Production and Application of Agar-based Slow-release Fertilizers, in the Bioremediation of Petroleum Hydrocarbon-impacted Soil

Sampson, T; Ogugbue, Chimezie Jason; Okpokwasili, G. C.

doi:10.9734/bbj/2016/25955

Cited by 3 publications

(4 citation statements)

References 19 publications

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“…Poultry and soybean waste are organic in nature and organic manures are believed to be slow release in nature and may be affected by the early stage nutrient deficiency phenomena as stated by Sampson et al, (2016). It follows that at the early state the nutrients are released at rates that do not support much microbial growth necessary for high microbial proliferation, compared to the direct inorganic fertilizer application.…”

Section: Bacterial Population Dynamics In Soil During Bioremediationmentioning

confidence: 99%

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2019

IRJPEH

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The aim of this study is to evaluate the effect of soy bean and poultry residues and its applicability in the remediation of a long term crude oil contaminated soil. Crude oil contaminated and uncontaminated soil samples were randomly collected at 0-30 cm depth from subsurface horizon soil. The controlled experimental setups with different nutrient formulations were exposed to natural weather conditions for 365 days. Crude oil-contaminated soil samples were collected from Bodo West community in Gokana Local Government Area of Rivers State at sites. The Crude oil impacted soil sample was put into six vessels, four of which contained different nutrient amendments (25g of each nutrient formulation) and two untreated controls. Soybean, poultry droppings, NPK fertilizer and a combined nutrient formulation served as the sources of nutrients. The inorganic NPK fertilizer was observed to be more effective in the proliferation of total heterotrophic bacterial population. However, the application of these nutrient sources in combined form was found to be more effective than their individual application. All the sources of nutrient were observed to significantly (p< 0.05) induce bacterial proliferation and enhanced the natural attenuation of hydrocarbon pollutants in the soil, compared to the control sample. The efficacy of soy bean and poultry residues as organic nutrients as well as their application in enhancing natural attenuation has been determined from this study. The combined nutrient formulation was observed to be more efficient than the single application of the nutrient sources. These findings are crucial in developing a large scale strategy for field-based applicationsin this long termcrude oil polluted region. This research therefore provides crucial insight for future projects involving optimization of nutrient utilization and degrading abilities of indigenous microbial population.

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Section: Bacterial Population Dynamics In Soil During Bioremediationmentioning

confidence: 99%

Untitled

2019

IRJPEH

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“…Recently, super-absorbent hydrogels and synthetic hydrogels have shown significant promise in the market, whereas natural hydrogels have drawn more attention because of their availability, environmental safety, and cost-effectiveness [27,28]. Among these natural hydrogels, chitosan- [29], starch- [3], cellulose- [30], gelatin- [31], and algae-based hydrogels including alginate [32], carrageenan [33], agar [34] and agarose [35] have attracted great research interest towards slow-release fertilizer applications.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous studies have discovered that agar can be employed as a matrix for the prolonged release of pharmaceuticals [48][49][50]. The study conducted by Sampson et al [34] explored the use of agar as a coating material for soluble NPK fertilizer in both capsular and granular slow-release formulations. In contrast, agar hydrogel is utilized in a double network hydrogel system with starch for herbicide control release, and it has been shown that agar helps promote soil health [51].…”

Section: Introductionmentioning

confidence: 99%

Exploring the Potential of 3D-Printable Agar–Urea Hydrogels as an Efficient Method of Delivering Nitrogen in Agricultural Applications

Dissanayake,

Najaf Zadeh,

Nazmi

et al. 2024

Polysaccharides

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Amidst population growth and challenges with existing fertilizers, the development of smart and environmentally friendly agrochemicals is imperative. While 3D printing is widespread, its potential in slow-release agrochemicals remains unexplored. This proof-of-concept study employed solvent casting and 3D printing to develop agar–urea structures. These structures, comprising 2.5% (w/w) agar, incorporated either 7% (w/w) or 13% (w/w) urea as nitrogen nutrients. Rheological, mechanical, and morphological properties and sorption capabilities were explored. Rheological analysis revealed a substantial impact of urea, enhancing material resistance to deformation. In mechanical tests, inclusion of urea showed no significant impact on compressive strength. SEM analysis confirmed the successful entrapment of urea within the agar matrix. The inclusion of urea resulted in a diminished water sorption capacity, attributed to the urea–water interactions disrupting the hydrogen bonding ability of agar. Agar–urea inks were employed in 3D printing utilizing the direct-ink writing technique, and the nitrogen release behavior was investigated. Results revealed nearly complete urea release in the positive control within 48 h. In contrast, agar–urea formulations with 7% (w/w) and 13% (w/w) achieved nitrogen release rates of 88.8% and 94.4%, respectively, suggesting potential for 3D-printed agar formulations to modify the immediate release behavior seen in conventional urea fertilizers.

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“…One of the most critical steps are choosing the right carrier for a new bioinoculant formulation, its combination with the microorganisms in the basal medium as well as the selection of a highly effective strain (Bargaz et al, 2018). Bioinoculants for seeds pre-inoculation formulated on carriers such as sodiumalginate (SA), agar (A) and polyvinylpyrrolidone (PVP) are proven to have a great potential, mostly due to their ability to gradually release fertiliser in the soil during the time (Sampson et al, 2016;Bargaz et al, 2018;Ramli, 2019). Furthermore, these carriers do not interfere with the survival of rhizobial cells in the biofertilizer.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of alfalfa seed priming and rhizobial-based liquid inoculants in an Eutric Cambisol

Buntić

Stajković-Srbinović

Knežević

et al. 2021

Zemdirbyste-Agriculture

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In the last few decades, peat-based bioinoculants have been proven as successful in alfalfa (Medicago sativa L.) seeds inoculation. However, the use of liquid inoculants or pre-inoculated seeds will greatly facilitate the sowing of alfalfa as a small seed legume. Therefore, this study evaluated the effect of four liquid formulations on the survival of Sinorhizobium (Ensifer) meliloti strain 218 during long-term storage. Sodium-alginate (SA) and polyvinylpyrrolidone (PVP) did not affect the growth of S. meliloti strain 218 and showed a significant positive effect on its survival in liquid bioinoculants up to 240 days of storage. The effect of seeds pre-inoculation on the efficiency of nitrogen (N) fixation in alfalfa plants in test tube and a two-year field experiment was measured. The field experiment was conducted in 2018 and 2019 in an Eutric Cambisol. The dry weight of alfalfa shoots and total N content significantly increased in pre-inoculated seeds with all media, compared to the control treatments without pre-inoculation and adding mineral N. In both years of cultivation, the highest total shoot dry weight was achieved by seeds pre-inoculation with SA and PVP 3 months before sowing. Furthermore, in these treatments, shoot dry weight significantly increased compared to the treatment with mineral N in the 2 nd (2019) year. The results of the research showed that rhizobial bioinoculants with SA and PVP could be used as liquid bioinoculants as well as for successful pre-inoculation of alfalfa seeds.

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Production and Application of Agar-based Slow-release Fertilizers, in the Bioremediation of Petroleum Hydrocarbon-impacted Soil

Cited by 3 publications

References 19 publications

Untitled

Untitled

Exploring the Potential of 3D-Printable Agar–Urea Hydrogels as an Efficient Method of Delivering Nitrogen in Agricultural Applications

Efficiency of alfalfa seed priming and rhizobial-based liquid inoculants in an Eutric Cambisol

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