Water, Air, & Soil Pollution最新文献

{"title":"Use of Exploratory Analysis for Recommendation of Seed Priming with Hydrogen Peroxide on Lettuce and Arugula Cultivated with Brackish Water","authors":"Petterson Costa Conceição Silva,&nbsp;Hans Raj Gheyi,&nbsp;Mairton Gomes da Silva,&nbsp;Martha Jaqueline Santos de Jesus,&nbsp;André Dias de Azevedo Neto","doi":"10.1007/s11270-023-06664-3","DOIUrl":"10.1007/s11270-023-06664-3","url":null,"abstract":"<div><p>Hydrogen peroxide (H₂O₂) can act as a metabolic signal and induce increased tolerance of plants to various stresses. However, its use strategy and responsiveness may vary according to the species studied. Thus, this study aimed to evaluate the responses of lettuce and arugula crops to the use of H₂O₂ applied via seed with different strategies and to establish a recommendation for the use of this chemical conditioner to increase the tolerance of the studied crops. The seeds of both species were subjected to pretreatment with H₂O₂ at three concentrations (0.1, 1, and 10 mM) combined with three periods of exposure to H₂O₂ (12, 24, and 36 h) and, after this period, were subjected to salt stress of 50 mM NaCl in a hydroponic cultivation system. Additionally, two reference treatments were added: control (absence of H₂O₂ and absence of NaCl) and salt control (absence of H₂O₂ and 50 mM of NaCl). Our results showed that lettuce was more sensitive to salt stress than arugula. However, in general, the response to priming with H₂O₂ was less pronounced in arugula plants, suggesting that the increase in tolerance induced by the use of H₂O₂ in different plant species is associated with the genotypic characteristics of the species. For lettuce, the doses of 0.1 mM H₂O₂ (12 h) and 1 mM H₂O₂ (36 h) showed the best results of growth, while for arugula the best doses were 0.1 mM H₂O₂ (12 h) and 10 mM H₂O₂ (36 h).</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"234 11","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11270-023-06664-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41229300","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}

{"title":"Nanotechnology: an Integrated Approach Towards Agriculture Production and Environmental Stress Tolerance in Plants","authors":"Izhar Ullah,&nbsp;Muhammad Danish Toor,&nbsp;Abdul Basit,&nbsp;Heba I. Mohamed,&nbsp;Mohammed Gamal,&nbsp;Nouraiz Ahmed Tanveer,&nbsp;Syed Tanveer Shah","doi":"10.1007/s11270-023-06675-0","DOIUrl":"10.1007/s11270-023-06675-0","url":null,"abstract":"<div><p>Nanotechnology is a new approach to enhancing the agriculture sector by offering new strategies for fostering tolerance against different stresses and boosting output. Abiotic stresses, especially drought and salinity, are the foremost constraints that may severely affect plant growth and crop production, posing a direct threat to the food supply required to meet the increasing demands of the growing global population. The use of nanotechnology is a step towards a modernized agriculture system that has revealed the promising role of nanoparticles (NPs) in improving the growth of plants and the development of different abiotic stress tolerances by increasing hormonal production and photosynthesis pigments and reducing oxidative stress by activating antioxidant enzymes. Salinity and drought stress trigger a variety of morphological, physiological, biochemical, and molecular alterations that have a negative impact on a number of metabolic processes related to plant growth and productivity. NPs enter the plant system by several routes, mainly through roots and leaves, and interact with plants at cellular and subcellular levels, promoting changes in morphological, biochemical, physiological, and molecular states. Contamination with heavy metals (HM) is a major issue that hinders crop production and threatens food security. Outside the soil, foliar spraying is another better way to improve plant resistance to HM. Nutrient intake can be increased by applying nanofertilizer, which ultimately reduces nutrient losses, improves crop quality and yield, and reduces environmental degradation risk. Nanoparticulate fertilizer contains other NPs, such as cerium NPs, silicon NPs, carbon NPs, and titanium dioxide, that promote plant growth. The review aimed to examine the penetration and transport of nanoparticles in plants in order to comprehend the potential advantages of using nanotechnology in agriculture. Our study focused on presenting the effects of stress conditions on plants, their responses to such conditions, and the nano-based abiotic-mediated mechanisms of plants. Additionally, we also explored the physiochemical characteristics of nano-based metal oxide applications for improving agricultural systems.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"234 11","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11270-023-06675-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41229301","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}

