Soil & Environmental Health最新文献

{"title":"Stabilization of As and Sb in contaminated acidic shooting range soil with apatite mine tailings: Challenge of co-contamination","authors":"Salla H. Venäläinen ,&nbsp;Aura Nousiainen ,&nbsp;Minna Silvennoinen ,&nbsp;Sanna Kanerva","doi":"10.1016/j.seh.2024.100124","DOIUrl":"10.1016/j.seh.2024.100124","url":null,"abstract":"<div><div>Differences in the behaviors of shot-derived metal Pb and metalloids Sb and As render the remediation of metal(loid)-contaminated shooting range soils challenging. Treatment methods that generally reduce Pb solubility may simultaneously increase Sb and As solubility due to pH changes and ion competition. We investigated the potential of tailings from phosphate mining, previously used to immobilize Pb, to stabilize acidic shooting range soil without incurring the risk of enhanced Sb and As solubility. In a 2.5-year field trial, the soil of a former shooting range, surface-treated with tailings consisting of phlogopite, carbonate minerals calcite and dolomite, and residues of apatite, displayed no evidence of increased Sb or As solubility. Results from a parallel laboratory-scale pot experiment, carried out with test soils from the field site, supported the findings. Under acidic conditions, dissolution of the carbonate fraction of the tailings, and the subsequent decrease in soil acidity, contributed to the release of Sb and As from organic associations and/or Al/ Fe (hydr)oxide surfaces. We concluded that the abundant Ca²⁺ ions liberated upon carbonate dissolution probably reacted with the anionic species of Sb and As to form sparingly soluble Ca-antimonates and Ca-arsenates. Moreover, the solubility of intrinsic and apatite-derived P in the test soils, initially hypothesized to compete for adsorption with Sb and As and thereby increase their solubility, also decreased after tailings treatment. In conclusion, Pb-contaminated shooting range soil was successfully stabilized with the tailings without increasing Sb or As solubility.</div></div>","PeriodicalId":94356,"journal":{"name":"Soil & Environmental Health","volume":"3 1","pages":"Article 100124"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Water-stable aggregation and organic matter stabilisation by native plant Acacia auriculiformis in an early Technosol eco-engineered from Fe-ore tailings","authors":"Zhen Li ,&nbsp;Songlin Wu ,&nbsp;Yunjia Liu ,&nbsp;Lars Thomsen ,&nbsp;Fang You ,&nbsp;Junjian Wang ,&nbsp;Yuanfang Huang ,&nbsp;Longbin Huang","doi":"10.1016/j.seh.2024.100115","DOIUrl":"10.1016/j.seh.2024.100115","url":null,"abstract":"<div><div>Ecological engineering of Fe-ore tailings into Technosols (or soil-like growth media) offers a promising way to rehabilitate tailings without resorting to natural topsoil from other places. Among key pedogenic processes, soil aggregate formation and organic matter (OM) stabilisation are critical to the development of sustainable Technosols. The colonisation of pioneer plant species highly adaptive to infertile soils and water deficit may act as competent biological drivers to enhance these critical processes involved in Technosol formation. This study aimed to investigate the role of an Australian native plant species, <em>Acacia auriculiformis</em>, in enhancing water-stable aggregate formation and associated OM stabilisation using a pot experiment under glasshouse conditions. The influences of two relevant abiotic processes, including water deficit and phosphorus deficiency, on these key processes were evaluated. <em>A. auriculiformis</em> colonisation enhanced the formation of water-stable aggregates in the early Technosols, while the proportion of macroaggregates and microaggregates were altered differently, with the former increasing under well-watered conditions and the latter increasing under water deficit conditions. <em>A</em>. <em>auriculiformis</em> colonisation increased N-rich mineral-associated OM within the macroaggregates. In aggregates, OM stabilisation was related to interactions of carboxyl-rich organic groups with tailing minerals. The influences of water deficit and phosphorus deficiency on aggregate formation and OM stabilisation were mediated via their impacts on the growth and root functions of <em>A</em>. <em>auriculiformis</em>, including root extension, entanglement, and exudation. From these findings, the utilisation of <em>A. auriculiformis</em> is recommended as a biological driver to facilitate the development of early Technosols from eco-engineered Fe-ore tailings.