Removal of lead, cadmium, zinc, and copper from industrial wastewater by carbon developed from walnut, hazelnut, almond, pistachio shell, and apricot stone
Removal of lead, cadmium, zinc, and copper from industrial wastewater by carbon developed from walnut, hazelnut, almond, pistachio shell, and apricot stone
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DOI：
10.1016/j.jhazmat.2007.04.118
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发表时间：
2008-01-31
影响因子：
13.6
通讯作者：
Kermani, Hamed Reihani
中科院分区：
文献类型：
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作者：
Kazemipour, Maryam;Ansari, Mehdi;Kermani, Hamed Reihani
在这项工作中，吸附铜（Cu），锌（Zn），铅（Pb），镉（Cd）的工业废水中存在的核桃，榛子，开心果，杏仁，杏仁核坚果壳生产的碳进行了研究。所有使用的农业贝壳或石头都被磨碎，过筛到规定的尺寸范围，并在烤箱中烘烤。加热时间和温度分别为15 min和800 ℃，以达到最大的去除效率。去除效率进行了优化的初始pH值，流速，和吸附剂的剂量。最大去除发生在pH 6-10，流速为3 mL/min，和0.1 g的吸附剂。碳源通过后，其去除阳离子的能力将大大降低。结果表明，所研究的阳离子可以被碳源去除。研究了活性炭对真实的铜工业废水中阳离子的去除效果。结果表明，上述碳源不仅能有效地去除这些阳离子，而且在真实的样品中去除率更高。这些结果与标准混合物合成废水的结果一致。(c)2007 Elsevier B. V.保留所有权利。
In this work, adsorption of copper (Cu), zinc (Zn), lead (Pb), and cadmium (Cd) that exist in industrial wastewater onto the carbon produced from nutshells of walnut, hazelnut, pistachio, almond, and apricot stone has been investigated. All the agricultural shell or stone used were ground, sieved to a defined size range, and carbonized in an oven. Time and temperature of heating were optimized at 15 min and 800 degrees C, respectively, to reach maximum removal efficiency. Removal efficiency was optimized regarding to the initial pH, flow rate, and dose of adsorbent. The maximum removal occurred at pH 6-10, flow rate of 3 mL/min, and 0.1 g of the adsorbent. Capacity of carbon sources for removing cations will be considerably decreased in the following times of passing through them. Results showed that the cations studied significantly can be removed by the carbon sources. Efficiency of carbon to remove the cations from real wastewater produced by copper industries was also studied. Finding showed that not only these cations can be removed considerably by the carbon sources noted above, but also removing efficiency are much more in the real samples. These results were in adoption to those obtained by standard mixture synthetic wastewater. (c) 2007 Elsevier B.V. All rights reserved.