Reactive Phosphorus Removal from Aquaculture and Poultry Productions Systems Using Polymeric Hydrogels

Abstract

This work reports on the features of a sorption processes for the ultimate removal and recovery of reactive phosphorus from aquaculture and poultry production wastewater effluents. The sorbent used was a cross-linked polyamine (PAA-HCl) polymeric hydrogel. The PAA-HCl hydrogels were prepared by chemically cross-linking aqueous solutions of linear PAA-HCl chains with epichlorohydrin (EPI). The phosphorus binding capacity of the gels was measured in standard aqueous solutions as a function of ionic strength. Equilibrium PO4(3-), loadings of 100 mg anion/g gel were obtained. The regeneration ability of the gels was demonstrated by release of the bound phosphorus anions upon washing with 1-2 M NaOH solution, providing opportunities to recover and reuse the gel over multiple cycles. The ionic polyamine gels have been demonstrated to be appropriate materials for treating poultry and aquaculture wastewater effluents. Upon treatment phosphorus anion concentrations were reduced to levels suitable for discharge into natural surface waters.

Adsorption of phosphate ion in aqueous solutions by calcined cobalt hydroxide at different temperatures

“…Among 21 various available technologies for phosphate decontamination, the 22 adsorption method is relatively simple, economical, and highly 23 efficient [5,6]. Various types of materials have been used as 24 adsorbents, such as Fe-Mn binary oxide [7], a metal oxide 25 adsorbent derived from manganese ore tailings [8], nanostruc- 26 tured Fe(III)-Cu(II) binary oxides [9], mesoporous Cr-Zr binary 27 oxide nanoadsorbent [10], magnetic Fe-Zr binary oxide [11], 28 aluminum compounds [12][13][14], and hydrous zirconium oxide- 29 based nanocomposites [4]. Composite metal oxides may show 30 physicochemical properties different from those of their single- 31 component oxide counterparts.…”

“…In this procedure, the adsorbent (0.05 g) was added to 78 0.01 mol/l NaF solution (50 ml) at pH 4.6; the pH was adjusted The adsorbent (0.05 g) was added to a solution (50 ml) 97 containing phosphate ion (initial concentration of 500 mg/l). [29]. The amount of phosphate ion adsorbed onto 105 the adsorbent Q1 was calculated using Eq.…”

Granulation of Cobalt-containing Nickel Hydroxide with Polyethylene Terephthalate and its Phosphate Ion Adsorption Capability

“…The concentration of phosphate ions was determined by the ascorbic acid reduction method. This procedure is equivalent to USEPA method 365.2 and the standard method 4500-P E for wastewater [38]. The amount of adsorbed phosphate ions was calculated using Eq.…”

Poly(sodium acrylate) hydrogels as potential pH-sensitive sorbents for the removal of model organic and inorganic pollutants from water

“…Thus, besides the classical activated carbon filters, different types of other materials have been proposed and developed, like organically modified synthetic porous silica (Bekiari and Lianos, 2006;Chu et al, 2008;Sayari et al, 2005), dendritic polymers (Arkas et al, 2003;Arkas et al, 2005) and hydrogels (Bekiari et al, 2008;Kofinas and Koussis, 2003). Hydrogels are three-dimensional chemically crosslinked polymer networks, able to swell in water, increasing substantially their original volume while keeping their integrity.…”

“…Hydrogels are three-dimensional chemically crosslinked polymer networks, able to swell in water, increasing substantially their original volume while keeping their integrity. These polymeric materials are promising for environmental applications, in particular, the waste water treatment (Bajpai and Johnson, 2005;Bekiari et al, 2008;Chauhan et al, 2006;Kasgoz et al, 2003;Kofinas and Koussis, 2003;Ray et al, 2007;Thivaios and Bokias, 2010). In fact, it is known that charged hydrogels are able to adsorb effectively from water oppositely charged organic and inorganic pollutants.…”