water pollution Articles
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Biosorption of inorganic mercury onto marine alga Sargassum tenerrimum: batch and column studies
The potential of Sargassum tenerrimmum algal biomass to remove Hg (II) from aqueous solution is investigated through batch experiments with regard to the influence of solution pH, adsorbent dosage and agitation rate. The algal biomass showed increased sorption capacity with increase in solution pH in the range of 4-7 with the maximum uptake of 3 mmolg−1 at pH 7. For maximum uptake, the optimal ...
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A real-time control strategy for separation of highly polluted storm water based on UV–Vis online measurements – from theory to operation
‘Classical’ real-time control (RTC) strategies in sewer systems are based on water level and flow measurements with the goal of activation of retention volume. The control system rule of ‘clean (storm water) runoff into the receiving water – polluted runoff into the treatment plant’ has been thwarted by rough operating conditions and lack of measurements. Due to the specific boundary conditions ...
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Micro level groundwater flow and transport model to predict future spread of pollution for Ambur sub–basin, Tamil Nadu, India
Realistic groundwater flow and transport models have greater use in understanding, predicting and managing groundwater systems in water–scarce and polluted areas. In this study, micro–level flow and transport models were developed, using the Visual MODFLOW software, for the highly polluted Ambur sub–basin, Tamil Nadu for the purpose of predicting pollution migration in the next 50 years and ...
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Seasonal water quality vs. flow relationships in a small regulated stream
The relationship of a water quality constituent with respect to flow measured at a stream monitoring station can give valuable information about the watershed and in-stream processes about the constituent in question. Seasonal dependency patterns often reveal relationships which would be unnoticed if all data are treated together. The aim of this study is to examine water quality constituent ...
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Development of an integrated knowledge-based system on flow and water quality in Hong Kong coastal waters
This paper presents the coupling of the recent advancements in artificial intelligence (AI) technology with existing numerical models to constitute an integrated knowledge-based system (KBS) on flow and water quality. A hybrid application of the latest AI technologies, namely, KBS, artificial neural network and fuzzy inference system, in this specific problem domain is adopted here. This ...
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The development of a coupled model (PCPF-SWMS) to simulate water flow and pollutant transport in Japanese paddy fields
A new coupled model (PCPF–SWMS) was developed for simulating fate and behavior of pollutant in paddy water and paddy soil. The model coupled the PCPF- 1, a lumped model simulating pesticide concentrations in paddy water and 1 cm-surface sediment compartment, and the SWMS-2D, a finite element numerical model solving Richard’s and advection-dispersion equations for solute transport in soil ...
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Prj 9712 - Underground water decontamination at a Copper Mine Site - Case Study
Starting May 1997, on authorization from BHP Copper (Tucson, Arizona) a BIOREM lab test was performed on underground water from BHP Miami-Globe mining operation (Arizona). Samples consisted of contaminated underground water and some alluvial soil taken in the vicinity of the well. The soil made possible the set-up of two columns as in figure. From water and soil there were selected the ...
By Biomedy AG
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This polluted lake shows why we are all stakeholders when it comes to clean water
When environmental protection gets short shrift, the price we pay can be staggering. When I visited Onondaga Lake in 1999 as part of research I did as a student at Cornell, there was no evidence the lake was once home to vibrant waterfront resorts. Yet, in the late 1800s and early 1900s, Onondaga was considered “the Coney Island of Central New York,” with bustling amusement parks, ...
By Ensia
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Fleet Auto Detailing Become Easy with Mobile Car Wash Equipment
When it comes to professional auto detailing, handling vehicles one at a time can be challenging enough. Whether it’s cleaning RVs, family cars, or heavy vehicles, each one has its own unique cleaning needs and challenges. Fleet maintenance and cleaning is something that can be extremely challenging as well. When dealing with a fleet of vehicles, it’s important the job be completed ...
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Car Washing Equipment for Removing Dirt from Windows
Dirt collects fast on windshields and windows, which is the reason why these car parts should be cleaned on a regular basis. The old mop-and-soap method is no longer effective. If you want to achieve sparkling clean windows, use commercial car wash machines to remove dust, pollution, water stains, bugs, and other dirt. Car windows are cleaned with two types of car wash machines. A steam vapor ...
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Case study N°AA7 – Ambiant air monitoring – VOC Purge & trap
Context & Challenges Volatile organic compounds (VOC) can be dissolved in water. Sometimes water is polluted and to study contamination of VOC in finished drinking water, VOC must be measured. Chromatotec Solutions Chromatotec has developed a specific system for the measurement of VOC in water: a Purge & Trap system, the airmoPURGE. The analyzer is coupled with a degasing system ...
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Mass Spectrometers for Dissolved Species Analysis Applications
Flow-Through Dissolved Species Probe – The Flow-Through Probe is directly mounted on the MS with two ports to allow flow from an external reservoir. It is used for a wide range of dynamic applications. Denitrification Probe – Flow-through probe with a low flow design for denitrification studies. Micro-flow Inlet – Flexible capillary inlet for OEMS, on-line electrochemical MS, ...
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Needle Punched Geotextile Separator for Oxidation Pond Project in China - Case study
Geotextile separator is the placement of a flexible porous geotextile between soil and HDPE geomembrane liner to protect the anti seepage lining system from puncture. The short fiber needle punched geotextile is manufactured from polypropylene staple fibers and combines high water flow rate and durability while providing excellent soil retention, along with excellent physical and hydraulic ...
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Divers install eccentric plug valve in reservoir tunnel
A team of specialist divers – working in a cramped, water-filled tunnel 20 metres beneath the surface of a reservoir – has just completed installation of an eccentric plug valve to control water flow.The valve and associated equipment has been supplied to United Utilities by Viking Johnson (http://www.vikingjohnson.com), a world leader in the supply of pipe joints and repair and flow control ...
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