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Control of the mobility of heavy metals in soil from disposal of bio-solid and olive by-product ashes using waste additives
2020
Vamvuka, D. | Papaiōannou, G. | Alexandrakis, S. | Stratakis, A.
In compliance to European Union directives to reuse urban wastes as secondary fuels, the aim of present work was to investigate and control the environmental impact from disposal of ashes generated by combustion of a bio-solid, an olive by-product and their blend. Two waste materials were admixed with the ash and their performance as potential stabilizers was assessed. Metals and ions leached through a soil were measured.The results showed that dissolution of some alkaline substances raised the pH of water effluents, decreasing the extractability of heavy metals from the ashes. In some cases Cr and As leached reached hazardous levels. Upon addition of waste materials to ash, the concentration of Cr in liquid extracts was reduced by 35–97%, while that of Cu and As by 100%. All heavy metal values measured in the leachates were decreased to values below legislation limits. The mineralogy, the chemistry and the pH of solids involved were key factors for the retention of elements.
Показать больше [+] Меньше [-]Chemical and spectroscopic analysis of organic matter transformations during composting of pig manure
1999
Hsu JennHung | Lo ShangLien (Graduate Institute of Environmental Engineering, National Taiwan University, 71 Chou-Shan Road, Taipei (Taiwan))
[Risk assessment of pollution components leached from cinders]
1992
Thygesen, N. | Larsen, F. | Hjelmar, O.
Experimental Study of Bagasse Ash Utilisation for Road Application on Expansive Soil
2015
Rajakumar C. | Meenambal T.
Expansive soils show extensive volume and their strength changes at varying moisture content due to their chemical composition. This causes significant structural damage to foundations, including pavements. One way of overcoming these problems in soils is to stabilize them with admixtures. Owing to this fact, continuous researches have been carried out and still being carried out by individuals, firms and institutions on ways to improve the engineering properties of soils. The need to bring down the cost of soil stabilizers and the environmental damage has led to intense global research towards economic utilization of wastes for engineering purposes. Bagasse ash is a waste-product of the sugar refining industry. This study was carried out to determine the effect of bagasse ash utilization for road application on clay. The laboratory investigations are carried out to examine the index and engineering properties of the soil sample. The soil falls under CI category of Indian standard soil classification system. The experiments have been carried out to study the changes in the properties of soil such as plasticity characteristics, free swell index, pH, calcium carbonate content, total dissolved solids and cation exchange capacity using bagasse ash in varying percentages of 2%, 4%, 6%, 8% and 10%. The study shows promising results with effective utilization of bagasse ash in the improvement of soil strength.
Показать больше [+] Меньше [-]The liming of forest soils in Finland
1989
Derome, J. | Paetilae, A. (The Finnish Forest Research Institute, Vanda (Finland))
Phosphorus availability to corn from wood ash-amended soils
1992
Erich, M.S. (Maine Univ., Orono, ME (USA). Dept. of Plant, Soil and Environmental Sciences) | Ohno, T.
Fly ashes as an amendment in cultivated soils
1987
Cervelli, S. (Istituto per la Chimica del Terreno, Pisa (Italy)) | Petruzzelli, G. | Perna, A.
The short-term effects of wood-ash amendment on forest soils
1990
Unger, Y.L. (Maine Univ., Orono, ME (USA). Dept. of Plant and Soil Sciences) | Fernandez, I.J.
The effect of refuse incinerator fumes on the lead and cadmium content of experimentally exposed corticolous lichens
1998
Gombert, S. (Joseph Fourier Univ., Grenoble (France). Centre de Biologie Alpine) | Asta, J.
Plant availability of lead, cadmium, and boron in amended coal ash
1991
Schwab, A.P. (Kansas State Univ., Manhattan, KS (USA). Dept. of Agronomy) | Tomecek, M.B. | Ohlenbusch, P.D.