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Global Journal of Environmental Science and Technology 2012, 2: 11
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Research Article
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A review on boron adsorption using various adsorbents
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Hui Jiun Chieng, Mei Fong Chong
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Faculty of Engineering, The University of Nottingham Malaysia Campus, Jalan Broga,
43500 Semenyih, Selangor, Malaysia
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Abstract |
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Boron is widely used in the form of borates and boric acid in various industries. However, due to its toxicity to plants and animals, discharge of boron containing waste to the environment must be controlled at safe and sustainable level. In order to remove boron from the water to a desirable level to meet the requirement set by the legislation, there are many treatment technologies developed. Among the technologies, adsorption is the commonly chosen process for boron removal because it is comparatively effective, economical and is easily applied. However, this also depends on the choice of adsorbents. As such, selection of adsorbents is critical for an effective and low cost boron removal process. Various adsorbents for boron removal including activated carbon, ash, resin, metal oxides, clay materials and composite magnetic particles were discussed in this paper. Their merits and limitations were highlighted and recommendations for boron removal enhancement were also suggested. Besides, comparisons were made between these adsorbents in order to identify the potential effective adsorbents for boron removal. The comparison demonstrates that Mg-Al layered double hydroxides (LDHs) has high boron adsorption capacities while composite magnetic compound is also a promising boron removal technology as it is a simple process and the compounds are easily available. However, before implementing these technologies into industry scale treatment, it is recommended to develop the technologies into pilot-scale treatment in order to validate the boron removal performance. The capital and operating costs of the system were also need to be considered.
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Keywords |
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Boron; Adsorption; Adsorbent; Removal; Impregnate
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