Zinc oxide

It is always difficult to remove contaminations from soils because it contains many toxic chemicals such as (Pb, As, Cu, Cd, Cr, Ni, Hg and Zn). This chemicals mixed with the soil after burning of industrial waste, electronics waste or uses of agricultural technology. Then rain water makes it seep deep into the soil and cause soil pollution. This makes it so difficult and time consuming to remove, particularly when the affected area is on a large scale. Soil is made of by two components which are

redox reaction of Copper and Zinc. Copper and zinc are both components of a penny and the oxidation reaction utilizes nitric acid, a very strong oxidizing agent, in order to oxidize both copper and zinc. The reaction generates a highly toxic, brown gas which is nitrogen dioxide (NO2), but more importantly, it results in the complex ions of copper and zinc. The complex ion generated of copper is Cu(H2O)42+ and has a dark blue hue while the complex ion generated of zinc is Zn(H2O)42+ and does not have

Several metals have been tested for their role in fly ash toxicity. Although universally high toxicity has been attributed to vanadium [Bhatnagar, 2004 and Liu et al., 2005], nickel is generally not far behind [Salnikow et al., 2004 and Kurowska & Bal, 2010]. Nickel is a primary contributor to the inhalation cancer risk because of its relative high concentration in fly ash and the known carcinogenic potency of its sub-sulfide forms (Ni3S2) [Dreher et al., 1997]. Huang et al. (2015) suggest

observed in absorption spectra after the addition of 1 equivalent various metal ions such as Ag(I), K(I), Li(I) Na(I), Co(II), Cu(II), Cd(II), Pb(II), Mg(II), Hg(II), Mn(II), Al(III), Cr(III), Gd(III) and Nd(III) ions. Interestingly upon the addition of zinc and nickel ions to the probe L1 absorbance peak shifted to higher wavelength (red shift) from 347 nm to 413 nm and 410 nm, respectively. Thus, L1-Zn(II) and L1+Ni(II) complexes exhibited color change from colorless to intense yellow color. Similarly

Zinc is known to prevent and treat the intoxication of lead which often proves more effective along with the combination of methionine or thiamine (Flora et al., 1989; 1991). Supplementation of zinc simultaneously with methionine or thiamine helps effectively reduce urinary excretion of ALA and the lead induced ALAD activity in the blood. This suggests that the combination therapy including the essential nutrient elements and vitamins concurrently with exposure to lead could be more effective than

Steel production(p7) Steel manufacturing has many different processes and can be a very complex to manufacture. Firstly the iron ore needs to be mined out of the ground before steel production can begin.From this process of mining the steel can then start it production process and begin the vital three stages needed to produce steel. Firstly a very intensive heat source needs to be produced to melt the iron ore. After this stage the intensive heat generated in the furnace is used to melt the iron

CHAPTER 1 INTRODUCTION 1.1 Aluminium: Aluminium is a chemical element in the boron group with symbol Al and atomic number 13. It is available in large quantity. It is combined with 270 different materials. Aluminium is good for corrosion resistance. Aluminium is soft, light weight and ductile material. It can be easily machined and extruded. 1.2 Alloy: An alloy is a material formed by two or more chemical elements that has metallic properties, in which at least one is a metal. Alloys are designed

According to the Merriam-Webster dictionary, the term of mining is the “process or business of digging in mines to obtain minerals, metals, jewels, etc.” Of course, that’s not just it, mining is a really complex business, it consists in a lot of things, for example; the application of metallurgical techniques. First off, What is metallurgy and what are some metallurgical techniques? Accoring to kids.britannica.com “Metallurgy is separating metals from their ores, purifying and working the metals

1.Introduction 1.1. Reasons for choosing Hoa Sen Group Hoa Sen Group is one of the largest companies that supply products of steel industry in Vietnam. Up to this day, Hoa Sen Group has built manufacturing plants with the largest closed scale in Southeast Asia, which apply modern technologies in the industry and promote programs to affirm one of the leading brands of steel industry. Hoa Sen Group is not only a leading in industrial products of steel sheet but also a leading company in the implementation

CHAPTER 1 INTRODUCTION 1.1 Background and Problem Statement 1.1.1 Schiff Base The condensation product of primary amines with active carbonyl compounds have resulted in the formation of Schiff base compound. This has been reported by Hugo Schiff in 1864. Schiff base compound contain azomethine -C≡N with a general formula RHC=N-R’ where R and R’ are alkyl, aryl, cyclo alkyl or heterocyclic groups which may be variously substituted. These compounds are also known as anils, imines or azomethines