Green Synthesized SiO2 Nanoparticles from Hibiscus rosa sinensis Extract for Photocatalytic Pollutant Degradation from Textile Wastewater and Ecotoxicological Assessment

IF 3 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Water, Air, & Soil Pollution Pub Date : 2025-10-04 DOI:10.1007/s11270-025-08645-0

Ganeswar Dalei, Subhraseema Das

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引用次数: 0

Abstract

The surge in population and industrialization further exacerbated by climate change have emerged into an unprecedented global water crisis. Over half of global population lacks access to safe drinking water and the situation is projected to worsen in near future. This has necessitated the development of advanced wastewater treatment systems capable of producing high-quality effluent. In present scenario an economical, and ecologically safe material for environmental remediation is warranted. The present study addresses the synthesis of SiO₂ NPs from Hibiscus rosa sinensis flower extract for wastewater treatment. The presence of siloxane and Si–O bonds was affirmed from FTIR spectroscopy. A band gap of 3.02 eV was estimated for the NPs from the Tauc plot. The NPs constituted an average particle size of 19.9 nm with a zeta potential of –49 mV. Photocatalytic efficacy of SiO₂ NPs was investigated for individual dyes namely methyl orange, eosin yellow and methylene blue and their ternary mixture under sunlight. The NPs were remarkable photocatalyst for degradation of textile dyes and exhibited good stability till the fourth cycle of reuse. Furthermore, the SiO₂ NPs-loaded cotton fabric exhibited excellent photocatalytic performance in terms of removal of 90% of dye, thereby validating its efficacy towards development of self-cleaning fabrics. The efficacy of the green NPs as a nanofertilizer was examined for okra seeds and NPs concentration upto 100 mg/ L stimulated the shoot elongation without any adverse impact. The ecotoxicological impact of photodegraded dye solution on growth of okra seeds indicated no inhibitory phytotoxic effect. Thus, the green synthesized SiO₂ NPs using red hibiscus flower extract are sustainable photocatalysts for degradation of anthropogenic organic pollutants and design of smart textiles. Furthermore, the ecological safety assessment asserted the potential use of photodegraded water for sustainable agriculture.

Graphical Abstract

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绿色紫花芙蓉提取物合成二氧化硅纳米颗粒光催化降解纺织废水污染物及生态毒理学评价

气候变化进一步加剧了人口激增和工业化，导致了前所未有的全球水危机。全球一半以上的人口无法获得安全饮用水，预计这种情况在不久的将来会恶化。这就需要开发能够产生高质量废水的先进废水处理系统。在目前的情况下，需要一种经济、生态安全的环境修复材料。研究了以芙蓉花提取物为原料合成二氧化硅NPs的工艺。傅里叶红外光谱证实了硅氧烷和硅氧键的存在。从tac图中估计NPs的带隙为3.02 eV。NPs平均粒径为19.9 nm， zeta电位为-49 mV。研究了SiO2纳米粒子对甲基橙、伊红黄和亚甲基蓝三种染料及其三元混合物在日光下的光催化效果。NPs对纺织染料的降解具有良好的光催化作用，并且在第四次循环使用前具有良好的稳定性。此外，二氧化硅nps负载棉织物表现出优异的光催化性能，可去除90%的染料，从而验证了其在开发自清洁织物方面的有效性。研究了绿色NPs作为纳米肥料对秋葵种子的施用效果，结果表明，NPs浓度达到100 mg/ L时，对秋葵芽伸长无不良影响。光降解染料溶液对秋葵种子生长的生态毒理学影响显示无抑制作用。因此，利用红色芙蓉花提取物合成的绿色二氧化硅纳米粒子是降解人为有机污染物和设计智能纺织品的可持续光催化剂。此外，生态安全评价强调了光降解水在可持续农业中的潜在用途。图形抽象

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来源期刊

Water, Air, & Soil Pollution 环境科学-环境科学

CiteScore

4.50

自引率

6.90%

发文量

448

审稿时长

2.6 months

期刊介绍： Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments. Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation. Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.