Journal of environmental quality最新文献_第2页

Utilizing biochars to stabilize mercury in contaminated floodplain sediment: Implications on mercury remediation 利用生物炭稳定受污染洪泛区沉积物中的汞：对汞修复的影响

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2024-08-20 DOI: 10.1002/jeq2.20616

Brittany E. Jensen, Breann Spencer, Xiaoyu Xu

{"title":"Utilizing biochars to stabilize mercury in contaminated floodplain sediment: Implications on mercury remediation","authors":"Brittany E. Jensen, Breann Spencer, Xiaoyu Xu","doi":"10.1002/jeq2.20616","DOIUrl":"10.1002/jeq2.20616","url":null,"abstract":"Major weather events contribute to the mobility and remobilization of legacy mercury (Hg) contamination and sequestration within sediments. Remediation using biochar as a soil amendment is a useful technique to immobilize and decrease Hg toxicity. This study explored whether biochar application is effective at stabilizing labile mercury (LaHg) from floodplain sediment. Controlled mesocosms simulating contamination events and flooding conditions were conducted. Floodplain sediment, which experiences annual periodic flooding, was collected. Sediment was spiked with inorganic Hg, applied with different types of biochar, and experienced simulated flooding events. Four types of biochar, pure rice husk (RH), pure peanut hull (PH), sulfur-modified rice husk (SMRH), and sulfur-modified peanut hull (SMPH), were applied at 10 and 40 g/kg rates (i.e., RH 10, RH 40; PH 10, PH 40, SMRH 10, SMRH 40, SMPH 10, SMPH 40). Total Hg, methylmercury, and LaHg concentrations were analyzed by coupling with redox potential measurements. Results indicate that SMRH 10, PH 10, PH 40, SMPH 10, and SMPH 40 successfully remediate Hg by stabilizing and reducing LaHg species from floodplain sediment. However, a high Hg methylation potential was observed with unsulfated and sulfated peanut hulls (PH 10, PH 40, SMPH 10, and SMPH 40), as they tend to create a reducing microenvironment that favors sulfate reduction reactions. Additionally, sulfur-modified biochar tends to promote Hg methylation potential at high application rates (i.e., 40 g/kg). We thus recommend using SMRH at a relatively low application rate (SMRH 10) for the remediation of Hg from floodplain sediment.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jeq2.20616","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142004358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fate and transport of fragmented and spherical microplastics in saturated gravel and quartz sand 饱和砾石和石英砂中碎片和球形微塑料的归宿和迁移。

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2024-08-20 DOI: 10.1002/jeq2.20618

Ahmad Ameen, Margaret E. Stevenson, Alexander K. T. Kirschner, Stefan Jakwerth, Julia Derx, Alfred P. Blaschke

{"title":"Fate and transport of fragmented and spherical microplastics in saturated gravel and quartz sand","authors":"Ahmad Ameen, Margaret E. Stevenson, Alexander K. T. Kirschner, Stefan Jakwerth, Julia Derx, Alfred P. Blaschke","doi":"10.1002/jeq2.20618","DOIUrl":"10.1002/jeq2.20618","url":null,"abstract":"Microplastics in urban runoff undergo rapid fragmentation and accumulate in the soil, potentially endangering shallow groundwater. To improve the understanding of microplastic transport in groundwater, column experiments were performed to compare the transport behavior of fragmented microplastics (FMPs ∼1-µm diameter) and spherical microplastics (SMPs ∼1-, 10-, and 20-µm diameter) in natural gravel (medium and fine) and quartz sand (coarse and medium). Polystyrene microspheres were physically abraded with glass beads to mimic the rapid fragmentation process. The experiments were conducted at a constant flow rate of 1.50 m day−1 by injecting two pore volumes of SMPs and FMPs. Key findings indicate that SMPs showed higher breakthrough, compared to FMPs in natural gravel, possibly due to size exclusion of the larger SMPs. Interestingly, FMPs exhibited higher breakthrough in quartz sand, likely due to tumbling and their tendency to align with flow paths, while both sizes (larger and smaller relative to FMPs) of SMPs exhibited higher removal in quartz sand. Therefore, an effect due to shape and size was observed.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jeq2.20618","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142004357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The LTAR Integrated Common Experiment at Upper Mississippi River Basin-Platteville. 密西西比河上游流域普拉特维尔 LTAR 综合共同实验。

