Novel magnetic bio-sorbent hydrogel beads based on modified gum tragacanth/graphene oxide: Removal of heavy metals and dyes from water
Novel magnetic bio-sorbent hydrogel beads based on modified gum tragacanth/graphene oxide: Removal of heavy metals and dyes from water
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DOI：
10.1016/j.jclepro.2016.10.170
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发表时间：
2017-01-20
影响因子：
11.1
通讯作者：
Ghaemy, Mousa
中科院分区：
文献类型：
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作者：
Sahraei, Razieh;Pour, Zahra Sekhavat;Ghaemy, Mousa
以生物高分子黄蓍胶（GT）、聚乙烯醇（PVA）和氧化石墨烯（GO）为原料，采用凝胶法在硼酸的丙酮溶液中制备了新型磁性生物吸附剂水凝胶球。磁珠充分表征，并作为一种有效的吸附剂用于去除阳离子（结晶紫，CV）和阴离子（刚果红，CR）染料和重金属离子，如铅（II）和铜（II）从水溶液中。吸附速率符合准二级动力学模型，吸附等温线符合Langmuir模型，Pb（II）、Cu（II）、CV和CR的最大吸附量分别为81.78、69.67、94.0和101.74 mg g（-1）。珠粒的可重复使用性显示在三个循环后活性没有显著损失。这些磁性可回收珠可以被认为是一种有效和低成本的吸附剂，用于从水中去除染料（阳离子和阴离子）和重金属离子，以及柱应用。(C)2016爱思唯尔有限公司版权所有
New magnetic bio-sorbent hydrogel beads were prepared based on modified biopolymer gum tragacanth (GT), polyvinyl alcohol (PVA), and graphene oxide (GO) by using gelation method in the acetone solution of boric acid. The magnetic beads were fully characterized and used as an effective adsorbent for removal of both cationic (crystal violet, CV) and anionic (Congo red, CR) dyes and heavy metal ions such as Pb(II) and Cu(II) from aqueous solution. The adsorption rates were described by the pseudo-second-order kinetic model and the experimental data were fitted well with the Langmuir isotherm model with the maximum adsorption of 81.78, 69.67, 94.0, and 101.74 mg g(-1) for Pb(II), Cu(II), CV, and CR, respectively. The reusability of the beads showed no significant loss of activity after three cycles. These magnetic recyclable beads can be considered as an efficient and low-cost adsorbent for the removal of dyes (cationic and anionic) and heavy metal ions from water, and column applications. (C) 2016 Elsevier Ltd. All rights reserved.