scholarly journals Use of Iron (II) Salts and Complexes for the Production of Soil Amendments from Organic Solid Wastes

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Amerigo Beneduci ◽  
Ilaria Costa ◽  
Giuseppe Chidichimo
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Solid Waste ◽  
Waste Treatment ◽  
Organic Matrix ◽  
Reaction Chamber ◽  
Organic Substrate ◽  
Experimental Conditions ◽  
Organic Solid ◽  
Organic Matrices

A method to obtain rapidly stabilized composts for crops from solid organic wastes is evaluated. Here we used a laboratory scale reaction chamber where solid waste treatment was performed under strictly controlled temperature and pressure conditions. The row organic waste was mixed with acid solutions containing iron (II) ions either in the fully hydrated form or in the form of complexes with the diethylentriaminopentaacetic acid. Data from elemental analysis distribution and GC/MS analysis of the polar and non polar dissolved organic matter, clearly showed that Fe(II) ions significantly enhance organic substrate oxidation of the initial solid waste, compared to a material obtained without the addition of the Fe(II) ions to the raw organic matrix. These results suggest that Fe(II) ions might be involved in a catalytic oxidation pathway that would be activated under the experimental conditions used. The extent of the oxidation process was evaluated by the value of the C/N ratio and, qualitatively, by the molecular composition of the dissolved organic matter. After about 6 hours of incubation, dark-brown and dry organic matrices were obtained with C/N ratio as low as 12 and a high degree of oxidative decomposition into low-molecular-weight compounds at high oxidation state.

Copper(II) Binding to Dissolved Organic Matter Fractions in Municipal Solid Waste Incinerator Bottom Ash Leachate

2007 ◽  
Vol 41 (12) ◽  
pp. 4286-4291 ◽  
Author(s):  
Susanna Olsson ◽  
Joris W. J. van Schaik ◽  
Jon Petter Gustafsson ◽  
Dan Berggren Kleja ◽  
Patrick A. W. van Hees
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Bottom Ash ◽  
Waste Incinerator ◽  
Municipal Solid Waste Incinerator ◽  
Organic Matter Fractions ◽  
Solid Waste Incinerator

scholarly journals Co-composting of organic solid waste and sewage sludge – a waste management option for University Campus

2016 ◽  
Vol 5 (1) ◽  
pp. 14-31 ◽  
Author(s):  
Bernard Fei-Baffoe ◽  
Kenneth Osei ◽  
Eric Appiah Agyapong ◽  
Eugene Atta Nyankson
Keyword(s):  
Organic Matter ◽  
Sewage Sludge ◽  
Solid Waste ◽  
Organic Fertilizer ◽  
University Campus ◽  
Organic Solid Waste ◽  
Organic Solid ◽  
General Decline ◽  
Major Nutrients ◽  
Dewatered Sewage Sludge

Co-composting organic solid waste with dewatered sewage sludge was carried out to determine its suitability for managing waste on a University campus. Windrow composting method was employed in which dewatered sewage sludge and organic solid waste were mixed at volume ratios: 1:1, 1:2, 1:3, 0:1 and 1:0 sludge/organic solid waste. Parameters such as pH, percentage N, C, P, K, Ca, Mg, organic matter, ash content and C/N ratio were determined weekly. Total and faecal coliform population were measured biweekly with Pb and Cd levels determined at the beginning and end of the composting. With the exception of ratio 1:0 sludge/organic solid waste, all other ratios attained a favourable Carbon to Nitrogen (C/N) ratio both at the start and end of the composting process. Levels of major nutrients measured were found to be favourable for use as organic fertilizer. There was a general decline in carbon and organic matter in all the compost piles except the sewage sludge pile (1:0). Apart from the compost ratio 1:0 sludge/organic solid waste, all other ratios attained a temperature of 55°C within 8 days of composting. Generally the compost ratios 1:2, 1:3 and 0:1 (sludge/organic solid waste) were found to be the most suitable for use as organic fertilizer.     International Journal of Environment Vol. 5 (1) 2016,  pp: 14-31     

Trace Organic Silicon Analysis Using Atomic Absorption Spectroscopy

1968 ◽  
Vol 22 (5) ◽  
pp. 520-526 ◽  
Author(s):  
Concetta M. Paralusz
Keyword(s):  
Atomic Absorption ◽  
Accurate Determination ◽  
Organic Matrix ◽  
Absorption Spectrometry ◽  
Polydimethyl Siloxane ◽  
Experimental Conditions ◽  
Silicon Compounds ◽  
Organic Silicon ◽  
Organic Matrices

Trace silicon analysis in organic matrix materials is complicated by time-consuming concentration schemes and/or a lack of suitable organic standards. This paper describes an improved technique for quantitative determination of trace amounts of silicon in organic matrices. The method utilizes recent improvements in atomic absorption spectrometry and can be used to determine silicon in levels as low as 0.1 μg/ml in organic solution. Matrix interferences have been overcome by controlling solids of polymers and preparing standards using Si-free matrix materials. Suitable instrumentation and experimental conditions are described. Model organic silicon compounds and polydimethyl siloxane oils have been examined for use as standards. Experimental data, including a comparison of this method with wet-chemical and x-ray results, is presented. This method can be used for accurate determination of trace silicone contamination in the 1–10 ppm range in (1) paper products, (2) resinous and elastomeric polymers, and (3) oils.

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