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2024-08-13 DOI: 10.1002/jeq2.20620

Dennis L Busch, Kishan Mahmud, Jane M F Johnson, Athanasios Papanicolaou, John M Baker, Andrew D Cartmill

{"title":"The LTAR Integrated Common Experiment at Upper Mississippi River Basin-Platteville.","authors":"Dennis L Busch, Kishan Mahmud, Jane M F Johnson, Athanasios Papanicolaou, John M Baker, Andrew D Cartmill","doi":"10.1002/jeq2.20620","DOIUrl":"https://doi.org/10.1002/jeq2.20620","url":null,"abstract":"Alternative agronomic practices are needed to address the various climatic, agronomic, edaphic, and water quality related challenges faced by the dairy farmers of the Driftless Area (DA) in the Upper Mississippi River Basin (UMRB). These practices should be innovative in nature, inclusive of regional stakeholders, and sustainable to meet the future food and climate related challenges of Wisconsin agriculture. Here, we outline our Integrated (grazing and cropland) Long-Term Agroecosystem Research Common Experiment at the University of Wisconsin-Platteville Pioneer Farm (UW-P PF) in the UMRB and describe our collaboration in this USDA network. In this field-scale experiment, we are comparing the conventional dairy production system common to this region (i.e., corn-on-corn [Zea mays L.] for 4 years, followed by alfalfa [Medicago sativa L.] for 3 years, with no cover crops) with two alternative dairy production systems-(1) soil health management with no-till, cover crops, and application of a novel manure-based nutrient-rich stable product, and (2) management intensive grazing-and rotational grazing on pastures established with diverse forage-legume mix. Meteorological, edaphic, hydrologic, and agronomic data are collected and analyzed at regular frequencies. Going forward, the experiment will continue as a form of stakeholder-driven adaptive research and receive evaluation on a regular basis to determine whether any changes are required to address the \"real-world\" challenges faced by the farmers in the Midwest.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141971236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The LTAR Grazing Land Common Experiment at the Great Basin. 大盆地的 LTAR 牧场共同实验。

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2024-08-10 DOI: 10.1002/jeq2.20617

Patrick E Clark, Craig D Woodruff, Andrew R Hedrick, Stuart P Hardegree, Gerald N Flerchinger

{"title":"The LTAR Grazing Land Common Experiment at the Great Basin.","authors":"Patrick E Clark, Craig D Woodruff, Andrew R Hedrick, Stuart P Hardegree, Gerald N Flerchinger","doi":"10.1002/jeq2.20617","DOIUrl":"https://doi.org/10.1002/jeq2.20617","url":null,"abstract":"The Long-Term Agroecosystem Research Network (LTAR), through its Common Experiment (CE) framework, contrasts prevailing and alternative agricultural practices for efficacy and sustainability within the indicator domains of environment, productivity, economics, and society. Invasive species, wildfire, and climate change are principal threats to Great Basin agroecosystems. Prescribed grazing may be an effective tool for restoring lands degraded by these disturbances. At the Great Basin (GB) LTAR site headquartered in Boise, ID, our contribution to the CE contrasts a prevailing (PRV), cattle grazing practice of fixed moderate stocking and duration with an alternative (ALT), prescribed grazing practice called high-intensity low-frequency (HILF) grazing where stocking and duration are tailored to suppress invasive annual grass competition with native or desirable plant species and thus promote recovery of rangelands degraded by annual grass invasion and recurrent wildfire. Preliminary results indicate cheatgrass density and fuel height have been reduced in ALT-treated paddocks compared to PRV paddocks. Since its inception in 2014, our GB CE has been a research co-production effort among ranchers, public land managers, and researchers. Future directions for this research will center on expanding the experiment to multiple study areas to better address the scope of the annual grass/wildfire problem. We expect this research will lead to effective and sustainable grazing practices for restoring >41 million hectares of degraded rangelands in the Great Basin and other areas of the western United States.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141912898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Removal of nutrients from aquaculture wastewater using cattail (Typha spp.) constructed wetlands 利用香蒲（Typha spp.）建造的湿地去除水产养殖废水中的营养物质。

