1
|
Song Y, Pan S, Jin Y, O'Connor D, Nathanail P, Bardos P, Kang Y, Zuo X, Zhang H, Hou D. Comparative life-cycle sustainability assessment of centralized and decentralized remediation strategies at the city level. Sci Total Environ 2024; 919:170908. [PMID: 38350574 DOI: 10.1016/j.scitotenv.2024.170908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 02/09/2024] [Accepted: 02/09/2024] [Indexed: 02/15/2024]
Abstract
Remediation of contaminated soil at industrial sites has become a challenge and an opportunity for sustainable urban land use, considering the substantial secondary impacts resulting from remediation activities. The design of soil remediation strategies for multi-site remediation from a regional perspective is of great significance for cities with a large number of brownfields. Centralized and decentralized facilities have been studied in different environmental fields, yet limited research has focused on centralized soil remediation, specifically the treatment of contaminated soil from different sites through the construction of shared soil treatment facilities. This study proposes a framework for comparing centralized and decentralized strategies for contaminated soil remediation based on the integration of life-cycle sustainability assessment and multi-objective optimization. With Zhuzhou, an industrial city in China, serving as an example, results show that after optimization, the centralized scenario can reduce total environmental impacts by 25 %-41 %. In addition, the centralized scenario can reduce economic costs by 27 %-39 %, saving up to 176 million USD. The advantages of the centralized soil remediation strategy include: (1) increased use of soil washing, (2) reduced use of off-site disposal, and (3) reduced construction and efficient utilization of soil treatment facilities. In conclusion, the centralized strategy is relatively suitable for cities or areas with a large number of medium or small-sized contaminated sites. The built framework can quantitatively evaluate multiple sites soil remediation at both the city and individual site level, allowing for a straightforward and objective comparison with the optimal remediation design.
Collapse
Affiliation(s)
- Yinan Song
- School of Environment, Tsinghua University, Beijing 100084, China; CNPC Research Institute of Safety & Environment Technology, Beijing 102206, China
| | - Sihan Pan
- School of Environment, Tsinghua University, Beijing 100084, China; Department of Civil & Environmental Engineering, Stanford University, Stanford, CA 94305, United States
| | - Yuanliang Jin
- School of Environment, Tsinghua University, Beijing 100084, China; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - David O'Connor
- School of Real Estate and Land Management, Royal Agricultural University, Cirencester GL7 1RS, United Kingdom
| | - Paul Nathanail
- Land Quality Management Ltd, Nottingham NG7 2TU, United Kingdom
| | - Paul Bardos
- r3 Environmental Technology Ltd, RG6 6AT Reading, United Kingdom
| | - Yang Kang
- Hunan Zhongsen Environmental Technologies Co., Ltd., Zhuzhou 412004, China
| | - Xiaoyong Zuo
- China Communications Third Navigation Engineering Bureau Co., Ltd., Shanghai 200032, China
| | - Hengyong Zhang
- China Communications Third Navigation Engineering Bureau Co., Ltd., Shanghai 200032, China
| | - Deyi Hou
- School of Environment, Tsinghua University, Beijing 100084, China.
| |
Collapse
|
2
|
Li Y, Wei M, Wei W, Zhang W, Liu L. Feasibility of soil oxidation-reduction potential in judging shear behaviour of hydrocarbon-contaminated soil. J Environ Manage 2023; 342:118303. [PMID: 37276617 DOI: 10.1016/j.jenvman.2023.118303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 05/18/2023] [Accepted: 05/28/2023] [Indexed: 06/07/2023]
Abstract
This study investigates the indicative role of oxidation-reduction potential (ORP) and pH of hydrocarbon-contaminated soils on their shear characteristics, contributing to safer and more efficient ex-situ remediation and management processes. The presence of hydrocarbons alters the soil's shear strength by affecting the hydration shell thickness, fluid's dielectric properties, and ion/electron exchange, as well as the soil's electrochemical force, which in turn affects the ORP and pH. The relationship between hydrocarbon concentrations in contaminated soils (0.1-15%) and corresponding ORP/pH values could be fitted linearly with a good correlation coefficient r (0.978), highlighting the potential of ORP/pH as an indicator for pollutant occurrence. Furthermore, the relationships between ORP/pH and shear strength, as tested in our study and obtained after processing from relevant literature sources, exhibited a strong fit (r = 0.976-0.995). The Mohr-Coulomb criterion modified using the ORP/pH parameter was established, which could improve the fitting effect of these relationships (r = 0.988-0.996), verifying the reliability of the novel criterion and application feasibility of ORP/pH. In future research, this modified criterion can be employed to conveniently assess the shear strength of contaminated soil by considering the shear behaviour of virgin soil and the ORP/pH values of the contaminated soil.
