Ferrite materials prepared from two industrial wastes: Electroplating sludge and spent pickle liquor
Ferrite materials prepared from two industrial wastes: Electroplating sludge and spent pickle liquor
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由两种工业废物制备的铁氧体材料：电镀污泥和酸洗废液
DOI：
10.1016/j.seppur.2010.07.009
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发表时间：
2010-10-13
影响因子：
8.6
通讯作者：
Xu, Zhi Ping
中科院分区：
文献类型：
--
作者：
Chen, Dan;Hou, Jun;Xu, Zhi Ping
采用水热法同时处理电镀污泥和酸洗废液，制备高结晶度、高饱和磁化强度的尖晶石铁氧体。电镀污泥经水热处理后，只能生成结晶较差、杂质含量较高的铁氧体。然而，以合适的混合比对电镀污泥和废酸洗液进行共水热处理导致结晶良好的铁氧体产物，其中所有重金属被固定到铁氧体晶格中。为了使铁氧体产品具有最大的饱和磁化强度（在本研究中为41.42 emu g（-1）），采用响应面法（RSM）得到了最佳实验条件，即在300 ℃下水热处理6 h，初始pH调节至10。将此最佳实验条件应用于不同类型的电镀污泥，进一步证明了其有效性。此外，通过酸洗去除杂质方解石，可使铁氧体产品的磁化强度进一步提高到58.34emu g（-1）。该研究为将两种常见的工业废料转化为有价值的铁氧体材料提供了一条有效途径。(C)2010 Elsevier B. V.保留所有权利。
Simultaneous treatment of two industrial wastes, i.e. the electroplating sludge and the spent pickling liquor, to produce valuable spinel ferrite with high crystallinity and high saturation magnetization through the hydrothermal process has been investigated. After the hydrothermal treatment, the electroplating sludge can only produce poorly crystallized ferrite with high content of impurities. However, co-hydrothermal treatment of the electroplating sludge and the spent pickle liquor in a suitable mixing ratio results in a well crystallized ferrite product, with all heavy metals being fixed into the ferrite lattice. In order for the ferrite product to have a maximum saturation magnetization (41.42 emu g(-1) in this research), the response surface methodology (RSM) has been employed to derive the optimal experiment condition, e.g. hydrothermal treatment at 300 degrees C for 6 h with the initial pH adjusted to 10. This optimal experimental condition has been further proven valid when applied to a different kind of electroplating sludge. In addition, the magnetization of ferrite products can be further enhanced to 58.34 emu g(-1) by acid washing to remove the impurity (calcite). This research thus shows an effective way to transfer two common industrial wastes into valuable ferrite materials. (C) 2010 Elsevier B.V. All rights reserved.