Activated carbons developed from surplus sewage sludge for the removal of dyes from dilute aqueous solutions
Activated carbons developed from surplus sewage sludge for the removal of dyes from dilute aqueous solutions
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DOI：
10.1016/s1385-8947(03)00054-8
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发表时间：
2003-08-15
影响因子：
15.1
通讯作者：
Rigola, M
中科院分区：
文献类型：
--
作者：
Martin, MJ;Artola, A;Rigola, M
对污水处理厂的剩余生物污泥在H2SO4存在下，在700℃的温度下进行热解。污泥基活性炭（SB）以介孔为主，比表面积为253 m(2)/g，平均孔径为2.3 mm。Chemviron GW主要为微孔，比表面积为1026 m(2)/g，平均直径为1.8 nm。sbac对溶液中三种阴离子染料（CI酸棕283、CI直红89和CI直黑168）的去除率均优于市售产品。Chemviron GW对碱性红46的吸附性能最好，这可能与染料分子的空间尺寸相对于微孔的大小相对较小有关，也与商用AC的表面积较大有关。当平衡pH值在5到9之间时，由于存在可电离的表面官能团，SB AC对染料的吸附能力显著改变，而具有更疏水表面的Chemviron GW的吸附能力保持不变。(C) 2003 Elsevier Science B.V.版权所有
Surplus biological sludge from wastewater treatment plants was pyrolysed at 700degreesC in the presence of H2SO4. Sludge-based (SB) activated carbon (AC) was mainly mesoporous in nature, with a surface area of 253 m(2)/g and an average pore diameter of 2.3 mm. Chemviron GW, an AC commercial reference, was mainly microporous with a surface area of 1026 m(2)/g and an average diameter of 1.8 nm. SB AC outperformed the commercial product in the removal of three anionic dyes in solution (CI Acid Brown 283, CI Direct Red 89 and CI Direct Black 168). Chemviron GW performed best for Basic Red 46, which may be related to the relatively small steric size of the dye molecules compared with the size of micropores, and to the greater surface area of the commercial AC. For equilibrium pH values between 5 and 9, the adsorption capacity of SB AC for dyes was significantly modified due to the presence of ionisable surface functional groups while that of Chemviron GW, with a more hydrophobic surface, remained unaltered. (C) 2003 Elsevier Science B.V. All rights reserved.