Colloids and Surfaces C: Environmental Aspects最新文献

Self-propelled ZnFe2O4@MnO2@halloysite micromotors for in situ removal of antibiotics from soil 用于从土壤中原位去除抗生素的自推进式ZnFe2O4@MnO2@halloysite微型马达

Colloids and Surfaces C: Environmental Aspects

Pub Date : 2025-12-26 DOI: 10.1016/j.colsuc.2025.100090

Ke Dong, Qi Liu, Chuan Shi, Mengyin Tan, Hong Wang

The potential negative impacts of antibiotics in soil on the natural environment have currently attracted widespread attention from the academic community and all sectors of society. In response, this study modified the natural clay mineral halloysite nanotubes (HNTs) with MnO₂ and ZnFe₂O₄ to construct self-propelled ZnFe₂O₄@MnO₂@HNT micromotors. These micromotors can effectively activate peroxymonosulfate (PMS) and hydrogen peroxide (H₂O₂), thereby efficiently degrading tetracycline (TC) in soil. Compared to the micromotors/H₂O₂ and micromotors/PMS, the coupling of PMS and H₂O₂ increased the TC removal efficiency of micromotors by 24.46 % and 21.49 %, reaching 95.44 % within 30 min. Among the components of micromotors, MnO₂ not only catalyzed the generation of oxygen by decomposing H₂O₂ to drive the autonomous motion of micromotors, but also exhibited a synergistic effect with ZnFe₂O₄ in TC removal. The micromotors displayed an apparent reaction rate constant of 7.96 and 6.08 times higher than that of MnO₂@HNT and ZnFe₂O₄ in the mixed system of PMS and H₂O₂ after 10 min’ treatment. Furthermore, key influencing factors including initial pollutant concentration, catalyst dosage, PMS concentration, and initial pH were also systematically studied, the reaction mechanism and possible transformation mechanism were inferred. This study presents a new perspective on the application of natural minerals in the field of soil pollutant degradation.

土壤中抗生素对自然环境的潜在负面影响目前已引起学术界和社会各界的广泛关注。为此，本研究用MnO2和ZnFe2O4修饰天然粘土矿物高岭土纳米管（HNTs），构建自走式ZnFe2O4@MnO2@HNT微电机。这些微型马达可以有效激活过氧单硫酸根（PMS）和过氧化氢（H2O2），从而有效地降解土壤中的四环素（TC）。与微电机/H2O2和微电机/PMS相比，PMS和H2O2耦合可使微电机的TC去除率分别提高24.46 %和21.49 %，在30 min内达到95.44 %。在微电机的组成部分中，MnO2不仅通过分解H2O2催化生成氧气驱动微电机的自主运动，而且与ZnFe2O4在去除TC方面表现出协同效应。在PMS - H2O2混合体系中，经过10 min处理，微电机的表观反应速率常数分别是MnO2@HNT和ZnFe2O4的7.96和6.08倍。并对初始污染物浓度、催化剂用量、PMS浓度、初始pH等关键影响因素进行了系统研究，推断了反应机理和可能的转化机理。本研究为天然矿物在土壤污染物降解领域的应用开辟了新的前景。

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引用次数: 0

Cross-dataset prediction of As(III) adsorption by Mg-Al-Ti oxide nanoparticles by response surface and ensemble machine learning methods 基于响应面和集合机器学习方法的Mg-Al-Ti纳米颗粒吸附As（III）的跨数据集预测

