Remediation of Manufactured Gas Plant Soils Contaminated with Free and Complex Cyanide

Remediation of Manufactured Gas Plant Soils Contaminated with Free and Complex Cyanide

Author:

Publisher:

Published: 1992

Total Pages: 26

ISBN-13:

DOWNLOAD EBOOK

Cyanide is one of the main contaminants present in soil from manufactured gas plants (MGP) . Several treatment methods including thermal treatment, chemical treatment, ultraviolet irradiation, and biological treatment were evaluated for their ability to degrade the cyanide present in these soils. In the thermal treatment, raising the temperature of the purified waste to 2000--3000C resulted in complete removal of complex cyanide from the soil; however, the cyanide emitted was in a the toxic gaseous HCN form. Chemical treatment, using the oxidant Fenton's reagent in a 10% soil slurry, resulted in the destruction of 80% of the free cyanide but little, if any, complex cyanide. Ultraviolet irradiation of the basic leachate from MGP wastes in the presence of the chelating agent EDTA yielded 90% degradation of the complex cyanide. For biological treatment, using an aerobic mixed culture, almost 60% of the free cyanide disappeared from the system with minimal degradation of the complex cyanide. Each treatment has its limitations. Thus, a combined physical-chemical-biological treatment in which the complex cyanide is degraded to free cyanide by photodegradation under alkaline conditions, the free cyanide then chemically (by Fenton's reagent) or biologically converted to NH3 and CO2, is proposed for the removal of cyanide from MGP sites.


Remediation of Former Manufactured Gas Plants and Other Coal-Tar Sites

Remediation of Former Manufactured Gas Plants and Other Coal-Tar Sites

Author: Allen W. Hatheway

Publisher: CRC Press

Published: 2011-07-27

Total Pages: 1400

ISBN-13: 0824791061

DOWNLOAD EBOOK

Winner of the 2013 Claire P. Holdredge Awardee for Remediation of Former Manufactured Gas Plants and Other Coal-Tar Sites. This award, first established in 1962 by the Association of Environmental and Engineering Geologists, is named in honor of Claire P. Holdredge, a founding member and the first President of the Association. The award is presented for a publication by an AEG Member(s) within the 5 previous years that is adjudged to be an outstanding contribution to the Engineering Geology profession. Remediation of Former Manufactured Gas Plants and Other Coal-Tar Sites is geared toward environmental professionals who want to design and implement gasworks remediation strategies that offer the greatest chance to successfully protect the public. Exploring the bases for selecting remedial alternatives to adequately address today’s environmental wounds, this compendium of essential knowledge combines historic and modern scientific data and technology with common sense and empirical lore passed down from past generations of gas professionals, a group that is now all but extinct. Most of the general population does not have a sufficient understanding of remediation needs. Unfortunately, there seems to be a similar lack of knowledge among some environmental professionals whose job it is to protect the public from the health threats associated with coal tar. Pitfalls in remediation are common and represent a significant risk to the public, especially when processes are based on inaccurate assumptions. This book sifts through the existing scholarship from around the developed world to present the necessary evaluation factors used in effective remediation. Almost encyclopedic in scope, it offers 265 separate tables with checklists, hard data facts, and associations to help readers define site-specific gas plant conditions. It also includes a plethora of photographs and historic drawings, as well as an extensive glossary that is indispensible for understanding potential and actual gas plant contamination. Useful for engineers, scientists, regulators, public officials, historians, and journalists among others, this book is intended for those who conduct remediation, as well as those involved in review and oversight. Its goal is to bring users closer to safely reclaiming land and reviving old coal gasworks sites in ways that ultimately will be sustainable for the public interest.


