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

被引：43

作者：

Ballesteros, Florencio C. ^{[1
]}

Salcedo, Angel Frances S. ^{[1
]}

Vilando, Anabella C. ^{[2
,3
]}

Huang, Yao-Hui ^{[4
]}

Lu, Ming-Chun ^{[5
]}

机构：

[1] Univ Philippines, Coll Engn, Environm Engn Grad Program, Quezon City, Philippines

[2] Adamson Univ, Dept Chem Engn, Manila, Philippines

[3] Mapua Inst Technol, Sch Chem Engn & Chem, Chem Engn Grad Programs, Manila, Philippines

[4] Natl Cheng Kung Univ, Dept Chem Engn, Tainan, Taiwan

[5] Chia Nan Univ Pharm & Sci, Dept Environm Resources Management, Tainan, Taiwan

来源：

CHEMOSPHERE | 2016年 / 164卷

关键词：

Nickel carbonate; Nickel carbonate hydroxide; Solubility; Granulation ratio; Hydraulic condition; HEAVY-METAL REMOVAL; WASTE-WATER; AQUEOUS-SOLUTION; CRYSTALLIZATION PROCESS; FENTON PROCESS; CARBONATE; RECOVERY; PRECIPITATION; HYDROXIDE; ION;

D O I：

10.1016/j.chemosphere.2016.08.081

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

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.

引用

页码：59 / 67

页数：9

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