Synthesis of NiAl- layered double hydroxide with nitrate intercalation: Application in cyanide removal from steel industry effluent
| Autor: | Shanmuk Srinivas Ravuru, Sirshendu De, Animesh Jana |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
021110 strategic
defence & security studies Environmental Engineering Materials science Ion exchange Health Toxicology and Mutagenesis Cyanide Intercalation (chemistry) 0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences 01 natural sciences Pollution Field emission microscopy chemistry.chemical_compound Adsorption chemistry Specific surface area Environmental Chemistry Hydroxide Fourier transform infrared spectroscopy Waste Management and Disposal 0105 earth and related environmental sciences Nuclear chemistry |
| Zdroj: | Journal of Hazardous Materials. 373:791-800 |
| ISSN: | 0304-3894 |
| Popis: | Cyanide contamination in steel plant wastewater is a challenge. Nitrate intercalated nickel aluminum layered double hydroxide (LDH) is specially designed and synthesized for adsorption of cyanide from wastewater. The LDH was characterized by Field emission scanning electron microscope (FESEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and BET surface analyzer. Formation of nanosized plate like LDH particles was confirmed by FESEM analysis. FTIR analysis confirmed the intercalation of nitrate ions in the interlayer space of nickel-aluminum layered double hydroxide. Adsorption of cyanide in the LDH matrix was identified by FTIR study. Ion exchange was the prevalent mechanism of cyanide adsorption. The specific surface area of LDH was 142 m2/g with average pore size of 1.9 nm. The spent LDH could be regenerated using a chemical method and was reused up to five cycles. The efficiency of the LDH was evaluated using real life cyanide containing wastewater from steel plant. |
| Databáze: | OpenAIRE |
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