Recovery of nickel ions from wastewater by precipitation approach using silica xerogel
Publication in refereed journal

香港中文大學研究人員

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摘要A facile route was developed to recover nickel ions from a synthetic wastewater. It involved the use of silica xerogel containing amine in the nickel sulphate solution resulting in the formation of a greenish precipitate. It was found that this precipitate was mostly amorphous Ni(OH)2 spherical aggregate composed of nanosheets. The pH level of the solution was monitored, and it was maintained in the range of 10–10.5 due to the steady release of amine from the xerogel into the waste solution. The prepared silica xerogel would provide a stable environment for the chemical precipitation of metal ions in wastewater during the whole precipitation process. The silica xerogel was collected and reused for two more cycles of recovery. The nickel removal efficiencies (99.34˜99.65%) kept unchanged and higher than those reported earlier. The collected precipitate that contained nickel hydroxide with some residual silica could be utilized as glass colorant.
著者Wang RL, Ng DHL, Liu SQ
期刊名稱Journal of Hazardous Materials
出版年份2019
月份12
卷號380
出版社ELSEVIER
文章號碼120826
國際標準期刊號0304-3894
電子國際標準期刊號1873-3336
語言英式英語
關鍵詞Nickel ion, Precipitation, Silica xerogel, Metal ion recovery
Web of Science 學科類別Engineering, Environmental;Environmental Sciences;Engineering;Environmental Sciences & Ecology

上次更新時間 2021-21-01 於 00:29