Next Sustainability最新文献

Review of starch-based coagulants for water treatment: Mechanisms, extraction and surface modification 用于水处理的淀粉基混凝剂综述：机理、提取和表面改性

Next Sustainability

Pub Date : 2024-10-16 DOI: 10.1016/j.nxsust.2024.100083

As the UN Sustainable Development Goal 6 emphasizes, sustainable and equitable access to clean water is paramount to improving public health and minimizing waterborne disease transmission. Due to rapid urbanization and population growth, freshwater resources are depleted, and approximately two-thirds of the world’s population will experience severe water scarcity by 2050. The coagulation-flocculation method demonstrates a viable solution for water treatment due to the minimal technical requirements, short treatment duration, and low material cost. Recently, starch-based coagulants have garnered significant attention due to their non-toxic nature, abundance, and cost-effectiveness. However, the coagulation efficiency of starch can be further enhanced through surface modification. The performance efficiency of starch-based coagulants largely depends on the modification technique, as it may influence the density of the surface charge. This review paper comprehensively discusses the coagulation mechanism of starch-based coagulants and the distinct methods for starch extraction. The removal efficacy of starch-based coagulants primarily depends on various physicochemical properties such as surface functional groups, zeta potential, and the elemental and morphological properties of the coagulant. Tailoring these properties is essential for developing a promising starch-based coagulant capable of effectively removing pollutants from water. Finally, the future prospects of starch-based coagulants are provided to highlight the exciting opportunities for sustainable water treatment and alignment with circular economy principles.

正如联合国可持续发展目标 6 所强调的那样，可持续和公平地获取清洁水对于改善公众健康和最大限度地减少水传播疾病至关重要。由于快速的城市化和人口增长，淡水资源已经枯竭，到 2050 年，全球约有三分之二的人口将面临严重的缺水问题。混凝絮凝法因其技术要求低、处理时间短、材料成本低而成为水处理的可行解决方案。最近，以淀粉为基础的混凝剂因其无毒性、丰富性和成本效益而备受关注。然而，淀粉的混凝效率可以通过表面改性得到进一步提高。淀粉基混凝剂的性能效率在很大程度上取决于改性技术，因为它可能会影响表面电荷的密度。本综述全面论述了淀粉基混凝剂的凝结机理和不同的淀粉提取方法。淀粉基混凝剂的去除效果主要取决于各种物理化学特性，如表面官能团、ZETA电位以及混凝剂的元素和形态特性。要开发出能有效去除水中污染物的淀粉基混凝剂，调整这些特性至关重要。最后，介绍了淀粉基混凝剂的未来前景，强调了可持续水处理和符合循环经济原则的令人兴奋的机遇。

{"title":"Review of starch-based coagulants for water treatment: Mechanisms, extraction and surface modification","authors":"","doi":"10.1016/j.nxsust.2024.100083","DOIUrl":"10.1016/j.nxsust.2024.100083","url":null,"abstract":"<div><div>As the UN Sustainable Development Goal 6 emphasizes, sustainable and equitable access to clean water is paramount to improving public health and minimizing waterborne disease transmission. Due to rapid urbanization and population growth, freshwater resources are depleted, and approximately two-thirds of the world’s population will experience severe water scarcity by 2050. The coagulation-flocculation method demonstrates a viable solution for water treatment due to the minimal technical requirements, short treatment duration, and low material cost. Recently, starch-based coagulants have garnered significant attention due to their non-toxic nature, abundance, and cost-effectiveness. However, the coagulation efficiency of starch can be further enhanced through surface modification. The performance efficiency of starch-based coagulants largely depends on the modification technique, as it may influence the density of the surface charge. This review paper comprehensively discusses the coagulation mechanism of starch-based coagulants and the distinct methods for starch extraction. The removal efficacy of starch-based coagulants primarily depends on various physicochemical properties such as surface functional groups, zeta potential, and the elemental and morphological properties of the coagulant. Tailoring these properties is essential for developing a promising starch-based coagulant capable of effectively removing pollutants from water. Finally, the future prospects of starch-based coagulants are provided to highlight the exciting opportunities for sustainable water treatment and alignment with circular economy principles.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142442332","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}

引用次数: 0

Use of EDS/EDX to evaluate heavy metals pollution in water sources 利用 EDS/EDX 评估水源中的重金属污染

Next Sustainability

Pub Date : 2024-10-16 DOI: 10.1016/j.nxsust.2024.100082

The objective of the study was to evaluate the role of brick kilns in contaminating water bodies with heavy metals in Punjab, India. The energy-dispersive x-ray spectroscopy (EDS/EDX) machine effectively tested heavy metals in water samples. The research revealed that the surface water near the brick kilns was extensively polluted with heavy metals. Their Pollution Load Index (PLI) values varied between 2.83 and 52.98, and their degree of contamination was “Progressive deterioration”. The PLI values for groundwater ranged between 0.089 and 3.68, and the degree of contamination varied from “Baseline levels of pollutants” to “Progressive deterioration”. In general, the groundwater of the studied area had a PLI value of 0.477 (Baseline levels of pollutants), whereas the surface water had a PLI value of 11.453 (Progressive deterioration). The Water Quality Index (WQI) of groundwater was highly influenced by heavy metals, notably Arsenic (As) from lithologic origins, and Lead (Pb) from the burning of fuels in the brick kilns. In descending order, Pb>Zn>As>Cr>Ni metals were influencing the PLI, and the correlation matrixes demonstrated that the presence of heavy metals was associated with the PLI and WQI values. Therefore, there is evidence that brick kilns are polluting water bodies with heavy metals. EDS proved to be one of the instruments to evaluate the chemical elements in water. It was recommended to enforce the law governing the use of biomass to reduce vast quantities of coal used in baking bricks.

