Boron removal from aqueous solutions by activated carbon impregnated with salicylic acid

Çelik, Zeynep; Can, Berrin Zeliha; Kocakerìm, M. Muhtar

doi:10.1016/j.jhazmat.2007.06.120

Cited by 64 publications

(29 citation statements)

References 21 publications

(20 reference statements)

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“…Activated carbon [10], oxides [11][12][13], and other low-cost materials such as fly ash [14], red mud [15] and clays [16] have been used as boron adsorbents. Adsorption process can remove boron to the safe concentration and the treatment is cost-effective.…”

Section: Introductionmentioning

confidence: 99%

Boron removal from aqueous solution by direct contact membrane distillation

Hou

Wang

Sun

et al. 2010

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Boron removal from aqueous solution by direct contact membrane distillation

Hou

Wang

Sun

et al. 2010

Journal of Hazardous Materials

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“…These technologies generally have certain limitations, especially for boron removal from saline water. Adsorption process can remove boron to a safe concentration and the treatment is cost-effective [11]. However, the boron removal efficiency is greatly affected by temperature, pH and properties of adsorbent [12].…”

Section: Introductionmentioning

confidence: 99%

Boron removal and desalination from seawater by PVDF flat-sheet membrane through direct contact membrane distillation

et al. 2013

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• PVDF flat-sheet membrane was prepared for boron removal and desalination.• The membrane had a narrow pore size distribution and exhibited good hydrophobicity.• Simultaneous boron removal and desalination from real seawater was carried out.• The influence of antiscalant on boron removal and desalination was investigated.• The prepared membrane was efficient for boron removal and desalination by DCMD. a b s t r a c t a r t i c l e i n f o Boron removal and desalination from seawater by direct contact membrane distillation (DCMD) was studied with self-prepared polyvinylidene fluoride (PVDF) flat-sheet membrane. The membrane had an ultra-thin top skin and a porous network sponge-like layer and its effective pores showed a narrow distribution with a mean pore size of 0.22 μm. The membrane exhibited good hydrophobicity and its contact angle was about 82.6 ± 0.7°. During DCMD test of 35 g/L sodium chloride solution, the maximum permeate flux can achieve 47.6 kg/m 2 h.The natural seawater containing 4.65 mg/L boron was treated by DCMD for simultaneous boron removal and desalination. Although the permeate flux decreased with concentration factor (CF) value increase, the permeate boron kept below 20 μg/L and salt rejection was over 99.9%. When the CF value exceeded 4.0, there would be scale deposits formed, and the permeate quality and flux declined rapidly. The antiscalant polyacrylic acid could delay the deposit formation and the advisable dosage was 10 mg/L. The membrane showed satisfying performance stability in a 300 h continuous DCMD experiment even with the CF value as high as 7.0, indicating that the selfprepared membrane and DCMD process could be efficiently used for boron removal and desalination from seawater.

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“…However, the ion exchange and reverse osmosis processes are costly. Removal of boron from aqueous solutions by activated carbon [11] and batch adsorption on calcined alunite, clinoptilolite or cerium oxide were reported [12][13][14], but their boron adsorption percentage was 50-70%. Boron removal method by the generation of HAp by hydrothermal and microwave techniques for synthetic waste water have also been reported.…”

Section: Introductionmentioning

confidence: 99%