Collapse
Affiliation(s)
- Yuan Li
- State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China; University of Chinese Academy of Sciences, Beijing, 100049, China; IRSM-CAS/HK Poly U Joint Laboratory on Solid Waste Science, Wuhan, 430071, China; Hubei Province Key Laboratory of Contaminated Sludge and Soil Science and Engineering, Wuhan, 430071, China
| | - Mingli Wei
- State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China; Jiangsu Institute of Zoneco Co., Ltd., Yixing, 214200, China.
| | - Wei Wei
- State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wenwei Zhang
- Wuhan Domestic Waste Classification Promotion Center, Wuhan, 430015, China
| | - Lei Liu
- State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China; University of Chinese Academy of Sciences, Beijing, 100049, China; IRSM-CAS/HK Poly U Joint Laboratory on Solid Waste Science, Wuhan, 430071, China; Hubei Province Key Laboratory of Contaminated Sludge and Soil Science and Engineering, Wuhan, 430071, China.
| |
Collapse
|
3
|
Xue Y, Chen L, Xiang L, Zhou Y, Wang T. Experimental investigation on electromagnetic induction thermal desorption for remediation of petroleum hydrocarbons contaminated soil. J Environ Manage 2023; 328:117200. [PMID: 36608456 DOI: 10.1016/j.jenvman.2022.117200] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 12/15/2022] [Accepted: 12/30/2022] [Indexed: 06/17/2023]
Abstract
A novel electromagnetic induction low temperature thermal desorption treatment (EMI LTTD) for petroleum hydrocarbons contaminated soil was introduced in this work. The removal rate of total petroleum hydrocarbons (TPH) under various factors, the morphology changes of soils as well as removal mechanism were investigated. Results suggested that increasing the heating temperature significantly increased the removal rate of TPH. At the beginning of 20 min, most of hydrocarbons (93.44-96.91 wt%) was removed with the temperature ranged from 200 °C to 300 °C. Besides, the initial contaminants concentration, particle size and thickness of soil slightly influenced the removal rate of TPH. Desorption kinetic study demonstrated that first-order model was well-described for desorption behavior. Response surface methodology analysis showed the temperature of 216 °C, the residence time of 21 min and the moisture content of 18% was an optimum condition recommended for potentially practical application. Under this condition, the results for the composition of hydrocarbons based on carbon number fractions indicated that the fractions of C10∼C16, C17∼C22 still existed in soil, while C23∼C28 was not detected after EMI LTTD treatment. Proposed mechanism was both hydrocarbons removed by evaporation at any temperature, while parts of heavy hydrocarbons was cracked within the soil close to induction medium, resulting in re-adsorption of light hydrocarbons. A buckwheat germination and growth test indicated that soil treated by EMI LTTD was potential in reutilization for planting.
Collapse
Affiliation(s)
- Yongjie Xue
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, China
| | - Linfeng Chen
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, China
| | - Lingyan Xiang
- School of Economics and Business Foreign Languages, Wuhan Technology and Business University, Wuhan, 430065, China
| | - Yi Zhou
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, China
| | - Teng Wang
- School of Environmental Engineering, Wuhan Textile University, Wuhan, 430073, China; Engineering Research Centre for Clean Production of Textile Dyeing and Printing, Ministry of Education, Wuhan Textile University, Wuhan, 430073, China.
| |
Collapse
|
4
|
Li Y, Wei M, Yu B, Liu L, Xue Q. Impact of simulating real microplastics on toluene removal from contaminated soil using thermally enhanced air injection. Environ Pollut 2022; 310:119895. [PMID: 35961571 DOI: 10.1016/j.envpol.2022.119895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 07/08/2022] [Accepted: 08/01/2022] [Indexed: 06/15/2023]
Abstract
This paper investigated the impacts of various real microplastics (MPs), i.e., polyethylene (PE) and polyethylene terephthalate (PET) with different sizes (1000-2000 and 100-200 μm) and different dosages (0.5 and 5% on a dry weight basis), on the toluene removal during the thermally enhanced air injection treatment. First, microscopic tests were carried out to determine the MPs' microstructure and behavior. The PE was mainly a small block, and PET appeared filamentous and sheeted with a larger slenderness ratio. Second, the interactions between MPs and toluene-contaminated soils were revealed by batch adsorption equilibrium experiments and low-field magnetic resonance. The morphological differences and dosage of the MPs impacted soils' total porosity (variation range: 39.2-42.7%) and proportion of the main pores (2-200 μm). Third, the toluene removal during the air injection consisted of compaction, rapid growth, rapid reduction, and tailing stages, and the MPs were regarded as an emerging solid state to affect these removal stages. The final cumulative toluene concentrations of soil-PET mixtures were influenced by total porosity, and those of soil-PE mixtures were controlled by total porosity (influence weight: 0.67) and adsorption capacity (influence weight: 0.33); meanwhile, a self-built comprehensive coefficient of MPs can reflect the relationship between them and cumulative concentrations (correlation coefficient: 0.783).
Collapse
Affiliation(s)
- Yuan Li
- State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Mingli Wei
- State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China; Jiangsu Institute of Zoneco Co., Ltd., Yixing, 214200, China.
| | - Bowei Yu
- Specialist Laboratory, Alliance Geotechnical Pty Ltd, 2147, Australia
| | - Lei Liu
- State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Qiang Xue
- State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| |
Collapse
|