Long-term effects of amendment with municipal solid waste compost on the elemental and acidic functional group composition and pH-buffer capacity of soil humic acids

García-Gil, Juan Carlos; Ceppi, Silvia; Velasco, Manuel I.; Polo, Alfredo; Senesi, N.

doi:10.1016/j.geoderma.2003.11.004

Cited by 159 publications

(89 citation statements)

References 23 publications

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“…Above that value, buffer capacity increases slightly up to pH=10. The shape of the buffering curves is similar to the shape of buffer capacity curves of HAs reported in the literature (Garcia-Gil, 2004), but the magnitude of â evaluated by us and in the above cited work is different. According to Campitelli (Campitelli et al, 2003) the peaks in Fig.…”

Section: Resultssupporting

confidence: 82%

“…In particular, the back titration method is applied for qualitative and quantitative analysis of the dependence of variable surface charge (Q) on pH, as well as for evaluation of the distribution functions of apparent surface dissociation constants and the amount of particular functional groups (Campitelli et al, 2006;Gondar et al, 2005;Janos et al, 2008). Electrochemical measurements can be also used to perform the analysis of buffer properties of soils and soil components (Lavelle and Spain, 2002;Garcia-Gil et al, 2004;Pertusatti and Prado, 2007;Prado et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Influence of phosphate ions on buffer capacity of soil humic acids

Boguta¹,

Sokołowska²

2012

International Agrophysics

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Influence of phosphate ions on buffer capacity of soil humic acidsThe object of this study was to determine change of natural buffer capacity of humic acids by strong buffering agents, which were phosphate ions. Studies were carried out on the humic acids extracted from peat soils. Additional information was obtained by determination of water holding capacity, density, ash and pH for peats and optical parameter Q4/6for humic acids. Humic acid suspensions exhibited the highest buffer properties at low pH and reached maximum at pH ~ 4. Phosphates possessed buffer properties in the pH range from 4.5 to 8.0. The maximum of buffering was at pH~6.8 and increased proportionally with an increase in the concentration of phosphate ions. The study indicated that the presence of phosphate ions may strongly change natural buffer capacity of humic acids by shifting buffering maximum toward higher pH values. Significant correlations were found for the degree of the secondary transformation with both the buffer capacity and the titrant volume used during titration.

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Section: Resultssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Influence of phosphate ions on buffer capacity of soil humic acids

Boguta¹,

Sokołowska²

2012

International Agrophysics

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“…Furthermore, the presence of weakly acidic chemical functional groups on organic molecules makes organic matter an effective buffer, as supported by the findings of García-Gil et al (2004). These authors observed a long-(9 years) and short-term improvement in the soil humic acid buffering capacity in municipal solid waste compost-amended soils, derived from a residual effect of a single application and cumulative effects from repeated ones.…”

Section: Chemical Fertilitymentioning

confidence: 56%

“…There are reports in the literature of long-term compost and manure application both increasing (Eghball, 2002;García-Gil et al, 2004;Butler and Muir, 2006) and decreasing (Meng et al, 2005;Bastida et al, 2008;Bi et al, 2008) the pH of soils, depending on their initial pH and organic residues. Butler and Muir (2006) observed that soil pH increased on average by 0.5 units as the dairy manure compost rate doubled in magnitude from 11.2 to 179.2 t ha −1 .…”

Section: Chemical Fertilitymentioning

confidence: 99%

Long-term effects of organic amendments on soil fertility. A review

Diacono¹,

Montemurro²

2010

Agron. Sustain. Dev.