Colloids and Surfaces C: Environmental Aspects

Pub Date : 2025-12-05 DOI: 10.1016/j.colsuc.2025.100089

Somakraj Banerjee, Ranjana Das, Chiranjib Bhattacharjee

This study involves the optimization and prediction of As(III) adsorption performance by Mg-Al-Ti composite oxide nanoparticles using response surface methodology (RSM) and ensemble machine learning (ML) methods. A 5-factor Box and Wilson central composite design (CCD) with two star-points were used to observe the effect of pH (6−11), contact time (220–360 min), adsorbent dose (0.35–0.7 g/l), agitation (250–500 rpm), initial concentration (90–200 ppm) on the As(III) adsorption capacity (mg/g) and removal percentage. Predication using the machine learning technique was done using ensemble learning by using random forest (RF), extra trees (ExT), gradient boosting (GB), Ada boost (AB) & XGBoost (XGB) regression models on the CCD dataset and a bigger training dataset mixing the current dataset with the data from 10 different metal oxide-based adsorbents from literature. From RSM method, with an adjusted R² value of 0.89, optimized parameters for maximum removal percentage (95.21 %) were found to be pH = 6.08, contact time = 357.44 min, dose = 0.6 g/l and 495.98 rpm for an initial concentration of 100 ppm. The ExT regression model showed the highest prediction accuracy of 89.31 % based on the training on CCD data while training the models on the bigger data set showed the highest prediction accuracy of 93.36 % and adjusted R² of 0.93 by XGB model. Based on the analysis, using ensemble learning and a larger data set improves the model significantly and provides better prediction than CCD.

本研究采用响应面法（RSM）和集成机器学习（ML）方法对Mg-Al-Ti复合氧化物纳米颗粒吸附As（III）的性能进行了优化和预测。采用双星点5因素Box和Wilson中心复合设计（CCD），考察了pH（6−11）、接触时间（220 ~ 360 min）、吸附剂剂量（0.35 ~ 0.7 g/l）、搅拌（250 ~ 500 rpm）、初始浓度（90 ~ 200 ppm）对As（III）吸附量（mg/g）和去除率的影响。使用机器学习技术的预测是通过集成学习完成的，通过在CCD数据集上使用随机森林（RF）、额外树（ExT）、梯度增强（GB）、Ada增强（AB）和XGBoost （XGB）回归模型，以及将当前数据集与文献中10种不同金属氧化物吸附剂的数据混合在一起的更大的训练数据集。RSM法在调整后的R2值为0.89的条件下，在初始浓度为100 ppm时，pH = 6.08，接触时间= 357.44 min，剂量= 0.6 g/l和495.98 rpm，可获得95.21 %的最大去除率。ExT回归模型在CCD数据上训练的预测准确率最高，为89.31 %；XGB模型在更大数据集上训练的预测准确率最高，为93.36 %，调整后R2为0.93。基于分析，使用集成学习和更大的数据集显著改善了模型，并提供了比CCD更好的预测。

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引用次数: 0

The influence of nanoplastics' surface charge on the formation of protein corona and the subsequent sorption of Cd2 + and Pb2+ ions 纳米塑料表面电荷对蛋白质电晕形成及随后Cd2 +和Pb2+离子吸附的影响

Colloids and Surfaces C: Environmental Aspects

Pub Date : 2025-11-24 DOI: 10.1016/j.colsuc.2025.100088

Aqsa Sadiq , Lucio Litti , Sara Bogialli , Giorgio Arrigoni , Paolo Pastore , Fazel Abdolahpur Monikh

Micro and nanoplastics (NPs) might enter in human body and with proteins resulting in the formation of the protein corona. In this study, we investigated the formation of protein coronas on negatively and positively charged polystyrene (PS) NPs and examined their effects on the sorption of Pb²⁺ and Cd²⁺. Both positively and negatively charged PS-NPs exhibited nearly identical protein corona compositions, irrespective of surface charge, except for glycoproteins, which showed significantly higher adsorption on negatively charged particles. In ultrapure water without a protein corona, no significant adsorption of Cd²⁺ or Pb²⁺ was observed on either particle type. In human serum over 72 h, positively charged PS-NPs reduced Pb²⁺ concentration in the surrounding medium from 100 ± 4.42 % to 85.9 ± 7.63 % and Cd²⁺ from 100 ± 5.88 % to 88 ± 6.59 %, indicating sorption of these metals onto corona-coated particles. Negatively charged PS-NPs decreased Pb²⁺ to 83 ± 3.09 %. These results demonstrate that protein corona formation markedly modifies the metal sorption capacity of PS-NPs. Furthermore, Pb²⁺ consistently exhibited stronger adsorption than Cd²⁺, suggesting a metal-specific affinity of PS-NPs following corona formation. These findings demonstrated that the surface charge does not play a major role in the formation of the protein corona on nanoplastics. However, the protein corona can significantly promote the heavy metals adsorption by forming stable nanoplastics-protein corona (NP-PC) metal complexes under physiological conditions. This interaction may increase nanoplastics toxicity by enhancing the accumulation and transport of highly toxic metals within biological systems, with important implications for risk assessment.