研究的目的是评估砖窑在印度旁遮普邦水体重金属污染中的作用。能量色散 X 射线光谱仪（EDS/EDX）有效地检测了水样中的重金属。研究结果表明，砖窑附近的地表水广泛受到重金属污染。其污染负荷指数（PLI）值介于 2.83 和 52.98 之间，污染程度为 "逐渐恶化"。地下水的污染负荷指数值介于 0.089 和 3.68 之间，污染程度从 "污染物基线水平 "到 "逐步恶化 "不等。总体而言，研究区域地下水的 PLI 值为 0.477（污染物基准水平），而地表水的 PLI 值为 11.453（逐步恶化）。地下水的水质指数（WQI）受重金属影响很大，特别是来自岩层的砷（As）和来自砖窑燃料燃烧的铅（Pb）。从高到低的顺序依次是铅>锌>砷>铬>镍，相关矩阵表明，重金属的存在与 PLI 和 WQI 值相关。因此，有证据表明砖窑对水体造成了重金属污染。EDS 被证明是评估水中化学元素的仪器之一。建议执行关于使用生物质的法律，以减少烧砖时使用的大量煤炭。

{"title":"Use of EDS/EDX to evaluate heavy metals pollution in water sources","authors":"","doi":"10.1016/j.nxsust.2024.100082","DOIUrl":"10.1016/j.nxsust.2024.100082","url":null,"abstract":"<div><div>The objective of the study was to evaluate the role of brick kilns in contaminating water bodies with heavy metals in Punjab, India. The energy-dispersive x-ray spectroscopy (EDS/EDX) machine effectively tested heavy metals in water samples. The research revealed that the surface water near the brick kilns was extensively polluted with heavy metals. Their Pollution Load Index (PLI) values varied between 2.83 and 52.98, and their degree of contamination was “Progressive deterioration”. The PLI values for groundwater ranged between 0.089 and 3.68, and the degree of contamination varied from “Baseline levels of pollutants” to “Progressive deterioration”. In general, the groundwater of the studied area had a PLI value of 0.477 (Baseline levels of pollutants), whereas the surface water had a PLI value of 11.453 (Progressive deterioration). The Water Quality Index (WQI) of groundwater was highly influenced by heavy metals, notably Arsenic (As) from lithologic origins, and Lead (Pb) from the burning of fuels in the brick kilns. In descending order, Pb>Zn>As>Cr>Ni metals were influencing the PLI, and the correlation matrixes demonstrated that the presence of heavy metals was associated with the PLI and WQI values. Therefore, there is evidence that brick kilns are polluting water bodies with heavy metals. EDS proved to be one of the instruments to evaluate the chemical elements in water. It was recommended to enforce the law governing the use of biomass to reduce vast quantities of coal used in baking bricks.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142442333","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}

引用次数: 0

Incorporating industrial residue of submerged arc welding (SAW) in cement-based mortar matrices as a green strategy 将埋弧焊（SAW）的工业残留物作为一种绿色战略纳入水泥基砂浆基质中

Next Sustainability

Pub Date : 2024-10-11 DOI: 10.1016/j.nxsust.2024.100080

The construction industry, a key player in the fight against greenhouse gas emissions and solid waste generation, is actively seeking sustainable solutions to mitigate environmental impacts. This study investigates the technical feasibility of incorporating submerged arc slag, a byproduct rich in calcium and silicon oxides, into the mechanical properties of mortars. Three mixtures with a water/cement ratio of 1.4 were prepared: a reference mixture, one with the addition of 10 % slag, and another with 10 % cement replaced by slag. Compressive strength tests were carried out at 7, 14, and 28 days and revealed average losses of 12.4 %, 18.9 %, and 22.9 % in the mixture with replaced cement, while the mixture with slag addition showed lower losses of 2.6 %, 4.9 %, and 5.3 %. Although partial replacement of cement affects strength, levels remain within regulatory limits, and slag contributes to reducing CO₂ emissions, minimizes waste generation, and promotes the valorization of industrial byproducts. This study underscores the role of the construction industry in mitigating environmental impacts and the potential of submerged arc slag as a sustainable and effective alternative, balancing mechanical performance and environmental impact in civil construction.

建筑业是减少温室气体排放和固体废弃物产生的关键领域，它正在积极寻求可持续的解决方案，以减轻对环境的影响。本研究探讨了将富含钙和硅氧化物的副产品--浸没电弧炉渣掺入砂浆机械性能中的技术可行性。研究人员制备了三种水灰比为 1.4 的混合物：参考混合物、添加 10% 矿渣的混合物以及用矿渣替代 10% 水泥的混合物。在 7 天、14 天和 28 天时进行了抗压强度测试，结果显示，添加了替代水泥的混合物平均强度损失分别为 12.4%、18.9% 和 22.9%，而添加了矿渣的混合物强度损失较低，分别为 2.6%、4.9% 和 5.3%。虽然部分替代水泥会影响强度，但其水平仍在法规限制范围内，而且矿渣有助于减少二氧化碳排放，最大限度地减少废物产生，并促进工业副产品的价值化。这项研究强调了建筑行业在减轻环境影响方面的作用，以及埋弧炉渣作为一种可持续的有效替代品，在民用建筑中兼顾机械性能和环境影响的潜力。

{"title":"Incorporating industrial residue of submerged arc welding (SAW) in cement-based mortar matrices as a green strategy","authors":"","doi":"10.1016/j.nxsust.2024.100080","DOIUrl":"10.1016/j.nxsust.2024.100080","url":null,"abstract":"<div><div>The construction industry, a key player in the fight against greenhouse gas emissions and solid waste generation, is actively seeking sustainable solutions to mitigate environmental impacts. This study investigates the technical feasibility of incorporating submerged arc slag, a byproduct rich in calcium and silicon oxides, into the mechanical properties of mortars. Three mixtures with a water/cement ratio of 1.4 were prepared: a reference mixture, one with the addition of 10 % slag, and another with 10 % cement replaced by slag. Compressive strength tests were carried out at 7, 14, and 28 days and revealed average losses of 12.4 %, 18.9 %, and 22.9 % in the mixture with replaced cement, while the mixture with slag addition showed lower losses of 2.6 %, 4.9 %, and 5.3 %. Although partial replacement of cement affects strength, levels remain within regulatory limits, and slag contributes to reducing CO<sub>2</sub> emissions, minimizes waste generation, and promotes the valorization of industrial byproducts. This study underscores the role of the construction industry in mitigating environmental impacts and the potential of submerged arc slag as a sustainable and effective alternative, balancing mechanical performance and environmental impact in civil construction.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142416008","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}

