Chromium Contamination (Health and Safety) Articles

What is Hexavalent Chromium?

The dangerous compound made famous by the movie Erin Brockovich can occur naturally or through industrial pollution Hexavalent chromium, a toxic compound sometimes found in water, is a carcinogenic form of the metal chromium in an oxidation state. It’s also known as chromium-6 or Cr (VI). It’s both odorless and tasteless, and it can be found naturally in rocks, soil, and plants. It ...

Jul. 29, 2020

By Fluence Corporation

DNAPL stabilization using Organoclay at superfund site in Virigina - Case Study

The Atlantic Wood Industries (AWI) site is approximately 48 acres of land on the industrialized waterfront of Portsmouth, Virginia, along the Southern Branch of the Elizabeth River. From 1926 to 1992, a woodtreating facility operated at the site using both creosote and pentachlorophenol (PCP). Project Details Atlantic Woods Industries CQA Engineer: EA Engineering, Science and Technology ...

Sep. 13, 2019

By CETCO

Evaluation of Ceraflow-50 as a Filtration Media for Hexavalent Chromium Treatment - Case Study

Project Description Pilot testing was conducted to evaluate the relative performance of 4 filter media, including Ceraflow-50, as part of a reduction coagulation filtration (RCF) treatment process for the removal of hexavalent chromium (Cr(VI)) from groundwater. This evaluation was conducted at multiple well sites for a water utility in California. The RCF process achieves Cr(VI) removal by ...

Jul. 12, 2019

By Wateropolis Corp.

In-Situ Remediation of Heavy Metals Using Sulfur-Based Treatment Technologies

THE METALS PROBLEM: Highly toxic and highly soluble metals are contained in numerous waste streams including those from power, chemical, electronics facilities, general manufacturing plants, and mining facilities. Lead, chromium, arsenic, zinc, cadmium, copper, and mercury are the most common metal contaminants found on remediation project sites (US EPA, October, 2000). Cyanide is a common ...

Feb. 15, 2019

By Graus Chemicals, LLC

Usak Karma OSB - Case Study

Project name Usak Mixed Organized Industrial Zone Wastewater Treatment Plant Employer Usak Mixed Organized Industrial Zone Head of Entrepreneur Association Contractor Enta Muhendislik Antma Taah. San. Ve Tic. Ltd. Sti. Location of the plant Usak/TURKEY Scope of work Industrial and Domestic Wastewater Treatment Plant Contract Date 2005 Completion Date 2006 Flowrate of the plant:24.000 mJ/ ...

Nov. 5, 2018

By ENTA Treatment Systems Engineering Contracting Corporation

Hexavalent chromium removal from municipal wastewater using ferrous salts

Hexavalent chromium is difficult to remove during conventional biological wastewater treatment. This is because the hexavalent form is dissolved and is only sparingly removed by adsorption onto biomass in conventional processes. Hexavalent chromium is of particular concern because of its aquatic toxicity, and an increasing number of wastewater works have effluent discharge limits to protect ...

Jan. 1, 2018

By IWA Publishing

Manufactures brake and suspension systems

The Customer is a premier chassis supplier, with branches in many different countries worldwide, that designs and manufactures brake and suspension systems for the global transportation market. The Customer needs to reduce the high costs related to: • the disposal of the highly polluting and corrosive waste water coming from hard chromium plating line; • the operation of the galvanic ...

Nov. 16, 2017

By EVALED-Evaporator

Removal of chromium(III) from aqueous waste solution by liquid–liquid extraction in a circular microchannel

A new circular microchannel device has been proposed for the removal of chromium(III) from aqueous waste solution by using kerosene as a diluent and (2-ethylhexyl) 2-ethylhexyl phosphonate as an extractant. The proposed device has several advantages such as a flexible and easily adaptable design, easy maintenance, and cheap setup without the requirement of microfabrication. To study the ...

Jun. 24, 2017

By IWA Publishing

Magnetic Schiff's base sorbent based on shrimp peels wastes for consummate sorption of chromate

Magnetic Schiff's base chitosan composite has been prepared starting from shrimp peels as a raw material. Chitosan extraction involved three main stages as preconditioning, demineralization deproteinization and deacetylation. Chitosan modification process took place through the reaction between chitosan and polymeric Schiff's base of thiourea/glutaraldehyde in the presence of magnetite. The ...

Mar. 27, 2017

By IWA Publishing

Researchers: Carcinogen Can Occur Naturally in Water

Representatives of the U.S. Fish & Wildlife Service and Duke Energy take samples on the Dan River, which was polluted by a coal ash spill. Scientists have found that hexavalent chromium in well water, long attributed to coal ash contamination, may occur naturally. Hexavalent chromium is a carcinogen found in drinking water supplies. Many have thought its presence is due to human activity, ...

