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By Lawrence K. Wang PhD, PE, DEE (auth.), Lawrence K. Wang PhD, PE, DEE, Norman C. Pereira PhD, Yung-Tse Hung PhD, PE, DEE (eds.)

The previous twenty-five years have witnessed a turning out to be around the globe force to revive the standard of the environment and to guard it from the degrading results of air, noise, strong waste, and water toxins. In complicated Air and Noise toxins regulate: guide of Environmental Engineering, quantity 2, best toxins keep an eye on educators and working towards pros describe how a number of combos of alternative state-of-the-art technique structures could be prepared to resolve air, noise, and thermal toxins difficulties. every one bankruptcy discusses intimately various approach combos, besides technical and financial reviews, and offers reasons of the rules in the back of the designs, in addition to various variation designs priceless to practising engineers. The emphasis all through is on constructing the required engineering suggestions from primary rules of chemistry, physics, and arithmetic. The authors additionally contain vast references, rate facts, layout tools, suggestions at the set up and operation of assorted pollution keep watch over technique gear and structures, and most sensible on hand applied sciences (BAT) for air, thermal, and noise pollutants keep watch over. A spouse quantity, pollution regulate Engineering: instruction manual of Environmental Engineering, quantity 1 significantly surveys the rules and practices excited about simple pollution keep an eye on methods.
state-of-the-art and hugely sensible, complex Air and Noise pollutants keep an eye on: instruction manual of Environmental Engineering, quantity 2 deals educators, scholars, and training engineers a powerful grounding within the ideas of this severe box, in addition to potent equipment for constructing optimum abatement applied sciences at bills which are absolutely justified by way of the measure of abatement achieved.

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40 Lawrence K. Wang et al. 800 Illinois Kentucky Martinka Westland Texas lignite 4. DESULFURIZATION THROUGH COAL CLEANING Coal contains pyritic and organic sulfur, as well as some sulfatic (sulfate) forms. Pyritic sulfur is a mineral form, whereas the organic sulfur is chemically bound in the structure of the coal. Most mineral sulfur can be removed by mechanical coal cleaning processes, but removing organic sulfur requires chemical processing (1–4,10,15–22). Illustrative values appear in Table 1 (23).

Effective Stack Height The effective stack height (HT) is the sum of two terms: (1) actual stack height (HS) and (2) the plume rise (HP) caused by the velocity of the stack gases and by the density difference between the stack gases and the atmosphere, as shown in Fig. 4 (25) 18 Lawrence K. Wang and Chein-Chi Chang Fig. 3. Effective stack height (HT), actual stack height (HS), and plume rise (HP). where D is the diameter of the stack (m) and VS is the vertical efflux velocity at release temperature (m/s).

1. Sulfur Oxides and Hydrogen Sulfide Emissions Sulfur oxides (SOx) and hydrogen sulfide are two major sulfur-containing air pollutants. Both cause great environmental concern. Hydrogen sulfide gases are released from sanitary landfill sites, sanitary sewer systems, wastewater-treatment plants, reverse-osmosis drinking water plants, septic tank systems, and hydrogeothermal plants (1–8). However, H2S releases are negligible in comparison with SOx releases. Accordingly, only the quantitative information of SOx emissions is presented in this section.

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