Influence of Natural Colloids on Am(III) Adsorption Onto Sediments During Batch and Stirred Flow-Through Experiments

IF 3.8 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Water, Air, & Soil Pollution Pub Date : 2025-02-25 DOI:10.1007/s11270-025-07812-7

Ke Chen, Jun Zhu, Qiulan Zhang, Jingli Shao, Yali Cui, Aiming Zhang, Song Yang, Kai Liu, Shouchuan Zhang, Liangjie Zhao

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引用次数: 0

Abstract

Exploring the kinetic adsorption and desorption of Americium (Am(III)) on sediments and natural colloids can effectively predict its solid–liquid distribution behavior in the environment. In this study, we used batch and stirred flow-through experiments to describe the kinetic adsorption and desorption process of Am(III) on Am(III)-sediments (AS) system and Am(III)-sediments-natural colloids (ASN) system under different conditions (such as solution pH, background electrolyte concentration, and solution injection velocity). The retention and desorption behavior of Am(III) was analyzed through adsorption distribution coefficients and breakthrough curves. The kinetic adsorption process was described using reaction and transport control models. The results showed that in the batch adsorption experiment, the presence of natural colloids significantly increased the adsorption distribution coefficient of the ASN system (249.11—2512.74 mL/g) compared to the AS system (233.05—447.29 mL/g). The retention of Am(III) in the stirred flow-through reactor in AS (70.26% - 73.64%) and ASN (74.13% - 76.25%) systems is relatively high under neutral and low flow rate conditions, which is attributed to the strong adsorption ability of dispersed and stable natural colloids and the sufficient adsorption time provided by low velocity. According to the fitted results of the models, it can be seen that physical reactions such as surface precipitation or surface complexation, as well as diffusion of the liquid surrounding the solid-phase adsorbent, dominate the kinetic adsorption process, which is time-dependent or non-equilibrium.

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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.