Zinc peroxide nanomaterial as an adsorbent for removal of Congo red dye from waste water.
In the past decade, various natural byproducts, advanced metal oxide composites and photocatalysts have been reported for removal of dyes from water. Although these materials are useful for select applications, they have some limitations such as use at fixed temperature, ultra violet (UV) light and the need for sophisticated experimental set up. These materials can remove dyes up to a certain extent but require long time. To overcome these limitations, a promising adsorbent zinc peroxide (ZnO2) nanomaterial has been developed for the removal of Congo red (CR) dye from contaminated water. ZnO2is highly efficient even in the absence of sunlight to remove CR from contaminated water upto the permissible limits set by the World Health Organization (WHO) and the United States- Environmental Protection Agency (US-EPA). The adsorbent has a specific property to adjust the pH of the test solution within 6.5-7.5 range irrespective of acidic or basic nature of water. The adsorption capacity of the material for CR dye was 208mgg-1within 10min at 2-10pH range. The proposed material could be useful for the industries involved in water purification. The removal of CR has been confirmed by spectroscopic and microscopic techniques. The adsorption data followed a second order kinetics and Freundlich isotherm.
CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi 110012, India; Metrology in chemistry (ALSIM), India; Academy of Scientific and Innovative Research (AcSIR), India.
Sneha
S
Chawla
CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi 110012, India; Metrology in chemistry (ALSIM), India; Academy of Scientific and Innovative Research (AcSIR), India.
Himani
H
Uppal
Amity Institute of Nanotechnology, Noida 201301, India.
Mohit
M
Yadav
Amity Institute of Nanotechnology, Noida 201301, India.
Nupur
N
Bahadur
CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi 110012, India; Metrology in chemistry (ALSIM), India; Academy of Scientific and Innovative Research (AcSIR), India. Electronic address: naharsingh@nplindia.org.
Nahar
N
Singh
D000327:Adsorption; D004396:Coloring Agents / Q000032:analysis* / Q000737:chemistry; D003224:Congo Red / Q000032:analysis* / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D049329:Nanostructures / Q000737:chemistry*; D010545:Peroxides / Q000737:chemistry*; D012996:Solutions; D013499:Surface Properties; D014481:United States; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D018508:Water Purification / Q000379:methods*; D017967:Zinc Compounds / Q000737:chemistry*
D004396:Coloring Agents; D003224:Congo Red; D010545:Peroxides; D012996:Solutions; D062065:Wastewater; D014874:Water Pollutants, Chemical; D017967:Zinc Compounds
Adsorption; Congo red dye; Isotherm; Kinetics; Zinc peroxide