引用次数: 0

Copper-catalyzed plastic waste synthesized graphene nanosheets/polypyrrole nanocomposites for efficient thermoelectric applications 铜催化塑料废弃物合成的石墨烯纳米片/聚吡咯纳米复合材料在热电领域的高效应用

Next Sustainability

Pub Date : 2024-10-09 DOI: 10.1016/j.nxsust.2024.100081

Presently, various catalysts have been reported for the synthesis of carbon nanomaterials from a variety of plastic waste, which needs to be removed at the end of the synthesis process by using chemical techniques and hence make the process more typical from the aspect of cost-benefit and circular economic aspects. Herewith, we report copper turnings as the cost-effective and greener catalytic templates for synthesizing highly conducting graphene nanosheets (GNs). The synthesis of the GNs from plastic waste was done as we previously reported in the steps of the pyrolytic process, where the copper turnings are used as catalytic templates in the present study. Because of the excellent catalytic efficiency towards breaking old carbon-carbon bonds and forming new carbon-carbon bonds, the copper turnings act as an excellent degradation catalyst and promote the growth of graphitic skeletons and, consequently, graphene nanosheets. The synthesized GNs showed a high conductivity of ∼ 1730 S/m. GNs thus synthesized is implemented for synthesizing GNs/polypyrrole nanocomposites, which is later investigated for the TE applications. The values of the Seebeck coefficient showed that the composite of GNs/polypyrrole performs as a p-type semiconductor. The TE figure of merit (ZT) for GNs/polypyrrole demonstrated good thermoelectric characteristics and showed a value of 3.75 × 10⁻⁶ at the temperature. Thus, the present method of synthesis of GNs showed a more convenient, industrial friendly technique for the production of plastic waste derived graphene nanosheets and its application for thermal energy conversion applications.

目前，已报道了利用各种塑料废弃物合成碳纳米材料的各种催化剂，这些废弃物需要在合成过程结束时利用化学技术去除，因此从成本效益和循环经济的角度来看，该过程更具典型性。在此，我们报告了铜转轮作为合成高导电性石墨烯纳米片（GNs）的成本效益更高的绿色催化模板。从塑料废弃物中合成石墨烯纳米片的方法与我们之前报道的热解工艺步骤相同，在本研究中使用铜转轮作为催化模板。由于铜转轮在断裂旧的碳-碳键和形成新的碳-碳键方面具有出色的催化效率，因此铜转轮可作为一种出色的降解催化剂，促进石墨骨架的生长，进而促进石墨烯纳米片的生长。合成的石墨烯具有高达 1730 S/m 的导电率。由此合成的 GNs 可用于合成 GNs/聚吡咯纳米复合材料，随后将研究其在 TE 中的应用。塞贝克系数的数值表明，GNs/聚吡咯复合材料具有 p 型半导体的性能。GNs/ 聚吡咯的 TE 优点值（ZT）显示出良好的热电特性，在该温度下的值为 3.75 × 10-6。因此，目前的 GNs 合成方法展示了一种更方便、更适合工业化生产的技术，可用于生产塑料废弃物衍生的石墨烯纳米片，并将其应用于热能转换领域。

{"title":"Copper-catalyzed plastic waste synthesized graphene nanosheets/polypyrrole nanocomposites for efficient thermoelectric applications","authors":"","doi":"10.1016/j.nxsust.2024.100081","DOIUrl":"10.1016/j.nxsust.2024.100081","url":null,"abstract":"<div><div>Presently, various catalysts have been reported for the synthesis of carbon nanomaterials from a variety of plastic waste, which needs to be removed at the end of the synthesis process by using chemical techniques and hence make the process more typical from the aspect of cost-benefit and circular economic aspects. Herewith, we report copper turnings as the cost-effective and greener catalytic templates for synthesizing highly conducting graphene nanosheets (GNs). The synthesis of the GNs from plastic waste was done as we previously reported in the steps of the pyrolytic process, where the copper turnings are used as catalytic templates in the present study. Because of the excellent catalytic efficiency towards breaking old carbon-carbon bonds and forming new carbon-carbon bonds, the copper turnings act as an excellent degradation catalyst and promote the growth of graphitic skeletons and, consequently, graphene nanosheets. The synthesized GNs showed a high conductivity of ∼ 1730 S/m. GNs thus synthesized is implemented for synthesizing GNs/polypyrrole nanocomposites, which is later investigated for the TE applications. The values of the Seebeck coefficient showed that the composite of GNs/polypyrrole performs as a p-type semiconductor. The TE figure of merit (ZT) for GNs/polypyrrole demonstrated good thermoelectric characteristics and showed a value of 3.75 × 10<sup>−6</sup> at the temperature. Thus, the present method of synthesis of GNs showed a more convenient, industrial friendly technique for the production of plastic waste derived graphene nanosheets and its application for thermal energy conversion applications.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142416955","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}

引用次数: 0

BIM-based parametric energy analysis of green building components for the roofs and facades 基于 BIM 的屋顶和外墙绿色建筑构件参数化能耗分析

