American Journal of Scientific Research and Essays


Adsorption Kinects and Isotherms for Removal of Rhodamine B

Research article of American Journal of Scientific Research and Essays Adsorption Kinects and Isotherms for Removal of Rhodamine B (dye) using Adsorbents prepared from drinking water treatment sludge  M.Nageeb Rashed*1, M.A.El-Daim El Taher1, S. M. M. Fadlalla2 1.Chemistry Department, Faculty of Science, Aswan University, Egypt 2. Aswan Company for Water and Wastewater, Aswan, Egypt The present work aims to investigate the removal of Rhodamine B dye (RB) from aqueous solution by using adsorbents prepared from alum sludge (AS) and Mud sludge (MS) of drinking water treatment plant. The effect of dye concentration, contact time, pH, temperature and adsorbent dose on the dye removal was studied. The equilibrium adsorption data of RB dye on the developed adsorbents were analyzed by the Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (D-R) Isotherms. The sorption data fitted well to Langmuir isotherm model. The maximum dye removal efficiency was observed at pH 7, contact time 90 min,and 0.1-0.25 gm dosage for both (AS) and (MS) adsorbents . Also, four kinetic models such as Pseudo-first order, Pseudo-second order, Intraparticle diffusion and Elovich models were tested to interpret the experimental data. The kinetic experimental data were fitted well to Pseudo-second order model.The thermodynamics parameters of adsorption system indicated spontaneous and endothermic process. Results indicate the effectiveness of the developed adsorbents for removing RB dye. Keywords:  sweage sludge, Rhodamine B, adsorption, pollution, wastewater ...

Conventional and Molecular Diagnostic Tools for Genital Tuberculosis

Research article of American Journal of Scientific Research and Essays Comparative Study on Conventional and Molecular Diagnostic Tools for Genital Tuberculosis Correlating with Infertility in Indian Women Gargi Kumari1,2, Amit Mani Tiwari1, Divya Goel2 and Sanjay Mishra1,* 1Department of Biotechnology, IFTM University, Lodhipur Rajput, Delhi Road (NH 24), Moradabad 244102, UP, India; 2 Department of Clinical Biochemistry & Pathology, Sri Sai Hospital, Delhi Road, Near Loco Shed Bridge, Moradabad 244 001, U.P., India Mycobacterium tuberculosis, the etiological agent for tuberculosis, has been comprehensively studied for over a century now. But the disease still remains a major public health concern today in the 21st century. The precised and authenticated diagnosis is mandatorily pre-requisite to proper medication and cure of tuberculosis that specifically interferes and thus complicating physiological and biochemical mechanism of setting pregnancy in Indian women ranging between the age of 18-40 years. Various combinations of conventional and modern diagnostic tools were considered and monitored for the best possible option. Data obtained from the present study provides new insights into PCR with modified and advanced protocol likely to be competent as a novel molecular diagnostic technique for rapid and précised diagnosis of genital tuberculosis causing infertility in developing countries. Keywords:  Amenorrhea, Endoscopy–laparoscopy, Genital tuberculosis, Hysteroscopy, Menorrhagia, Mycobacterium tuberculosis, Oligomenorrhea, PCR ...

Direct measurement of the absolute light refractive index of air

Research article of American Journal of Scientific Research and Essays Direct measurement of the absolute light refractive index of air with the made double Michelson interferometer Jozef Babiak The paper describes the direct measurement of the absolute index of refraction of air double-Michel son interferometer without knowing parameters of the air, namely, pressure, temperature and chemical composition of the air. The direct measurement and the calculation of absolute index of refraction of air double Michelson interferometer is used as the applicable laws of optics ...

Time Series Analysis: A Hydrological Prospective

Research article of American Journal of Scientific Research and Essays Time Series Analysis: A Hydrological Prospective Sirisha Adamala 1Applied Engineering Department, Vignan’s Foundation for Science, Technology and Research University (VFSTRU), Vadlamudi-522213, Guntur, Andhra Pradesh, India. The analysis of time series is based on the assumption that successive values in the data file represent consecutive measurements taken at equally spaced time intervals. There are two main goals of time series analysis: (a) identifying the nature of the phenomenon represented by the sequence of observations, and (b) forecasting or predicting future values of the time series variable. Both of these goals require that the pattern of observed time series data is identified and more or less formally described. Once the pattern is established, one can interpret and integrate it with other data (i.e., Use it in the theory of the investigated phenomenon, e.g., Seasonal commodity prices). Regardless of the depth of one’s understanding and the validity of our interpretation (theory) of the phenomenon, one can extrapolate the identified pattern to predict future events. This paper discusses about how to analyze time series data, what are its goals, types of time series data, and models available to analyze time series data. Keywords: Time series, ARIMA, Box-Jenkins, rainfall, climate, hydrology ...

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American Journal of Scientific Research and Essays1

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