回收纸和纸,纤维素的潜在来源:可行性评估和表征
E K Suter1, H L Rutto1, T S Seodigeng1
1Department of Chemical Engineering and Metallurgy, Clean Technology and Applied Materials Research Group, Vaal University of Technology, Vanderbijlpark, South Africa.
概括
纸和纸含有丰富的纤维素 (74%) 和有机物质,具有作为可再生资源的潜力. 然而,多环芳香化合物 (PAHs) 需要谨慎管理,以确保环境安全.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 纸和纸张行业使用纤维素,一种可再生资源.
- 产生的泥给环境和公共卫生带来了挑战.
- 污泥的表征对于废物管理和资源回收至关重要.
研究的目的:
- 为了全面评估纸和纸的组成.
- 评估潜在的环境影响,并确定可利用的可再生资源.
- 为了确定污泥是否适合进一步的应用.
主要方法:
- 使用pH值,电导率,和总有机物分析进行泥表征.
- 纤维素含量和水容量 (WHC) 的确定.
- 元素分析,多环芳香化合物 (PAHs) 的量化,X射线衍射 (XRD),扫描电子显微镜 (SEM) 和热重力测量分析/衍生物热重力测量 (TGA/DTG).
主要成果:
- 泥的特性:pH 7.32,导电率 1.84 mS/cm, 2.65%,有机物质 41.23%.
- 高纤维素含量 (74.07%) 具有显著的水容量 (53.07%).
- 主要元素:C,O;检测到PAH高达322.56ng/g;XRD显示CaCO3;SEM显示纤维 (280μm);TGA/DTG确认纤维素/半纤维素 (64.7重量). 百分之一). %).
结论:
- 纸和纸是一种有价值的纤维素和有机物质来源.
- 存在PAHs需要风险评估和管理策略.
- 污泥的组成表明,作为可再生资源的价值化潜力.
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