微纳米塑料（NPs）可能随蛋白质进入人体，形成蛋白质冠。在这项研究中，我们研究了带正电和负电的聚苯乙烯（PS） NPs上蛋白质冠状结构的形成，并考察了它们对Pb 2 +和Cd 2 +吸附的影响。带正电荷的PS-NPs和带负电荷的PS-NPs都表现出几乎相同的蛋白质电晕组成，与表面电荷无关，除了糖蛋白，它在带负电荷的粒子上表现出明显更高的吸附。在没有蛋白冠的超纯水中，Cd 2 +或Pb 2 +在两种颗粒类型上均未观察到明显的吸附。在人类血清72 h,带正电PS-NPs减少Pb²⁺浓度在周围介质从100年 ±4.42  % 85.9 ±7.63  %和Cd²⁺从100年 ±5.88  % 88 ±6.59  %,表明这些金属到corona-coated粒子的吸附。带负电荷的PS-NPs使Pb 2 +降低到83 ± 3.09 %。这些结果表明，蛋白质电晕的形成显著改变了PS-NPs的金属吸附能力。此外，Pb 2 +始终表现出比Cd 2 +更强的吸附能力，这表明PS-NPs在电晕形成后具有金属特异性亲和力。这些发现表明，表面电荷在纳米塑料上蛋白质电晕的形成中并不起主要作用。而蛋白质电晕在生理条件下可形成稳定的纳米塑料-蛋白质电晕（NP-PC）金属配合物，显著促进重金属吸附。这种相互作用可能通过增强生物系统内高毒性金属的积累和运输而增加纳米塑料的毒性，对风险评估具有重要意义。

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引用次数: 0

Wastewater organic pollutant removal efficiency of layered double oxide (LDO), CTAB-modified LDO, and CTAB-functionalized g-C3N4/LDO composite 层状双氧化物（LDO）、ctab改性LDO和ctab功能化g-C3N4/LDO复合材料对废水有机污染物的去除效果

Colloids and Surfaces C: Environmental Aspects

Pub Date : 2025-11-18 DOI: 10.1016/j.colsuc.2025.100087

Fungbili Basumatary , Riya Daimary , Bipul Das , Sanjay Basumatary

In this study, a novel ternary composite based on graphitic carbon nitride (g-C₃N₄), layered double oxide (LDO), and cetyltrimethylammonium bromide (CTAB) was synthesized and evaluated for the effective adsorption of malachite green (MG) dye from aqueous solution. The composite was synthesized through a facile thermal and surfactant-assisted method and characterized by FTIR, XRD, FESEM, and UV–vis techniques to confirm its structural and surface properties. Batch adsorption experiments were conducted to study the influence of variables such as pH, contact time, initial dye concentration, and adsorbent amount, exclusively for the final CTAB-g-C₃N₄/LDO composite. Although the composite exhibited a slightly lower MG removal efficiency (94.34 ± 0.16 %) compared to its intermediate components such as LDH (99.4 ± 0.1 %), LDO (99.2 ± 0.14 %) and CTAB/LDO (99.07 ± 0.13 %), it demonstrated an appreciable adsorption capacity of 118.76 mg/g. The pseudo-second-order kinetic model best described the adsorption process, while the Langmuir isotherm indicated monolayer adsorption on a homogeneous surface. The integration of g-C₃N₄ and CTAB was found to enhance surface functionality and dispersion stability, offering potential advantages in future applications such as reusability and multi-pollutant removal. Overall, the composite presents a promising strategy for dye removal in wastewater treatment.

