| 郭江山,顾卫华,白建峰,董滨,庄绪宁,赵静,张承龙.污泥处理渣对电子废弃物拆解污染土壤的改良作用[J].农业环境科学学报,2022,41(12):2613-2621. |
| 污泥处理渣对电子废弃物拆解污染土壤的改良作用 |
| Treated sludge residue amelioration of contaminated soil at an e-waste dismantling site |
| 投稿时间：2022-10-12 修订日期：2022-11-28 |
| DOI：10.11654/jaes.2022-1021 |
| 中文关键词: 污泥热解 污泥好氧发酵 土壤污染 重金属 生态修复 |
| 英文关键词: sludge pyrolysis sludge aerobic fermentation soil pollution heavy metal ecological restoration |
| 基金项目:国家重点研发计划项目（2019YFC1906100）；国家自然科学基金项目（51578397） |
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| 中文摘要: |
| 为探究两种污泥处理渣对电子废弃物拆解污染土壤的改良作用，通过盆栽试验解析添加热解渣和好氧发酵渣对土壤养分、酶活性、重金属浸出与植物（黑麦草和香根草）生长、吸收重金属的影响，并通过模糊隶属函数评价土壤改良效果。结果表明：施用两种污泥处理渣（施用量均为5%）向土壤引入了类胡敏酸物质；显著提高土壤电导率（220%~238%）、铵态氮（16%~66%）、阳离子交换量（37%~84%）、有效磷（34%~42%）、速效钾（44%~97%）、有机质（17%~47%）含量和荧光素双醋酸酯（FDA）酶活性（67%~119%）；显著提高植物鲜质量（32%~36%）、株高（18%~22%）及叶绿素（12%~16%）、磷（33%~48%）和钾（12%~21%）含量；显著降低植物Cu（17%~33%）、Zn（5%~9%）、Pb（32%）、Cd（35%）和丙二醛（18%~22%）含量；显著降低土壤Cu（10%~19%）、Zn（18%~20%）、Pb（10%~16%）和Cd（13%~15%）的浸出量。土壤改良效果的排序为好氧发酵渣>热解渣，香根草>黑麦草。研究表明，施用两种污泥处理渣均促进了植物生长和土壤改良，其中好氧发酵渣和香根草在电子废弃物拆解污染土壤生态修复领域具有更佳的应用潜力。 |
| 英文摘要: |
| The effects of two types of treated sludge residue on soil improvement were evaluated in a potting experiment by adding pyrolysis residue and aerobic fermentation residue to the soil. The effects of parameters such as soil nutrients, enzyme activities, leaching content of heavy metals, and plants（Lolium perenne and Vetiveria zizanioides）on heavy metal accumulation and growth were analyzed. Additionally, the effects of soil improvement were evaluated using the fuzzy membership function. The results showed that application（5%）of the two types of treated sludge residue introduced humic acid-like substances into the soil. The soil conductivity（220% - 238%）, ammonium nitrogen（16%-66%）, cation exchange capacity（37%-84%）, available phosphorus（34%-42%）, available potassium（44%-97%）, organic matter content（17%-47%）, and enzymatic activity of fluorescein diacetate（67%-119%）were significantly increased. The fresh weight （32%-36%）, height（18%-22%）, chlorophyll（12%-16%）, phosphorus（33%-48%）, and potassium content（12%-21%）of plants were also significantly increased. The concentrations of Cu（17%-33%）, Zn（5%-9%）, Pb（32%）, Cd（35%）, and malondialdehyde（18%-22%） were significantly reduced. The leaching amount of Cu（10%-19%）, Zn（18%-20%）, Pb（10%-16%）, and Cd（13%-15%）of soil were significantly reduced. The order of soil improvement effects of each treatment was as follows：aerobic fermentation residue > pyrolysis residue, V. zizanioides>L. perenne. Our results indicate that the two methods for treating sludge residue promote improvements in soil quality and plant growth. Aerobic fermentation residue and V. zizanioides show application potential for the ecological restoration of soil at e-waste dismantling sites. |
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