effluent concentration Articles
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Precipitation of heavy metals from coal ash leachate using biogenic hydrogen sulfide generated from FGD gypsum
Investigations were undertaken to utilize flue gas desulfurization (FGD) gypsum for the treatment of leachate from the coal ash (CA) dump sites. Bench-scale investigations consisted of three main steps namely hydrogen sulfide (H2S) production by sulfate reducing bacteria (SRB) using sulfate from solubilized FGD gypsum as the electron acceptor, followed by leaching of heavy metals (HMs) from ...
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Pollution retention capabilities of roadside soils
ABSTRACTRunoff from highways contains significant loads of heavy metals and hydrocarbons. According to German regulations, it should be infiltrated over embankments to support groundwater-recharge. To investigate the decontaminating effect of greened embankments, soil-monoliths from highways with high traffic densities were taken. Soils were analyzed to characterize the contamination in relation ...
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The chemical aspect of NOx scrubbing, pollution engineering
With the passage of the 1990 Clean Air Act Amendments, many chemical and metal industries and utility producers will now be required to further limit the amount of NOx (Nitrogen Oxides) produced. NOx is a precursor to ozone in the atmosphere, and is believed to be a major contributor to acidic deposition (acid rain). Formation of ozone: NOx is produced in a variety of different processes, ...
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Removal of nickel and cadmium heavy metals using nanofiber membranes functionalized with (3-mercaptopropyl)trimethoxysilane (TMPTMS)
Functionalized nanofibrous membranes have been produced via electrospinning with a polymer solution of 19% (w/w) of nylon 66 prepared in a formic acid/chloroform mixture (75:25 v/v). The optimum parameters of electrospinning, like voltage, flow rate, tip and collector distances, were achieved and produced nanofiber membranes with a thickness of 287 nm. Then the nanofiber membranes were ...
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Decoding Principles of Industrial Wastewater Treatment
Understanding Industrial Wastewater Treatment The world of industrial wastewater is vast and varied, encompassing a broad spectrum of waste liquids. These are typically generated during various industrial treatment processes such as manufacturing or production activities. A key player in this arena is production wastewater, which stems from the use of water in numerous processing operations. ...
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Case study: Printed Circuit Board Manufacturing
Aspocomp Ltd. is a Finnish leader in the manufacture of printed circuit boards (PCB), thick film hybrid circuits and mechanical assemblies for the electronics industry. Its main customers are European manufacturers of electronics equipment. Rather than producing and marketing its own products, Aspocomp relies on its customers who design the product and provide the specifications and drawings, ...
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Benefits & Disadvantages of the Advanced Oxidation Process
In many water and wastewater treatment applications, there are a number of pollutants that are difficult to reduce by physical, chemical, or biological means alone. In more recent years, there has been a growing concern regarding pharmaceutical drugs in drinking water and aquatic environments. Pesticides get caught in runoff from farms into freshwater supplies. Personal care products are ...
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Pros and Cons of the Advanced Oxidation Process
Benefits & Disadvantages of the Advanced Oxidation Process In many water and wastewater treatment applications, there are a number of pollutants that are difficult to reduce by physical, chemical, or biological means alone. In more recent years, there has been a growing concern regarding pharmaceutical drugs in drinking water and aquatic environments. Pesticides get caught in runoff from ...
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Base Metal and Iron Ore Mining Industry - Pollution Prevention Guidelines
Introduction Pollution Prevention Guidelines to provide technical advice and guidance to staff and consultants involved in pollution-related projects. The guidelines represent state-of-the-art thinking on how to reduce pollution missions from the production process. In many cases, the guidelines provide numerical targets for reducing pollution, as well as maximum emissions ...
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pH Adjustment - A Primer
A brief review of the definition of pH, the pH scale, and some of the chemistry involved in pH Adjustment systems is provided below. For some this may be trivial, yet for many others this may be useful. The information provided below is typical of the background information we provide in our training classes / seminars. By Definition pH is the measure of free hydrogen activity in water and can ...
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