Jéssica Rafaelly Almeida Lopes , Zabele Laís Lyra Mendonça , João Paulo Siqueira da Silva , Ademir Amaral , André Maciel Netto
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The biochars were produced from sugarcane bagasse by pyrolysis process in a muffle furnace. In laboratory conditions, with saturated soil columns under steady-state, analyses of the mechanisms involved in interaction and transport and determining hydrodispersive parameters for Imazapic were performed by the two-site nonequilibrium transport model using the CXTFIT 2.0 program. Samples of YUd soil amended with biochar pyrolyzed at 300 °C presented a negligible interaction with Imazapic. However, adding biochar pyrolyzed at 500 °C (BC500) to the soil samples enhanced the adsorption coefficient and improved the interaction with Imazapic. This research points out that biochar produced from agricultural waste biomass, such as sugarcane bagasse specifically pyrolyzed at 500 °C, offers a potential means to adsorb herbicides, reducing their leaching to deeper layers of the amended soils and the risk of groundwater contamination and potential environmental negative impacts.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"266 ","pages":"Article 104412"},"PeriodicalIF":3.5000,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhancing herbicide adsorption in low-fertility soil using sugarcane biochar: Insights from Imazapic dynamics\",\"authors\":\"Jéssica Rafaelly Almeida Lopes , Zabele Laís Lyra Mendonça , João Paulo Siqueira da Silva , Ademir Amaral , André Maciel Netto\",\"doi\":\"10.1016/j.jconhyd.2024.104412\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Biochar amendment has emerged as a potential solution for preventing, remediating, and mitigating agricultural compound pollution. 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引用次数: 0
摘要
生物炭改良剂已成为预防、修复和减轻农业化合物污染的潜在解决方案。这一突破性技术不仅能改善土壤的孔隙度、保水能力、阳离子交换能力和 pH 值等重要特性,还能对污染分子的相互作用和滞留机制产生错综复杂的影响。在本研究中,我们研究了除草剂 Imazapic 在巴西 Igarassu-PE 甘蔗种植区的低肥力土壤--萎缩性黄色超土壤(YUd)--中应用热解生物炭(特别是在 300 和 500 °C 温度下)时的动态变化。生物炭是由甘蔗渣在马弗炉中通过热解工艺制成的。在实验室条件下,饱和土壤柱处于稳态,使用 CXTFIT 2.0 程序,通过两点非平衡迁移模型分析了伊马氮平的相互作用和迁移机制,并确定了伊马氮平的水分散参数。用 300 °C 高温分解的生物炭改良的裕德土壤样品与 Imazapic 的相互作用可以忽略不计。然而,在土壤样品中加入 500 °C 高温分解的生物炭(BC500)后,吸附系数提高了,与 Imazapic 的相互作用也有所改善。这项研究指出,由农业废弃生物质(如专门在 500 °C 高温下热解的甘蔗渣)制成的生物炭为吸附除草剂提供了一种潜在的方法,可减少除草剂向改良土壤深层的沥滤,降低地下水污染风险和潜在的环境负面影响。
Enhancing herbicide adsorption in low-fertility soil using sugarcane biochar: Insights from Imazapic dynamics
Biochar amendment has emerged as a potential solution for preventing, remediating, and mitigating agricultural compound pollution. This groundbreaking technique not only improves crucial soil properties like porosity, water retention capacity, cation exchange capacity, and pH, but also intricately impacts the interaction and retention mechanisms of polluting molecules. In this study, we investigate the dynamic of the herbicide Imazapic when subjected to applying pyrolyzed biochars, specifically at temperatures of 300 and 500 °C, within the context of a low-fertility soil characterized as dystrophic Yellow Ultisol (YUd) in a sugarcane cultivation area in Igarassu-PE, Brazil. The biochars were produced from sugarcane bagasse by pyrolysis process in a muffle furnace. In laboratory conditions, with saturated soil columns under steady-state, analyses of the mechanisms involved in interaction and transport and determining hydrodispersive parameters for Imazapic were performed by the two-site nonequilibrium transport model using the CXTFIT 2.0 program. Samples of YUd soil amended with biochar pyrolyzed at 300 °C presented a negligible interaction with Imazapic. However, adding biochar pyrolyzed at 500 °C (BC500) to the soil samples enhanced the adsorption coefficient and improved the interaction with Imazapic. This research points out that biochar produced from agricultural waste biomass, such as sugarcane bagasse specifically pyrolyzed at 500 °C, offers a potential means to adsorb herbicides, reducing their leaching to deeper layers of the amended soils and the risk of groundwater contamination and potential environmental negative impacts.
期刊介绍:
The Journal of Contaminant Hydrology is an international journal publishing scientific articles pertaining to the contamination of subsurface water resources. Emphasis is placed on investigations of the physical, chemical, and biological processes influencing the behavior and fate of organic and inorganic contaminants in the unsaturated (vadose) and saturated (groundwater) zones, as well as at groundwater-surface water interfaces. The ecological impacts of contaminants transported both from and to aquifers are of interest. Articles on contamination of surface water only, without a link to groundwater, are out of the scope. Broad latitude is allowed in identifying contaminants of interest, and include legacy and emerging pollutants, nutrients, nanoparticles, pathogenic microorganisms (e.g., bacteria, viruses, protozoa), microplastics, and various constituents associated with energy production (e.g., methane, carbon dioxide, hydrogen sulfide).
The journal''s scope embraces a wide range of topics including: experimental investigations of contaminant sorption, diffusion, transformation, volatilization and transport in the surface and subsurface; characterization of soil and aquifer properties only as they influence contaminant behavior; development and testing of mathematical models of contaminant behaviour; innovative techniques for restoration of contaminated sites; development of new tools or techniques for monitoring the extent of soil and groundwater contamination; transformation of contaminants in the hyporheic zone; effects of contaminants traversing the hyporheic zone on surface water and groundwater ecosystems; subsurface carbon sequestration and/or turnover; and migration of fluids associated with energy production into groundwater.