首页> 外文期刊>Polish Journal of Environmental Studies >Carbonized Waste Corrugated Paper Packaging Boxes as Low-Cost Adsorbent for Removing Aqueous Pb(Ⅱ), Cd(Ⅱ), Zn(Ⅱ), and Methylene Blue
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Carbonized Waste Corrugated Paper Packaging Boxes as Low-Cost Adsorbent for Removing Aqueous Pb(Ⅱ), Cd(Ⅱ), Zn(Ⅱ), and Methylene Blue

机译:低成本废纸的碳化废瓦楞纸包装盒,用于去除Pb(Ⅱ),Cd(Ⅱ),Zn(Ⅱ)和亚甲基蓝

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A common solid waste - corrugated-paper packaging boxes - was carbonized at 300, 450, and 600 degrees C to develop low-cost adsorbents (biochars). The resulting adsorbents were characterized and their adsorption performances were evaluated by the batch sorption of aqueous Pb(II), Zn(II), Cd(II), and methylene blue (MB). The biochar obtained at 600 degrees C exhibited larger specific surface area, higher mineral contents, and pH of zero point charge (pHPZC). Calcium carbonate, lead carbonate/basic, and zinc carbonate were observed in the metal-sorbed biochars by a power X-ray diffractometer (XRD). The biochar of higher pyrolysis temperature (600 degrees C) had high sorption capacity of aqueous Pb(II), Zn(II), and Cd(II) with the Langmuir maximum sorption capacity of 458, 146, and 10.7 mg g(-1), respectively. The pseudo-second-order model gave a better fit for the kinetic data of Pb(II), Zn(II), Cd(II), and MB onto the biochar (600 degrees C). Moreover, the electrostatic attraction was the dominant mechanism for adsorption of MB while precipitation could be the main mechanisms for adsorption of Pb(II), Zn(II), and Cd(II). Therefore, carbonization can be an efficient and value-addition method for the recycling of waste corrugated paper packaging boxes and for the low-cost wastewater treatment.
机译:一种常见的固体废物-瓦楞纸包装盒-在300、450和600摄氏度下碳化,以开发低成本的吸附剂(生物炭)。对所得吸附剂进行表征,并通过分批吸附水溶液中的Pb(II),Zn(II),Cd(II)和亚甲基蓝(MB)来评估其吸附性能。在600摄氏度下获得的生物炭具有更大的比表面积,更高的矿物质含量和零点电荷(pHPZC)。通过功率X射线衍射仪(XRD)在金属吸附的生物炭中观察到碳酸钙,碳酸铅/碱金属和碳酸锌。热解温度较高(600摄氏度)的生物炭对Pb(II),Zn(II)和Cd(II)水溶液的吸附能力较高,Langmuir最大吸附能力为458、146和10.7 mg g(-1) ), 分别。伪二级模型对生物炭(600摄氏度)上的Pb(II),Zn(II),Cd(II)和MB的动力学数据给出了更好的拟合。此外,静电吸引是吸附MB的主要机理,而沉淀可能是吸附Pb(II),Zn(II)和Cd(II)的主要机理。因此,碳化可以成为废瓦楞纸包装盒的回收利用和低成本废水处理的有效和增值方法。

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