Recyclable hydrogel beads from sodium alginate@cellulose/GO for aqueous solution purification from heavy metals

IF 5.8 3区 环境科学与生态学 0 ENVIRONMENTAL SCIENCES
Rabab. A. Nasr, Tarek S. Jamil, Shimaa M. Abdel Moniem, Sawsan Dacrory
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引用次数: 0

Abstract

An improved adsorption capacity was achieved in a new composites of recyclable adsorbents made of cellulose, alginate, and graphene oxide (SA/Cell./GO). To purify water systems of heavy metals, sustainable materials such as pulp fiber and cellulosic biomass cellulose, and cost-effective polymers alginate and graphene oxide with a high adsorption capability, were utilized. The as-synthesized hydrogel beads were characterized using HRSEM, EDX, XRD, and FTIR-ATR techniques. Batch adsorption experiments of lead and cadmium in water were used to assess the adsorption properties of SA/Cell./GO hydrogel beads. This study looked at how different factors such initial metal concentration, pH, temperature, adsorbent dosage, contact time, and adsorption dosage affected metals adsorption. At a pH of 5.5 and an adsorbent dosage of 0.6 g/L, the results reveal that the removal effectiveness of cadmium ions reached 99.5% after 60 min, while the removal efficiency of lead ions reached 100% after 40 min. An adsorption mechanism and kinetics model based on pseudo-first-order kinetics was the most fitted. Results from equilibrium adsorption experiments were consistent with the Freundlich adsorption isotherm. Pre- and post-adsorption HRSEM, EDX, XRD, and FTIR-ATR analyses verified that SA/Cell./GO was highly effective for adsorbing Cd and Pb metals, simultaneously.

可回收的水凝胶珠从钠alginate@cellulose/氧化石墨烯用于水中净化重金属。
由纤维素、海藻酸盐和氧化石墨烯(SA/Cell./GO)组成的新型可回收吸附剂复合材料的吸附能力得到了提高。为了净化水系统中的重金属,使用了可持续材料,如纸浆纤维和纤维素生物质纤维素,以及具有高吸附能力的具有成本效益的聚合物海藻酸盐和氧化石墨烯。采用HRSEM、EDX、XRD和FTIR-ATR技术对合成的水凝胶珠进行了表征。通过批量吸附实验考察了SA/Cell对水中铅和镉的吸附性能。/GO水凝胶珠。本研究考察了初始金属浓度、pH、温度、吸附剂用量、接触时间和吸附用量等不同因素对金属吸附的影响。在pH = 5.5、吸附剂投加量为0.6 g/L的条件下,60 min后对镉离子的去除率达到99.5%,40 min后对铅离子的去除率达到100%,拟一阶动力学吸附机理和动力学模型最符合。平衡吸附实验结果符合Freundlich吸附等温线。吸附前和吸附后的HRSEM, EDX, XRD和FTIR-ATR分析证实了SA/Cell。氧化石墨烯同时对镉、铅金属具有较好的吸附效果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
8.70
自引率
17.20%
发文量
6549
审稿时长
3.8 months
期刊介绍: Environmental Science and Pollution Research (ESPR) serves the international community in all areas of Environmental Science and related subjects with emphasis on chemical compounds. This includes: - Terrestrial Biology and Ecology - Aquatic Biology and Ecology - Atmospheric Chemistry - Environmental Microbiology/Biobased Energy Sources - Phytoremediation and Ecosystem Restoration - Environmental Analyses and Monitoring - Assessment of Risks and Interactions of Pollutants in the Environment - Conservation Biology and Sustainable Agriculture - Impact of Chemicals/Pollutants on Human and Animal Health It reports from a broad interdisciplinary outlook.
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