Strychnos potatorum

About: Strychnos potatorum is a research topic. Over the lifetime, 129 publications have been published within this topic receiving 1830 citations.

In Vitro Antimicrobial Screening of Alkaloid Fractions from Strychnos potatorum

Abstract: Alkaloid fractions isolated from Strychnos potatorum L.f. (Loganiaceae) seed were tested for their antimicrobial properties against some pathogenic gram positive, gram negative and acid-fast bacteria and fungi. These fractions have shown considerable antimicrobial activity against both bacteria and fungi at the tested concentrations (100 & 200 μg/mL). Further, the growth of Proteus vulgaris, taphylococcus aureus, Salmonella typhimurium, Vibrio cholerae, Mycobacterium tuberculosis, Aspergillus niger and Candida albicans were significantly inhibited. These findings have confirmed the use of this plant in treating of several microbial infections both in traditional and folk medicine in India.

Evaluation of eco-friendly coagulant from Trigonella foenum-graecum seed

Abstract: The ability of seed extracts of Trigonella foenum-graecum (T. foenum-graecum) and Cuminum cyminum (C. cyminum) to act as natural coagulants was tested using natural turbid water. Seed extracts were prepared using distilled water and NaCl (0.5 M and 1.0 M) solution. Only 1.0 M NaCl extract of T. foenum-graecum had coagulation capability and did not depend on pH values. Further it showed that natural coagulant obtained from T. foenum-graecum is temperature (upto 100?C) and pH stable (pH 4.0 - 10.0). Extract of C. cyminum had very minimal (16 ± 2) coagulation property. The seed extract of T. foenum-graecum showed about 80% coagulation properties, where as the best known natural coagulants such as Strychnos potatorum and Moringa oleifera, and chemical coagulant such as Al2(SO4)3 showed around 90%, 65% and 95% respectively, which are used as standards for the present study. When compared with pond water, T. foenum-graecum extract treated water shows decrease in alkalinity, turbidity, KMnO4 demand and total coli-form. This study reveals that seed extract of T. foenum-graecum can be used as natural water coagulant.

Adsorption of Cu(II), Cd(II) and Ni(II) ions from aqueous solution by unmodified Strychnos potatorum seeds

Abstract: In this study, the unmodified Strychnos potatorum seeds were examined as an adsorbent to remove the metal ions such as Cu(II), Cd(II) and Ni(II) ions from their aqueous solutions. The surface properties of the adsorbent were analysed by FTIR and scanning electron microscopy analyses. The adsorption experimental parameters which affect the adsorption process such as pH, adsorbent dose, initial metal ions concentration, contact time and temperature were studied. Adsorption isotherm experiments indicated that the Freundlich adsorption isotherm model displayed the best coefficient of determination values. A single-stage batch adsorber was designed to estimate the amount of adsorbent required to treat the known volume of the wastewater by using the Freundlich adsorption isotherm model. From the Langmuir adsorption isotherm model, the maximum monolayer adsorption capacity of the adsorbent for Cu(II), Cd(II) and Ni(II) ions was found to be: 8.649, 7.023 and 5.140 mg/g, respectively. The adsorption kinetic result...

Removal and recovery of Ni(II) ions from synthetic wastewater using surface modified Strychnos potatorum seeds: experimental optimization and mechanism

Abstract: Strychnos potatorum seeds have been utilized for the preparation of adsorbent, surface modified S. potatorum seeds (SMSP), by sulfuric acid treatment with 1:2 ratios of precursor to sulfuric acid. The adsorption process depends on the solution pH, adsorbent dose, contact time, initial Ni(II) ions concentration, and temperature. The adsorption kinetics of Ni(II) ions removal by the SMSP was relatively fast and it reaches the equilibrium at 30min. The maximum removal of Ni(II) ions was observed at an optimum conditions: pH of 5.0, adsorbent dose of 5g/L, contact time of 30min, and at temperature of 30˚C for an initial Ni(II) ions concentration of 100mg/L. In order to investigate the adsorption kinetics for the removal of Ni(II) ions by SMSP, pseudo-first-order and pseudo-secondorder kinetic models were studied. It was observed that the pseudo-second-order kinetic model fits the experimental data better than the pseudo-first-order kinetic model with good coefficient of determination values. Adsorption mechanism was discussed with different models such as intraparticle diffusion, Boyd kinetic, and shrinking core models. It was observed that the adsorption process was controlled by both film and particle diffusion. The effective diffusivity and diffusivity values were estimated from the Boyd kinetic and shrinking core models, respectively. Adsorption isotherm data were tested with the Langmuir, Freundlich, Temkin, and Dubinin‐Radushkevich models. It was observed that the Freundlich model fits the isotherm data better than other isotherm models with good coefficient of determination values. The Freundlich constant “n” was found to be of 3.888g/L which indicates that the adsorption of Ni(II) ions onto the SMSP followed the physical process. The thermodynamic parameters such as change in free energy, enthalpy, and entropy were also calculated. It was found that the adsorption process was spontaneous and exothermic in nature.