Co-Transport of Cr(VI)/Ni(II) in Solution in Alkaline Soil and their Simultaneous Immobilization

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

Water, Air, & Soil Pollution Pub Date : 2025-03-31 DOI:10.1007/s11270-025-07939-7

Zhiqiao Shi, Jiawen Ding, Tingyu Ni, Zhuhong Ding

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引用次数: 0

Abstract

The co-transport of Cr(VI) and Ni(II) in alkaline soil under different soil characteristics and hydrological/hydrochemical variables and immobilization of aqueous and soilborne Cr(VI)/Ni(II) in alkaline soil were investigated. Ni(II) transport was more sensitive to soil particle size and influent pH than Cr(VI). Humic acid (HA) and magnetite (Fe₃O₄) reduced the transport of Ni(II) more obviously, compared with Cr(VI). Reduction and adsorption were responsible for the retention of Cr(VI) in treatments with HA and Fe₃O₄, while complexation and electrostatic attraction dominated in the retention of Ni(II). The increase of IS to 16 mmol/L increased Cr(VI) penetration with 8.8%, and a low pH favored the removal of Cr(VI) but impaired that of Ni(II). Soil barriers spiked with HA + Fe⁰ was efficient in retaining about 93.8% Cr(VI) and 94.3% Ni(II) from influent. The reaction of HA and Fe₃O₄ with Cr(VI) was much slower than Fe⁰ in mixed Cr(VI)/Ni(II) solution. Cr and Ni in co-contaminated soil could be effectively stabilized by 5% Fe⁰ and 5% HA + 5% Fe⁰ groups, converting them from easy-mobile species to more stable species. The leaching experiments of the soil at the 30th day after the remediation showed that there was little amount of Cr, Ni and Fe was washed by deionized water in HA + Fe⁰ treatment. Therefore, soil characteristics and hydrological/hydrochemical variables have significantly different impacts on Cr(VI) and Ni(II) transport in alkaline soil, which should be considered seriously in their risk assessment and the pollution control. Furthermore, HA + Fe⁰ is a promising approach in long-term immobilization of Cr(VI)/Ni(II) in their co-polluted soil.

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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.