TY - JOUR
T1 - Efficient and highly selective adsorption of cationic dyes and removal of ciprofloxacin antibiotic by surface modified nickel sulfide nanomaterials
T2 - Kinetics, isotherm and adsorption mechanism
AU - Kumari, Sunita
AU - Khan, Afaq Ahmad
AU - Chowdhury, Arif
AU - Bhakta, Arvind Kumar
AU - Mekhalif, Zineb
AU - Hussain, Sahid
N1 - Funding Information:
The authors S. Kumari and A. A. Khan thank UGC for the research fellowship. The author A. Chowdhury is thankful to the Indian Institute of Technology Patna for a research fellowship and author A. K. Bhakta is thankful to the University of Namur for a CERUNA doctoral fellowship. We highly appreciate the research support from the Indian Institute of Technology Patna.
Funding Information:
The authors S. Kumari and A. A. Khan thank UGC for the research fellowship. The author A. Chowdhury is thankful to the Indian Institute of Technology Patna for a research fellowship and author A. K. Bhakta is thankful to the University of Namur for a CERUNA doctoral fellowship. We highly appreciate the research support from the Indian Institute of Technology Patna.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/2/5
Y1 - 2020/2/5
N2 - In the present work, the nickel sulfide nanomaterial with the negative surface charge was synthesized by a simple and eco-friendly route using nickel acetate, thioacetamide and l-glutathione reduced (GSH). The new surface-modified nanomaterial was systematically characterized using various techniques such as XRD, FE-SEM, TEM, EDX, XPS, TGA, Zeta-potential, and FT-IR, and then applied for the removal of dyes and antibiotics. The nanomaterial exhibited selective adsorption towards cationic dyes: methylene blue (MB) and crystal violet (CV) with a high adsorption capacity of 1006.52 mg g−1 and 1946.61 mg g−1, respectively. The adsorption capacity for the removal of ciprofloxacin antibiotic (CIP) was 971.83 mg g−1 which is extremely high. The selectivity of MB in binary mixtures was investigated using two anionic dyes: methyl orange (MO) and orange G (OG). The separation efficiency (α) for MB in MB/MO and MB/OG mixtures was 97.75 % and 99.16 %, respectively. The adsorption process for all the adsorbates followed pseudo-second-order kinetics and the Freundlich isotherm model. The mechanism of interaction was analyzed through pH effect, zeta-potential measurement, FT-IR and XPS analysis, implying that the electrostatic interaction is mainly involved in the adsorption. In addition, the parameters like the effect of initial dye concentration and temperature on the adsorption process were studied. The adsorbent is reusable up to 4 times with 97 % efficiency. Thus, the prepared GSH-capped nanomaterial is an effective adsorbent for the removal of antibiotics and the selective removal of cationic dyes with high adsorption capacity.
AB - In the present work, the nickel sulfide nanomaterial with the negative surface charge was synthesized by a simple and eco-friendly route using nickel acetate, thioacetamide and l-glutathione reduced (GSH). The new surface-modified nanomaterial was systematically characterized using various techniques such as XRD, FE-SEM, TEM, EDX, XPS, TGA, Zeta-potential, and FT-IR, and then applied for the removal of dyes and antibiotics. The nanomaterial exhibited selective adsorption towards cationic dyes: methylene blue (MB) and crystal violet (CV) with a high adsorption capacity of 1006.52 mg g−1 and 1946.61 mg g−1, respectively. The adsorption capacity for the removal of ciprofloxacin antibiotic (CIP) was 971.83 mg g−1 which is extremely high. The selectivity of MB in binary mixtures was investigated using two anionic dyes: methyl orange (MO) and orange G (OG). The separation efficiency (α) for MB in MB/MO and MB/OG mixtures was 97.75 % and 99.16 %, respectively. The adsorption process for all the adsorbates followed pseudo-second-order kinetics and the Freundlich isotherm model. The mechanism of interaction was analyzed through pH effect, zeta-potential measurement, FT-IR and XPS analysis, implying that the electrostatic interaction is mainly involved in the adsorption. In addition, the parameters like the effect of initial dye concentration and temperature on the adsorption process were studied. The adsorbent is reusable up to 4 times with 97 % efficiency. Thus, the prepared GSH-capped nanomaterial is an effective adsorbent for the removal of antibiotics and the selective removal of cationic dyes with high adsorption capacity.
KW - Nickel sulfide; Adsorption; Dyes; Ciprofloxacin; Isotherms; Kinetics
KW - Dyes
KW - Adsorption
KW - Isotherms
KW - Nickel sulfide
KW - Kinetics
KW - Ciprofloxacin
UR - http://www.scopus.com/inward/record.url?scp=85076544416&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2019.124264
DO - 10.1016/j.colsurfa.2019.124264
M3 - Article
SN - 0927-7757
VL - 586
JO - Colloids and surfaces. A: Physicochemical and engineering aspects
JF - Colloids and surfaces. A: Physicochemical and engineering aspects
M1 - 124264
ER -