Macromolecular humic acid modified nano-hydroxyapatite for simultaneous removal of Cu(II) and methylene blue from aqueous solution: Experimental design and adsorption study

Wei，Wei1,2,4; Han，Xuan1,2; Zhang，Mengjia1,2; Zhang，Yong1,3; Zheng，Chunmiao4,5

2020-05-01

10.1016/j.ijbiomac.2020.02.137

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES   影响因子和分区

0141-8130

1879-0003

Humic acid (HA) is well-known for its chelating activity towards various contaminants, but it dissolves in water thus cannot be used alone as an adsorbent. By immobilizing HA to the surface of nano-hydroxyapatite (nHAP), a novel HA-nHAP adsorbent was prepared. The composition and surface morphology of the obtained HA-nHAP composite were studied in detail. Adsorptive removal of Cu(II) and Methylene blue (MB) using HA-nHAP in single and binary systems were investigated. Results indicated that HA-nHAP exhibited efficient removal of Cu(II) and MB with a favorable adsorption at higher pH. The mechanisms involved in adsorption of Cu(II) and MB were electrostatic interaction and surface complexation. Optimization study using central composite design (CCD) based response surface methodology (RSM) was performed and 3-D response surfaces were plotted from the mathematical model. The optimum conditions were found to be 2.2 g/L (adsorbent dosage), 8 h (contact time), 25 mg/L (initial Cu(II) concentration), and 85 mg/L (initial MB concentration). At optimum conditions, removal rates of Cu(II) and MB were 97.68% and 100%, respectively. The adsorption kinetics and equilibrium fitted well with Elovich and Langmuir models, respectively. Desorption studies confirmed that HA-nHAP adsorbent could be effectively regenerated and reused.

Nano-hydroxyapatite composite Response surface methodology Water purification

SCI

英语

其他

PAPD - Priority Academic Program Development of Jiangsu Higher Education Institutions[164320H101]

Biochemistry & Molecular Biology ; Chemistry ; Polymer Science

Biochemistry & Molecular Biology ; Chemistry, Applied ; Polymer Science

WOS:000525869500084

ELSEVIER

BIOLOGY & BIOCHEMISTRY

2-s2.0-85081109992

Scopus

1.Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control,Jiangsu Engineering Laboratory of Water and Soil Eco-remediation,School of Environment,Nanjing Normal University,Nanjing,210023,China
2.Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application,Nanjing,210023,China
3.Department of Geological Sciences,University of Alabama,Tuscaloosa,35487,United States
4.Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,Shenzhen,518055,China
5.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Wei，Wei,Han，Xuan,Zhang，Mengjia,et al. Macromolecular humic acid modified nano-hydroxyapatite for simultaneous removal of Cu(II) and methylene blue from aqueous solution: Experimental design and adsorption study[J]. INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES,2020,150:849-860.

Wei，Wei,Han，Xuan,Zhang，Mengjia,Zhang，Yong,&Zheng，Chunmiao.(2020).Macromolecular humic acid modified nano-hydroxyapatite for simultaneous removal of Cu(II) and methylene blue from aqueous solution: Experimental design and adsorption study.INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES,150,849-860.

Wei，Wei,et al."Macromolecular humic acid modified nano-hydroxyapatite for simultaneous removal of Cu(II) and methylene blue from aqueous solution: Experimental design and adsorption study".INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES 150(2020):849-860.