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2024-08-10 DOI: 10.1002/jeq2.20608

Nicholas C. Blandford, Kenton McCorquodale-Bauer, Richard Grosshans, Bruce Hardy, Nazim Cicek, Vince Palace

{"title":"Removal of nutrients from aquaculture wastewater using cattail (Typha spp.) constructed wetlands","authors":"Nicholas C. Blandford, Kenton McCorquodale-Bauer, Richard Grosshans, Bruce Hardy, Nazim Cicek, Vince Palace","doi":"10.1002/jeq2.20608","DOIUrl":"10.1002/jeq2.20608","url":null,"abstract":"The aquaculture industry is among the fastest growing food production sectors in the world. Land-based aquaculture systems continue to increase in popularity as they offer the benefits of controlling diseases, managing water quality, and minimizing threats to wild populations of fish. However, these systems discharge wastewater high in N and P. The ability of cattail (Typha spp.) constructed wetlands (CWs) to remove N and P from aquaculture wastewater (AWW) was examined here. Cattail CWs were established in mesocosms and had a gradient of AWW applied weekly for a total of 5 weeks. Total N and P loadings ranged from 13.7 to 209.2 mg m−2 and 3.01 to 45.97 mg m−2 over 28 days, respectively. Additions of AWW did not cause elevations in total dissolved N, total ammonia N, or nitrite N in CW water; however, concentrations of nitrate N and P in CW water were related to nutrient loading conditions. Elevations in P persisted for 3–4 weeks among high nutrient loading treatments, providing an opportunity for eutrophic conditions to develop in CW systems. However, after 33 days of treatment, >95% total P concentration reduction was achieved in all mesocosms with final concentrations <0.05 mg L−1, equivalent to reference conditions. High-loading treatments achieved greater P load reduction (856.8–955.0 mg m−2 year−1) than low-loading and reference treatments (591.7–792.7 mg m−2 year−1). This study demonstrates the effectiveness of cattail CWs to remove nutrients during AWW treatment and highlights the potential for end-of-season use in northern climates, providing insights regarding the operational timeline of such systems.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jeq2.20608","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141912897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Variations in fluorescence properties of humic acids from calcareous soils amended with different swine manures in a long-term soil experiment 在一项长期土壤实验中，用不同猪粪改良过的石灰性土壤中腐殖酸的荧光特性的变化。

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2024-08-10 DOI: 10.1002/jeq2.20619

