Biosorption of Arsenic (III) by Using Lemon Peel Powder as Low Cost Effective Biosorbent

The use of lemon peel powder, a novel, low-cost, and sustainable biosorbent derived from food waste, to remove arsenic has largely gone unexplored. The feasibility and viability of the As (III) biosorption abilities of lemon peel powder are compared in this study. The parameters such as contact time, pH, the amount of lemon peels used, the initial arsenic concentration, and temperature all had an effect on the sorption process. Thermodynamic, kinetic, and equilibrium were all evaluated. The optimal pH was 6.0, and it lasted until pH 8 with 72.34% removal efficiency. Lemon peel (LP) has a pH PZC value of 7 and a surface pH of 7. The analysis of kinetics revealed that the biosorption was regulated by a second-order reaction, as well as the fact that the catalytic region of the biosorbent was heterogeneous; however, the biosorption process was better defined by the Freundlich and Temkin isotherms. Finally, it is possible to remove arsenic (III) using waste content. Thermodynamic and equilibrium analysis have shown that sorption is a natural process that is spontaneous, beneficial, and endothermic. In addition, Fourier Transfer Infrared Spectroscopy (FTIR) research shows that arsenic reacts with metal oxides and the -OH functional group in lemon peel. These findings indicate that this peel can be used to remove arsenic from a simulated aqueous solution as a valuable, low-cost sorbent. This research lays the groundwork for the potential production of an effective filtration device that uses citrus peel powder as a low-cost, innovative, and long-lasting biosorbent to treat water polluted with arsenic (III). Keywords: Arsenic, Equilibrium, FTIR, Isotherms, Kinetic, PZC, Thermodynami DOI: 10.7176/JNSR/12-14-01 Publication date:July 31st 202

Influence of yogic practices on selected physiological and psychological variables of adolescents boys

To achieve the purpose of the present study, thirty adolescent boys from Coimbatore were selected as subjects at random and their ages ranged from 12 to 16 years. The subjects (n=30) were randomly assigned to two equal groups as yogic practices (YP) and control group (CG) in an equivalent manner. The competitive sport anxiety inventory – 2 was used to measure cognitive anxiety, somatic anxiety and self confidence. A sphygmomanometer was used to measure the systolic blood pressure and diastolic blood pressure. A biomoniter was used to measure the heart rate. To find out the difference between the two groups analysis of covariance (ANCOVA) was used. The yogic practices group showed a decreased level of cognitive anxiety, somatic anxiety, heart rate and increased level of self confidence than the control group owing to the training effects of yogic practices. In case of diastolic blood pressure and systolic blood pressure there was no significant difference between yogic exercises and control group

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LabNet: An Image Repository for Virtual Science Laboratories

Part 1: Technology Adoption, Diffusion and Ubiquitous ComputingInternational audienceThere has been recent research on image and shape storage and retrieval. Several image/shape repositories and databases of large datasets have existed in literature. However, it can be said that these repositories have generic image data content as most of them are English based images of the general world. Since they do not focus on specific field of interest while populating them, there is a high probability that they may not have a sufficient coverage for images and shapes related to specific domains or fields such as high school science-oriented images and shapes. Hence, we develop ‘LabNet’; an image repository for high school science which contains images of high school science-related subjects and laboratory courses. We use Canny’s algorithm for edge detection of objects from crawled images; and then perform morphological operation algorithms for segmentation and extraction of object images. We state that our object image does not have any background and can be utilized for scene modelling and synthesis. LabNet can also be useful for high school science-based research as well as an educational tool for elementary science-based classes and laboratory exercises