Deepti Rangnani; IJGHC, March 2018 – May 2018; Sec. A; Vol.7, No.2, 327-334.; DOI: 10.24214/IJGHC/GC/7/2/32734.
Metal contamination issues are becoming increasing day by day common in India and elsewhere with many documented cases of metal toxicity in mining industries, foundries, smelters, coal-burning power plants and agriculture. Heavy metals such as Cr, Cu, Zn, Mn, Pb are major environment pollutants therefore it is necessary to treat metal contaminated waste water prior to its discharge to the environment. The absorption process is being widely used by various researchers for the removal of heavy metals from waste streams. Adsorption is suitable even when the metal ions are present in concentration as low as 1 mg/l. The adsorbent may be of mineral, organic or biological origin, zeolites, industrial by product, agricultural waste, biomass and polymeric materials. In the present study dry biomass of Amaltas [cassia fistula] is used as adsorbent to study the process of bio sorption. The cell walls of dry biomass consist of cellulose, lignin, carbohydrate which have hydroxyl group in their structure and could be good adsorbent for contamination. Metal uptake is believed to occur through sorption process involving carboxylic and phenolic functional groups which result in formation of surface complexation mechanism between metal ions and lignocellulosic adsorbents.
V. Garg, Jyoti, Rohit dutt; IJGHC, March 2018 – May 2018; Sec. A; Vol.7, No.2, 313-326.; DOI: 10.24214/IJGHC/GC/7/2/31326.
The family Plumbaginaceae consists of 10 genera and 280 species. The genus Plumbago includes 55 plants. Some plants are common like Plumbago aphylla Bojer Ex Bioss, P. auriculata Lam (P.capensis), P. caerulea Kunth, P. wissii Friedrich, P. europaea L, P. indica L (P. rosea), P. pulchella Bioss, P. zeylanica L. Out of these eight species of Plumbago, P. zeylanica, P. indica and P. auriculata are very common. P. zeylanica is broadly used for commercial preparation of medicines due to its biological activities. Literature review on Genus Plumbago has been compiled using references from major databases such as Chemical Abstracts, Medicinal and Aromatic Plants Abstracts, Pub-Med, Science direct, Scifinder, Springer, Phyto-chemical and Ethano-botany database. The available information on Plumbago has been divided into six sections, that is, distribution, morphology, macroscopy, microscopy, phyto-constituents, ethno-pharmacology, pharmacological studies, covering prominent species i.e. P. zeylanica, P. indica, P. auriculata.
C. J. Patil, Manisha C. Patil, Ankur S. Patil, Dhiraj Kolhe, Sonali P. Rane and Mrunmayee C. Patil; IJGHC, March 2018 – May 2018; Sec. A; Vol.7, No.2, 300-312.; DOI: 10.24214/IJGHC/GC/7/2/30012.
We have reviewed various papers from the literature A conventional condensation reaction of an aromatic ketone, Benzophenone with six different aromatic amines viz. 2-Fluoro aniline, 3-Nitro aniline, 4-Nitro aniline, Aniline, 2-Chloro aniline and 4-Chloro aniline to react efficiently to synthesize a series of Ketimines, BZ-1 to BZ-6, in moderate to high yield and high purity. The reaction was monitored and the products were analyzed by employing the TLC technique. The products were purified by column chromatography. All the products obtained were characterized by their colour, physical constant, TLC, elemental analysis and spectral (UV-Vis and FTIR) method. The synthesized Ketimines were subjected to in-vitro biological activity in two different solvents viz. Ethanol and DMSO. Their results are compared and discussed.
A.S. Fouda, K. Shalabi, M. M. Bakr; IJGHC, March 2018 – May 2018; Sec. A; Vol.7, No.2, 280-299.; DOI: 10.24214/IJGHC/GC/7/2/28099.
The inhibitive behavior of some arylazo acetohydrazide (AAH) derivatives on aluminum in 1 M HCl solution was examined by different methods such as weight loss, potentiodynamic polarization (PP), electrochemical impedance spectroscopy (EIS), electrochemical frequency modulation (EFM) and scanning electron microscope (SEM). AAH compounds act as mixed type inhibitors according to Potentiodynamic polarization results. The results acquired from weight loss method show that the inhibiting behavior of AAH compounds increases with increasing in concentrations and decrease with increasing in temperature. The adsorption isotherm of AAH compounds was found to obey Temkin isotherm. Theoretical data and experimental results are in good correlation.
T. Mary Vergheese, S. Saral Sessal; IJGHC, March 2018 – May 2018; Sec. A; Vol.7, No.2, 265-279.; DOI: 10.24214/IJGHC/GC/7/2/26579.
Environmentally benign green synthesis of ZnO nanoparticle using leaf extract of Centella Asiatica towards photocatalytic degradation of Methylene blue for the sustainability of the environment is reported in the present work. Zinc oxide nanoparticles (ZnO NP) function as photo catalyst in the degradation process. The synthesized catalyst was characterized using UV- Visible spectrometery, XRD, FTIR, GC-MS, FE- SEM and SEM – EDX analytical techniques. The bio active components and functional groups present in the leaf extract of Centella Asiatica was analysed using GC-MS and FTIR techniques. SEM-EDX and FE- SEM response shows the surface morphology of ZnO NP which resemble flake structured Sea Urchin shaped ZnO NPs with nanometer dimension. The photocatalytic degradation property of ZnO NPs towards the degradation of Methylene Blue (MB) dye with the effect of pH was studied in presence of solar light using UV-Vis spectrophotometer. The results reveal that the biosynthesized zinc oxide nanoparticles are effective photocatalyst towards dye degradation in presence of solar light. Moreover from the kapp and degradation efficiency values it was found that the rate of photocatalyticdegradation was faster in acidic medium compared to the degradation rate in alkaline and neutral medium.