Laboratory of Green Chemistry, Department of Chemistry, Lappeenranta University of Technology, Sammonkatu 12, FI-50130 Mikkeli, Finland.
Laboratory of Green Chemistry, Department of Chemistry, Lappeenranta University of Technology, Sammonkatu 12, FI-50130 Mikkeli, Finland.
Bioresour Technol. 2013 Nov;147:71-76. doi: 10.1016/j.biortech.2013.08.034. Epub 2013 Aug 14.
Aim of the study was to investigate how hydrothermal carbonization changes adsorption efficiency toward metal ions of typical sludges. Hydrothermal carbonization is a novel and green method of treating biomasses. Reactions take place in an aqueous environment at relatively mild temperature and high pressure resulting a different end biomass structure than obtained from traditional pyrolysis. Anaerobically digested sludge (ADS) and pulp and paper industry sludge (INS) were utilized as a feedstock. Adsorption behavior of ADS and INS was examined towards Pb(II), Cr(III), Cr(VI), As(III) and As(V). Both ADS and INS were found to remove Pb(II) effectively and followed Sips adsorption isotherm. Adsorption kinetics was fast and followed pseudo-second order model. Furthermore, intraparticle diffusion was observed to be partly responsible in the adsorption process. Hydrothermal carbonization indicated high potential for the production of novel carbonaceous materials for metal removal from waters.
本研究旨在探讨水热碳化如何改变典型污泥对金属离子的吸附效率。水热碳化是一种新型的绿色生物质处理方法。反应在相对温和的温度和高压下的水溶液中进行，得到的生物质结构与传统热解得到的结构不同。本研究使用厌氧消化污泥（ADS）和制浆造纸工业污泥（INS）作为原料。考察了 ADS 和 INS 对 Pb(II)、Cr(III)、Cr(VI)、As(III)和 As(V)的吸附行为。结果表明，ADS 和 INS 对 Pb(II)的吸附效果良好，符合 Sips 吸附等温线模型。吸附动力学快速，符合拟二级动力学模型。此外，内扩散被认为是吸附过程的一部分原因。水热碳化有望用于生产新型碳质材料，从水中去除金属。