Ibrahim Mohammed, Busayo Kudaolu, Yuki Audette, James G. Longstaffe

{"title":"Variations in fluorescence properties of humic acids from calcareous soils amended with different swine manures in a long-term soil experiment","authors":"Ibrahim Mohammed, Busayo Kudaolu, Yuki Audette, James G. Longstaffe","doi":"10.1002/jeq2.20619","DOIUrl":"10.1002/jeq2.20619","url":null,"abstract":"Molecular properties of soil humic acid (HA) can play an important role in the mechanisms regulating plant nutrient availability. This study explores how the structure of HA is altered by long-term treatment with different forms of swine manure and how these changes may influence nutrient availability. Liquid swine manure (LSM), solid swine manure (SSM), and swine manure compost (SMC) were applied to a calcareous soil over 17 years in a long-term soil fertility study. HA was extracted from site soil samples and analyzed using fluorescence spectroscopic techniques, including a Cu2+ quenching experiment, in order to assess differences in the structure and functionality of the soil organic matter (SOM) resulting from these different treatments. Emission spectra of the SSM-HA and SMC-HA are similar, while the LSM-HA is distinct. Procedures such as parallel factor analysis (PARAFAC) decomposition of emission–excitation matrices showed that structures in the SSM-HA and SMC-HA samples have lower complexity, whereas the structures of LSM-HA are of higher complexity. Interactions with Cu2+ at different pH levels indicate that the LSM-HA shows more dynamic conformational changes as well as stronger interactions and higher quenching efficiency compared to the other treatments. Conversely, SMC-HA demonstrates relatively stable binding constant (Ka) values across different pH levels. The binding constants and quenching efficiency of SSM-HA are significantly affected by changes in pH. This study shows distinct structural characteristics of HA formed under different manure management systems and provides valuable insights into how these variations may impact nutrient dynamics in soils.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jeq2.20619","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141912899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The LTAR Cropland Common Experiment at Central Mississippi River Basin. 密西西比河流域中部的 LTAR 耕地共同试验。

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2024-08-07 DOI: 10.1002/jeq2.20614

Lori J Abendroth, Adam P Schreiner-McGraw, Curtis J Ransom, Claire Baffaut, Kenneth A Sudduth, Kristen S Veum

引用次数: 0

Regional quality analysis of the hydrological environment with an improved random forest model based on the chimpanzee algorithm 利用基于黑猩猩算法的改进型随机森林模型对水文环境进行区域质量分析。

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2024-08-05 DOI: 10.1002/jeq2.20609

Xuesong Li, Liangliang Zhang, Xian Chen, Yifan Yang, Xiaoyun Mao

{"title":"Regional quality analysis of the hydrological environment with an improved random forest model based on the chimpanzee algorithm","authors":"Xuesong Li, Liangliang Zhang, Xian Chen, Yifan Yang, Xiaoyun Mao","doi":"10.1002/jeq2.20609","DOIUrl":"10.1002/jeq2.20609","url":null,"abstract":"High-precision evaluations of water environment quality are highly important for improving the accuracy of early warning systems of regional water pollution risk and improving the regional water environment. This paper employs the chimp optimization algorithm (ChOA) to enhance the traditional random forest model, resulting in the chimp optimization algorithm-random forest (ChOA-RF) water quality assessment model for evaluating the Jiansanjiang area in Heilongjiang Province, China. The results show that the overall water environment in Jiansanjiang has the following characteristics: “The water quality of farms in the northwest is poor, and the quality of groundwater is better than that of surface water.” Total nitrogen (TN) and total phosphorus (TP) in surface water and ammonium nitrogen (NH3-N), ferrum (Fe), and manganese (Mn) in groundwater are the main pollutants. The TP and TN in surface water and the NH3-N in groundwater exceeded the relevant standards, likely due to the excessive application of chemical fertilizers, especially nitrogen fertilizers. Additionally, Fe and Mn are harmful native substances. According to these findings, targeted improvement strategies, such as reducing nitrogen fertilizer application, plugging well, and increasing the surface water utilization rate, are proposed. Moreover, the ChOA-RF model is compared with the traditional empirical value model and the particle swarm optimization-random forest (PSO-RF) model. The results show that the ChOA-RF model can effectively reduce the root mean square error and mean absolute percentage error and improve the coefficient of determination. The running time and convergence ability are also better than those of the PSO-RF model, which is a more accurate and efficient machine learning model. The model can be used not only for high-precision evaluation of regional water environment quality but also for other machine learning fields.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141893575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strategic tillage of no-till decreased surface and subsurface losses of dissolved phosphorus 战略性免耕减少了地表和地下溶解磷的损失。

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2024-08-05 DOI: 10.1002/jeq2.20612

Risto Uusitalo, Riitta Lemola, Mira Šuštar, Mika Kurkilahti, Janne Kaseva, Eila Turtola