本文合成了一种新型的基于石墨氮化碳（g-C3N4）、层状双氧化物（LDO）和十六烷基三甲基溴化铵（CTAB）的三元复合材料，并对其对孔雀石绿（MG）染料的有效吸附进行了研究。通过热和表面活性剂辅助法合成了该复合材料，并通过FTIR、XRD、FESEM和UV-vis等技术对其结构和表面性能进行了表征。通过批量吸附实验，研究了pH、接触时间、初始染料浓度、吸附剂用量等因素对CTAB-g-C3N4/LDO复合材料的影响。尽管复合展出MG去除效率略低(94.34±0.16 %)相比,它的中间组件,比如LDH(99.4 ±0.1  %),LDO(99.2 ±0.14  %)和CTAB / LDO(99.07 ±0.13  %),它演示了一个明显的吸附容量118.76 毫克/克。拟二级动力学模型最好地描述了吸附过程，而Langmuir等温线则显示了均匀表面上的单层吸附。g-C3N4和CTAB的集成增强了表面功能和分散稳定性，在可重复使用和多污染物去除等未来应用中具有潜在的优势。综上所述，该复合材料在废水处理中是一种很有前途的脱除染料的方法。

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引用次数: 0

Erratum to “Nanostructured Zr-Mn binary hydrous oxide as an effective adsorbent for arsenic removal from water and groundwater” [Colloids Surf. C: Environ. Asp. 1C (2023) 100022] “纳米结构Zr-Mn二元水合氧化物作为水和地下水中砷的有效吸附剂”的勘误[Colloids Surf]。C:环境。Asp. 1C (2023) 100022]

Colloids and Surfaces C: Environmental Aspects

Pub Date : 2025-11-01 DOI: 10.1016/j.colsuc.2025.100056

Gaosheng Zhang , A.K.M. Khorshed Alam , J. Paul Chen

引用次数: 0

Hydrophobic dissolved organic matter: Preferential retention in soil due to wet-dry cycles 疏水溶解有机物：由于干湿循环，优先保留在土壤中

Colloids and Surfaces C: Environmental Aspects

Pub Date : 2025-11-01 DOI: 10.1016/j.colsuc.2025.100086

Z. Eslamikhah , J.F. Carstens , S. Dultz , K. Zamanian , J. Bachmann , G. Guggenberger

Dissolved organic matter (DOM) is the most mobile and reactive component of the soil carbon pool, yet how changes in water content controls DOM retention in soils is not well understood. Transport and retention of DOM at two comparatively low and high loadings on a homogenized subsoil sample were determined via column breakthrough experiments, where the role of water saturation and two consecutive wet-dry cycles were systematically compared. In the column effluent, dissolved organic carbon (DOC) and dissolved total nitrogen (TN) as well as aromaticity by the specific UV absorption at 280 nm (SUVA) were determined. The total retention of DOC following wet-dry cycles was significantly higher than under water saturated condition. Rewetting particularly led to stronger depletion of hydrophobic fractions in the leached DOM. This was especially evident when the DOM loading before drying was lower. Nevertheless, a consecutive second wet-dry cycle led to comparatively less depletion of hydrophobic fractions in the leachate in both DOM loadings. Significant decreases in soil wettability and surface free energy were also evident after DOM percolation, particularly after drying, as determined by analyzing the sessile drop contact angle. We conclude that wet-dry cycles increase DOM retention in soils. This is generally due to more DOM interactions with soil mineral surfaces amplifying the retention of hydrophobic fractions. Retention of less hydrophilic DOM in the second consecutive wet-dry cycle indicates the formation of layered coatings on mineral surfaces. These coatings can lead to soil water repellency and influence other soil properties.

溶解有机质（DOM）是土壤碳库中最具流动性和活性的成分，但含水量变化如何控制土壤中DOM的保留尚不清楚。通过柱突破实验，确定了均匀底土样品在两种相对低负荷和高负荷下DOM的运输和保留，其中系统地比较了水饱和度和两个连续干湿循环的作用。通过280 nm （SUVA）比紫外吸收测定柱出水溶解有机碳（DOC）、溶解总氮（TN）和芳香性。干湿循环后DOC的总滞留量显著高于水饱和条件。再润湿特别导致浸出DOM中疏水组分的更强耗竭。当干燥前的DOM加载较低时，这一点尤其明显。然而，连续第二个干湿循环导致两种DOM加载中渗滤液中疏水组分的消耗相对较少。土壤润湿性和表面自由能在DOM渗透后也明显下降，特别是在干燥后，这是通过分析无根滴接触角来确定的。我们得出结论，干湿循环增加了土壤中DOM的保留。这通常是由于DOM与土壤矿物表面的更多相互作用放大了疏水组分的保留。在连续第二次干湿循环中，亲水性较差的DOM保留表明矿物表面形成了层状涂层。这些涂层会导致土壤的疏水性，并影响土壤的其他性质。

