Management of toxic substances and hazardous wastes

1984 ◽  
Vol 62 (8) ◽  
pp. 968-970 ◽  
Author(s):  
V. E. Niemela
Keyword(s):  
North America ◽  
Polychlorinated Biphenyls ◽  
Emerging Technologies ◽  
Hazardous Wastes ◽  
Toxic Substances ◽  
Toxic Chemical ◽  
Chemical Waste ◽  
Physical Chemical ◽  
Land Disposal ◽  
Treatment And Disposal

This paper describes the extent of the hazardous and toxic chemical waste problems in Canada and discusses the management, treatment, and disposal methods commonly used in North America and Europe. The treatment and disposal techniques covered are biological, physical–chemical, incineration technologies, and secure land disposal. Some of the available and emerging technologies for destruction of polychlorinated biphenyls are also described.

Advances in Residuals Processing, Treatment and Disposal for Chemical and Petrochemical Industries – A Brazilian Case Study

1992 ◽  
Vol 25 (3) ◽  
pp. 173-181 ◽  
Author(s):  
F. Fontes Lima ◽  
F. Alves Pereira
Keyword(s):  
Hazardous Wastes ◽  
Petrochemical Complex ◽  
Processing Treatment ◽  
Technological Developments ◽  
Treatment And Disposal ◽  
Public Concerns ◽  
Petrochemical Industries ◽  
Brazilian Case

Technological developments and their application must follow a course that is parallel with legislation and public concerns about hazardous wastes management. This paper describes and comments the practices that have been conducted at a Brazilian Petrochemical Complex for 10 years.

scholarly journals Human Health Risk Assessment of The Levels of Dioxin-Like Polychlorinated Biphenyls (PCBs) in Soils From Mechanic Workshops Within Nekede Mechanic Village, Imo State, Nigeria

2021 ◽  
Author(s):  
Victor Chukwuemeka Eze ◽  
Azuka Nwabudike ◽  
Chidi Duru ◽  
Beniah Isiuku ◽  
Francis Ibe ◽  
...  
Keyword(s):  
Health Risk ◽  
Polychlorinated Biphenyls ◽  
Human Health ◽  
Organic Pollutant ◽  
Human Health Risk ◽  
Control Sample ◽  
Sampling Point ◽  
Toxic Substances ◽  
Imo State ◽  
Pet Bottles

Abstract Dioxin-like polychlorinated biphenyls (DL-PCBs) are a class of persistent toxic substances with a high potential to accumulate in the soil as an organic pollutant and bioaccumulate in humans. The study determined the level and human health risk of twelve (12) DL-PCBs in soils from mechanic workshops within Nekede mechanic village (NMV), Imo State. In this study, soil samples (0–15 cm depth) were collected at four different sampling points within Nekede mechanic village. At each sampling point, composite samples consisting of 10 sub-samples were collected with pre-cleaned pet bottles using soil auger and were labeled SA, SB, SC, SD. Control sample was taken 500 metres away from the mechanic village where there was no form of auto-mechanic activities. Sample analysis was conducted using Agilent GC 6890N coupled with Agilent MS 5970B to determine the levels of DL-PCBs. The data were analyzed using SPSS version 23. The results revealed that the mean concentration of 12 DL-PCB congeners (Σ12PCBs) in soil ranged from 0.31–16.31 µg kg− 1, which was much higher than that in the control sample (0.006–0.087 µg kg− 1). PCB-126 was the major contributor (58.99%) while the least contributor was PCB-157 (0.0040%) of the Σ12 DL-PCBs TEQ. The estimated LCR (adults 1.29×101, children 4.42×101) and HQs (adults 6.68×102, children 2.29×103) were above the acceptable risk limit (LCR = 10− 4, HQ = 1); indicating a very high adverse effect of DL-PCBs on humans especially children.

PHYSICAL–CHEMICAL WASTE-WATER TREATMENT UNDER DIGITAL COMPUTER CONTROL

1974 ◽  
pp. 533-544
Author(s):  
DOLLOFF F. BISHOP ◽  
WALTER W. SCHUK ◽  
ROBERT YARRINGTON ◽  
JAMES E. BOWERS ◽  
ELLIOTT D. FEIN ◽  
...  
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Digital Computer ◽  
Computer Control ◽  
Waste Water Treatment ◽  
Chemical Waste ◽  
Physical Chemical

scholarly journals Multi-Period Network Design Problem in Regional Hazardous Waste Management Systems

2019 ◽  
Vol 16 (11) ◽  
pp. 2042 ◽  
Author(s):  
Jun Zhao ◽  
Lixiang Huang
Keyword(s):  
Network Design ◽  
Design Problem ◽  
Programming Model ◽  
Planning Horizon ◽  
Network Design Problem ◽  
Mixed Integer ◽  
Hazardous Wastes ◽  
Total Risk ◽  
Total Cost ◽  
Treatment And Disposal

The management of hazardous wastes in regions is required to design a multi-echelon network with multiple facilities including recycling, treatment and disposal centers servicing the transportation, recycling, treatment and disposal procedures of hazardous wastes and waste residues. The multi-period network design problem within is to determine the location of waste facilities and allocation/transportation of wastes/residues in each period during the planning horizon, such that the total cost and total risk in the location and transportation procedures are minimized. With consideration of the life cycle capacity of disposal centers, we formulate the problem as a bi-objective mixed integer linear programming model in which a unified modeling strategy is designed to describe the closing of existing waste facilities and the opening of new waste facilities. By exploiting the characteristics of the proposed model, an augmented ε -constraint algorithm is developed to solve the model and find highly qualified representative non-dominated solutions. Finally, computational results of a realistic case demonstrate that our algorithm can identify obviously distinct and uniformly distributed representative non-dominated solutions within reasonable time, revealing the trade-off between the total cost and total risk objectives efficiently. Meanwhile, the multi-period network design optimization is superior to the single-period optimization in terms of the objective quality.

Establishing Project Feasibility for Emerging Technology Projects: An Independent Engineer’s Perspective

2011 ◽  
Author(s):  
David C. Demme
Keyword(s):  
North America ◽  
Development Process ◽  
Emerging Technologies ◽  
Emerging Technology ◽  
Assessment Process ◽  
New Approaches ◽  
The Status ◽  
Alternate Fuels ◽  
Specific Project

Technology suppliers, waste system managers and project developers across North America are endeavoring to find and implement new approaches to converting the energy in waste to electricity or alternate fuels. These entities, as well as potential financiers and communities that might benefit from these emerging technologies, often retain an independent engineer to assist in establishing the status and risks of the technology itself or the feasibility a specific project that has been proposed. Although independent engineering assessments are a well-established element of the non-recourse finance process, individuals and organizations new to the development process are often unfamiliar with the usefulness and content of these assessments. In the context of emerging technology-based projects, this paper will provide an overview of the role of an independent engineer in the development process, explain the typical assessment process, and discuss the content of a typical independent engineering report (“IE Report”).

Sign in / Sign up

Export Citation Format

Share Document