{"title":"Strategic tillage of no-till decreased surface and subsurface losses of dissolved phosphorus","authors":"Risto Uusitalo, Riitta Lemola, Mira Šuštar, Mika Kurkilahti, Janne Kaseva, Eila Turtola","doi":"10.1002/jeq2.20612","DOIUrl":"10.1002/jeq2.20612","url":null,"abstract":"Enrichment of soluble P on the surface layer of long-term no-till (NT) soils, and consequent increase in dissolved P losses, is a concern for which occasional plowing has been suggested as a remedy. We measured the effect of such strategic tillage (ST) on surface and subsurface P losses from 0.5-ha field plots on clay soil for 4 years. Two NT plots had discharged threefold dissolved molybdate-reactive P (DRP) losses compared to annually plowed soil conventional tillage (CT). ST by plowing to 20-cm depth was applied on one of the NT plots, whereas the other remained under NT. ST done in July was sown with canola (Brassica napus ssp. oleifera) to establish plant cover before winter. Summed 4-year DRP loss from ST treatment was 60% lower compared to NT (0.78 vs. 1.96 kg ha−1), accompanied with 11% higher particulate P (PP) loss (4.39 vs. 3.97 kg ha−1). CT plots produced slightly lower DRP losses (0.53–0.76 kg ha−1) than ST, but higher PP losses (6.02–7.96 kg ha−1). Bioavailable P (BAP) losses from ST were lower than from the other treatments if >7% of PP turns bioavailable. After ST, soil P stratification first vanished, but started to develop again when NT was resumed. Occasional tillage of NT soils mitigates DRP losses over several years, and it was at the study site the preferred mitigation option in reducing BAP losses.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jeq2.20612","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141893576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Soil fertilization with microalgae biomass from municipal wastewater treatment causes no additional leaching of dissolved macronutrients and trace elements in a column experiment 在柱状实验中，用城市污水处理产生的微藻生物质进行土壤施肥不会导致溶解性宏量营养元素和微量元素的额外沥滤。

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2024-08-02 DOI: 10.1002/jeq2.20613

Harald Weigand, Hermann Velten, Rolf-Alexander Düring, Peter Chifflard, Marcus Rohnke, Timo Weintraut, Steffen Heusch, Ulf Theilen

{"title":"Soil fertilization with microalgae biomass from municipal wastewater treatment causes no additional leaching of dissolved macronutrients and trace elements in a column experiment","authors":"Harald Weigand, Hermann Velten, Rolf-Alexander Düring, Peter Chifflard, Marcus Rohnke, Timo Weintraut, Steffen Heusch, Ulf Theilen","doi":"10.1002/jeq2.20613","DOIUrl":"10.1002/jeq2.20613","url":null,"abstract":"Microalgae are a promising bio-fertilizer that can be cultivated in municipal wastewater, where the organisms perform water purification by incorporation of nutrients and contaminants. Before bio-fertilization with wastewater-grown microalgae can be put into practice, its impact on the leaching of macronutrients and trace elements needs to be evaluated. Here, we studied the leaching behavior of a microalgae-fertilized soil against a control in column percolation setup. Microalgae were grown in real municipal wastewater supplemented with bromide for the analysis of within-cell Br− accumulation by time-of-flight secondary ion mass spectrometry. Dry biomass (45.0 g N kg−1 and 28.9 g P kg−1) was added to the topmost layer of the fertilized column at a level of 3 g biomass kg−1 on a whole soil basis. Column irrigation was equivalent to 3 years of precipitation in central Germany. The leaching of macronutrients and trace elements from the fertilized and control columns was largely identical. Except for P, depth profiles confirmed very low vertical translocation within the soil. This is held for total element contents as well as for operationally defined pools, suggesting that microalgae cultivated in municipal wastewater provide a slow-release fertilizer largely resistant to leaching. Mass spectrometric imaging gave clear evidence for bromide uptake by the microalgae, and pure cultures of the genus Scenedesmus showed that it was preferentially located in the cell membrane. Therefore, bromide could potentially be employed as a mineralization tracer in future studies on the use of microalgae as a bio-fertilizer.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jeq2.20613","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141874990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0