Next Sustainability

Pub Date : 2024-10-07 DOI: 10.1016/j.nxsust.2024.100078

Buildings are distinguished by their high energy demand over their lifespan. Iimproving energy efficiency in buildings necessitates mitigating the operation energy performance by evaluating more sustainable building components such as green infrastructures. The novelty herein is to conduct a BIM-based parametric energy analysis of green building components for the roofs and facades, taking into consideration the climate classification and orientation of the building. The proposed framework of this study uses Autodesk Revit software and Autodesk Green Building Studio as BIM tools, and Minitab software as a parametric analysis tool to estimate the energy performance of several alternative components based on Energy Use Intensity (EUI) and Annual Peak Demand (APD). A case study of a residential building is examined in four cities within different climate zones in Brazil; Rio de Janeiro (climate zone 08), Macaé (climate zone 05), Petrópolis (climate zone 03), and Nova Friburgo (climate zone 02). The base model design of components of the building includes a reinforced concrete roof and ceramic masonry façade. The utilized alternatives are roof components (i.e. green roofs and expanded clay roofs), and green façade. This work insight using green façade for all elevations and green roofs to enhance energy efficiency in terms of EUI by (10,17 %) in Rio de Janeiro, (6,67 %) in Macaé, (11,43 %) in Pertópolis, and (16,43 %) in Nova Friburgo. While the efficiency in terms of APD would be about (28,07 %) in Rio de Janeiro, (22,79 %) in Macaé, (21,67 %) in Pertópolis, and (12,58 %) in Nova Friburgo. When the construction project is designed to install a green façade to the main elevation only, this work recommends using green roofs rather than the expanded clay roof or the base model design roofs to increase energy efficiency in such types of buildings. This work contributes to integrating green building components into building designs to improve energy efficiency and empower decision-making and sustainability in buildings.

建筑物的显著特点是在其生命周期内对能源的需求量很大。要提高建筑物的能效，就必须通过评估更具可持续性的建筑组件（如绿色基础设施）来降低运行能耗。本文的新颖之处在于对屋顶和外墙的绿色建筑构件进行基于 BIM 的参数化能源分析，同时考虑到气候分类和建筑物的朝向。本研究提出的框架使用 Autodesk Revit 软件和 Autodesk Green Building Studio 作为 BIM 工具，并使用 Minitab 软件作为参数分析工具，根据能源使用强度（EUI）和年峰值需求（APD）估算几种可选构件的能源性能。在巴西不同气候区的四个城市（里约热内卢（气候区 08）、马卡埃（气候区 05）、彼得罗波利斯（气候区 03）和新弗里堡戈（气候区 02））进行了住宅楼案例研究。建筑组件的基础模型设计包括钢筋混凝土屋顶和陶瓷砌体外墙。采用的替代方案是屋顶组件（即绿色屋顶和膨胀粘土屋顶）和绿色外墙。这项研究发现，在所有立面使用绿色外墙和绿色屋顶可提高里约热内卢的能源效率，在 EUI 方面提高了（10.17%），在马卡埃提高了（6.67%），在佩尔托波利斯提高了（11.43%），在新弗里堡提高了（16.43%）。里约热内卢的年发电量效率约为（28.07 %），马卡埃约为（22.79 %），佩尔托波利斯约为（21.67 %），新弗里堡约为（12.58 %）。当建筑项目仅在主立面设计安装绿色立面时，这项工作建议使用绿色屋顶，而不是膨胀粘土屋顶或基础模型设计屋顶，以提高此类建筑的能源效率。这项工作有助于将绿色建筑组件融入建筑设计中，以提高能源效率，增强建筑的决策能力和可持续性。

{"title":"BIM-based parametric energy analysis of green building components for the roofs and facades","authors":"","doi":"10.1016/j.nxsust.2024.100078","DOIUrl":"10.1016/j.nxsust.2024.100078","url":null,"abstract":"<div><div>Buildings are distinguished by their high energy demand over their lifespan. Iimproving energy efficiency in buildings necessitates mitigating the operation energy performance by evaluating more sustainable building components such as green infrastructures. The novelty herein is to conduct a BIM-based parametric energy analysis of green building components for the roofs and facades, taking into consideration the climate classification and orientation of the building. The proposed framework of this study uses Autodesk Revit software and Autodesk Green Building Studio as BIM tools, and Minitab software as a parametric analysis tool to estimate the energy performance of several alternative components based on Energy Use Intensity (EUI) and Annual Peak Demand (APD). A case study of a residential building is examined in four cities within different climate zones in Brazil; Rio de Janeiro (climate zone 08), Macaé (climate zone 05), Petrópolis (climate zone 03), and Nova Friburgo (climate zone 02). The base model design of components of the building includes a reinforced concrete roof and ceramic masonry façade. The utilized alternatives are roof components (i.e. green roofs and expanded clay roofs), and green façade. This work insight using green façade for all elevations and green roofs to enhance energy efficiency in terms of EUI by (10,17 %) in Rio de Janeiro, (6,67 %) in Macaé, (11,43 %) in Pertópolis, and (16,43 %) in Nova Friburgo. While the efficiency in terms of APD would be about (28,07 %) in Rio de Janeiro, (22,79 %) in Macaé, (21,67 %) in Pertópolis, and (12,58 %) in Nova Friburgo. When the construction project is designed to install a green façade to the main elevation only, this work recommends using green roofs rather than the expanded clay roof or the base model design roofs to increase energy efficiency in such types of buildings. This work contributes to integrating green building components into building designs to improve energy efficiency and empower decision-making and sustainability in buildings.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142416947","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}

引用次数: 0

Combination of the degrading bacterium Bacillus cereus MZ-1 and corn straw biochar enhanced the removal of imazethapyr from water solutions 降解芽孢杆菌 MZ-1 与玉米秸秆生物炭的结合提高了水溶液中吡虫啉的去除率

