英语翻译This study deals with the adsorption of Cr(VI) from synthetic and industrial wastewater,produced by a sewage plant.The activated carbons wereprepared from a lignocellulosic raw material by thermal treatment at 450 and 650 ◦C in the

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英语翻译
This study deals with the adsorption of Cr(VI) from synthetic and industrial wastewater,produced by a sewage plant.The activated carbons were
prepared from a lignocellulosic raw material by thermal treatment at 450 and 650 ◦
C in the presence of acid (AlCl3,HCl,H3PO4 and H2SO4) and
base (NaOH) agents.To optimize the adsorption of Cr(VI),the chemical modifications caused by each activating agent (related to the capability
of Cr(VI) removal),and the optimal experimental conditions of the pH,Cr(VI) concentration,adsorbent dose and residence time,were studied.
Thus,treatment with H3PO4 gives rise to carbons with a high surface area and high efficiency for Cr(VI) removal at short equilibrium times.In
contrast,the generation of active surface sites by means of NaOH requires longer equilibrium times,the adsorption being less effective than in the
former case.The adsorption isotherms obey the Langmuir equation only in the first stages of the reaction but fit the Freundlich equations over the
whole range studied,so the heat of adsorption can be easily calculated.The results also show that the activated carbons obtained can be recovered
by filtration with an efficiency of 30% in the third cycle.

本研究涉及的Cr(VI)的吸附和工业废水,从合成所产生的污水处理厂.活化的碳是
从木质原料准备利用热治疗与650◦450
C在他面前酸(三氯化铝、盐酸、硫酸)和H3PO4和
基地(氢氧化钠)的代理商.优化的吸附铬(VI)、化学修饰物造成每个激活剂(相关的能力
Cr(VI)的去除),并得到了最佳实验条件的酸碱度、铬(VI)剂量、浓度、停留时间、吸附剂进行了研究.
因此,治疗产生碳H3PO4有高表面积和效率去除铬(VI),在比较短的均衡次.在
与之形成对比的是,表面活性剂的产生通过氢氧化钠要求网站中的吸附平衡时间长得少的有效比
前案件.朗缪尔波吸附静态吸附等温线听从只在第一阶段方程的反应,但身体的Freundlich方程的
研究了整个范围,换热吸附可以很容易地计算.结果还表明活化的碳获得就可以恢复了
以过滤效率30%的在第三周期.

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