{"title":"Characterization and Ecological Risk Assessment of Toxic Metal Contaminants in the Soil Around the Coal Gangue Hill in Huainan, Central China","authors":"Mu You,&nbsp;Yunhu Hu,&nbsp;Zhuihui Wang,&nbsp;Wentie Zhang","doi":"10.1007/s11270-023-06658-1","DOIUrl":"10.1007/s11270-023-06658-1","url":null,"abstract":"<div><p>To better understand the toxic metal pollution caused by coal mining activities, the concentrations of Ni, Zn, Cr, Cd, Cu, As and Pb in the soil around the coal gangue hill in a coal mine area of Huainan, China were measured, the soil pollution degree was assessed with the single factor index, Nemerow pollution index and potential ecological hazard index method. The descending order of the average concentration is Cr &gt; Zn &gt; As &gt; Ni &gt; Cu &gt; Pb &gt; Cd. The concentrations of toxic metal contaminants in the soil showed distinct spatial distribution differences in different wind directions. The pollution degree is followed the order of downwind direction &gt; upwind direction &gt; control point. The values of Nemerow index and potential ecological risk index are different among different directions and different distances from the coal gangue hill. The ecological risk of toxic metal contaminants in the soil around the mining area in the upwind and downwind directions belonged to slight, Cd and As posing a higher ecological risk than the other elements. Results revealed that the wind direction is important for the distribution of toxic metal contaminants around the coal gangue hill. This study can be used as a scientific reference for the prevention and control of pollution caused by toxic metal contaminants in mining area soil.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"234 11","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41228783","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}

{"title":"Stability Mechanism of Hexavalent Chromium Reduction by Nano-zerovalent Iron Under Different Environments","authors":"Xingle Chai,&nbsp;Xingzi Qin,&nbsp;Xinyi Gu,&nbsp;Caiyuan Ling,&nbsp;Dintian Lu,&nbsp;Chaolan Zhang","doi":"10.1007/s11270-023-06606-z","DOIUrl":"10.1007/s11270-023-06606-z","url":null,"abstract":"<div><p>Nanoscale zero-valent iron (NZVI) has a promising application in the remediation of hexavalent chromium in aqueous environments, but its stability in the remediation environment has rarely been investigated. In this study, firstly, natural NZVI(N-NZVI) and sodium alginate–modified NZVI (S-NZVI) were used to reduce hexavalent chromium in water. The results revealed that S-NZVI showed the highest removal rate of Cr(VI) under the same conditions. Then, X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) were used to characterize the reduced solid product (Cr-NZVI), which proved to be composed of chromite, chromferide, maghemite, magnetite, hematite, and lepidocrocite. To evaluate the stability and associated risks of Cr-NZVI, this study also simulated the corrosive effects of Cr-NZVI under different environments. The results found that natural ageing (0–60 days) had only a minor effect on the stability of the reduced product. However, the structure of the reduction products may be damaged under strong acidic conditions and in the presence of large amounts of SiO₃²⁻, HPO₄²⁻, Al³⁺, Co²⁺, organic acids (humic acid (HA), citric acid (CA), diethylenetriaminepentaacetic acid (DTPA), and oxalic acid (OA)) and H₂O₂. Organic acids showed significant effects (<i>p</i> &lt; 0.001), especially 0.5 M CA dissolved 90% of the iron and 50% of the chromium in the reduction products. Thus, our results suggest that hexavalent chromium reduced with NZVI cannot be left without attention and that its stability in the environment and possible safety issues are of concern.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"234 10","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11270-023-06606-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6727372","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}