Next Sustainability

Pub Date : 2024-10-04 DOI: 10.1016/j.nxsust.2024.100077

Long residual herbicide imazethapyr has caused a serious threat to subsequent sensitive crop plants and ecological security. Efficient immobilized microorganism technology offers a sustainable solution for remediating pesticides contamination. In this study, three corn straw biochars produced at 300℃, 500℃, and 700℃ were used as carriers to immobilize the imazethapyr degrading strain Bacillus cereus MZ-1, aiming to efficiently remove imazethapyr from the water environment. Response surface methodology was employed to optimize the best immobilization conditions based on the efficiency of imazethapyr removal. The results indicate that the biochar produced at 500 ℃ was the most effective carrier for immobilization, despite having a lower imazethapyr removal capacity compared to the biochar produced at 700 ℃. Additionally, the optimal strain addition amount was a suspension of strain MZ-1 (OD₆₀₀=1) in a 3.5-fold biochar solution, and the best immobilized time was 18 h. The prepared immobilized MZ-1 achieved a maximum imazethapyr removal efficiency of 79.85 %. Moreover, the immobilized MZ-1 demonstrated enhanced detoxification efficacy against imazethapyr-induced harm in sensitive oilseed rape crops, surpassing the effects of using MZ-1 or biochar alone. Results of this work suggests biochar immobilized degradation strain MZ-1 is a highly effective in-situ remediation strategy for bioremediation of imazethapyr contamination.

长效除草剂咪草烟对后续敏感作物植物和生态安全造成了严重威胁。高效固定化微生物技术为修复农药污染提供了一种可持续的解决方案。本研究以 300℃、500℃ 和 700℃的三种玉米秸秆生物炭为载体，固定咪草烟降解菌株蜡样芽孢杆菌 MZ-1，旨在高效去除水环境中的咪草烟。根据咪草烟的去除效率，采用响应面方法对最佳固定条件进行了优化。结果表明，与 700 ℃ 下生产的生物炭相比，500 ℃ 下生产的生物炭虽然对吡虫啉的去除能力较低，但却是最有效的固定化载体。此外，最佳菌株添加量为菌株 MZ-1 （OD600=1）在 3.5 倍生物炭溶液中的悬浮液，最佳固定时间为 18 小时。制备的固定化 MZ-1 对吡虫啉的最大去除率为 79.85%。此外，固定化 MZ-1 对敏感的油菜作物因吡虫啉引起的危害具有更强的解毒功效，超过了单独使用 MZ-1 或生物炭的效果。这项工作的结果表明，固定了降解菌株 MZ-1 的生物炭是一种高效的原位修复策略，可用于虫螨腈污染的生物修复。

{"title":"Combination of the degrading bacterium Bacillus cereus MZ-1 and corn straw biochar enhanced the removal of imazethapyr from water solutions","authors":"","doi":"10.1016/j.nxsust.2024.100077","DOIUrl":"10.1016/j.nxsust.2024.100077","url":null,"abstract":"<div><div>Long residual herbicide imazethapyr has caused a serious threat to subsequent sensitive crop plants and ecological security. Efficient immobilized microorganism technology offers a sustainable solution for remediating pesticides contamination. In this study, three corn straw biochars produced at 300℃, 500℃, and 700℃ were used as carriers to immobilize the imazethapyr degrading strain <em>Bacillus cereus</em> MZ-1, aiming to efficiently remove imazethapyr from the water environment. Response surface methodology was employed to optimize the best immobilization conditions based on the efficiency of imazethapyr removal. The results indicate that the biochar produced at 500 ℃ was the most effective carrier for immobilization, despite having a lower imazethapyr removal capacity compared to the biochar produced at 700 ℃. Additionally, the optimal strain addition amount was a suspension of strain MZ-1 (OD<sub>600</sub>=1) in a 3.5-fold biochar solution, and the best immobilized time was 18 h. The prepared immobilized MZ-1 achieved a maximum imazethapyr removal efficiency of 79.85 %. Moreover, the immobilized MZ-1 demonstrated enhanced detoxification efficacy against imazethapyr-induced harm in sensitive oilseed rape crops, surpassing the effects of using MZ-1 or biochar alone. Results of this work suggests biochar immobilized degradation strain MZ-1 is a highly effective in-situ remediation strategy for bioremediation of imazethapyr contamination.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142416011","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}

引用次数: 0

Simultaneous removal of heavy metals and Escherichia coli from water using silver-doped hydroxyapatite-coated activated carbon nano composite-alginate beads 利用掺银羟基磷灰石涂层活性炭纳米复合材料--铝酸盐珠同时去除水中的重金属和大肠杆菌

Next Sustainability

Pub Date : 2024-10-03 DOI: 10.1016/j.nxsust.2024.100076

The scarcity of clean water due to heavy metal and microbial contamination is a global issue. In many parts of the world, heavy metals such as Pb, Cd, and U, along with bacteria like Escherichia coli, have been found to exceed permissible limits in groundwater and other water sources that the public depends on for daily drinking water. To address this, we have synthesized a novel composite material consisting of Ag-impregnated hydroxyapatite-coated activated carbon nanoparticles embedded in alginate beads, for the simultaneous removal of heavy metals (U, Pb, and Cd) and Escherichia coli from drinking water. The material's efficiency was evaluated through a series of batch and column experiments. Batch studies indicate 90 % sequestration of U within 5 hours and Pb and Cd within 7 hours, while Escherichia coli (10⁷ cfu/mL) was eradicated instantly. The study confirms that sorption follows pseudo-second-order kinetics via chemisorption and ion-exchange mechanisms. Fixed-bed column studies, using a logistic growth model, showed strong agreement between theoretical and experimental parameters for the Bohart-Adams, Thomas, and Yoon-Nelson models. The beads demonstrated a high affinity for heavy metals, achieving complete removal and disinfection within an empty bed contact time of 1.12 minutes. Reusability studies indicate that even after the third regeneration and reuse cycle, removal efficiency remained about 95 % for U and Pb, and 85 % for Cd. Furthermore, the effects of variations in water quality parameters such as pH, dissolved carbonates, humic acid, and ionic strength (except for Cd) on removal efficiency were minimal. In summary, the study revealed that the Ag-impregnated hydroxyapatite-coated activated carbon nanoparticles embedded in alginate beads are an efficient, sustainable, and cost-effective material for the simultaneous removal of Pb, Cd, U, and Escherichia coli from water with diverse physicochemical properties.

