Removal of basic (Methylene Blue) and acid (Egacid Orange) dyes from waters by sorption on chemically treated wood shavings
Removal of basic (Methylene Blue) and acid (Egacid Orange) dyes from waters by sorption on chemically treated wood shavings
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DOI：
10.1016/j.biortech.2008.06.069
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发表时间：
2009-02-01
影响因子：
11.4
通讯作者：
Rejnek, Jaroslav
中科院分区：
文献类型：
--
作者：
Janos, Pavel;Coskun, Sezen;Rejnek, Jaroslav
云杉刨花用于吸附去除沃茨中的碱性和酸性染料。用HCl、Na_2CO_3和Na_2 HPO_4对吸附剂进行改性，用碱性碳酸盐溶液和磷酸盐溶液处理木材吸附剂，可提高其对碱性染料亚甲基蓝的吸附能力，而用无机酸处理则使其对亚甲基蓝的吸附能力有所降低。酸性染料Egacid橙子的吸附情况正好相反。根据Langmuir-Freundlich等温线估计的最大吸附容量范围为0.060至0.165 mmol g（-1）的亚甲基蓝，从0.045至0.513 mmol g（-1）的Egacid橙子。碱性染料的吸附降低，在低pH值，按照预先假定的离子交换机制的吸附。酸性染料的吸附，另一方面，随着pH值的增加而下降。无机盐以及表面活性剂的存在下，染料吸附只表现出轻微的影响。(c)2008爱思唯尔有限公司版权所有。
Spruce wood shavings from Picea abies were used for an adsorptive removal of both basic as well as acid dyes from waters. The sorption properties of the sorbents were modified with HCl, Na2CO3 and Na2HPO4, The treatment of the wood sorbents with alkaline carbonate solution as well as with phosphate solution increased the sorption ability for the basic dye (Methylene Blue), whereas the treatment with mineral acid decreased the sorption ability for Methylene Blue to some extent. The opposite is true for the sorption of the acid dye - Egacid Orange. The maximum sorption capacities estimated from the Langmuir-Freundlich isotherms ranged from 0.060 to 0.165 mmol g(-1) for Methylene Blue, and from 0.045 to 0.513 mmol g(-1) for Egacid Orange. The basic dye sorption decreased at low pH values in accordance with a presupposed ion-exchange mechanism of the sorption. The sorption of acid dye, on the other hand, decreased with increasing pH. The presence of inorganic salts as well as surfactants exhibited only minor effects on the dye sorption. (c) 2008 Elsevier Ltd. All rights reserved.