Cyanide in Water and Soil

Cyanide in Water and Soil

Author: David A. Dzombak

Publisher: CRC Press

Published: 2005-12-09

Total Pages: 616

ISBN-13: 1420032070

DOWNLOAD EBOOK

The presence of cyanide is a significant issue in industrial and municipal wastewater treatment and management, in remediation of former manufactured gas plant sites and aluminum production waste disposal sites, in treatment and management of residuals from hydrometallurgical gold mining, and in other industrial operations in which cyanide-bearing


In Situ Treatment of Manufactured Gas Plant Contaminated Soils Demonstration Program

In Situ Treatment of Manufactured Gas Plant Contaminated Soils Demonstration Program

Author:

Publisher:

Published: 1997

Total Pages: 20

ISBN-13:

DOWNLOAD EBOOK

The work performed in this study is Task 015, 'In Situ Treatment of Manufactured Gas Plant Contaminated Soils Demonstration Program' of U.S. Department of Energy cooperative agreement DE-FC21-93MC30127. The contained recovery of oily waste (CROW(TM)) process removes organic contaminants from the subsurface by adaptation of secondary and heavy oil recovery technology. The technology was successfully tested in the laboratory as part of a project for the U.S. Environmental Protection Agency (EPA) SITE Program's Emerging Technology Program. The EPA advanced the CROW process to the SITE Demonstration Program based on the laboratory performance. Additional development of the process has included a pilot test at an active wood treatment facility. The purpose of this project is to demonstrate and evaluate the effectiveness of the CROW process for remediation of a site contaminated primarily with a dense organic fluid. The site selected for this demonstration project was a former manufactured gas plant (MGP) site located in Stroudsburg, Pennsylvania.


Manufactured Gas Plant Remediation

Manufactured Gas Plant Remediation

Author: Allen W. Hatheway

Publisher: CRC Press

Published: 2017-12-14

Total Pages: 1104

ISBN-13: 1351652303

DOWNLOAD EBOOK

The assessment, remediation, and redevelopment of manufactured gas plant (MGP) sites pose a significant technical and financial challenge to successor property owners, including municipalities and other public entities undertaking brownfields revitalization, and to their consulting environmental engineers. Due to the toxicity of many coal tar constituents, sites contaminated as a result of gasworks operations pose a significant threat to public health. This book will discuss the history of the manufactured gas industry in Massachusetts (the largest in the US), as well as the toxicity of gasworks waste products, technical challenges in the cleanup process, and the process for site cleanups.


IN SITU TREATMENT OF SOILS CONTAMINATED WITH MANUFACTURED GAS PLANT WASTES, DEMONSTRATION PROGRAM.

IN SITU TREATMENT OF SOILS CONTAMINATED WITH MANUFACTURED GAS PLANT WASTES, DEMONSTRATION PROGRAM.

Author:

Publisher:

Published: 1997

Total Pages: 24

ISBN-13:

DOWNLOAD EBOOK

The contained recovery of oily waste (CROW{trademark}) process developed by Western Research Institute (WRI) removes organic contaminants from the subsurface by means of adaptation of technology used for secondary and heavy oil recovery. The CROW technology was successfully tested in the laboratory as part of a project for the US Environmental Protection Agency (EPA) SITE Program's Emerging Technology Program (Johnson and Guffey 1990). The experimental program consisted of several one- and three-dimensional hot-water flushing tests to simulate the process. The tests were conducted with organically saturated, sand packed tubes and blocks. These experiments showed that hot-water flushing could reduce the organic contaminant content by approximately 60%. Further testing with totally biodegradable chemicals showed that the removal rate could be increased to approximately 90%. Additional testing showed that the CROW process did not hinder but helped in the biodegradation of the residual organics (Johnson and Leuschner 1992). Based on the laboratory performance of the process, the EPA advanced the process to the SITE Demonstration Program. Further development of the process has included the completion of a pilot test at an active wood treatment facility. The pilot test provided additional information for the design of a field-scale remediation effort in addition to verifying several of the prepilot design specifications and predictions. Verified by the pilot test were the abilities to: (1) establish and maintain desired injection and extraction rates, (2) heat the test area to the desired temperature, (3) achieve non-aqueous phase liquid (NAPL) removal rates equivalent to laboratory rates, and (4) show that the produced fluid can be treated for reinfection or disposal (Fahy et al. 1992).