重金属和微生物污染导致的清洁水稀缺是一个全球性问题。在世界许多地方，人们发现地下水和其他水源中的重金属（如铅、镉和铀）以及细菌（如大肠杆菌）都超过了允许限值，而这些水源正是公众日常饮用水的来源。针对这一问题，我们合成了一种新型复合材料，该材料由藻酸珠中嵌入的 Ag 浸渍羟基磷灰石包覆活性炭纳米颗粒组成，可同时去除饮用水中的重金属（铀、铅和镉）和大肠杆菌。通过一系列批处理和柱实验对该材料的效率进行了评估。批处理研究表明，铀在 5 小时内吸附了 90%，铅和镉在 7 小时内吸附了 90%，而大肠杆菌（107 cfu/mL）则立即被消灭。该研究证实，通过化学吸附和离子交换机制，吸附遵循伪二阶动力学。使用逻辑生长模型进行的固定床柱研究表明，Bohart-Adams、Thomas 和 Yoon-Nelson 模型的理论参数与实验参数非常一致。微珠对重金属具有很高的亲和力，在 1.12 分钟的空床接触时间内就能实现完全去除和消毒。可重复使用性研究表明，即使在第三个再生和重复使用周期之后，对铀和铅的去除效率仍保持在 95% 左右，对镉的去除效率保持在 85%左右。此外，pH 值、溶解碳酸盐、腐殖酸和离子强度（镉除外）等水质参数的变化对去除效率的影响微乎其微。总之，该研究揭示了嵌入海藻酸盐珠中的 Ag 浸渍羟基磷灰石包覆活性炭纳米颗粒是一种高效、可持续和经济的材料，可同时去除不同理化性质的水中的铅、镉、铀和大肠杆菌。

{"title":"Simultaneous removal of heavy metals and Escherichia coli from water using silver-doped hydroxyapatite-coated activated carbon nano composite-alginate beads","authors":"","doi":"10.1016/j.nxsust.2024.100076","DOIUrl":"10.1016/j.nxsust.2024.100076","url":null,"abstract":"<div><div>The scarcity of clean water due to heavy metal and microbial contamination is a global issue. In many parts of the world, heavy metals such as Pb, Cd, and U, along with bacteria like <em>Escherichia coli</em>, have been found to exceed permissible limits in groundwater and other water sources that the public depends on for daily drinking water. To address this, we have synthesized a novel composite material consisting of Ag-impregnated hydroxyapatite-coated activated carbon nanoparticles embedded in alginate beads, for the simultaneous removal of heavy metals (U, Pb, and Cd) and <em>Escherichia coli</em> from drinking water. The material's efficiency was evaluated through a series of batch and column experiments. Batch studies indicate 90 % sequestration of U within 5 hours and Pb and Cd within 7 hours, while <em>Escherichia coli</em> (10<sup>7</sup> cfu/mL) was eradicated instantly. The study confirms that sorption follows pseudo-second-order kinetics via chemisorption and ion-exchange mechanisms. Fixed-bed column studies, using a logistic growth model, showed strong agreement between theoretical and experimental parameters for the Bohart-Adams, Thomas, and Yoon-Nelson models. The beads demonstrated a high affinity for heavy metals, achieving complete removal and disinfection within an empty bed contact time of 1.12 minutes. Reusability studies indicate that even after the third regeneration and reuse cycle, removal efficiency remained about 95 % for U and Pb, and 85 % for Cd. Furthermore, the effects of variations in water quality parameters such as pH, dissolved carbonates, humic acid, and ionic strength (except for Cd) on removal efficiency were minimal. In summary, the study revealed that the Ag-impregnated hydroxyapatite-coated activated carbon nanoparticles embedded in alginate beads are an efficient, sustainable, and cost-effective material for the simultaneous removal of Pb, Cd, U, and <em>Escherichia coli</em> from water with diverse physicochemical properties.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142416009","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}

引用次数: 0

Synthesis and structural analysis of calcined poultry manure for hydroxyapatite development 用于羟基磷灰石开发的煅烧家禽粪便的合成与结构分析

Next Sustainability

Pub Date : 2024-10-03 DOI: 10.1016/j.nxsust.2024.100079

This study investigates the viability of utilizing poultry manure, an abundant and low-cost waste material, for the synthesis of hydroxyapatite (HAp), a critical biomaterial for bone regeneration. Calcination of poultry manure was conducted at 750°C, 800°C, and 850°C for 5 h to produce HAp. The processed poultry manure was then characterized using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) with energy dispersive X-ray spectrometry (EDS), X-ray fluorescence (XRF), and X-ray diffraction (XRD) analyses. The FTIR analysis confirmed the formation of HAp through characteristic phosphate absorption bands, with the highest purity observed at 850°C. SEM analysis revealed that increasing calcination temperature enhanced the crystallinity and particle uniformity of the samples. XRF analysis showed a significant increase in CaO (40.229–43.328 %) and P₂O₅ (17.905–19.239 %) content with rising temperatures, crucial for HAp synthesis. The Ca/P ratios were determined to be 1.28, 1.54, and 1.71, respectively, indicating variations in purity and phase composition. The 800°C provides a near-ideal Ca/P ratio while the 850°C achieves a ratio slightly above the ideal, indicating a high-purity HAp phase. XRD analysis corroborated these findings, identifying hydroxyapatite (Ca₁₀P₆O₂₆H₂), as the predominant phase with minimal secondary phases. These results suggest that calcination at 850°C is optimal for producing high-purity HAp from poultry manure, offering a sustainable and cost-effective alternative to synthetic HAp production for biomedical applications.

