Abstract：
:This work reports the feasibility of utilizing sulfonated polystyrene nanospheres (SPS NSs) to extract heavy metals from collagen solutions. We have endeavored to present a detailed study on the adsorption characteristics and mechanism of heavy metals including Pb2+, Mn2+, Cr3+ and Cd2+. The adsorption isotherms were fitted by the Langmuir and Freundlich models while the adsorption kinetics data were described by the pseudo-first-order, pseudo-second-order and intraparticle diffusion equations. The adsorption isotherms were better fitted by the Langmuir model, leading to theoretical maximum capacities of 50.7, 15.0, 8.7 and 39.0 mg g-1 for the adsorption of Pb2+, Mn2+, Cr3+ and Cd2+, respectively. Isothermal titration calorimetry (ITC) measurements were conducted to detect the heat exchange of the adsorption processes. As a proof of concept, SPS NSs were practically applied in sequestrating heavy metals from Talapia-fish-scale derived collagen. The effects of pH of the collagen solutions in the removal of metals were investigated. By a single treatment, the concentrations of the metal ions were decreased to the regulatory standards whilst the concentration of collagen proteins was well maintained.
journal_name
Food Chemjournal_title
Food chemistryauthors
Peng Y,Shen Y,Ge M,Pan Z,Chen W,Gong Bdoi
10.1016/j.foodchem.2018.09.111subject
Has Abstractpub_date
2019-03-01 00:00:00pages
377-384eissn
0308-8146issn
1873-7072pii
S0308-8146(18)31680-7journal_volume
275pub_type
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