Chia Nan University of Pharmacy & Science Institutional Repository:Item 310902800/30922
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    請使用永久網址來引用或連結此文件: https://ir.cnu.edu.tw/handle/310902800/30922


    題名: Removal of nickel by homogeneous granulation in a fluidized-bed reactor
    作者: Ballesteros, Florencio C.
    Salcedo, Angel Frances S.
    Vilando, Anabella C.
    Huang, Yao-Hui
    Lu, Ming-Chun
    貢獻者: Univ Philippines, Coll Engn, Environm Engn Grad Program
    Adamson Univ, Dept Chem Engn
    Mapua Inst Technol, Sch Chem Engn & Chem, Chem Engn Grad Programs
    Natl Cheng Kung Univ, Dept Chem Engn
    Chia Nan Univ Pharm & Sci, Dept Environm Resources Management
    關鍵詞: Nickel carbonate
    Nickel carbonate hydroxide
    Solubility
    Granulation ratio
    Hydraulic condition
    ion
    日期: 2016-12
    上傳時間: 2018-01-18 11:37:59 (UTC+8)
    出版者: Pergamon-Elsevier Science Ltd
    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 [CO32-: Ni2+], 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 similar to 50%, similar to 9-12%, and similar to 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 Ni-2(CO3)(OH)(2). (C) 2016 Elsevier Ltd. All rights reserved.
    關聯: Chemosphere, v.164, pp.59-67
    顯示於類別:[Dept. of Environmental Resources Management] Periodical Articles

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