<br>土壤塑料覆盖物生物降解可能造成的危害：微塑料和二氧化碳排放量增加,Journal of Hazardous Materials

当前位置： X-MOL 学术 › J. Hazard. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

土壤塑料覆盖物生物降解可能造成的危害：微塑料和二氧化碳排放量增加
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2024-02-02 , DOI: 10.1016/j.jhazmat.2024.133680
Yaqiong Hao ₁ , Ju Min ₂ , Shengrong Ju ₁ , Xiaoping Zeng ₃ , Jiyuan Xu ₄ , Jianbing Li ₅ , Hailong Wang ₆ , Sabry M Shaheen ₇ , Nanthi Bolan ₈ , Jörg Rinklebe ₉ , Weiming Shi ₁

Affiliation

State Key Laboratory of Soil and Sustainable Agriculture, Changshu National Agro-Ecosystem Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China.
State Key Laboratory of Soil and Sustainable Agriculture, Changshu National Agro-Ecosystem Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
Jiangsu Provincial Agricultural Technology Extension Station, Nanjing 210036, China.
National Agro-Tech Extension and Service Centre, Beijing 100026, China.
Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Institute of Vegetable Crops, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China.
School of Environmental and Chemical Engineering, Foshan University, Foshan 528000, China.
University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany; King Abdulaziz University, Faculty of Meteorology, Environment, and Arid Land Agriculture, Department of Arid Land Agriculture, Jeddah 21589, Saudi Arabia; University of Kafrelsheikh, Faculty of Agriculture, Department of Soil and Water Sciences, 33 516 Kafr El-Sheikh, Egypt.
UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia; The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia.
University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany.

可生物降解的覆盖物被广泛认为是生态友好的物质。然而，它们进入土壤后的降解百分比可能会因覆盖物类型和土壤微生物活动而异，引发人们对微塑料（MP）潜在增加的担忧。使用不同类型的覆盖物对土壤碳库的影响及其加速碳库消耗的潜力尚未得到充分了解。因此，我们进行了为期 18 个月的实验来研究覆盖物的生物降解及其对二氧化碳排放的影响。实验包括用聚乳酸（PLA）和聚己二酸对苯二甲酸丁二醇酯（PBAT）制成的可生物降解覆盖物掩埋土壤，并用传统覆盖物（PE）和无覆盖物（CK）进行对照处理。结果表明，PE未发生降解，PLA和PBAT的降解率分别为46.2%和88.1%，降解产生的MPs分别为6.7×10和37.2×10个/m。与 PE 相比，可生物降解的覆盖物，特别是 PLA，可以增强土壤微生物多样性并培育更复杂的细菌群落。 CK PE PLA 和 PBAT 中的 CO 排放量分别为 0.58、0.74、0.99 和 0.86 g C/kg。微生物丰度和多样性与CO排放呈正相关，与土壤总有机碳呈负相关。可生物降解的覆盖物通过刺激微生物活动增强土壤有机碳转化为二氧化碳。

"点击查看英文标题和摘要"

Possible hazards from biodegradation of soil plastic mulch: Increases in microplastics and CO2 emissions

Biodegradable mulches are widely recognized as ecologically friendly substances. However, their degradation percentage upon entering soils may vary based on mulch type and soil microbial activities, raising concerns about potential increases in microplastics (MPs). The effects of using different types of mulch on soil carbon pools and its potential to accelerate their depletion have not yet well understood. Therefore, we conducted an 18-month experiment to investigate mulch biodegradation and its effects on CO emissions. The experiment included burying soil with biodegradable mulch made of polylactic acid (PLA) and polybutylene adipate terephthalate (PBAT), and control treatments with traditional mulch (PE) and no mulch (CK). The results indicated that PE did not degrade, and the degradation percentage of PLA and PBAT were 46.2% and 88.1%, and the MPs produced by the degradation were 6.7 × 10 and 37.2 × 10 items/m, respectively. Biodegradable mulch, particularly PLA, can enhance soil microbial diversity and foster more intricate bacterial communities compared to PE. The CO emissions were 0.58, 0.74, 0.99, and 0.86 g C/kg in CK PE PLA, PBAT, respectively. A positive correlation was observed between microbial abundance and diversity with CO emissions, while a negative correlation was observed with soil total organic carbon. Biodegradable mulch enhanced the transformation of soil organic C into CO by stimulating microbial activity.

更新日期：2024-02-02

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南

全部期刊列表>>