Dissolved organic carbon (DOC) as a parameter of compost maturity

Zmora-Nahum, Sharon; Markovitch, Omer; Tarchitzky, Jorge; Chen, Yona

doi:10.1016/j.soilbio.2005.03.013

Cited by 273 publications

(118 citation statements)

References 28 publications

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“…This correlation was also significant in the last sampling, indicating the sensitivity of collembolan reproduction to sludge addition. This result agrees with other studies that have suggested an enhanced toxicity of organic wastes with low organic matter stability for soil fauna (Domene et al 2008) and plants (Zucconi et al 1981;Pascual et al 1997;Zmora-Nahum et al 2005), a trend that has been more specifically linked to ammonium and other nitrogen forms (Katayama et al 1985;Seniczak et al 1994;Neher 1999). The significant negative correlations of biological endpoints (collembolan survival and plant endpoints) with NPE levels, rather than being a true trend are probably an artefact for two main reasons.…”

Section: Effects Of Amendment With Sludgesupporting

confidence: 92%

Bioassays prove the suitability of mining debris mixed with sewage sludge for land reclamation purposes

et al. 2009

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Background, aim, and scope Mining activities disturb land and reduce its capacity to support a complete functional ecosystem. Reclamation activities in this case are not easy due to the large amount of soil required. This is why mining debris are usually used as surrogate of soil, despite their unsuitable physicochemical properties. However, these properties can be improved with the amendment using an organic source, usually sewage sludge. Nevertheless, the use of sludge might lead to impacts on soil and water ecosystems because of its physicochemical properties and pollutant content. The aim of this study is to assess the suitability of the use of mining debris amended with sewage sludge as practice for the reclamation of land degraded by limestone-quarrying activities. Materials and methods Two different types of mining debris from the same limestone quarry and six different types of composted or thermally dried sewage sludge were studied. A laboratory assessment was carried out by means of standardized bioassays of sludges, together with a field assessment carried out in lysimeters filled with debris-sludge mixtures.The field assessment was carried out using both the soil-waste mixtures, amended with dosages similar to those used for restoration purposes and their corresponding leachates. The variation of physicochemical properties and the outcomes of different bioassays (soil microorganisms biomass and respiration, enzymatic activities, plant emergence and growth, collembolan survival and reproduction, and the Microtox assay) were used as indicators of fertilizing or ecotoxicological effects. Results The mining debris used in our study showed a poor capacity for biological recovery, as shown by the lower biological outcomes measured in control lysimeters compared to lysimeters amended with sludge. The addition of sludge improved debris just before the sludge application in terms of its physicochemical and biological properties (microorganism's biomass, respiration and enzymatic activities) which, in some cases, persisted after a year. Conversely, in some sludges, an inhibition in soil collembolans was observed just before the amendment, but any inhibitory effect disappeared after a year. Concerning the leachates obtained from field lysimeters after a week and a year, no inhibitory effects were detectable for aquatic bacteria. Discussion The effects observed on some of the measured biological endpoints, both in laboratory and field assays, were mainly mediated by physicochemical parameters related to a low stability of organic matter, but in the opposite sense depending on the organism considered. Microbial parameters were enhanced when the organic matter added had a low stability (high content in labile organic matter) but, on the other hand, collembolan performance was negatively affected. The lack of toxicity of leachates indicates a low risk for groundwaters of this reclamation practice.Conclusions The results of this study support the use of mining debris mixed with sludge for land reclamation of

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Section: Effects Of Amendment With Sludgesupporting

confidence: 92%

Bioassays prove the suitability of mining debris mixed with sewage sludge for land reclamation purposes

et al. 2009

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“…Ash content was determined by combustion at 550°C for 8 h. Organic matter was determined by subtraction of ash content, and total organic carbon was calculated as 58% of the organic matter (Zmora-Nahum et al, 2005). Total extractable carbon (TEC) content was obtained by extraction from the sample with 0.1 mol·L −1 of Na 4 P 2 O 7 (pH 9.7) using a sample: extraction ratio of 1:10 and subsequent colorimetric determination (Sims and Haby, 1971).…”

Section: Methodsmentioning

confidence: 99%

Relationship between organic matter humification and bioavailability of sludge-borne copper and cadmium during long-term sludge amendment to soil

Liu

2016

Science of The Total Environment

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“…Although the hot water extracted SOM pool had more intensive signals of carbohydrates, phenols and lignin monomers than cold water extracted SOM [56], the turnover of both hot and cold water extracted SOM pools has been reported as a major pathway of nutrient cycling [26]. The concentration of dissolved organic C, or more precisely water-extractable organic C, has been reported by a number of researchers as a parameter which consistently decreases during the decomposition process, and has therefore been related to the process of stabilization [123]. The conversion of solid organic matter into dissolved organic matter has been shown to be the rate limiting step to the supply of N [24,54] and is therefore, likely to influence C and N dynamics in soil [77].…”

Section: Transformation Of Carbon and Nitrogen During Decompositionmentioning

confidence: 99%

How Important is the Quality of Organic Amendments in Relation to Mineral N Availability in Soils?

et al. 2013

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Summary Wastes generated from municipal and agricultural activities have the tremendous potential for application in agriculture as a source of nutrients and as amendments to improve soil organic matter (SOM). A decline in SOM can represent a serious threat to soil fertility and quality. Nitrogen (N) mineralization from organic amendments is important for understanding the N dynamics in terrestrial ecosystems. In this review, quality of the amendments such as C/N ration, N content, and biochemical compositions, etc. are discussed. Since, C/N ratio cannot explain all differences in N mineralization; emphasis has been laid on characterizing different compounds in organic amendments that govern the mineralization process. The importance of simulation models has also been described in modeling N mineralization from some complex materials like compost, animal manures and farmyard manures. These complex simulation models once modified according to the quality of the organic amendments can simulate N mineralization and thus, they can be used for simulating N dynamics in terrestrial eco-systems.

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Dissolved organic carbon (DOC) as a parameter of compost maturity

Cited by 273 publications

References 28 publications

Bioassays prove the suitability of mining debris mixed with sewage sludge for land reclamation purposes

Bioassays prove the suitability of mining debris mixed with sewage sludge for land reclamation purposes

Relationship between organic matter humification and bioavailability of sludge-borne copper and cadmium during long-term sludge amendment to soil

How Important is the Quality of Organic Amendments in Relation to Mineral N Availability in Soils?

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