Solubility and Dissolution in Terms of Generalized Approach to Electrolytic Systems Principles

Michałowska-Kaczmarczyk, Anna Maria; Michałowski, Tadeusz; Toporek, Marcin; Pietrzyk, Andrzej

doi:10.4236/jasmi.2015.54006

Cited by 2 publications

(3 citation statements)

References 18 publications

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“…Struvite precipitation process and conditions have been extensively reviewed, reproduced, and optimized for different wastewater sources by several scientists at both in vitro and pilot scales (Kataki et al 2016). The crystallized product shows compositional shifts depending upon the conditions used; mostly the molar ratio for N, P and Mg ions has extensively been altered to achieve the best precipitates in a number of studies (Negrea et al 2010;Michałowska-Kaczmarczyk and Michałowski 2014;Michałowska-Kaczmarczyk et al 2015). The P content usually ranges as 11-26% in struvite based on the crystallization method (Johnston and Richards 2003), and only 1-2% is considered water-soluble (Bridger et al 1962).…”

Section: Introductionmentioning

confidence: 99%

Acidithiobacillus thiooxidans IW16 and Sulfur Synergistically with Struvite Aggrandize the Phosphorus Bioavailability to Wheat in Alkaline Soil

Khan

Jilani

Zhang

et al. 2019

J Soil Sci Plant Nutr

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Environmentally hazardous wastewaters from various origins could prove an impending source for phosphorus (P) recovery as struvite. This study aimed to employ an eco-friendly approach for P utilization from struvite, and to neutralize its alkaline effect in the soil through supplementation of sulfur-oxidizing bacteria (SOB) Acidithiobacillus thiooxidans IW16. Struvite precipitated and recovered from wastewater was tested for P release and bioavailability to grow wheat in alkaline soil under greenhouse conditions. Treatments were control (no P application), P from single superphosphate (SSP) fertilizer, P from struvite, P from struvite + sulfur (100 mg kg −1 of soil), and P from rock phosphate; and all these treatments were compared with and without SOB inoculation through irrigation water. Struvite application, especially with sulfur and/or SOB, maintained an adequate P level (as with SSP fertilizer) in both wheat plants and soil throughout the growing period. Wheat plant agronomic attributes were also improved with struvite as for SSP fertilization. Moreover, supplementation of SOB inoculum with struvite and other P sources significantly improved the P bioavailability and crop yield through increased phosphate solubility in alkaline soil. In conclusion, inoculation of SOB especially with sulfur (S) supplementation in struvite treatment caused the pH reduction of alkaline soil through S oxidation (H 2 SO 4 formation), which solubilized the fixed-P in struvite as well as soil and thus improved P bioavailability to wheat plants. These findings strengthen the concept of struvite scavenging from wastewater for environmental safety, and to introduce it as an alternative resource for P fertilization.

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Section: Introductionmentioning

confidence: 99%

Acidithiobacillus thiooxidans IW16 and Sulfur Synergistically with Struvite Aggrandize the Phosphorus Bioavailability to Wheat in Alkaline Soil

Khan

Jilani

Zhang

et al. 2019

J Soil Sci Plant Nutr

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“…Ultimately, GEB, charge and elemental/core balances are expressed in terms of molar concentrations-to be fully compatible with expressions for equilibrium constants, interrelating GEB is perceived as the law of matter conservation, as the general law of nature related to electrolytic (aqueous, non-aqueous or mixed-solvent media) redox systems and as a synthesis of physical and chemical laws [1,14,15,23,24,27]. This law can also be extended on the systems with mixed (e.g., binary) solvents with amphiprotic (protophilic and protogenic) and aprotic properties.…”

Section: Some Generalizing Remarks On Gebmentioning

confidence: 99%

“…This way, the general properties of 2•f(O)�f(H) in non-redox and redox systems are distinguished, see Refs. [7][8][9][10][11][12][13][14][15][16][17][18] and earlier references cited therein.…”

Section: Introductionmentioning

confidence: 99%

A Distinguishing Feature of the Balance 2∙f(O)−f(H) in Electrolytic Systems: The Reference to Titrimetric Methods of Analysis

Michałowska-Kaczmarczyk¹,

Spórna‐Kucab²,

Michałowski³

2017

Advances in Titration Techniques

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The balance 2•f(O)�f(H) provides a general criterion distinguishing between electrolytic redox and non-redox systems of any degree of complexity, in aqueous, non-aqueous and mixed-solvent media. When referred to redox systems, it is an equation linearly independent on charge (ChB) and elemental/core balances f(Y g) for elements/cores Y g 6 ¼ H and O, whereas for non-redox systems, 2•f(O)�f(H) is linearly dependent on these balances. The balance 2•f(O)�f(H) formulated for redox systems is the primary form (pr-GEB) of the generalized electron balance (GEB) as the fundamental equation needed for resolution of these systems. Formulation of GEB for redox systems needs no prior knowledge of oxidation numbers for all elements of the system. Any prior knowledge of oxidation numbers for all elements in components forming a redox system and in the species of the system thus formed is not necessary within the Approach II to GEB. Oxidants and reductants are not indicated. Stoichiometry and equivalent mass are redundant concepts only. The GEB, together with charge balance and concentration balances for elements 6 ¼ H and O, and the complete set of independent equations for equilibrium constants form an algorithm, resolvable with use of an iterative computer program. All attainable physicochemical knowledge can be included in the algorithm. Some variations involved with tests of possible reaction paths for metastable systems can also be made. The effects of incomplete physicochemical knowledge on the system can be also tested. One of the main purposes of this chapter is to provide the GEB formulation needed for resolution of redox systems and familiarize it to a wider community of chemists.

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Solubility and Dissolution in Terms of Generalized Approach to Electrolytic Systems Principles

Cited by 2 publications

References 18 publications

Acidithiobacillus thiooxidans IW16 and Sulfur Synergistically with Struvite Aggrandize the Phosphorus Bioavailability to Wheat in Alkaline Soil

Acidithiobacillus thiooxidans IW16 and Sulfur Synergistically with Struvite Aggrandize the Phosphorus Bioavailability to Wheat in Alkaline Soil

A Distinguishing Feature of the Balance 2∙f(O)−f(H) in Electrolytic Systems: The Reference to Titrimetric Methods of Analysis

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