ii) Concentration of mixed dyes (500 mg/L)	Root length (cm)	Shoot length (cm)	Germination percentage
Distilled water	3.2	16.13	100%
Untreated wastewater	1.22	7.7	60%
Treated wastewater	3.96	18.28	100%
(iii) Concentration of mixed dyes (1000 mg/L)	Root length (cm)	Shoot length (cm)	Germination percentage
Distilled water	2.26	13.76	100 %
Untreated wastewater	1.66	11.33	60 %
Treated wastewater	2.77	17.23	100 %