1,100

546

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To cite this version:Mariangela Diacono, Francesco Montemurro. Long-term effects of organic amendments on soil fertility. A review. Agronomy for Sustainable Development, Springer Verlag/EDP Sciences/INRA, 2010, 30 (2), <10.1051/agro/2009040>. Agron. Sustain. Dev. 30 (2010) Abstract -Common agricultural practices such as excessive use of agro-chemicals, deep tillage and luxury irrigation have degraded soils, polluted water resources and contaminated the atmosphere. There is increasing concern about interrelated environmental problems such as soil degradation, desertification, erosion, and accelerated greenhouse effects and climate change. The decline in organic matter content of many soils is becoming a major process of soil degradation, particularly in European semi-arid Mediterranean regions. Degraded soils are not fertile and thus cannot maintain sustainable production. At the same time, the production of urban and industrial organic waste materials is widespread. Therefore, strategies for recycling such organic waste in agriculture must be developed. Here, we review long-term experiments (3-60 years) on the effects of organic amendments used both for organic matter replenishment and to avoid the application of high levels of chemical fertilizers. The major points of our analysis are: (1) many effects, e.g. carbon sequestration in the soil and possible build-up of toxic elements, evolve slowly, so it is necessary to refer to long-term trials. (2) Repeated application of exogenous organic matter to cropland led to an improvement in soil biological functions. For instance, microbial biomass carbon increased by up to 100% using high-rate compost treatments, and enzymatic activity increased by 30% with sludge addition. (3) Long-lasting application of organic amendments increased organic carbon by up to 90% versus unfertilized soil, and up to 100% versus chemical fertilizer treatments. (4) Regular addition of organic residues, particularly the composted ones, increased soil physical fertility, mainly by improving aggregate stability and decreasing soil bulk density. (5) The best agronomic performance of compost is often obtained with the highest rates and frequency of applications. Furthermore, applying these strategies, there were additional beneficial effects such as the slow release of nitrogen fertilizer. (6) Crop yield increased by up to 250% by long-term applications of high rates of municipal solid waste compost. Stabilized organic amendments do not reduce the crop yield quality, but improve it. (7) Organic amendments play a positive role in climate change mitigation by soil carbon sequestration, the size of which is dependent on their type, the rates and the frequency of application. (8) There is no tangible evidence demonstrating negative impacts of heavy metals applied to soil, particularly when high-quality compost was used for long periods. (9) Repeated application of composted materials enhances soil organic nitrogen content by up to 90%, storing it for mineralization in future cropping...

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“…the total concentration of all the species, containing a given ion, while i C  is its molar quantity in the solid phase in 1 L of solution [14][15][16][17][41][42].…”

Section: Theoretical Partmentioning

confidence: 99%

Buffer Capacity in Heterogeneous Multicomponent Systems. Review

Spînu¹,

Povar²

2015

ChemJMold

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Abstract. The quantitative basis of the theory of buffer properties for two-phase acid-base buffer systems and for multicomponent heterogeneous systems has been derived. The analytical equations for buffer action with respect to all components for diverse multicomponent systems were deduced. It was found a remarkable relation of proportionality between β i quantities. It is shown, that the buffer properties in relation to the solid phase components are amplifi ed with an increase of solubility due to protolytic or complex formation equilibria in saturated solutions. It has been established, that the buffer capacities of components are mutually proportional, whereas for heterogeneous systems these relationships depend on the stoichiometric composition of solid phases. The deduced equations can be applied to the assessment of buffer action of the systems "Natural mineral -soil solution", containing soluble and insoluble chemical species. A number of the important conclusions concerning the investigated buffer systems has been made. The obtained results can be used in various areas of chemical and biochemical researches, especially in soil science, ecological sciences, analytical chemistry, pharmacology, pharmaceutics, medical industry and synthetic organic chemistry Keywords: buffer action, complex formation, thermodynamic stability, extraction multicomponent system, heterogeneous equilibria. IntroductionBuffer capacity is an important concept in many areas of science: analytical and electroanalytical chemistry [7], etc. The capacity of buffer systems to oppose (resist) to the variation of their composition (usually to рН changes) by infl uence of external fl uxes of chemical compounds of natural or anthropogenic character, that shift chemical equilibria, is called buffer property, and its effi ciency -buffer action. Despite of an abundance of the information on buffer systems, the quantitative theory of buffer action has been developed only for mono-phase systems [8,9]. The buffer action of mono-phase buffers is usually based on protolytic equilibria between water, a weak acid or base or ampholytic compound and their conjugate pairs [10,11]. The widespread use of buffers as well as the variety of chemical processes and phenomena associated with a certain acidity of solutions explains the constant interest in designing and studying new buffer systems.Unlike the classical mono-phase buffer systems in which the buffer components are dissolved in a unique phase, in two-phase (heterogeneous) buffers they are distributed between two phases: in aqueous phase and solid (gaseous or liquid) phase. The aqueous (buffer) phase contains all the charged particles and a restricted quantity of electro-neutral species. The solid phase contains in signifi cant quantities only electro-neutral particles and serves as their reservoir by means of which the equilibrium is adjusted and one of parameters of buffer system is maintained constantly [9][10][11][12][13][14][15][16][17][18]. The buffer action of two-phase systems is based on ...

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Long-term effects of amendment with municipal solid waste compost on the elemental and acidic functional group composition and pH-buffer capacity of soil humic acids

Cited by 159 publications

References 23 publications

Influence of phosphate ions on buffer capacity of soil humic acids

Influence of phosphate ions on buffer capacity of soil humic acids

Long-term effects of organic amendments on soil fertility. A review

Buffer Capacity in Heterogeneous Multicomponent Systems. Review

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