Research Article

Biosorption of Congo Red Dye from Aqueous Solution Using Adsorbent Prepared from Vangueria infausta Fruit Pericarp

Table 5

Adsorption efficiency of untreated and acid-treated VIFP biosorbent (optimum pH of 2, initial CR dye concentration of 10 mg/L, VIFP dose of 0.7 g, and contact time of 180 min).

SampleInitial concentration (mg/L)Final concentration (mg/L)SDAdsorption (%)

Untreated VIFP104.771.0650.3
Acid-treated VIFP100.770.6492.3