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引用次数: 0

Erratum to “Effect of particle size on the capture of uranium oxide colloidal particles from aqueous suspensions via high-gradient magnetic filtration” [Colloids Surf. C: Environ. Asp. 1C (2023) 100005] “粒度对通过高梯度磁过滤从水悬浮液中捕获氧化铀胶体颗粒的影响”的勘误[Colloids Surf]。C:环境。Asp. 1C (2023) 100005]

Colloids and Surfaces C: Environmental Aspects

Pub Date : 2025-11-01 DOI: 10.1016/j.colsuc.2025.100057

Alexander I. Wiechert , Sotira Yiacoumi , Joanna McFarlane , Charles F. Weber , Costas Tsouris

引用次数: 0

Erratum to “High-gradient magnetic separation of colloidal uranium oxide particles from soil components in aqueous suspensions” [Colloids Surf. C: Environ. Asp. 2C (2024) 100023] 对“水悬浮液中土壤组分中氧化铀胶体颗粒的高梯度磁分离”的勘误[Colloids Surf]。C:环境。Asp. 2C (2024) 100023]

Colloids and Surfaces C: Environmental Aspects

Pub Date : 2025-11-01 DOI: 10.1016/j.colsuc.2025.100058

Joanna McFarlane , Charles Weber , Alexander Wiechert , Sotira Yiacoumi , Costas Tsouris

引用次数: 0

Evaluating fundamental surface properties for selective separation of synthetic and natural fiber fragments 评价合成纤维和天然纤维碎片选择性分离的基本表面特性

Colloids and Surfaces C: Environmental Aspects

Pub Date : 2025-11-01 DOI: 10.1016/j.colsuc.2025.100084

Aparna J. Lobo , Chinmayee V. Subban

Microplastic pollution is a growing environmental and human health hazard. Entering the environment via municipal wastewater, a bulk of the microplastics found are synthetic textile fiber fragments (FFs) generated from washing of synthetic fabrics. Separating the synthetic from natural FFs at laundry effluents could prevent eventual pollution of rivers and oceans. In this study we characterize representative synthetic and natural FFs to identify key properties that distinguish the FF material types towards achieving selective separation. Our data show polyester FFs and cotton FFs differ in their hydrophobicity, which can be leveraged for targeted separation. Based on differences in hydrophobicity and associated thermodynamic driving forces, selective removal of polyester FFs from a mixture of polyester and cotton FFs is demonstrated. In a batch process utilizing flotation, bubbles are used to selectively separate synthetic polyester FFs from natural cotton FFs in mixed-fiber solutions containing salt (NaCl). Using principal component analysis (PCA) of Fourier Transform Infrared (FTIR) spectroscopy data, the FF compositional make up is quantified for analysis of separation efficiency and recovery of synthetic FFs. The synthetic FF recovery and separation efficiency is then evaluated as a function of time, FF concentration, and FF composition. All experimental conditions evaluated in the study showed selective recovery of polyester over cotton FFs, and for the configurations tested, batch times longer than 15 min had minimal efficiency gains. This study demonstrates separation of two representative FFs dispersed in salt solution as a first step toward microplastics remediation.

微塑料污染是日益严重的环境和人类健康危害。通过城市污水进入环境的微塑料中，大部分是洗涤合成织物产生的合成纺织纤维碎片（FFs）。将洗衣废水中的合成FFs与天然FFs分离可以防止最终污染河流和海洋。在本研究中，我们对具有代表性的合成和天然FF进行了表征，以确定区分FF材料类型的关键特性，从而实现选择性分离。我们的数据显示聚酯FFs和棉花FFs的疏水性不同，这可以用于有针对性的分离。基于疏水性和相关热力学驱动力的差异，证明了从聚酯和棉花FFs混合物中选择性去除聚酯FFs。在浮选间歇式工艺中，在含盐（NaCl）的混合纤维溶液中，利用气泡选择性地分离合成聚酯FFs和天然棉花FFs。利用傅里叶变换红外（FTIR）光谱数据的主成分分析（PCA）对FF的成分构成进行量化，分析合成FF的分离效率和回收率。然后将合成FF的回收率和分离效率作为时间、FF浓度和FF组成的函数进行评估。研究中评估的所有实验条件都表明，聚酯比棉质FFs有选择性地回收，对于测试的配置，批次时间超过15 min的效率收益最小。本研究展示了分离分散在盐溶液中的两种代表性FFs作为微塑料修复的第一步。

