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Environmental Compromise Policy

Our Quest “Reduce our and your Environmental Impact”

We are committed to the protection of our environment and to ensure responsible environmental awareness by limiting the impact of the activities on our environment. We acknowledges the fact that through environmental conservation and protection practices we contribute to the well-being of our and the future generations. Environmental awareness is present in our activities and through our products will be present in yours. We are committed in minimizing the environmental impact and carbon footprint where we are direct or indirectly participating, by following this principles:
  • Minimize waste becoming operations as efficient as possible;
  • Actively promoting energy saving initiatives;
  • Actively promoting the procurement of environmentally friendly and recyclable products;
  • Minimize and treat any spillage or waste in line with best practices;
  • Minimize toxic emissions stabilizing the waste contaminants (as lead-based coating), supplying special abrasives additives;
  • Meet or exceed all the environmental legislation relates to our process.

 

NIOSH response and recommendations

Vincent Castranova

Health Effects Laboratory Division National Institute for Occupational Safety and Health
(304) 285-6032

RESEARCH SUMMARY: Silica and asbestos are known to cause lung damage and fibrosis. Therefore, there is a great deal of interest in limiting the use of silica as an abrasive material in sandblasting and to create fibers that would replace asbestos as a construction material. However, toxicological information on silica and asbestos substitutes is incomplete or absent, and data are lacking concerning the possible adverse effects of inhalation of abrasive substitutes for silica. Researchers on this project will develop a database on in vitro and in vivo pulmonary toxicity of several abrasive substitutes and characterize the role of physical and chemical properties of fibers in the development of lung disease.

  • The toxicity of silica substitutes will be evaluated using assays of lung cell function and viability after both in vitro and in vivo exposure to these materials. To date, the in vivo effects of silica and 10 abrasive substitutes (garnet, iron oxide, starolite, coal slag, treated sand, olivine, copper slag, nickel slag, crushed glass. and steel grit) have been investigated.
  • A dielectrophoresis apparatus has been developed that separates fibers according to length. Such a system allows the evaluation of the role of physical dimensions versus chemistry in the development of pulmonary disease and should assist in predicting the potential fibrogenicity of created asbestos substitutes. To date, a strong relationship between fiber length and in vitro toxicity has been shown with fiberglass. Additional experiments evaluated the role of fiber length on the production of inflammatory and fibrogenic cytokines and on transcription events.
  • Mechanistic studies (oxidant generation, activation of transcription factors, induction of mRNA for cytokine production) will be used to explain the initiation and progression of pulmonary inflammation, damage, and fibrosis. Such information could be used to evaluate the potential occupational health hazard posed by substitute materials and result in the development of early
    diagnostic tests for pulmonary disease.

 

Assessment of the use of spent copper slag for land reclamation

Teik-Thye Lim

Division of Environmental and Water Resources Engineering, Nanyang Technological University, Singapore, cttlim@ntu.edu.sg

J. Chu

Division of Geo-technics and Transportation Engineering, Nanyang Technological University, Singapore

The shortage of waste landfill space for waste disposal and the high demand for fill materials for land reclamation projects in Singapore have prompted a study on the feasibility of using spent copper slag as fill material in land reclamation. The physical and geo-technical properties of the spent copper slag were first assessed by laboratory tests, including hydraulic conductivity and shear strength tests. The physical and geo-technical properties were compared with those of conventional fill materials such as sands. The potential environmental impacts associated with the use of the spent copper slag for land reclamation were also evaluated by conducting laboratory tests including pH and Eh measurements, batch-leaching tests, acid neutralization capacity determination, and monitoring of long-term dissolution of the material. The spent copper slag was slightly alkaline, with pH 8.4 at a solid: water ratio of 1: 1. The batch-leaching test results show that the concentrations of the regulated heavy metals leached from the material at pH 5.0 were significantly lower than the maximum concentrations for their toxicity limits referred by US EPA’s Toxicity Characteristic Leaching Procedure (TCLP). It was also found that the material is unlikely to cause significant change in the redox condition of the subsurface environment over a long-term period. In terms of physical and geo-technical properties, the spent copper slag is a good fill material. In general, the spent copper slag is suitable to be used as a fill material for land reclamation.

 

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