American Journal of Chemical Research

Study of Mechno- luminescence, thermoluminescence properties of solid state reaction derived Ce3+co-doped Ca2MgSi2O7:Eu2+ microphosphors and application for mechnoluminescent display device technology.

Review Article of American Journal of Chemical Research Study of Mechno- luminescence, thermoluminescence properties of solid state reaction derived Ce3+co-doped Ca2MgSi2O7:Eu2+ microphosphors and application for mechnoluminescent display device technology Dipti Shukla , Ambuj Pandey O.P Jindal University , Raigarh (C.G) In this paper, we discuss a series of ce3+ co doped di calcium magnesium di silicate phosphors were synthesized by high temperature solid state reaction method. Thermoluminescence properties of prepared sample also investigated. Their kinetic parameters [activation energy (E), frequency factor (s) and order of the kinetics (b)] of these phosphors were evaluated and compared using the peak shape method. FractoMechno- luminescence properties Ca2MgSi2O7:Eu2+ and Ca2MgSi2O7:Ce3+,Eu2+ phosphors. Their ML properties showed that when Ca2MgSi2O7:Eu2+ phosphor is co doped with Ce3+,  ML intensity was more (strongly) enhanced and their mechanoluminescence intensities of  Ca2MgSi2O7:Eu2+ and Ca2MgSi2O7:Eu2+,Ce3+ phosphors increased proportionally increased with the increase in impact velocity, which suggests that these phosphors can be used as mechnoluminescent display device such as fracture sensor, impact sensor, damage sensors, safety management monitoring system etc . Keywords: Thermoluminescence(TL) , Mechnoluminescence(ML) , Kinetic parameters ...

By using low-cost Adsorbents process elimination of heavy metals from wastewater

Review Article of American Journal of Chemical Research By using low-cost Adsorbents process elimination of heavy metals from wastewater 1Baby Abrarunnisa Begum. 2K.B. Shanthi Sudha 1Associate Professor, Chemistry Department, SWCET, Hyderabad, Telangana, India 2Associate Professor, Chemistry Department, Andhra mahila Sabha for women Osmania University (Campus) Hyderabad, Telangana, India The beginning of industrialization human being has observed a variety of environmental concerns on the earth. The industrialization has not simply carried growth and affluence but finally troubled the environment. One of the crashes is noticeable, in form of water pollution. Now the present study of heavy metal pollution of water body has been talk over. Effluents from an unlimited amount of industries viz., textile, tannery, dyes, pigment, paint, wood processing, electroplating, leather, petroleum refining etc., have a key amount of heavy metal in their wastewater. The conventional technique of treatment heavy metal contamination contains chemical precipitation, membrane separation, chemical oxidation, ion exchange, electro dialysis, reverse osmosis, etc. These procedures are costly, energy intensive and often linked with creation of toxic by-product. Hence, the adsorption has been experimental as a cost-efficient method for treatment of heavy metals removal from wastewater. In the existing study numerous inexpensive adsorbent has been an analysis as a reduction of heavy metal effluence from wastewater. These adsorbent include resources of natural origin similar to zeolites, peat moss, peat moss, chitin, clay are find to be a real agent for elimination of lethal heavy metal like Cu, Ni, Hg, Zn, Cr , Pb, Cd, etc. Distinctly from these, a range of farming wastes like waste tea, rice husk, black gram neem bark, walnut shell, etc. Also known to be an influential adsorbent for the eliminating heavy metal from wastewater. at the side of that inexpensive or low-cost manufacturing byproduct like lignin, fly ash, iron (III) red mud, hydroxide ...

A Study on Moisture Content of Bamboo Fiber Reinforced HDPE Composite at Different Temperature

Research Article of American Journal of Chemical Research A Study on Moisture Content of Bamboo Fiber Reinforced HDPE Composite at Different Temperature Md. Shaharul Islam1, 2 , Md. Hafizur Rahman1, G M Arifuzzaman Khan1, M Shamsul Alam1, Md. Helal Uddin1 1Department of Applied Chemistry & Chemical Engineering, Islamic University, Kushtia-7003, Bangladesh. 2Department of Chemistry, Bangladesh Army University of Engineering & Technology(BAUET), Qadirabad Cantonment, Natore-6431, Bangladesh. Natural fibers are becoming a competitive option as reinforcement of polymeric composite materials due to their bio-based character, good specific mechanical properties, low cost and inexhaustible supply. The aim of this study was to make the Bamboo fiber and high density polyethylene (HDPE) composite and to measure the wet loss of the composite due to removal of moisture content at 105 0C, 125 0C and 135 0C temperature. Bamboo fiber were extracted from bamboo culm and treated with 0.5 M NaOH. Bamboo fiber-reinforced HDPE composites were prepared employing melt blending technique followed by heat press molding with various weight fractions (5, 10, 30 and 40 wt. %) of the treated bamboo fiber with HDPE. A systematic investigation of the thermal behavior on the moisture content of the composites was carried out. It was observed that at 135 0C temperature more moisture removed from the composite compared to 105 0C and 125 0C temperature. It also revealed that the weight loss of the composite increased with the increase in the Bamboo fiber loading (5% to 40%). Keywords: Bamboo Fiber, HDPE, Composite, Reinforcement ...

Heavy Metals in Soil and Vegetables Irrigated with Ex- Tin Mining Ponds Water in Barkin – Ladi Local Government Area Plateau State, Nigeria

Research Article of American Journal of Chemical Research Heavy Metals in Soil and Vegetables Irrigated with Ex- Tin Mining Ponds Water in Barkin - Ladi Local Government Area Plateau State, Nigeria Mafuyai G. M,* Eneji I. S, Sha’Ato R and Nnamonu L. A Department of Chemistry Faculty of Natural Sciences, University of Jos, Plateau State Tin mining pond water irrigated fields can cause potential contamination with heavy metals to soil and vegetables, thus pose a threat to human beings. The current study was designed to investigate the contamination of the soil with toxic heavy metals and their accumulation in edible vegetable crops. The heavy metals Pb, Cu, Cd, Zn, Cr, Fe, Mn and As were analyzed for their bioaccumulation factors to provide baseline data regarding environmental safety and the suitability of tin mining pond water for irrigation in the future. The contamination factor (CF) of these metals in the soil were calculated and indicated levels of metal contamination in the order of Cd > Zn > Pb > Cr > Cu > As ˃ Fe ˃ Mn. The concentrations of Pb, Cd, Cr, As, and Mn in the edible vegetables were above the safe limit prescribe by FAO/WHO, 2007 and EU, 2002 in all studied vegetables. The results indicated a potential pathway of human exposure to slow poisoning by heavy metals due to the utilization of vegetables grown on heavy metal contaminated soil that was irrigated with tin mining pond water sources. Amongst the studied vegetables, cabbage was safe from other metal except for As and Cr that were observed to exceeds tolerable limit. The irrigation source was identified as the source of the soil pollution in this study. Thus, the consumption of these vegetables might poses substantial health risk to consumers for this reason we therefore, emphasizes the need ...

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American journal of chemical research