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引用次数: 0

Enhanced removal of per- and poly-fluoroalkyl substances (PFAS) by modified clay: Adsorption behavior, simulation, and regeneration 改性粘土增强对全氟烷基和多氟烷基物质（PFAS）的去除：吸附行为、模拟和再生

Colloids and Surfaces C: Environmental Aspects

Pub Date : 2025-11-01 DOI: 10.1016/j.colsuc.2025.100083

Simeng Li , Madjid Mohseni

A modified clay adsorbent was developed by coating poly(diallyldimethylammonium) chloride (PDADMAC) to improve its performance in removing per- and poly-fluoroalkyl substances (PFAS) from water. The adsorption equilibrium was well described by the Freundlich isotherm, with K_f values of 2.29 ± 0.80 (mg/g)(L/mg)¹^⁄ⁿ for perfluorobutanoic acid (PFBA) and 38.21 ± 6.73 (mg/g)(L/mg)¹^⁄ⁿ for perfluorooctanoic acid (PFOA), while the kinetic behavior fit both pseudo-first-order and pseudo-second-order models, with all R² values exceeding 0.95. Adsorption performance decreased with increasing pH, particularly for short-chain PFAS. Compared to NaCl, the presence of natural organic matter had a more pronounced inhibitory effect on PFAS uptake. The PDADMAC-modified clay demonstrated excellent reusability, retaining > 98 % of its initial efficiency after five regeneration cycles using simple NaCl brine. This effective brine-based regeneration outperformed commercial adsorbents such as ion exchange resins and activated carbon. Quantum mechanical calculations and molecular dynamics simulations revealed that adsorption is mainly driven by noncovalent interactions, with strong electrostatic attraction (–42.73 kcal/mol for PFBA and –43.26 kcal/mol for PFOA) complemented by van der Waals forces (–10.03 kcal/mol for PFBA and –15.80 kcal/mol for PFOA). These negative interaction energies confirm the thermodynamic favourability of adsorption. These results demonstrate that PDADMAC modification substantially improves performance of clay-based adsorbents and offers a practical, low-cost, and scalable strategy for PFAS remediation in water treatment applications.

采用包覆聚二烯基二甲基氯化铵（PDADMAC）改性粘土吸附剂，提高其去除水中全氟烷基和聚氟烷基物质（PFAS）的性能。Freundlich等温线很好地描述了吸附平衡，全氟丁酸（PFBA）的Kf值为2.29 ± 0.80 (mg/g)（L/mg）¹/ n2，全氟辛酸（PFOA）的Kf值为38.21 ± 6.73 (mg/g)（L/mg）¹/ n2，动力学行为符合准一级和准二级模型，R²值均大于0.95。吸附性能随pH值的增加而下降，尤其是短链PFAS。与NaCl相比，天然有机质的存在对PFAS的吸收有更明显的抑制作用。经pdadmac改性的粘土具有良好的可重复使用性，在使用简单NaCl盐水进行5次再生循环后，其效率仍保持>； 98 %。这种有效的盐水再生优于商业吸附剂，如离子交换树脂和活性炭。量子力学计算和分子动力学模拟表明，吸附主要由非共价相互作用驱动，具有强静电吸引力（PFBA为-42.73 kcal/mol， PFOA为-43.26 kcal/mol）和范德华力（PFBA为-10.03 kcal/mol， PFOA为-15.80 kcal/mol）。这些负相互作用能证实了吸附的热力学优势。这些结果表明，PDADMAC改性大大提高了粘土基吸附剂的性能，为水处理应用中的PFAS修复提供了一种实用、低成本、可扩展的策略。

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引用次数: 0