Pb (II) Remediation from Aqueous Environment Using Chitosan-Activated Carbon-Polyvinyl Alcohol Composite Beads
Pb (II) Remediation from Aqueous Environment Using Chitosan-Activated Carbon-Polyvinyl Alcohol Composite Beads
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DOI：
10.1007/s11270-021-05243-8
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发表时间：
2021-07-01
影响因子：
2.9
通讯作者：
Kurasaki, Masaaki
中科院分区：
文献类型：
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作者：
Akter, Mahmuda;Hirase, Noriko;Kurasaki, Masaaki
铅（Pb）是一种毒性很大的重金属，可通过食物链进入生物系统，对人体健康造成严重损害。铅离子（Pb (II)）可以通过自然和人为来源释放到环境中。在各种类型的修复技术中，吸附技术因其经济可行性和通用性而被广泛接受。本文研究了壳聚糖-活性炭-聚乙烯醇（CS-AC-PVA）复合微球对Pb （II）的去除效果。结果表明，CS-AC- pva复合微球比单壳聚糖（CS）、活性炭（AC）和壳聚糖-活性炭复合微球具有更强的吸附水中Pb （II）的潜力。此外，CS-AC-PVA复合珠粒的吸附能力比CA-AC珠粒提高44%。CS-AC-PVA复合微珠对Pb （II）的吸附量在25℃时最高，随浓度的增加而增加，随温度的升高而降低。通过Freundlich等温线标记多个吸附位点的化学相互作用，很好地描述了平衡数据。因此，这种CS-AC-PVA复合头被证明是一种潜在的吸附剂，可用于环境修复水溶液中的Pb （II）。
Lead (Pb) is one of the greatly toxic heavy metals that can enter into the biological system through food chain and induce serious health impairments. Lead ion (Pb (II)) can be released in the environment through natural and anthropogenic sources. Among different types of remediation techniques, adsorption is one of the most well-accepted techniques due to its economic feasibility and versatility as well. Herein, the removal of Pb (II) was examined using chitosan-activated carbon-polyvinyl alcohol (CS-AC-PVA) composite beads. Results demonstrated that CS-AC-PVA composite beads have more potential to adsorb Pb (II) from the aqueous solution than lone chitosan (CS), activated carbon (AC), and chitosan-activated carbon composite beads. Moreover, CS-AC-PVA composite beads showed 44% more adsorbent capacity than CA-AC beads. The adsorption capacity of CS-AC-PVA composite beads for Pb (II) showed highest adsorption at 25 degrees C which is increased with increasing concentrations and decrease with increasing temperature. The equilibrium data is well described by Freundlich isotherm labeling chemical interaction via multiple adsorption sites. Thus, this hybrid CS-AC-PVA composite bead is proven as potential adsorbent for environmental remediation for Pb (II) from the aqueous solution.