Appraisal of gastropod shell as calcium ion source for phosphate removal and recovery in calcium phosphate minerals crystallization procedure

Oladoja, N.A.; Ololade, Isaac Ayodele; Adesina, Abiola Olanike; Adelagun, R.O.A.; Sani, Yahaya Muhammad

doi:10.1016/j.cherd.2012.09.017

Cited by 30 publications

(8 citation statements)

References 27 publications

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“…The results revealed that the increase of organic loading rate can decrease the effluent pH, which enhanced the activity of phosphate reduction bacteria [31]. This was in accordance with the theory in which organic loading rate had no significant effect on the PO 4 3− -P removal efficiency [32]. When organic loading rate was 2.0, 3.0, and 4.0 kg COD/m 3 /day, the effluent pH was 7.13, 7.15, and 7.09, respectively.…”

Section: Resultssupporting

confidence: 78%

Influence of organic loading rate on integrated bioreactor treating hypersaline mustard wastewater

Kang

Chai

Yang

et al. 2015

Biotech and App Biochem

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Mustard tuber wastewater is characterized by high salinity and high organic content that is potentially detrimental to the biological treatment system and affects the treatment efficiency accordingly. The experiment used the integrated bioreactor to reduce much of the organics in mustard tuber wastewater, and found the influence of organic loading rate on effluent chemical oxygen demand (COD) and phosphate (PO4 (3-) -P). Results showed that under the condition of 10-15 °C, 6 mg/L of dissolved oxygen, the reduction value of COD removal rate in anaerobic and aerobic area was 14.5% and 31.7% when the organic loading rate increased from 2.0 to 4.0 kg COD/m(3) /day. Therefore, an integrated bioreactor should take 2.0 kg COD/m(3) /day organic loading rate in mustard wastewater treatment if the effluent is expected to meet the third level of "Integrated Wastewater Discharge Standard" (GB 8978-1996).

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Section: Resultssupporting

confidence: 78%

Influence of organic loading rate on integrated bioreactor treating hypersaline mustard wastewater

Kang

Chai

Yang

et al. 2015

Biotech and App Biochem

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“…The XRD results showed that without the seeding material, only whitlockite, Ca 18 Mg 2 (HPO 4 ) 2 (PO 4 ) 12 is present. With the presence of seeding materials, HAp crystallisation is enhanced [74, 75, 76]. Thus, from the XRD results, HAp was the main phase present in the precipitates and a few peaks corresponding to whitlockite was also present.…”

Section: Main Textmentioning

confidence: 99%

“…Thus, from the XRD results, HAp was the main phase present in the precipitates and a few peaks corresponding to whitlockite was also present. Magnesium contained in the microalgae and the HPO 4 2− which is the predominant phosphate in algal hydrolysate favoured whitlockite formation [76]. Thus, the seeding of synthetic HAp is needed to facilitate HAp crystallization from the algal hydrolysate.…”

Section: Main Textmentioning

confidence: 99%

Syntheses of hydroxyapatite from natural sources

Pu'ad

Koshy

Abdullah

et al. 2019

Heliyon

252

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Waste materials from natural sources are important resources for extraction and recovery of valuable compounds. Transformation of these waste materials into valuable materials requires specific techniques and approaches. Hydroxyapatite (HAp) is a biomaterial that can be extracted from natural wastes. HAp has been widely used in biomedical applications owing to its excellent bioactivity, high biocompatibility, and excellent osteoconduction characteristics. Thus, HAp is gaining prominence for applications as orthopaedic implants and dental materials. This review summarizes some of the recent methods for extraction of HAp from natural sources including mammalian, aquatic or marine sources, shell sources, plants and algae, and from mineral sources. The extraction methods used to obtain hydroxyapatite are also described. The effect of extraction process and natural waste source on the critical properties of the HAp such as Ca/P ratio, crystallinity and phase assemblage, particle sizes, and morphology are discussed herein.

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“…On-site wastewater treatment systems that attenuate biological pollutants (Pell et al 1990;Farrell et al 1990;Lens et al 1994) and those that operate on the principle of resource recovery (e.g. water, nutrient, energy, precious metal) have been reported in different treatise (Barbosa et al 2016;Biswas et al 1999;Oladoja et al 2013Oladoja et al , 2015Oladoja et al , 2016Mackey et al 2014;Diener 2014).…”

Section: On-site Water Treatment Systemsmentioning

confidence: 99%

Appropriate technology for domestic wastewater management in under-resourced regions of the world

Oladoja

2016

Appl Water Sci

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Centralized wastewater management system is the modern day waste management practice, but the high cost and stringent requirements for the construction and operation have made it less attractive in the under-resourced regions of the world. Considering these challenges, the use of decentralized wastewater management system, on-site treatment system, as an appropriate technology for domestic wastewater treatment is hereby advocated. Adopting this technology helps save money, protects home owners' investment, promotes better watershed management, offers an appropriate solution for low-density communities, provides suitable alternatives for varying site conditions and furnishes effective solutions for ecologically sensitive areas. In the light of this, an overview of the on-site treatment scheme, at the laboratory scale, pilot study stage, and field trials was conducted to highlight the operational principles' strength and shortcomings of the scheme. The operational requirements for the establishing and operation of the scheme and best management practice to enhance the performance and sustenance were proffered.

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Appraisal of gastropod shell as calcium ion source for phosphate removal and recovery in calcium phosphate minerals crystallization procedure

Cited by 30 publications

References 27 publications

Influence of organic loading rate on integrated bioreactor treating hypersaline mustard wastewater

Influence of organic loading rate on integrated bioreactor treating hypersaline mustard wastewater

Syntheses of hydroxyapatite from natural sources

Appropriate technology for domestic wastewater management in under-resourced regions of the world

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