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Hydrometallurgical Waste Production and Utilization
Published in Sehliselo Ndlovu, Geoffrey S. Simate, Elias Matinde, Waste Production and Utilization in the Metal Extraction Industry, 2017
Sehliselo Ndlovu, Geoffrey S. Simate, Elias Matinde
From the information presented in this section, the largest potential uses of red mud are seen in cement production, iron recovery, landfill restoration, road construction and building materials, most probably not as the major component but as a sizeable fraction to ensure that all fears regarding radioactivity are allayed. Although some of these applications have been commercialized, matching the annually rising tonnage with possible commercial applications continues to be a major challenge. Most of the applications are not capable of utilizing significant tonnages of bauxite residue. Other applications, such as REEs recovery might be economically very attractive, but have no impact on reducing the large volumes of bauxite residue created annually unless the recovery of iron, alumina and titanium is carried out as part of an integrated process. The ultimate goal should be to cleverly segregate the different materials within the red mud and utilize each component to its highest value, whether that is metal recovery, functional materials for higher-value applications, construction, chemicals industry and commodity usage. This approach on the use of red mud resources has a scope for creating new industrial synergies that can enhance the sustainability of the aluminium/alumina industries and many economies.
Fresh Kills landfill: the restoration of landfills and root penetration
Published in Niall Kirkwood, Manufactured Sites, 2003
This paper introduces the results of field testing of landscape site technologies in landfill restoration. In addition, several myths regarding the performance of tree roots on landfill caps are dispelled through on-site testing, literature research and the observation of precedents in the field. The implications of this research offer scientists, engineers and designers the potential for vigorous habitat creation and restoration for plants, wildlife and people through the reclamation of municipal waste sites.
Cost-benefit analysis of rehabilitating old landfills: A case of Beiyangqiao landfill, Wuhan, China
Published in Journal of the Air & Waste Management Association, 2020
Aidana Ospanbayeva, Songlin Wang
To assess the economic and technical feasibility of the existing system, the evaluation was conducted on the basis of data collected from the “Environmental Impact Report of Beiyangqiao Simple Landfill Ecological Restoration Project”. Various innovative tools are currently being used to restore all waste areas. However, for the full restoration of landfills, it is important to first identify all the influencing positive and negative factors. Consequently, statistical assessment is the main prerequisite for designing an ecological landfill restoration project. The main driving factor of each implementation project is the amount of funding available, and the main goal for the project participants is to find an approximate definition of what costs and benefits will arise after the project is established. The purpose of this study was also based on identifying costs and benefits, because CBA has been widely recognized as a useful tool to assess the positive and negative aspects of prospective actions and policies (Kiker et al. 2005; Zhou et al. 2015).