Eco-friendly chitin-MnO2-alginate nanobiocomposite spheres for enhanced heavy metal removal from wastewater

被引：0

作者：

Njimou, Jacques Romain ^{[1
]}

Njike, Rives Mallet Tcheulo ^{[2
]}

Kepdieu, Jean Marie ^{[3
]}

Djangang, Chantale Njiomou ^{[3
]}

Talla, Andre ^{[2
]}

Elambo, Nkeng George ^{[2
]}

Fritsky, Jacob W. ^{[4
,5
]}

Maicaneanu, Sanda Andrada ^{[4
]}

Rosso, Diego ^{[6
]}

机构：

[1] Univ Ngaoundere, Sch Chem Engn & Mineral Ind, POB 454, Ngaoundere, Cameroon

[2] Natl Adv Sch Publ Works, Res Ctr, POB 510, Yaounde, Cameroon

[3] Univ Yaounde I, Dept Inorgan Chem, POB 812, Soa, Cameroon

[4] Indiana Univ Penn, Madia Deparment Chem Biochem & Phys, Pennsylvania, PA 15705 USA

[5] Arizona State Univ, Sch Mol Sci, Tempe, AZ 85287 USA

[6] Univ Calif Irvine, Dept Civil & Environm Engn, 844F Engn Tower, Irvine, CA 92697 USA

来源：

INORGANIC CHEMISTRY COMMUNICATIONS | 2025年 / 172卷

关键词：

Chitin; Manganese dioxide; Nanobiocomposite; Water treatment; Heavy metal adsorption; Environmental sustainability; ACTIVATED CARBON; CALCIUM-CARBONATE; AQUEOUS-SOLUTIONS; ADSORPTION; IONS; CHITIN; BIOSORPTION; KINETICS; THERMODYNAMICS; EQUILIBRIUM;

D O I：

10.1016/j.inoche.2024.113719

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

This study investigates a sustainable solution to heavy metal removal from water, addressing critical environmental and health concerns through the use of chitin-MnO2-alginate (Alg/CN-MnO2) nanobiocomposite spheres as high-efficiency adsorbents. Characterization techniques (SEM-EDS, XRD, FTIR) confirmed the composite's suitability for Cd(II) and Pb(II) adsorption, identifying functional groups crucial for metal binding and a predominantly negative surface charge (pHpzc= 3.6) optimal for cation adsorption. Adsorption data best aligned with the Langmuir model, showing maximum capacities of 519.2 mg/g for Cd(II) and 575.6 mg/g for Pb(II), with rapid adsorption and favorable intra-particle diffusion rates for Pb(II) over Cd(II). Column tests demonstrated removal efficiencies up to 74.2 % for Cd(II) and 84.9 % for Pb(II) at optimized flow rates, revealing the composite's robust performance in complex systems. Thermodynamic analysis indicated that the adsorption process is spontaneous and endothermic, supporting its application in real-world conditions. These findings position Alg/ CN-Mn nanobiocomposite spheres as a promising, eco-friendly solution with high potential for scalable, sustainable wastewater treatment, contributing to environmental remediation and public health protection.

引用

页数：14