本研究探讨了利用家禽粪便这种丰富且低成本的废物材料合成羟基磷灰石（HAp）的可行性，羟基磷灰石是骨再生的一种重要生物材料。将家禽粪便在 750°C、800°C 和 850°C 下煅烧 5 小时以产生 HAp。然后使用傅立叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和能量色散 X 射线光谱（EDS）、X 射线荧光（XRF）和 X 射线衍射（XRD）分析对处理后的家禽粪便进行表征。傅立叶变换红外光谱分析通过特征磷酸盐吸收带证实了 HAp 的形成，在 850°C 时观察到的纯度最高。扫描电子显微镜分析表明，提高煅烧温度可增强样品的结晶度和颗粒均匀性。XRF 分析表明，随着温度的升高，CaO（40.229-43.328%）和 P2O5（17.905-19.239%）的含量显著增加，这对 HAp 的合成至关重要。Ca/P 比值分别为 1.28、1.54 和 1.71，表明纯度和相组成存在变化。800°C 的 Ca/P 比接近理想值，而 850°C 的 Ca/P 比略高于理想值，表明 HAp 相的纯度较高。XRD 分析证实了这些发现，确定羟基磷灰石（Ca10P6O26H2）为主要相，次生相极少。这些结果表明，850°C 的煅烧温度是利用家禽粪便生产高纯度 HAp 的最佳温度，为生物医学应用提供了一种替代合成 HAp 生产的可持续且具有成本效益的方法。

{"title":"Synthesis and structural analysis of calcined poultry manure for hydroxyapatite development","authors":"","doi":"10.1016/j.nxsust.2024.100079","DOIUrl":"10.1016/j.nxsust.2024.100079","url":null,"abstract":"<div><div>This study investigates the viability of utilizing poultry manure, an abundant and low-cost waste material, for the synthesis of hydroxyapatite (HAp), a critical biomaterial for bone regeneration. Calcination of poultry manure was conducted at 750°C, 800°C, and 850°C for 5 h to produce HAp. The processed poultry manure was then characterized using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) with energy dispersive X-ray spectrometry (EDS), X-ray fluorescence (XRF), and X-ray diffraction (XRD) analyses. The FTIR analysis confirmed the formation of HAp through characteristic phosphate absorption bands, with the highest purity observed at 850°C. SEM analysis revealed that increasing calcination temperature enhanced the crystallinity and particle uniformity of the samples. XRF analysis showed a significant increase in CaO (40.229–43.328 %) and P<sub>2</sub>O<sub>5</sub> (17.905–19.239 %) content with rising temperatures, crucial for HAp synthesis. The Ca/P ratios were determined to be 1.28, 1.54, and 1.71, respectively, indicating variations in purity and phase composition. The 800°C provides a near-ideal Ca/P ratio while the 850°C achieves a ratio slightly above the ideal, indicating a high-purity HAp phase. XRD analysis corroborated these findings, identifying hydroxyapatite (Ca<sub>10</sub>P<sub>6</sub>O<sub>26</sub>H<sub>2</sub>), as the predominant phase with minimal secondary phases. These results suggest that calcination at 850°C is optimal for producing high-purity HAp from poultry manure, offering a sustainable and cost-effective alternative to synthetic HAp production for biomedical applications.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142416010","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}

引用次数: 0

A comprehensive review on the properties of hemp incorporated concrete: An approach to low carbon footprint construction 对掺麻混凝土性能的全面审查：低碳建筑的一种方法

Next Sustainability

Pub Date : 2024-10-01 DOI: 10.1016/j.nxsust.2024.100075

As the demand for sustainable construction materials rises, hemp-infused concrete has emerged as a promising solution to reduce carbon emissions and promote eco-friendly building practices. This review critically assesses hemp concrete's mechanical, thermal, and durability properties, highlighting its potential for widespread adoption in various industries. Hemp's porous structure contributes to improved thermal insulation, soundproofing, and biological resistance, making it suitable for in-fill materials, plastering, and insulation applications. However, its low compressive and flexural strength remains challenging, limiting mainstream use. Hemp content and composition variations have resulted in differing properties, necessitating further research to optimize the material. The study identifies the growing collaboration among countries to promote bio-based materials but acknowledges the lack of standardized norms for hemp concrete in general construction. It stresses the importance of developing uniform standards to ensure consistent quality, performance, and regulatory compliance. This study explores the properties of hemp-infused concrete. It assesses its potential as a sustainable building material while identifying gaps in research and standardization needed for its widespread adoption in the construction industry.

随着对可持续建筑材料需求的增加，麻混凝土已成为减少碳排放和促进生态友好型建筑实践的一种有前途的解决方案。本综述对麻混凝土的机械、热和耐久性能进行了严格评估，强调了其在各行各业广泛应用的潜力。麻的多孔结构有助于提高隔热、隔音和抗生物性，使其适用于填充材料、抹灰和绝缘应用。然而，它的抗压和抗弯强度较低，仍然具有挑战性，限制了其主流用途。大麻含量和成分的变化导致了不同的特性，因此有必要进一步研究以优化这种材料。该研究指出，各国在推广生物基材料方面的合作日益密切，但也承认在一般建筑中缺乏麻混凝土的标准化规范。研究强调了制定统一标准以确保质量、性能和法规一致性的重要性。本研究探讨了麻混凝土的性能。它评估了其作为可持续建筑材料的潜力，同时确定了其在建筑业广泛采用所需的研究和标准化方面的差距。

{"title":"A comprehensive review on the properties of hemp incorporated concrete: An approach to low carbon footprint construction","authors":"","doi":"10.1016/j.nxsust.2024.100075","DOIUrl":"10.1016/j.nxsust.2024.100075","url":null,"abstract":"<div><div>As the demand for sustainable construction materials rises, hemp-infused concrete has emerged as a promising solution to reduce carbon emissions and promote eco-friendly building practices. This review critically assesses hemp concrete's mechanical, thermal, and durability properties, highlighting its potential for widespread adoption in various industries. Hemp's porous structure contributes to improved thermal insulation, soundproofing, and biological resistance, making it suitable for in-fill materials, plastering, and insulation applications. However, its low compressive and flexural strength remains challenging, limiting mainstream use. Hemp content and composition variations have resulted in differing properties, necessitating further research to optimize the material. The study identifies the growing collaboration among countries to promote bio-based materials but acknowledges the lack of standardized norms for hemp concrete in general construction. It stresses the importance of developing uniform standards to ensure consistent quality, performance, and regulatory compliance. This study explores the properties of hemp-infused concrete. It assesses its potential as a sustainable building material while identifying gaps in research and standardization needed for its widespread adoption in the construction industry.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142416007","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}