{"title":"Biochar from Sugarcane Straw Reduces the Toxicity of Soils Contaminated with 2,4-D and Fipronil, Isolated and in a Mixture, on Multispecies Microcosms","authors":"David Silva Alexandre,&nbsp;Allan Pretti Ogura,&nbsp;Thandy Junio da Silva Pinto,&nbsp;Matheus Bortolanza Soares,&nbsp;Luís Reynaldo Ferracciú Alleoni,&nbsp;Cassiana Carolina Montagner,&nbsp;Telma de Oliveira Zacharias,&nbsp;Mariana Amaral Dias,&nbsp;Evaldo Luiz Gaeta Espíndola","doi":"10.1007/s11270-023-06629-6","DOIUrl":"10.1007/s11270-023-06629-6","url":null,"abstract":"<div><p>The intensive use of pesticides causes harmful effects on ecosystems, and remediation techniques can reduce the ecotoxicity of contaminated soils. Sugarcane straw is a feasible feedstock for biochar production, and it is abundant in the ethanol industry. In this sense, this study assessed the application of biochar from sugarcane straw to reduce the ecotoxicity of soils contaminated with the pesticides fipronil and 2,4-D, alone and in a mixture. Tests at the microcosm level (28 days) evaluated the influence of biochar on the terrestrial worm <i>Enchytraeus crypticus</i> and the eudicot plant <i>Eruca sativa</i> L. At the end of the experiment, elutriate solutions were prepared with soil samples to assess responses on <i>E. sativa</i> and on the cladoceran <i>Daphnia similis</i>. Fipronil and 2,4-D decreased the reproduction of <i>E. crypticus</i> in microcosms, particularly on treatments with fipronil. Biochar reduced the ecotoxicity of fipronil in soils, increasing the reproduction of <i>E. crypticus</i> by 43% compared with soils without biochar. However, the control with biochar showed a reproduction reduction of 23% when compared with the control without biochar. In soils with 2,4-D<i>,</i> the germination rates and shoot growth of <i>E. sativa</i> were 2 times greater in biochar-remediated soils compared with untreated soils. Considering the exposure to elutriate, the application of biochar in soils with 2,4-D improved the growth (by 45%) and germination (by 34%) of <i>E. sativa</i>. No effects were identified on <i>D. similis</i> at any exposure scenario. Therefore, sugarcane straw biochar can be a viable alternative for reducing the ecotoxicity of pesticides in soils.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"234 10","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11270-023-06629-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6727389","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}

{"title":"Microplastics in Indian Brackish Water Lagoon: Occurrence and Distribution in the Chilika Lake","authors":"Nisha Singh,&nbsp;Arijit Mondal,&nbsp;G Abhinav,&nbsp;PV Nagamani,&nbsp;Gopala Krishna Darbha","doi":"10.1007/s11270-023-06627-8","DOIUrl":"10.1007/s11270-023-06627-8","url":null,"abstract":"<div><p>Microplastics have become a serious concern in the contemporary world due to their widespread and hazardous nature. This study investigates microplastic distribution in one of the largest brackish water lagoons in the world (Chilika Lake, India) to bridge the knowledge gap in a transitional environment. Sediment and water samples were investigated to estimate microplastic count and were categorized based on their shape, color, size, and polymer type. The overall abundance of microplastic in sediment and water sample from Chilika Lake varied from 25.2 ± 9.8 items/kg to 7 ± 2.2 items/kg and 110.7 ± 35.6 items/100L to 26 ± 8.1 items/100L, respectively. Anthropogenic activities such as extensive fishing activities and tourism were attributed to be the major source of microplastic besides upstream loads through inflowing rivers. Fragments and foams were the most commonly occurring microplastic shapes in sediment and water samples, respectively. Sediment samples were found to be highly abundant in microplastic particle size &lt;1 mm. Water samples were dominated by white-color foams in 2–5 mm size range of microplastics. Ten different types of microplastic polymers were identified, of which polypropylene and polystyrene were the most dominant microplastic in sediment and water samples. Microplastic morphology showed surface features that can be attributed to their weathering. The study provides baseline information on microplastics in Chilika Lake to develop an insight into the associated environmental and health risks.</p><h3>Graphical abstract</h3>\u0000 <figure><div><div><div><picture><source><img></source></picture></div></div></div></figure>\u0000 </div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"234 10","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6727390","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}

