Removal of nickel by homogeneous granulation in a fluidized-bed reactor

Florencio C. Ballesteros, Angel Frances S. Salcedo, Anabella C. Vilando, Yao Hui Huang, Ming Chun Lu

研究成果: Article同行評審

17 引文 斯高帕斯(Scopus)

摘要

Heavy metal removal is a significant task that protects our water resources. Fluidized-bed homogeneous granulation process (FBHGP) was used to treat nickel containing wastewaters by recovering nickel in the form of nickel carbonate hydroxide granules with low moisture content rather than soft sludge. This study investigated nickel removal and recovery through HFBGP by determining the effects of varying influent nickel concentrations, [CO32−: Ni2+] molar ratios, and pH of the precipitant. This was conducted in a continuous process using a laboratory scale fluidized-bed reactor that determined the effects driven by supersaturation. The best operating conditions that resulted in a 98.8% nickel removal and 97.8% granulation efficiency were 200 mg L−1 influent nickel concentration, 2.0 M R of [CO3−2:Ni+2], and 10.7 pH of precipitant. Based on SEM analysis, the granules formed have sizes between 0.50 mm and 0.15 mm. EDS results showed that the atomic percentages of nickel carbon, and hydrogen were ∼50%, ∼9–12%, and ∼35% respectively, representing the nickel carbonate compound. The XRD results showed the low symmetry of the granules formed that confirmed the characteristics of nullaginite mineral of Ni2(CO3)(OH)2.

原文English
頁(從 - 到)59-67
頁數9
期刊Chemosphere
164
DOIs
出版狀態Published - 2016 十二月 1

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

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