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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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Struvite (MgNH<sub>4</sub>PO<sub>4</sub> ⋅ 6H<sub>2</sub>O) and hydroxyapatite (HAP, Ca<sub>10</sub>(PO<sub>4</sub>)<sub>6</sub>(OH)<sub>2</sub>) precipitation in urine-separating toilets (NoMix toilets) causes severe maintenance problems and also reduce the phosphate and calcium content. Application of urine separating technique and extraction of by-products from human urine is a cost effective technique in waste water treatment. In this study, we extract urine calcite from human urine by batch scale method, using urease producing microbes to trigger the precipitation and calcite formation process. Extracted urine calcite (calcining at 800℃) is a potential adsorbent for removal of heavy metal(loid)s like (Cd<sup>2+</sup>, Cu<sup>2+</sup>, Ni<sup>2+</sup>, Pb<sup>2+</sup>, Zn<sup>2+</sup> and As<sup>3+</sup>) along with additional leaching analysis of total nitrogen (T-N), phosphate (T-P) and chemical oxygen demand (COD). The transformations of calcite during synthesis were confirm by characterization using XRD, SEM-EDAX and FT-IR techniques. In additional, the phosphate leaching potential and adsorbate (nitrate) efficiency in aqueous solution was investigated using the calcinedurine calcite. The results indicate that the calcite was effectively remove heavy metal(loid)s lead up to 96.8%. In addition, the adsorption capacity (q<sub>e</sub>) of calcite was calculated and it was found to be 203.64 Pb, 110.96 Cd, 96.02 Zn, 104.2 As, 149.54 Cu and 162.68 Ni mg/g, respectively. Hence, we suggest that the calcite obtain from the human urine will be a suitable absorbent for heavy metal(loid)s removal from aqueous solution.
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참고문헌 (43)
참고문헌 신청
Alexandratos, V.G. / 2007 / Arsenate uptake by calcite: macroscopic and spectroscopic characterization of adsorption and incorporation mechanisms / Geochim. Cos. Ac 71(17):4172~4187
Alidoust, D. / 2015 / Mechanism of cadmium biosorption from aqueous solutions using calcined oyster shells / J. Environ. Manage 150:103~110
Andrews, R.K. / 1984 / Urea and urease / Adv. Inorg. Biochem 6:245
Ao, W. / 2006 / Mechanochemical synthesis of zinc oxide nanocrystalline / Powd. Tech 168(3):148~151
Argun, M.E. / 2008 / A new approach to modification of natural adsorbent for heavy metal adsorption / Bioresour. Technol 99(7):2516~2527
Alidoust, D. / 2015 / Mechanism of cadmium biosorption from aqueous solutions using calcined oyster shells / J. Environ. Manage 150:103~110
Andrews, R.K. / 1984 / Urea and urease / Adv. Inorg. Biochem 6:245
Ao, W. / 2006 / Mechanochemical synthesis of zinc oxide nanocrystalline / Powd. Tech 168(3):148~151
Argun, M.E. / 2008 / A new approach to modification of natural adsorbent for heavy metal adsorption / Bioresour. Technol 99(7):2516~2527
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