</div></div>","PeriodicalId":94356,"journal":{"name":"Soil & Environmental Health","volume":"2 4","pages":"Article 100115"},"PeriodicalIF":0.0,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of pyrolysis temperature on the photooxidation of water-soluble fraction of wheat straw biochar based on 21 ​T FT-ICR mass spectrometry","authors":"Amy M. McKenna ,&nbsp;Martha L. Chacón-Patiño ,&nbsp;Holly K. Roth ,&nbsp;William Bahureksa ,&nbsp;Robert B. Young ,&nbsp;James A. Ippolito ,&nbsp;Yan Xin ,&nbsp;Thomas Borch ,&nbsp;Antony J. Williams ,&nbsp;Huan Chen","doi":"10.1016/j.seh.2024.100114","DOIUrl":"10.1016/j.seh.2024.100114","url":null,"abstract":"<div><div>Biochar, formed through the pyrolysis or burning of organic wastes, has a complex chemical composition influenced by feedstock, pyrolysis temperature, and reaction conditions. Water-soluble, dissolved black carbon species released from biochar comprise one of the most photoreactive organic matter fractions. Photodegradation of these water-soluble species from wheat straw biochar, produced at different pyrolysis temperatures in laboratory microcosms, resulted in noticeable compositional differences. This study characterized water-soluble transformation products formed through the photodegradation of wheat straw biochar pyrolyzed at 300, 400, 500, or 600°C by electrospray ionization 21 ​T Fourier transform ion cyclotron resonance mass spectrometry (21T FT-ICR MS). We also evaluated global trends in the toxicity of these water-soluble fractions using MicroTox™ to assess the impacts of pyrolysis temperature. Additionally, we examined biochar surface morphology after photodegradation and observed minimal change after irradiation for 48 ​h, though the total yield of water-soluble biochar species varied with pyrolysis temperature. Trends in toxicity observed from MicroTox® analysis reveal that water-soluble photoproducts from biochar produced at 300°C and 900°C are nearly three times as toxic compared to dark controls. The ultrahigh resolving power of 21T FT-ICR MS allows for the separation of tens of thousands of highly oxidized, low-molecular-weight (&lt;1 ​kDa) species, showing that photoproducts span a wider range of H/C and O/C ratios compared to their dark analogs. This study highlights the impacts of photodegradation on the molecular composition of water-soluble biochar species and underscores the influence of pyrolysis temperature on the quantity and composition of dissolved organic species.</div></div>","PeriodicalId":94356,"journal":{"name":"Soil & Environmental Health","volume":"2 4","pages":"Article 100114"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142442489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In-situ prediction of soil organic carbon contents in wheat-rice rotation fields via visible near-infrared spectroscopy","authors":"Lingju Dai ,&nbsp;Jie Xue ,&nbsp;Rui Lu ,&nbsp;Zheng Wang ,&nbsp;Zhongxing Chen ,&nbsp;Qiangyi Yu ,&nbsp;Zhou Shi ,&nbsp;Songchao Chen","doi":"10.1016/j.seh.2024.100113","DOIUrl":"10.1016/j.seh.2024.100113","url":null,"abstract":"<div><div>Visible near-infrared (VNIR) spectroscopy is a reliable method for estimating soil properties. However, its effectiveness in accurately predicting soil organic carbon (SOC) contents, particularly in wheat-rice rotation fields, remains uncertain. In this study, we collected 202 samples from wheat-rice fields (0–20 ​cm) in southeastern China and measured <em>in-situ</em> spectra of the vertical surface of the soil cores and the laboratory spectra of the dried and sieved soil samples. Our study focused on evaluating three algorithms - external parameter orthogonalization (EPO), direct standardization (DS), and piecewise direct standardization (PDS) - to address the influence of external factors, particularly soil moisture. To carry out our analysis, the dataset was divided into calibration (141 samples) and validation (61 samples) sets via the Kennard-Stone algorithm. A subset of the corresponding <em>in-situ</em> and laboratory spectra in the calibration set (transfer set) was used to derive the transfer matrix for EPO, DS, and PDS, enabling the conversion of <em>in-situ</em> spectra to laboratory spectra by characterizing their differences. Four machine learning models, including cubist, partial least squares regression (PLSR), random forest (RF), and memory-based learning (MBL), were used to predict the SOC, particulate organic carbon (POC), and mineral-associated organic carbon (MAOC) contents based on the laboratory, <em>in-situ</em>, and corrected <em>in-situ</em> spectra. The results revealed that the laboratory spectra outperformed the non-corrected <em>in-situ</em> spectra, with coefficients of determination (R²) of 0.91, 0.75, and 0.80 for SOC, POC, and MAOC, respectively. Among the models, MBL and PLSR exhibited the highest average R² at 0.85–0.86. EPO marginally improved the prediction accuracy (R² increased from 0.85 to 0.87 for SOC, 0.64 to 0.69 for POC, and 0.75 to 0.82 for MAOC). These promising prediction accuracies underscore the potential of VNIR spectra for <em>in-situ</em> predictions in wheat-rice fields in Southeast China, offering insights for predicting SOC contents via <em>in-situ</em> spectroscopy.