Application of controlled nutrient release to permeable reactive barriers

Freidman, Benjamin L.; Gras, Sally L.; Snape, Ian; Stevens, Geoffrey W.; Mumford, Kathryn A.

doi:10.1016/j.jenvman.2015.12.002

Cited by 6 publications

(14 citation statements)

References 24 publications

(52 reference statements)

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“…The study compliments other recent CRN material investigations at low temperatures and aims to examine the physical and chemical response of CRN materials to freeze–thaw cycling. The CRN materials varied in coating composition to assess freeze–thaw susceptibility and were evaluated against a non‐polymer coated material, Zeopro™.…”

Section: Introductionmentioning

confidence: 83%

“…The mineral fillers dispersed into the ethylene‐vinyl acetate coating of Nutricote™ have been reported to provide resistance to cracking while the Polyon™ coating is reported to provide flex capacity as well as solvent resistance . Osmocote™, Nutricote™ and Polyon™ granules were sieved to 5 × 8 US mesh (4000–2380 μm) before use.…”

Section: Methodsmentioning

confidence: 99%

“…Water samples were acidified with 1% nitric acid and analysed for potassium (K + ) and calcium (Ca 2+ ) using a Varian 720‐ES inductively coupled plasma‐optical emission spectrometry (ICP‐OES) . Calcium was only measured in Zeopro™ and Zeopro™‐GAC samples as nutrient release is regulated by dissolution of the calcium phosphate coating .…”

Section: Methodsmentioning

confidence: 99%

“…The CRN materials varied in coating composition to assess freeze–thaw susceptibility and were evaluated against a non‐polymer coated material, Zeopro™. Granular activated carbon (GAC), used to adsorb PHCs, was also mixed with Zeopro™ to better understand the application of CRN materials to permeable reactive barriers (PRB) . This is the first time that physical and chemical assessment of a broad range of polymer and non‐polymer CRN materials, encompassing application to PHC capture and degradation in groundwater, has been conducted for suitability testing to inform cold region bioremediation.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Freeze–Thaw Phenomena on Controlled Nutrient Release: Application to Bioremediation

Freidman

Gras

Snape

et al. 2016

CLEAN Soil Air Water

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Cold region soils are often devoid of sufficient nutrients essential for timely bioremediation of petroleum hydrocarbon contaminants. While materials that release nutrients in a controlled manner have been shown to stimulate biodegradation over extended time periods, the physical and chemical response of these materials to repetitive freeze-thaw stresses typical of cold regions remains poorly understood. This study reports the performance of four controlled release materials in water (Osmocote TM , Nutricote TM , Polyon TM , Zeopro TM ) exposed to freeze-thaw cycling or control temperature of 4°C. Additionally Zeopro TM -activated carbon mixtures are investigated for application to permeable reactive barriers. Osmocote TM experienced higher nutrient release under control conditions compared with samples exposed to freeze-thaw after 20 days. Nutrient release from Nutricote TM and Polyon TM was similar under freeze-thaw and control conditions. Zeopro TM delivered low nutrient concentrations into solution in both freeze-thaw and control samples with calcium phosphate dissolution accelerated in the presence of activated carbon. Osmocote TM , Nutricote TM and Polyon TM revealed strong resistance to breakdown under freeze-thaw. Zeopro TM experienced only partial disintegration, while significant break-up of activated carbon occurred under freezethaw. A physical and chemical understanding of the response of multiple fertilisers can guide the selection of materials for biostimulation and biodegradation of petroleum hydrocarbons in environments exposed to freeze-thaw cycling.Abbreviations: CRN, controlled release nutrient; FESEM, field emission scanning electron microscopy; GAC, granular activated carbon; ICP-OES, inductively coupled plasma-optical emission spectrometry; PHC, petroleum hydrocarbon; PRB, permeable reactive barrier.

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Section: Introductionmentioning

confidence: 83%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Freeze–Thaw Phenomena on Controlled Nutrient Release: Application to Bioremediation

Freidman

Gras

Snape

et al. 2016

CLEAN Soil Air Water

Self Cite

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show abstract

“…Therefore, a controlled release technology should be developed to overcome the disadvantages of the conventional ethanol emitters. Controlled release technologies involve the combination of an active substance with a matrix that can control the release of the active substance into the environment over a specific time and at a certain rate, thus maintaining an effective concentration of the substance within the system, 11 Controlled release technology has been widely applied in the fields of food, 12 medicine and 13 the environment, 14 etc. Park et al 15 reported that the mesoporous silica structures of MCM-41 and SBA-15 were synthesized as porous vectors for the controlled release of allyl isothiocyanate with the aim of controlling yeast and Gram-negative bacteria.…”

Section: Introductionmentioning

confidence: 99%