Removal and recovery of phosphate using a novel calcium silicate hydrate composite starch cryogel

Continuous Phosphate Removal and Recovery Using a Calcium Silicate Hydrate Composite Monolithic Cryogel Column

“…Phosphate (soluble reactive phosphorus) is a critical nutrient for the growth of phytoplankton and algae [ 2 , 3 , 4 , 5 ]. At concentrations between 0.025 and 0.03 mg L −1 [ 6 ] or higher than 0.02 mg L −1 [ 7 , 8 ], phosphate induces the eutrophication of water bodies, resulting in the deterioration of water quality [ 9 , 10 ]. Thus, controlling the phosphate concentration in effluents prior to their discharge into water bodies is imperative for reducing pollution.…”

“…Recently, calcium silicate hydrate (CSH) has emerged as an adsorptive material exhibiting great potential for phosphate removal with respect to other adsorbents [ 1 , 2 , 10 , 32 , 33 , 34 , 35 ]. In addition, CSH can be employed for phosphate recovery in biological wastewater treatment as it serves as a calcium ion donor, seed crystal, and pH regulator simultaneously [ 35 , 36 , 37 ].…”

Fly ash derived calcium silicate hydrate as a highly efficient and fast adsorbent for Cu(ii) ions: role of copolymer functionalization

“…12 So far a variety of calcium silicate hydrate and calcium silicate hydrate based-composite materials have been reported, such as ultra-thin calcium silicate hydrate nanosheets, magnetic based composite, doped calcium silicate hydrate materials, etc., which has been investigated as adsorbents not only for metal ions, but also for drugs, phosphorus, proteins, etc. [11][12][13][14][15][16] Co-precipitation is a simple method to fabricate calcium silicate hydrate, with calcium salt or calcium hydroxide as calcium source and sodium silicate or tetraethyl orthosilicate as silicon source. The cost of silicon source accounts for a large part of the material cost.…”

“…Moreover, the potential of modied calcium silicate hydrate in the eld of membrane was also explored. In previous studies, [11][12][13][14][15][16] most of calcium silicate hydrates achieved strong adsorption performance in the state of dispersed powder, suffering from the difficulty of recovery and the potential threat of secondary pollution. It can be solved by assembling adsorbent to porous membrane, with the advantages of fast adsorption rate, easy recovery and industrial amplication.…”

“…, which has been investigated as adsorbents not only for metal ions, but also for drugs, phosphorus, proteins, etc. 11–16…”