</div></div>","PeriodicalId":94356,"journal":{"name":"Soil & Environmental Health","volume":"2 4","pages":"Article 100113"},"PeriodicalIF":0.0,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142442490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The potential of phosphate mine tailings in the remediation of acidic Pb-contaminated soil","authors":"Salla H. Venäläinen ,&nbsp;Aura Nousiainen ,&nbsp;Sanna Kanerva","doi":"10.1016/j.seh.2024.100112","DOIUrl":"10.1016/j.seh.2024.100112","url":null,"abstract":"<div><p>We investigated the potential of tailings from phosphate mining, consisting of phlogopite, carbonate minerals calcite and dolomite, and residues of apatite, to serve as a stabilizing agent in the remediation of Pb-contaminated soil <em>in situ</em> or on-site. In a 2.5-year field trial, test plots located in a former shooting range area were surface-treated with the tailings and analyzed for tailings-induced changes in Pb solubility and thus potential mobility within the soil profile. The factors and mechanisms controlling tailings-induced changes in Pb solubility in various soil types, and the susceptibility of Pb to leaching down the soil profile following the treatment, were investigated in supplementary laboratory-scale experiments carried out with horizon-specific soil samples collected from the field site. In the tailings-treated soil, the dissolution of the carbonate fraction of the tailings and the subsequent increase in soil pH contributed to the displacement of shot-derived Pb²⁺ ions by the carbonate-derived calcium ions (Ca²⁺) and the adsorption of Pb²⁺ by soil organic matter and Al, Fe, and Mn (hydr)oxide surfaces. Moreover, the apatite fraction of the tailings formed poorly-soluble compounds with Pb, particularly in soils high in exchangeable Pb²⁺ with respect to their cation exchange capacity. Consequently, the Pb solubility in tailings-treated soils substantially decreased. The reduction in Pb solubility was most evident in the organic topsoil high in Pb. Despite the liming effect of the tailings, and the susceptibility of Pb to form organic complexes conducive to solubilization upon an increase in pH, we found no evidence of tailings-induced leaching of Pb down the soil profile.</p></div>","PeriodicalId":94356,"journal":{"name":"Soil & Environmental Health","volume":"2 4","pages":"Article 100112"},"PeriodicalIF":0.0,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949919424000554/pdfft?md5=2d0368c5657cabf7a34b8cb7260b96a6&pid=1-s2.0-S2949919424000554-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142099166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fortifying casein phosphopeptides and Ca in wheat reduces the As, Cd, and Pb bioavailability based on a mouse model: Calcium and phosphate transporters and gut microbiota","authors":"Sheng-Zhi Chen ,&nbsp;Xin-Ying Lin ,&nbsp;Rong-Yue Xue ,&nbsp;Xu Duan ,&nbsp;Dong-Mei Zhou ,&nbsp;Lena Q. Ma ,&nbsp;Hong-Bo Li","doi":"10.1016/j.seh.2024.100111","DOIUrl":"10.1016/j.seh.2024.100111","url":null,"abstract":"<div><p>Reducing the oral bioavailability of metal contaminants including As, Cd, , and Pb in foods can protect human health. Studies showed reduced metal bioavailability with elevated Ca and Fe intake; however, the effectiveness of enhancing food Ca and Fe bioavailability remains unknown. Based on a mouse bioassay and using metal accumulation in mouse tissues (kidneys and liver) as the bioavailability endpoint, this study investigated the roles of casein phosphopeptides (CPP, food nutrition fortifier) in lowering the As, Cd, and Pb bioavailability from consuming a metal-contaminated wheat. The CPP amendment at 0.10–0.50% in wheat promoted its Ca bioavailability, causing 33–62% and 59–80% decreases in the gene expression encoding for duodenal Ca and phosphate transporters in mice. This limited transcellular transport of Cd²⁺ and inorganic arsenate via Ca and phosphate transporters respectively, thus leading to 27% and 34% decreases in Cd and As contents in mouse kidneys fed with wheat at 0.50% CPP amendment. In addition, CPP promoted the colonization of <em>Feacalibaculum</em> and <em>Bifidobacterium</em> in mouse gut, likely promoting As excretion in feces by 81–112%. In contrast to As, and Cd, CPP failed to reduce Pb contents in mouse tissue after consuming CPP-amended wheat, probably by elevating wheat-Pb solubility in the intestinal fluid by 48–136%. However, co-amendment of 0.30% CPP and 500 ​μg ​g⁻¹ Ca as Ca gluconate lowered the As, Cd, and Pb contents in mouse kidneys by 38–71%. The data indicate that fortifying Ca together with CPP in wheat can reduce human exposure to multi-metals via dietary intake.