Chemical modification of sodium alginate with thiosemicarbazide for the removal of Pb(II) and Cd(II) from aqueous solutions

被引：29

作者：

Cordova, Bryan M. ^{[1
]}

Jacinto, Christian R. ^{[2
]}

Alarcon, Hugo ^{[2
]}

Mejia, Ily M. ^{[2
]}

Lopez, Rosario C. ^{[2
]}

Silva, Denise de Oliveira ^{[3
]}

Cavalheiro, Eder ^{[4
]}

Venancio, Tiago ^{[5
]}

Davalos, Juan Z. ^{[6
]}

Valderrama, A. C. ^{[1
]}

机构：

[1] Univ Nacl Ingn, Lab Invest Biopolimeros & Metalofarmacos, Fac Ciencias, Escuela Quim, Av Tupac Amaru 210, Lima 25, Peru

[2] Univ Nacl Ingn, Lab Invest Anal Instrumental & Medio Ambiente, Fac Ciencias, Escuela Quim, Av Tupac Amaru 210, Lima 25, Peru

[3] Univ Sao Paulo, Inst Chem, Dept Fundamental Chem, Lab Synthet & Struct Inorgan Chem Bioinorgan & Me, Av Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP, Brazil

[4] Univ Sao Paulo, IQSC, LATEQS, Av Trabaihadores Sao Carlense 400, BR-13567970 Sao Carlos, SP, Brazil

[5] Univ Fed Sao Carlos, Dept Quim, Lab Ressonancia Magnat Nucl, CP 676, BR-13565905 Sao Carlos, SP, Brazil

[6] CSIC, Inst Quim Fis Rocasolano, Serrano 119, Madrid 28006, Spain

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2018年 / 120卷

关键词：

Alginate; Thiosemicarbazide; Chemical modification; Pb(II); Cd(II); ACTIVATED CARBON; WASTE-WATER; GEL BEADS; CALCIUM ALGINATE; LEAD II; ADSORPTION BEHAVIOR; EFFICIENT REMOVAL; METAL IONS; CHITOSAN; COMPOSITE;

D O I：

10.1016/j.ijbiomac.2018.08.095

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

A new material (Alg(ox)-TSC), based on alginate (Alg) chemically modified with thiosemicarbazide (TSC), has been synthesized and tested as an effective biomaterial to remove Pb(II) and Cd(II) ions in aqueous solutions. The synthesis was carried out by controlling the following steps, i/partial oxidation process of alginate in NalO(4) to obtain AlgOx, ii/reacting of AlgOx, at 40-45 degrees C, with TSC in NaBH4. Algo(x)-TSC has been characterized by Field Emission Scanning Electron Microscopy (FESEM/EDS), Fourier Transform Infrared Spectroscopy (ATR-IR), solid state C-13 NMR spectroscopy and Point of Zero Charge (pH(PZC)) measuremenmts. In order to enhance the sorption process, the effect of contact time, sorbent dosage, initial concentration and reusability of the novel sorbent were investigated becoming the Alg(ox)-TSC a promising material capable of removing high concentrations of heavy metal ions such as Pb(II) (up to 950 mg/g at pH 3) and Cd(II) (up to 300 mg/g at pH 7) in aqueous solutions. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：2259 / 2270

页数：12

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