Investigation of hexavalent chromium sorption in serpentine sediments

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• 作者：Thanasis Mpouras^a ; ^{th.mpouras@gmail.com} ; Maria Chrysochoou^b ; Dimitris Dermatas^a
• 关键词：BET ; Brunauer&ndash ; Emmett&ndash ; Teller ; PZC ; point of zero charge ; SEM ; scanning electron microscopy ; SSA ; specific surface area ; WHO ; World Health Organization ; XRD ; X-ray diffraction ; XRF ; X-ray fluorescence
• 刊名：Journal of Contaminant Hydrology
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：197
• 期：Complete
• 页码：29-38
• 全文大小：1056 K
• 卷排序：197

文摘

Cr6 + removal in serpentine sediment is due to both adsorption and reduction. Reduction is mostly due to the sediment magnetic fraction (mostly magnetite). In the pH range 3–7 reduction contributed almost 50% of the total removal. Adsorption is constant in the pH range 3–7 and decreases sharply in the range 7–8.5. Sediment adsorption behavior is dominated by the extra fine fraction (d < 0.075 mm).