</p></div>","PeriodicalId":94356,"journal":{"name":"Soil & Environmental Health","volume":"2 4","pages":"Article 100111"},"PeriodicalIF":0.0,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949919424000542/pdfft?md5=ca34c08264b1ae06deaa156e09a31b74&pid=1-s2.0-S2949919424000542-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142148523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Selenium contents, speciation and bioaccessibility of Se-enriched rice grains from Chinese markets” [Soil Environ. Health 1 (2023) 100037]","authors":"Jing-Yu Zeng ,&nbsp;Dong-Xing Guan ,&nbsp;Zhi-Hua Dai ,&nbsp;Jia-Yi Chen ,&nbsp;Wen-Jie Dong ,&nbsp;Song Ding ,&nbsp;Lena Q. Ma","doi":"10.1016/j.seh.2024.100098","DOIUrl":"10.1016/j.seh.2024.100098","url":null,"abstract":"","PeriodicalId":94356,"journal":{"name":"Soil & Environmental Health","volume":"2 3","pages":"Article 100098"},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949919424000414/pdfft?md5=09bbdb4857a829a0495adeb2358e0704&pid=1-s2.0-S2949919424000414-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141841333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using visible-near infrared spectroscopy to estimate whole-profile soil organic carbon and its fractions","authors":"Mingxuan Qi ,&nbsp;Songchao Chen ,&nbsp;Yuchen Wei ,&nbsp;Hangxin Zhou ,&nbsp;Shuai Zhang ,&nbsp;Mingming Wang ,&nbsp;Jinyang Zheng ,&nbsp;Raphael A. Viscarra Rossel ,&nbsp;Jinfeng Chang ,&nbsp;Zhou Shi ,&nbsp;Zhongkui Luo","doi":"10.1016/j.seh.2024.100100","DOIUrl":"10.1016/j.seh.2024.100100","url":null,"abstract":"<div><p>Soil organic carbon (SOC) is crucial for soil health and quality, and its sequestration has been suggested as a natural solution to climate change. Accurate and cost-efficient determination of SOC and its functional fractions is essential for effective SOC management. Visible near-infrared spectroscopy (vis-NIR) has emerged as a cost-efficient approach. However, its ability to predict whole-profile SOC content and its fractions has rarely been assessed. Here, we measured SOC and its two functional fractions, particulate (POC) and mineral-associated organic carbon (MAOC), down to a depth of 200 ​cm in seven sequential layers across 183 dryland cropping fields in northwest, southwest, and south China. Then, vis-NIR spectra of the soil samples were collected to train a machine learning model (partial least squares regression) to predict SOC, POC, MAOC, and the ratio of MAOC to SOC (MAOC/SOC – an index of carbon vulnerability). We found that the accuracy of the model indicated by the determination coefficient of validation (R_val²) is 0.39, 0.30, 0.49, and 0.48 for SOC, POC, MAOC, and MAOC/SOC, respectively. Incorporating mean annual temperature improved model performance, and R_val² was increased to 0.64, 0.31, 0.63, and 0.51 for the four carbon variables, respectively. Further incorporating SOC into the model increased R_val² to 0.82, 0.64, and 0.59, respectively. These results suggest that combining vis-NIR spectroscopy with readily-available climate data and total SOC measurements enables fast and accurate estimation of whole-profile POC and MAOC across diverse environmental conditions, facilitating reliable prediction of whole-profile SOC dynamics over large spatial extents.