纤维微塑料对污泥生物炭热解行为以及碳结构的影响  

The Influence of Fibrous Microplastics on Sludge Biochar Pyrolysis Behavior and Carbon Structure

作　　者：沈婷婷[1] 储瑶竹 唐圆圆 SHEN Tingting;CHU Yaozhu;TANG Yuanyuan(Department of Environmental Engineering,School of Life Sciences,Taizhou University,Taizhou Zhejiang 318000;Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen Guangdong 518055;School of Mechanical and Manufacturing Engineering,University of New South Wales,Sydney NSW Australia 2052)

机构地区：[1]台州学院生命科学学院环境工程系,浙江台州318000 [2]南方科技大学环境科学与工程学院,广东省土壤与地下水污染防控及修复重点实验室,广东深圳518055 [3]新南威尔士大学机械与制造工程学院,澳大利亚悉尼2052

出　　处：《环境卫生工程》2025年第1期85-92,共8页Environmental Sanitation Engineering

基　　金：国家自然科学基金委面上项目(42277403);广东省自然科学基金项目杰出青年项目(2021B1515020041);广东省基础与应用基础研究重大项目(2023B0303000024)。

摘　　要：随着塑料制品广泛使用,大量纤维微塑料积聚在污泥中,加剧了污泥热解高效处置的难度。同时,高丰度纤维微塑料的存在可能会改变污泥热解行为和污泥生物炭的结构,继而影响污泥的资源化利用。因此,亟需了解高丰度微塑料对污泥热解行为及污泥生物炭结构的影响。将典型纤维微塑料聚对苯二甲酸乙二醇酯(PET,≤0.15 mm)按不同比例(0、15%、30%)掺混在污泥中,并在不同温度下(300~700℃)进行热解,制备得到相应的污泥生物炭。结果表明:热解温度较低时PET与污泥之间的相互作用会降低生物炭的产率,而热解温度较高时两者的相互作用则有利于提高生物炭产率。同时,高丰度PET能提高生物炭的芳香化程度,增强碳结构的有序性。此外,在热解温度较低时,PET能提高污泥生物炭的碳滞留率以及碳稳定性。而在热解温度较高时,高丰度PET的存在会降低生物炭的碳滞留率以及长期稳定性。With extensive use of plastic products,lots of fibrous microplastics have been discharged and accumulated in sewage sludge,posing a great challenge for sludge pyrolysis treatment.Moreover,high concentration of fibrous microplastics may alter the sludge pyrolysis behavior and sludge biochar structure,impacting the subsequent reuse of sludge.Therefore,it is urgent to understand the influence of fibrous microplastics on sludge pyrolysis behavior as well as sludge biochar structure.In this study,polyethylene terephthalate(PET,≤0.15 mm),the typical fibrous microplastic,had been added into sludge with various mass ratios(0,15%and 30%),and then the mixture was pyrolyzed at different temperatures(300-700℃).Results showed that the synergistic interaction of PET and sludge reduced yield of biochar at lower pyrolysis temperatures,while promoted yield of sludge at higher pyrolysis temperatures.Meanwhile,high abundance of PET in sludge could enhance the fraction of larger fused aromatic ring systems and increase degree of structural arrangement in biochar.In addition,for the biochar obtained at lower pyrolysis temperatures,the carbon retention ratio and long-term stability were improved by PET.However,for the biochar pyrolyzed at higher temperatures,high abundance of PET could reduce the carbon retention ratio and long-term stability.

关 键 词：污泥热解 污泥生物炭 纤维微塑料 聚对苯二甲酸乙二醇酯 碳结构 

分 类 号：X703[环境科学与工程—环境工程]