Improvement of Saline-Alkaline Soil via Flue Gas Desulfurization Gypsum and Safety Analysis of the Associated Heavy Metals

Fu, Yanrong; He, Kun; Zhou, Chunliang; Mao, Yumei

doi:10.1088/1742-6596/1838/1/012051

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…With reference to the Chinese Groundwater Quality Standard (GB14848-2017), 20 water quality parameters were measured (Y. Fu et al 2021). Water quality parameters were measured according to U.S.…”

Section: Physicochemical Propertiesmentioning

confidence: 99%

Study on the occurrence characteristics and removal of DOM based on the mine water treatment station

Dong

Yang

Huang

2022

Preprint

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In order to find out the status of organic pollutants in coal mine area of Ordos Basin in northwest China, we used an excitation emission matrix combined with parallel factor analysis to study the compositional characteristics and fluorescence intensity of dissolved organic matter (DOM) in mine water. In this way, we found that the DOM in the Mongolia-Shaanxi border mining area of Ordos Basin has four main components: two that resemble fulvic acid (C1/C3), a protein-like tryptophan substance (C2), and a protein-like tyrosine substance (C4). The fluorescence intensity of the fulvic acid-like component increased from 334.73 a.u to 440.33 a.u after treatment, and the fluorescence intensity of the protein-like tyrosine-component decreased from 330.18 a.u to 295.78 a.u. And then we investigated the removal efficiency of DOM and other pollution in the Caojiatan mine water treatment plant’s coagulation - filter – ultrafiltration process. In this process, the removal efficiency of the protein-like tryptophan components reaches 90%, while that of chemical oxygen demand / NO2− and the total organic carbon is about 50%. The removal efficiency of the Cu2+ and F−is less than 30%, and almost none of the protein-like tyrosine components, electrical conductivity, total dissolved solids, and NH4+. Thus, It’s proved that aliphatic hydrocarbons such as alkanes and cycloalkanes in mine water were removed in the treatment process, whereas macromolecular aromatic hydrocarbons and other groups were not removed. In the end, we put forward the ozone air flotation process, ozone effect makes the water of oxygen functional groups such as carboxyl, hydroxyl content increased, allowing more of the aluminum, iron, magnesium, and calcium ion complexing, precipitation, leading to desorption from the particulate organic matter, reduce the space steric hindrance and electrostatic repulsion, the effect of enhanced coagulation, Promote the condensation of particulate matter by means of adsorption bridge. This provides theoretical support for research on the source and fate of the carbon trajectory in the water cycle in a coal mine area and provides guidance on the removal of DOM from mine water.

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Section: Physicochemical Propertiesmentioning

confidence: 99%

Study on the occurrence characteristics and removal of DOM based on the mine water treatment station

Dong

Yang

Huang

2022

Preprint

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“…However, these modifiers have some drawbacks. It is still unclear whether desulfurized gypsum will contaminate the soil with heavy metals (Fu et al., 2021; Zhao, Zhou, et al., 2020). PAM can effectively improve soil water retention performance and reduce soil erosion affected by salt (Al‐Uzairy, 2015).…”

Section: Introductionmentioning

confidence: 99%

Biochar modification methods and mechanisms for salt‐affected soil and saline‐alkali soil improvement: A review

Lin,

Yu,

Zhang

et al. 2023

Soil Use and Management

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The continuous growth of the world's population has led to an increased demand for food. Biochar (BC) contains valuable functional groups and nutrients, which have been demonstrated to enhance soil properties and boost crop yield. Nonetheless, unmodified BC exhibits significant alkalinity and a large salt concentration; thus, its efficacy in improving saline‐alkali soil remains a matter of contention. Therefore, scholars aim to address the aforementioned limitations by adapting BC. In this paper, a summary is given of the methods used to modify BC and the effects of modified BC on salt‐affected soil and saline‐alkali soil properties, including pH, nutrients and microbial activity. The effects and principles of different modifiers and modification methods on BC's physicochemical properties (porosity and functional group content and type, etc.) were revealed. Furthermore, the principle of soil improvement by modified BC varies depending on the modification method. Although modified BC can effectively enhance salt‐affected soil, its excessive application and improper selection of modifiers can aggravate Na+ toxicity or introduce other pollutants into salt‐affected soil. Therefore, using modified BC with care is imperative according to the actual situation. In this review, we provide a detailed introduction to the methods and principles of BC modification for saline‐alkali soil. Furthermore, we identify the shortcomings and future research directions in this field. These insights are valuable when choosing proper BC modification methods for salt‐affected soil.

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Study on the Migration Law of Dissolved Organic Matter in Mine Water Treatment Station

Dong¹,

Jin²,

Ji³

et al. 2022

Water

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With the improvement of coal-mining mechanizations and the intensification of human activities, the organic matter pollution of mine water is becoming severe. In this study, the chemical compositions of the influents and effluents from 15 mine water treatment stations in the mining area bordering Mongolia and Shaanxi were measured. The occurrence of DOM (dissolved organic matter) in the effluent from the mine water treatment stations in this area was determined by the EEM (excitation emission matrix), combined with the PARAFAC (parallel factor analysis) method. The DOM removal from the mine water treatment station in the Caojiatan coal mine is specifically discussed here, although trends are similar across the 15 mines. The treatment capacity of this treatment process for different types of pollutants is also evaluated, and a mine water treatment process suitable for the current coal-mining mode is suggested. The results show that the DOM of the mine water treatment stations in this area mainly has four components: a fulvic-acid-like substance (C1/C3), a protein tryptophan-like substance (C2), and a protein tyrosine-like substance (C4). The coagulation, filtration, and disinfection process has a removal efficiency of more than 90% for the protein-like tryptophan components, COD (chemical oxygen demand), and NO2−, and an efficiency of ~50% for TOC (total organic carbon), <30% for Cu2+ and F−, and almost no removal effect for protein-like tyrosine components, EC (electrical conductivity), TDS (total dissolved solids), and NH4+. These conclusions show that aliphatic hydrocarbons, such as alkanes and cycloalkanes, in mine water are removed by the treatment process, whereas macromolecular aromatic hydrocarbons and other groups are not removed by the treatment process. Based on this, an ozone-demulsification process for the special removal of protein tyrosine-like pollutants in mine water is proposed. This conclusion can provide theoretical support for research on the source and fate of the carbon trajectory in the water-cycle process and provides technical guidance for the removal of DOM from mine water.

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Improvement of Saline-Alkaline Soil via Flue Gas Desulfurization Gypsum and Safety Analysis of the Associated Heavy Metals

Cited by 3 publications

References 13 publications

Study on the occurrence characteristics and removal of DOM based on the mine water treatment station

Study on the occurrence characteristics and removal of DOM based on the mine water treatment station

Biochar modification methods and mechanisms for salt‐affected soil and saline‐alkali soil improvement: A review

Study on the Migration Law of Dissolved Organic Matter in Mine Water Treatment Station

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