{"title":"Adsorption Characteristics and Mechanisms of Oxytetracycline on Nano Biochar: Effects of Environmental Conditions and Particle Aggregation","authors":"Wenqiang Jia,&nbsp;Xiangrui Pan,&nbsp;Jiaying Song,&nbsp;Jian Wang,&nbsp;Weikai Sun,&nbsp;Yanjun Xin,&nbsp;Qinghua Yan,&nbsp;Chengzhi Zhou,&nbsp;Hao Zheng,&nbsp;Guocheng Liu","doi":"10.1007/s11270-023-06633-w","DOIUrl":"10.1007/s11270-023-06633-w","url":null,"abstract":"<div><p>Physical disintegration of macro biochars in natural environments produces nano biochars, thus affecting environmental processes (e.g., adsorption, migration) of antibiotic contaminants. However, knowledge about the relationships between adsorption behaviors of antibiotics and unique physicochemical colloidal properties of nano biochar are relatively limited. In this study, a nano biochar (NSD700) was prepared from sawdust-derived biochar (SD700) by a combination method of ball milling, sonication, and centrifugation to contrastively investigate their adsorption for oxytetracycline (OTC). NSD700 had similar chemical structure properties of carbon fraction with SD700, whereas NSD700 possessed greater surface area and porosity. The maximal sorption capacity of OTC on NSD700 was 30.7 mg/g, ~3 times greater than that of SD700 (10.4 mg/g), primarily benefiting from more exposed surfaces and pores. OTC adsorption on NSD700 was inhibited under acidic and alkaline condition, and the inhibiting effect was more significant in comparison with that on SD700. OTC sorption onto NSD700 gradually decreased with increasing concentration of Na⁺, but was not observed for SD700. Aggregation kinetic of NSD700 varying with Na⁺ concentration demonstrated that the inhibiting effect might be affiliated with the destabilization and aggregation of NSD700, which could obstruct adsorption sites. This study provided insights for antibiotic adsorption characteristics on nano biochar and will help understanding the process and fate of antibiotics in the biochar-remediated environment.</p><h3>Graphical Abstract</h3>\u0000 <figure><div><div><div><picture><source><img></source></picture></div></div></div></figure>\u0000 </div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"234 10","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11270-023-06633-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6727371","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}

{"title":"The effects of exogenous organic matter addition on bioaccessibility, adsorption kinetics and fractionation of antimony in soils","authors":"Saeed Bagherifam,&nbsp;Trevor C. Brown,&nbsp;Ravi Naidu,&nbsp;Eric D. van Hullebusch","doi":"10.1007/s11270-023-06607-y","DOIUrl":"10.1007/s11270-023-06607-y","url":null,"abstract":"<div><p>Organic matter (OM) plays a pivotal role in adsorptive behavior, speciation, and bioavailability of nutrients and metal(loids) in soils. However, the effects of OM on adsorption, fractionation, and bioavailability of antimony (Sb) in soils is largely unknown. In this study, the effects of two types of exogenous OM, including humic acid (HA) and fulvic acid (FA), on Sb bioavailability were compared in soils spiked with 1000 mg Sb kg^-1 and incubated for 3 months under constant conditions. Treated soils were then subjected to single and sequential extractions using a Simplified Bioaccessibility Extraction Test (SBET) and BCR fractionation method as well as kinetic and desorption tests. Furthermore, SEM-EDX elemental maps of antimony were studies to better understand the distribution of antimony and its associations with soil elements. The kinetic data for amended and unamended soils fitted well with the pseudo-second order model, demonstrating that chemisorption might be the rate determining step. Bioaccessibility of antimony increased up to 65% in HA soils and OM additions increased acid-soluble fraction of Sb by approximately 40% (HA) and 75% (FA), compared to the control soils. OM amendments remarkably increased desorption of Sb from soils, whereas the maximum uptake capacity of Sb reduced in OM treated soils. The residual fraction accounted for 92% of total Sb in experimental soils, which was shifted to more labile fractions after OM amendments. The results of this research revealed that OM addition can greatly affect the bioaccessibility, distribution pattern and adsorption of Sb in Sb-impacted soils.</p><h3>Graphical abstract</h3>\u0000 <figure><div><div><div><picture><source><img></source></picture></div></div></div></figure>\u0000 </div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"234 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11270-023-06607-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4882754","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}

