The ultimate objective of post-mine land-use and reclamation planning is to identify appropriate alternate land uses to which mined land could be put. This will ensure that land-use and morphology of the location will be capable of supporting either the prior land-use or pre-mining environment. The main challenge is usually, the choice of variables that must be considered in deciding a particular post-mining land-use. Literature reviews were conducted to identify the major factors needed to be considered in the selection of a post-mining land-use. This paper also looks at the most commonly practiced and accepted post-mining land-use techniques. Factors identified as important in the selection process include land resources (e.g. physical, biological and cultural characteristics), ownership, type of mining activity, legal requirements, location, needs of the community, economic, environmental, technical and social factors. In a broad categorization, all post-mining land-uses could be placed under one of the following land-use: agriculture, forestry, lake or pool, intensive recreational land-use, non-intensive recreational land-use, conservation and pit backfilling. However, the objective of any particular post-mining land use should be achieving economic and sustainable outcomes which meet human wants and needs, and protect life and the environment.
The effects of coastal environment and flue gases are major problems on the operations of industrial machines and the situation is not different at Takoradi Thermal Power Station (TTPS). It was observed that the relative humidity in the area coupled with the production of chloride ions and the formation of ammonium nitrate and ferric hydroxide are the major causes of corrosion at the plant. This paper sought to identify the causes of corrosion and their effects on machinery at TTPS. The major occurrence of corrosion was found to be pitting corrosion and induced stress corrosion cracking occurring on the tanks, pipes and tubes in the Heat Recovery Steam Generator (HRSG). Consequently, this has led to the leaking of pipes, tanks and loss of production. The use of epoxy paint on the pipes and tanks will go along way to reduce the effects.
The use of plastics has increased over the past two to three decades especially in the areas of medicine, engineering and domestic application. Consequently, it consumption has generated increase in industrial and domestic waste. Since most plastics are not biodegradable they tend to have adverse short and long term effects on the environment, living organisms and the economy and the situation is not different in Ghana. Although some efforts are being made to reclaim the waste, it is very prudent that recycling of the collected waste is included in this scheme. This paper seeks to outline the design of a machine to recycle plastic waste. This will help keep the environment clean, safe, save energy and will also leads to resource recovery and the creation of jobs for the unemployed.
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