</p></div>","PeriodicalId":94356,"journal":{"name":"Soil & Environmental Health","volume":"2 3","pages":"Article 100100"},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949919424000438/pdfft?md5=aaab9f30a0ddc715bf07d6633cc27f8d&pid=1-s2.0-S2949919424000438-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141849142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nitrous oxide fluxes during a winter cover crop season in a Mississippi corn cropping system","authors":"Zihan Li ,&nbsp;Dana M. Miles ,&nbsp;Leah Hammons ,&nbsp;Frances A. Podrebarac ,&nbsp;John P. Brooks ,&nbsp;Ardeshir Adeli ,&nbsp;Renotta Smith ,&nbsp;Joby M. Prince Czarnecki ,&nbsp;Robert J. Moorhead ,&nbsp;Jing Hu","doi":"10.1016/j.seh.2024.100103","DOIUrl":"10.1016/j.seh.2024.100103","url":null,"abstract":"<div><p>Agroecosystems are the largest source of anthropogenic N₂O fluxes. While cover crops (CC) offer benefits for soil health, their impacts on greenhouse gas fluxes are inconsistent. In the southeastern US, where intensive agriculture and low CC adoption are prevalent, few studies have investigated CC impact on soil N₂O fluxes. Our study explored the effects of CC species and management practices on soil N₂O fluxes during the winter CC growing season in Mississippi, which was conducted in a non-tilled corn cropping system with seven CC treatments. We measured <em>in situ</em> soil N₂O fluxes, along with soil moisture and temperature, throughout the CC growing season from 2022 to 2023. Surface soil samples were also collected to analyze soil mineral nitrogen (N) content and enzyme activity. Over the study period (a total of 188 days), cumulative N₂O fluxes were 0.50–1.03 ​kg N₂O–N ha⁻¹, with the lowest values from the annually-rotated Elbon rye treatment and the highest from the annually-rotated Austrian winter pea. Our results show that both CC treatments and sampling time significantly affected soil N₂O fluxes. There was a strong positive correlation (r ​= ​0.34, <em>p</em> ​&lt; ​0.05) between N₂O fluxes and NO₃–N content, which was lowest under continuous rye and rotated-rye treatments (0.31 and 0.34 ​mg ​kg⁻¹ ). The results suggest that Elbon rye effectively reduced soil N₂O fluxes during this period by lowering the soil NO₃–N content, the primary substrate for denitrification. This study is one of the few studies to examine the impacts of cover crops on soil N₂O fluxes in cropping systems in the southeastern US, offering insights into the cover crop effects on soil N₂O fluxes during their growing season.</p></div>","PeriodicalId":94356,"journal":{"name":"Soil & Environmental Health","volume":"2 4","pages":"Article 100103"},"PeriodicalIF":0.0,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949919424000463/pdfft?md5=7211933d4ac9ea8b08cef2cc85482307&pid=1-s2.0-S2949919424000463-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141854013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Key factors and mechanisms of microplastics’ effects on soil nitrogen transformation: A review","authors":"Shutao Wang ,&nbsp;Wanqing Wang ,&nbsp;Sashuang Rong ,&nbsp;Guiming Liu ,&nbsp;Yuxin Li ,&nbsp;Xinxin Wang ,&nbsp;Wei Liu","doi":"10.1016/j.seh.2024.100101","DOIUrl":"10.1016/j.seh.2024.100101","url":null,"abstract":"<div><p>It is indisputable that microplastics (MPs) can profoundly alter nitrogen transformation in soil. However, it remains poorly understood how MPs impact soil nitrogen processes. This review systematically analyzed literature published in recent years related to the impact of MPs on nitrogen transformation. After reviewing the environmental behavior of MPs in soil media, the mechanisms of action and key factors of MPs’ effects on soil nitrogen transformation are elucidated. The size, shape, concentration, and type of MPs significantly alter nitrogen transformation. When MPs enter the soil, they can significantly affect the habitat and diversity of soil microorganisms and the transformation of soil nitrogen by adsorbing pollutants, releasing additives, and altering the physicochemical characteristics of the soil. As organic substrates, MPs can directly affect microbial community structure by promoting microbial colonization. Besides, MPs can also be toxic to soil microorganisms by coming into direct contact with cell surfaces. Microorganisms, key enzymes, and functional genes associated with nitrogen transformation respond to the presence of MPs, thereby affecting the nitrogen conversion process. At the last, measures to mitigate soil MPs contamination are suggested. The article highlights the effects of MPs on soil nitrogen transformation factors, leading to valuable insights into microbially-mediated nitrogen transformation processes in MP-contaminated soils. It offers useful information for determining nitrogen regulation and assessing ecological risks in soils contaminated by MPs.</p></div>","PeriodicalId":94356,"journal":{"name":"Soil & Environmental Health","volume":"2 4","pages":"Article 100101"},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S294991942400044X/pdfft?md5=757c0b443a9ac2a439dfa69b5f90211a&pid=1-s2.0-S294991942400044X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141845702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}