Dec. 21, 2016

By Fluence Corporation

Electrochemical treatment of spent tan bath solution for reuse

A spent tanning bath contains high concentration of salts, chromium and protein. The treatment system for removal of chlorides or chromium from this effluent is expensive. In this context this waste has to be reused. Our study focuses on the application of advanced oxidation processes for protein removal present in a tanning bath. To improve the quality of the chromium tanning bath, two ...

Dec. 9, 2016

By IWA Publishing

The removal of Cr(VI) from aqueous solution by almond green hull waste material: kinetic and equilibrium studies

The discharge of industrial effluents containing hexavalent chromium into the environment can be very harmful to living things. Therefore, prior to effluent discharge into the environment, hexavalent chromium should be removed from contaminated water and especially from wastewaters. In the present work, almond green hull powder (AGHP) was investigated for the removal of hexavalent chromium ...

Oct. 4, 2016

By IWA Publishing

Hexavalent chromium removal by using synthesis of polyaniline and polyvinyl alcohol

Over the past few years, heavy metals have been proved to be one of the most important contaminants in industrial wastewater. Chromium is one of these heavy metals, which is being utilized in several industries such as textile, finishing and leather industries. Since hexavalent chromium is highly toxic to human health, removal of it from the wastewater is essential for human safety. One of ...

Sep. 1, 2016

By IWA Publishing

Role of low molecular weight organic acids on pyrite dissolution in aqueous systems: implications for catalytic chromium (VI) treatment

A systematic study combining batch experiments with spectroscopic analyses was carried out to better understand the effects of various organic acids on pyrite dissolution and subsequent Cr(VI) removal in aqueous systems. Our results suggest that organic acids had no effect on total Fe dissolution from pyrite relative to systems containing no acid. However, while nearly 100% of total Fe ...

Apr. 15, 2016

By IWA Publishing

These companies are figuring out how to take the toxics out of electronics

As global consumption of cellphones and other devices soars, industry searches for ways to decrease the threat of chemical components to people and the environment. On a Wednesday in late February 2010, Hewlett-Packard hosted an unusual training session at its offices in Fort Collins, Colorado. The technology company had decided to eliminate polyvinyl chloride, or PVC — a type of plastic ...

Jan. 11, 2016

By Ensia

Electrochemical decomposition of fluorinated wetting agents in plating industry waste water

Electrochemical decomposition of fluorinated surfactants (PFAS, perfluorinated alkyl substances) used in the plating industry was analyzed and the decomposition process parameters optimized at the laboratory scale and production scale of a 500-liter reactor using lead electrodes. The method and system was successfully demonstrated under production conditions to treat PFAS) with up to 99% ...

Dec. 28, 2015

By IWA Publishing

Research on the process-based risk evaluation method of groundwater pollution for contaminated site

A universal method to evaluate groundwater pollution risk with the site scale has not been established. The groundwater pollution risk is commonly evaluated by overlaying the results of groundwater vulnerability and pollution sources, but this method is inapplicable for contaminated sites. Considering the current supervision demands of groundwater pollution in China, this paper suggests a ...

Aug. 13, 2015

By IWA Publishing

Surface Decontamination of Chromium Compounds (Potassium Chromate (K2CrO4) by DeconGel 1101

ABSTRACT Surface decontamination efficacy determination of DeconGelTM 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with Potassium Chromate (K2CrO4) was performed with ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) according to Environmental Protection Agency (EPA) SW-846 Methods: 3005A (sampling) and 6010C (analysis). HAZARDOUS MATERIALS RELEVANCE ...

Jun. 29, 2015

By Industrial Chem Solutions, Inc. is a subsidiary of Worldwide Specialty Chemicals, Inc.

Chrome plating process achieves cost reduction through zero liquid discharge - Case Study

A global manufacturer of automotive components was faced with rising costs related to waste disposal from a Chrome plating process used in a plant in Poland. The plant manufactures shock absorbers for passenger vehicles. The plating of the shocks adds corrosion resistance, increased surface hardness, and improves cleaning ability and overall appearance. Project Goals: Reduce waste disposal ...

Apr. 23, 2015

By PRAB, Inc

Development of a groundwater fungal strain as a tool for toxicity assessment

Despite the significant ecological role in groundwater the value of fungi as indicators of groundwater pollution is not known, as fungi are notoriously challenging to assess for toxicity because of their varied morphological components, in particular their filamentous structures. Hence they remain rarely used in environmental risk assessments and monitoring programs for aquatic systems. We ...

Sep. 15, 2014

By John Wiley & Sons, Ltd.

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