引用次数: 0

Data driven-based machine learning modelling and empirical correlations for predicting snow-covered area in the Swat Region, Pakistan 基于数据驱动的机器学习建模和经验关联，用于预测巴基斯坦斯瓦特地区的积雪面积

Next Sustainability

Pub Date : 2024-09-28 DOI: 10.1016/j.nxsust.2024.100074

In recent decades, global and regional climate change has emerged as a significant challenge with potential catastrophic consequences, including hurricanes, floods, sea level rise, and temperature shifts. Snow-covered area (SCA) serves as a crucial climatic parameter reflecting climate changes, yet accurately determining SCA proves to be a challenging and time-consuming task. This study aims to develop robust prediction models for SCA by employing three machine learning (ML) approaches using readily available climatic data from Swat, Pakistan, spanning two decades. The climate data encompass precipitation, daily maximum/minimum temperatures, and SCA measurements. Three ML methods—artificial neural networks (ANN), functional networks (FN), and adaptive neuro-fuzzy inference systems (ANFIS)—were employed to model SCA. Accuracy measures, including coefficient of determination (R²), average absolute percentage error (AAPE), and root mean squared error (RMSE) were utilized to evaluate model performance. All three ML models exhibited superior performance, with high R² values and low errors. Accuracy indicators of the ANN model are better than FN and ANFIS models, yielding the highest R² (0.956) and minimum RMSE and AAPE values (0.61 and 0.91). ANFIS demonstrated slightly better performance than FN, with RMSE, AAPE, and R² values of 0.65, 1.1, and 0.950, respectively. FN yielded RMSE, AAPE, and R values of 1.14, 1.72, and 0.85, respectively. Additionally, two empirical correlations were derived from the optimized FN and ANN models for SCA prediction using the same input variables. This study underscores the efficacy of ML techniques in accurately and consistently predicting SCA parameters, offering valuable insights into climate change and its consequences.

近几十年来，全球和区域气候变化已成为一项重大挑战，可能带来灾难性后果，包括飓风、洪水、海平面上升和气温变化。积雪覆盖面积（SCA）是反映气候变化的一个重要气候参数，然而准确测定积雪覆盖面积是一项具有挑战性且耗时的任务。本研究旨在利用巴基斯坦斯瓦特地区二十年来随时可用的气候数据，采用三种机器学习（ML）方法，开发稳健的 SCA 预测模型。气候数据包括降水量、日最高/最低气温和 SCA 测量值。三种 ML 方法--人工神经网络（ANN）、函数网络（FN）和自适应神经模糊推理系统（ANFIS）--被用于建立 SCA 模型。精度指标包括判定系数 (R2)、平均绝对百分比误差 (AAPE) 和均方根误差 (RMSE)，用于评估模型性能。所有三个 ML 模型都表现出卓越的性能，R2 值高，误差小。ANN 模型的精度指标优于 FN 和 ANFIS 模型，R2 值最高（0.956），RMSE 和 AAPE 值最小（0.61 和 0.91）。ANFIS 的性能略好于 FN，其 RMSE、AAPE 和 R2 值分别为 0.65、1.1 和 0.950。FN 的 RMSE、AAPE 和 R2 值分别为 1.14、1.72 和 0.85。此外，在使用相同输入变量预测 SCA 时，从优化的 FN 和 ANN 模型中得出了两个经验相关性。这项研究强调了 ML 技术在准确、一致地预测 SCA 参数方面的功效，为气候变化及其后果提供了宝贵的见解。

{"title":"Data driven-based machine learning modelling and empirical correlations for predicting snow-covered area in the Swat Region, Pakistan","authors":"","doi":"10.1016/j.nxsust.2024.100074","DOIUrl":"10.1016/j.nxsust.2024.100074","url":null,"abstract":"<div><div>In recent decades, global and regional climate change has emerged as a significant challenge with potential catastrophic consequences, including hurricanes, floods, sea level rise, and temperature shifts. Snow-covered area (SCA) serves as a crucial climatic parameter reflecting climate changes, yet accurately determining SCA proves to be a challenging and time-consuming task. This study aims to develop robust prediction models for SCA by employing three machine learning (ML) approaches using readily available climatic data from Swat, Pakistan, spanning two decades. The climate data encompass precipitation, daily maximum/minimum temperatures, and SCA measurements. Three ML methods—artificial neural networks (ANN), functional networks (FN), and adaptive neuro-fuzzy inference systems (ANFIS)—were employed to model SCA. Accuracy measures, including coefficient of determination (R<sup>2</sup>), average absolute percentage error (AAPE), and root mean squared error (RMSE) were utilized to evaluate model performance. All three ML models exhibited superior performance, with high R<sup>2</sup> values and low errors. Accuracy indicators of the ANN model are better than FN and ANFIS models, yielding the highest R<sup>2</sup> (0.956) and minimum RMSE and AAPE values (0.61 and 0.91). ANFIS demonstrated slightly better performance than FN, with RMSE, AAPE, and R<sup>2</sup> values of 0.65, 1.1, and 0.950, respectively. FN yielded RMSE, AAPE, and R values of 1.14, 1.72, and 0.85, respectively. Additionally, two empirical correlations were derived from the optimized FN and ANN models for SCA prediction using the same input variables. This study underscores the efficacy of ML techniques in accurately and consistently predicting SCA parameters, offering valuable insights into climate change and its consequences.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357032","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}

引用次数: 0