Synthesis of ZnxNi1-xFe2O4, MnxNi1-xFe2O4, MgxNi1-xFe2O4, CuxNi1-xFe2O4 and CaxNi1-xFe2O4 via co-precipitation method and their application for treatment of textile wastewater

The discharge of synthetic dyes imparting serious consequences on life. Therefore, an environment-friendly co-precipitation method was utilized to prepare the nanocomposites of doped Nickel ferrite as novel adsorbents for eradication of DB-199 dye. The maximum pH for synthesized Zn x Ni 1-x Fe 2 O 4 , Mn x Ni 1-x Fe 2 O 4 , Mg x Ni 1-x Fe 2 O 4 , Cu x Ni 1-x Fe 2 O 4 and Ca x Ni 1-x Fe 2 O 4 were reported to be 2 and 3 with 0.05 g/50 mL maximum adsorbent dosage of synthesized doped Nickel ferrite respectively. The optimum contact time was found at 60 min and 45 min. The maximum initial concentration of DB-199 Dye and the respective adsorption capacity for Zn x Ni 1-x Fe 2 O 4 , Mn x Ni 1-x Fe 2 O 4 , Mg x Ni 1-x Fe 2 O 4 , Cu x Ni 1-x Fe 2 O 4, and Ca x Ni 1-x Fe 2 O 4 was found 50 mg L 1- (33.169 mg g 1- ), 75 mg L 1- (48.610 mg g 1- ), 75 mg L 1- (46.657 mg g 1- ), 50 mg L 1- (31.150 mg g 1- ) and 75 mg L 1- (44.840 mg g 1- ) were acquired. All the adsorbents Zn x Ni 1-x Fe 2 O 4 , Mn x Ni 1-x Fe 2 O 4 , Mg x Ni 1-x Fe 2 O 4 , Cu x Ni 1-x Fe 2 O 4, and Ca x Ni 1-x Fe 2 O 4 showed their optimum absorption 32.833 mg g 1- , 38.892 mg g 1- , 36.939 mg g 1- , 30.880 mg g 1- and 34.852 mg g 1- respectively at 30 ºC. Among the applied Kinetics models, pseudo-first-order and pseudo-second-order while isotherm models, Langmuir and D-R models showed satisfactory fitness. The adsorption process for doped nickel ferrite nanoparticles was found to be exothermic in nature.