{"title":"Adsorption of Tylosin and Tetracycline onto Microplastics: Behavior and Effects of Adsorbents and Salinity","authors":"Bo Zu,&nbsp;Wang Li,&nbsp;Lisha Lan,&nbsp;Yiwei Liu,&nbsp;Yangyang Zhang,&nbsp;Jiawen Li,&nbsp;Xueyu Mei","doi":"10.1007/s11270-023-06609-w","DOIUrl":"10.1007/s11270-023-06609-w","url":null,"abstract":"<div><p>Microplastic pollution is becoming one of the most severe threats to the entire earth surface ecosystem; moreover, it has the potential to act as a carrier for other chemical pollutants, introducing these pollutants in diverse environments. To evaluate this threat, this study investigated the adsorption of two antibiotics, tylosin (TYL) and tetracycline (TC), onto three common environmental microplastics, polyethylene (PE), polystyrene (PS), and polyvinyl chloride (PVC), through batch adsorption experiments. Overall, the Freundlich model fitted the isothermal adsorption well, which indicated inhomogeneous distribution of adsorption sites involved in the adsorption. The fitted parameters indicated that the adsorption of TYL and TC onto PVC was highest relative to that onto the other two microplastics, which was attributed to the differences in functional groups and crystallinity of polymers. The adsorption efficiency decreased with increasing microplastic concentration. Owing to the salting-out effect, the increase in salinity promoted TYL adsorption onto the microplastics; salinity had no significant effect on TC adsorption onto microplastics. The results suggest that microplastics can be carriers of antibiotics in the environment, for which the physicochemical properties of microplastics and antibiotics as well as environmental factors are crucial influencing factors. This study further clarifies the adsorption mechanisms of contaminants onto microplastics under different environmental conditions.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"234 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11270-023-06609-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4883182","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}

{"title":"Thiocyanate Removal from Aqueous Solution by a Synthetic CoAl-Layered Double Hydroxide with Nitrate Intercalation","authors":"Jingmin Yan,&nbsp;Zhengchen Li,&nbsp;Xiang Liu,&nbsp;Peng Qian,&nbsp;Xikai Liu,&nbsp;Shufeng Ye","doi":"10.1007/s11270-023-06593-1","DOIUrl":"10.1007/s11270-023-06593-1","url":null,"abstract":"<div><p>In this work, CoAl-layered double hydroxide (CoAl-LDH) was synthesized by a facile one-step process and utilized as an adsorbent for the removal of thiocyanate (SCN⁻) from environmental water. The characterization results revealed that CoAl-LDH presents a homogeneous nanosized plate with intercalation of NO₃⁻ in the interlayer space. The main factors affecting the removal efficiencies were investigated, and results revealed that CoAl-LDH possessed high removal efficiencies for SCN⁻ and was suitable for a wide range of pH and ambient temperature conditions. Furthermore, the results of the mechanism analysis revealed that the mechanism of adsorption of SCN⁻ by CoAl-LDH mainly includes interlayer ion exchange, electrostatic interactions, and surface ligand exchange. Model fitting of the kinetic data showed that SCN⁻ sorption on CoAl-LDH followed the pseudo-second-order model and the removal rate of SCN⁻ could reach 91.4% with 10 min contact time. Freundlich adsorption isotherm model could describe the adsorption process most accurately, and the maximum adsorption values of SCN⁻ were 187 mg/g at 25℃ and pH 6.0. Meanwhile, the spent CoAl-LDH could be regenerated in Fe(NO₃)₃ solution and was reused up to four cycles. The overall results demonstrate that CoAl-LDH had a great application potential in the removal of SCN⁻ from aqueous solution.</p><h3>Graphical Abstract</h3>\u0000 <figure><div><div><div><picture><source><img></source></picture></div></div></div></figure>\u0000 </div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"234 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4885095","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}