Removal of phosphorus/selenium from aqueous solutions by adsorption processes

Bhojappa, Shilpa

doi:10.33915/etd.4441

Cited by 3 publications

(5 citation statements)

References 30 publications

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“…So far, numerous available technologies for controlling PO 4 3À pollution can be grouped into chemical, biological and physical methods (Benyoucef and Amrani, 2011;Bhojappa, 2009). Though chemical precipitation and biological processes are most commonly used, adsorption has attracted an increasing attention, with http://dx.doi.org/10.1016/j.biortech.2014.06.075 0960-8524/Ó 2014 Elsevier Ltd. All rights reserved.…”

Section: Introductionmentioning

confidence: 99%

A comparative study on different metal loaded soybean milk by-product ‘okara’ for biosorption of phosphorus from aqueous solution

Ngo

Guo

Nguyễn

et al. 2014

Bioresource Technology

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Cationization of agricultural by-products using metal salts is widely used to activate their phosphorous capture ability. This study developed three kinds of new metal loaded soybean milk by-product 'okara' for phosphorus biosorption. A comparative study among these biosorbents was carried out with respect to their performances in terms of affinity, stability and reusability. Zirconium loaded okara (ZLO) was found to have the highest affinity towards PO(4)(3-) anions (47.88 mg/g), followed by iron/zirconium loaded okara--IZLO (40.96 mg/g) and iron loaded okara--ILO (16.39 mg/g). ZLO was successfully desorbed with 0.2M NaOH and activated with 0.1 HCl prior to the next cycle. After five consecutive cycles, the efficiency of both adsorption and desorption of ZLO remained about 85% whilst no Zr(IV) leakage was observed. Conversely, IZLO and ILO suffered from vital short comings such as high metal release and/or sharp reduction in PO4(3-) sequestering capability after multi operation cycles.

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Section: Introductionmentioning

confidence: 99%

A comparative study on different metal loaded soybean milk by-product ‘okara’ for biosorption of phosphorus from aqueous solution

Ngo

Guo

Nguyễn

et al. 2014

Bioresource Technology

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show abstract

“…Nowadays, a series of techniques for removing phosphate from aquatic environment have been developed. These techniques can be classified as chemical methods (precipitation, crystallization, ion exchange and adsorption), biological methods (assimilation, enhanced biological phosphorous removal -EBPR, constructed wetlands, waste water stabilization pond) and physical methods (microfiltration, reverse osmosis, electrodialysis and magnetic separation) (Nguyen et al 2014a, Bhojappa 2009, Benyoucelf & Amrani, 2011, De-Bashan & Bashan 2004, Tian et al 2017, Geng 2018, Irdemez 2006. Of these methods, biological methods and chemical precipitation are the most commonly used.…”

Section: -mentioning

confidence: 99%

Removal and Recovery of Phosphate from Water and Wastewater Using Metal-Loaded Agricultural Waste-Based Adsorbents: A Review

Pokhrel

Poudel

Aryal

et al. 2019

J. Inst. Sci. Tech.

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There is a growing research interest in the development of adsorbents based on agricultural wastes (AWs) for the removal of phosphate from waste water sources, which otherwise can cause eutrophication. Nevertheless, due to the lack of active exposed surface sites, raw AWs-based adsorbents are usually inefficient for the adsorption of phosphate from aquatic environment. Consequently, modification of raw adsorbents has been frequently used to improve their phosphate adsorption capacity. Of the various methods of modification, this review paper focused on most widely used chemical modification method. It presents a critical and comprehensive review of the literature on the effectiveness of metal-loaded agricultural wastes (MLAWs)-based adsorbents in removing and recovering of phosphate from waste waters. Mechanisms and factors affecting phosphate adsorption as well as phosphate desorption and regeneration from MLAW adsorbents are critically evaluates. If phosphate from waste waters can be of economical value, regeneration may partly overcome the future shortage of global phosphate rock reserves. It is evident from the literature survey presented herein that MLAWs-based adsorbents exhibited as potential adsorbent for the removal/recovery of phosphate from waste waters. However, there still needs a refined practical utility of these adsorbents on a commercial scale, which may serve as the novel, cost effective and environmentally benign methods of modification.

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“…The parameters of the Freundlich isotherm model are listed in Table 2. Although various studies found in the literature that use iron based adsorbents to remove selenite and selenate could be described by the Langmuir isotherm model (Martinez et al, 2006;Rovira et al, 2007;Zhang et al, 2008;Dash and Parida, 2007;Namasivayam and Prathap, 2006), the Freundlich model resulted in a better fit than the Langmuir isotherm model for adsorption of both selenite and selenate species in surface coal mine environment soils (Sharmasarkar and Vance, 2002) and for adsorption of selenite on nano-magnetite (Bhojappa, 2009).…”

Section: Adsorption Isothermsmentioning

confidence: 98%

“…Recent studies have also presented nano-magnetite as a potential adsorbent for selenium species (Missana et al, 2009;Bhojappa, 2009, Lopez de Arroyabe et al, 2008).…”

Section: Adsorptionmentioning

confidence: 99%

“…On the other hand, some studies of selenite adsorption onto different adsorbents such as iron-coated granular activated carbon (Zhang et al, 2008), manganese nodule leached residues (Dash and Parida, 2007), sulphuric acid-treated peanut shell (El-Shafey, 2007a), and nano-magnetite (Bhojappa, 2009) concluded that the selenite uptake increased as temperature increased.…”

Section: Effect Of Temperature and Adsorption Thermodynamicsmentioning

confidence: 99%

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Selenium Removal by Nano-Magnetite Impregnated Diatomaceous Earth

Cardona¹

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Removal of phosphorus/selenium from aqueous solutions by adsorption processes

Cited by 3 publications

References 30 publications

A comparative study on different metal loaded soybean milk by-product ‘okara’ for biosorption of phosphorus from aqueous solution

A comparative study on different metal loaded soybean milk by-product ‘okara’ for biosorption of phosphorus from aqueous solution

Removal and Recovery of Phosphate from Water and Wastewater Using Metal-Loaded Agricultural Waste-Based Adsorbents: A Review

Selenium Removal by Nano-Magnetite Impregnated Diatomaceous Earth

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