Use of Moringa (Moringa Stenopetala) Seed Extract for Removal of Some Anionic Dyes (Direct and Reactive Dyes) in Textile Wastewater

Abstract

With textile wastewater being one of the most sources of pollution containing higher value of colour, BOD, COD and several pollutants, brings serious problem to the ecological environment. This study is particularly focused on evaluating the efficacy of removal of dyes such as reactive dyes, direct dyes, mixture of dye wastes and mixture of industrial and dye wastewaters by the natural absorbent Moringa. The seeds of the Moringa tree contain a coagulant protein that can be used in the treatment of industrial wastewater. The extracts of seeds (coagulant) obtained by two methods viz. simple extraction with distilled water and with saline water have been used for the study. The effect of some operating parameters on coagulation namely pH, coagulant dosage, mixing time, colour removal and turbidity was studied. It was observed that the colour removals in direct red and reactive red dyes are 94.45 and 98.4% respectively with simple extract of seeds done with distilled water and it was in the order of 96.6 and 97.3% respectively with saline extracts of the seed. These values of colour removal of dyes are optimized at 70ml/L of coagulant and pH 10. The mixture of industrial wastewater and dye wastes, colour removal and turbidity removal was 85.8% with simple extract and 53% with saline extract respectively at optimized point. Moringa stenopetala seed has demonstrated to have high removal ability for anionic dyes.

Bacterial Removal Efficiency of Moringa stenopetala and Cadaba farinosa From Surface Water: Laboratory-Based Cross-Sectional Study

“…23 The seed kernels and dried leaves were ground into a medium-fine powder with a local mill to achieve solubilization of active ingredients in the seed. 26 These crushed kernels and leaves were sieved using a sieve size of <300 μm. 34 Then, the powders of the leaf and seed were packed in a small plastic bag separately for safety (as seen in Figure 2) and kept in the laboratory under an ambient temperature of 22°C to 25°C and stored in a desiccator to create and maintain a dry environment until treatment and analysis.…”

“…1 There are factors identified by different scientific researches like turbidity, pH, contact time, settling time, stirring time, temperature, and dosage/concentration that might affect the treatment efficiency of natural plants in reducing microbes or turbidity or heavy metals from water. 1,22,24,[26][27][28] The effect of turbidity, pH, settling time, temperature and dosage were considered in this study. Mixing/stirring time plus settling time is equal to contact time-based on this study.…”

Wastewater treatment using a natural coagulant (Moringa oleifera seeds): optimization through response surface methodology

“…These findings were in line with previous research findings, which revealed that treating water samples with MO seed cake reduced turbidity (Ghebremichael et al, 2005;Nand, 2012;Shan et al, 2017;Sotheeswaran et al, 2011). According to Govindan (2018), color and turbidity removal effectiveness of up to 98.4 percent and 84.3 percent respectively was achieved employing 70 mg/L coagulant extract of Moringa Stenopetala. Garde et al (2017) discovered that utilizing 0-0.4 g/L of coagulant dose resulted in 1-25 percent COD removal.…”