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Huang L, Chen W, Wei L, Li X, Huang Y, Huang Q, Liu C, Liu Z. Biochar Blended with Alkaline Mineral Can Better Inhibit Lead and Cadmium Uptake and Promote the Growth of Vegetables. PLANTS (BASEL, SWITZERLAND) 2024; 13:1934. [PMID: 39065461 PMCID: PMC11280933 DOI: 10.3390/plants13141934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2024] [Revised: 07/05/2024] [Accepted: 07/10/2024] [Indexed: 07/28/2024]
Abstract
Three successive vegetable pot experiments were conducted to assess the effects on the long-term immobilization of heavy metals in soil and crop yield improvement after the addition of peanut shell biochar and an alkaline mineral to an acidic soil contaminated with lead and cadmium. Compared with the CK treatment, the change rates of biomass in the edible parts of the three types of vegetables treated with B0.3, B1, B3, B9, R0.2 and B1R0.2 were -15.43%~123.30%, 35.10%~269.09%, 40.77%~929.31%, -26.08%~711.99%, 44.14%~1067.12% and 53.09%~1139.06%, respectively. The cadmium contents in the edible parts of the three vegetables treated with these six additives reduced by 2.08%~13.21%, 9.56%~24.78%, 9.96%~35.61%, 41.96%~78.42%, -4.19%~57.07% and 12.43%~65.92%, respectively, while the lead contents in the edible parts reduced by -15.70%~59.47%, 6.55%~70.75%, 3.40%~80.10%, 55.26%~89.79%, 11.05%~70.15% and 50.35%~79.25%, respectively. Due to the increases in soil pH, soil cation-exchange capacity and soil organic carbon content, the accumulation of Cd and Pb in the vegetables was most notably reduced with a high dosage of 9% peanut shell biochar alone, followed by the addition of a low dosage of 1% peanut shell biochar blended with 0.2% alkaline mineral. Therefore, the addition of a low dosage of 1% peanut shell biochar blended with 0.2% alkaline mineral was the best additive in increasing the vegetable biomass, whereas the addition of 9% peanut shell biochar alone was the worst. Evidently, the addition of 0.2% alkaline mineral can significantly reduce the amount of peanut shell needed for passivating heavy metals in soil, while it also achieves the effect of increasing the vegetable yield.
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Affiliation(s)
- Lianxi Huang
- Laboratory of Plant Nutrition and Fertilizer in South Region, Laboratory of Nutrient Cycling and Farmland Conservation, Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key, Ministry of Agriculture, Guangzhou 510640, China; (L.H.); (W.C.); (X.L.); (Y.H.); (Q.H.)
| | - Weisheng Chen
- Laboratory of Plant Nutrition and Fertilizer in South Region, Laboratory of Nutrient Cycling and Farmland Conservation, Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key, Ministry of Agriculture, Guangzhou 510640, China; (L.H.); (W.C.); (X.L.); (Y.H.); (Q.H.)
| | - Lan Wei
- Laboratory of Plant Nutrition and Fertilizer in South Region, Laboratory of Nutrient Cycling and Farmland Conservation, Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key, Ministry of Agriculture, Guangzhou 510640, China; (L.H.); (W.C.); (X.L.); (Y.H.); (Q.H.)
| | - Xiang Li
- Laboratory of Plant Nutrition and Fertilizer in South Region, Laboratory of Nutrient Cycling and Farmland Conservation, Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key, Ministry of Agriculture, Guangzhou 510640, China; (L.H.); (W.C.); (X.L.); (Y.H.); (Q.H.)
| | - Yufen Huang
- Laboratory of Plant Nutrition and Fertilizer in South Region, Laboratory of Nutrient Cycling and Farmland Conservation, Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key, Ministry of Agriculture, Guangzhou 510640, China; (L.H.); (W.C.); (X.L.); (Y.H.); (Q.H.)
| | - Qing Huang
- Laboratory of Plant Nutrition and Fertilizer in South Region, Laboratory of Nutrient Cycling and Farmland Conservation, Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key, Ministry of Agriculture, Guangzhou 510640, China; (L.H.); (W.C.); (X.L.); (Y.H.); (Q.H.)
| | - Chuanping Liu
- Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China;
| | - Zhongzhen Liu
- Laboratory of Plant Nutrition and Fertilizer in South Region, Laboratory of Nutrient Cycling and Farmland Conservation, Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key, Ministry of Agriculture, Guangzhou 510640, China; (L.H.); (W.C.); (X.L.); (Y.H.); (Q.H.)
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2
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Khare S, Singhal A, Rallapalli S, Mishra A. Bio-chelate assisted leaching for enhanced heavy metal remediation in municipal solid waste compost. Sci Rep 2024; 14:14238. [PMID: 38902389 PMCID: PMC11190260 DOI: 10.1038/s41598-024-65280-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Accepted: 06/18/2024] [Indexed: 06/22/2024] Open
Abstract
Municipal solid waste compost, the circular economy's closed-loop product often contains excessive amounts of toxic heavy metals, leading to market rejection and disposal as waste material. To address this issue, the study develops a novel approach based on: (i) utilizing plant-based biodegradable chelating agent, L-glutamic acid, N,N-diacetic acid (GLDA) to remediate heavy metals from contaminated MSW compost, (ii) comparative assessment of GLDA removal efficiency at optimal conditions with conventional nonbiodegradable chelator EDTA, and (iii) enhanced pre- and post-leaching to evaluate the mobility, toxicity, and bioavailability of heavy metals. The impact of treatment variables, such as GLDA concentration, pH, and retention time, on the removal of heavy metals was investigated. The process was optimized using response surface methodology to achieve the highest removal effectiveness. The findings indicated that under optimal conditions (GLDA concentration of 150 mM, pH of 2.9, retention time for 120 min), the maximum removal efficiencies were as follows: Cd-90.32%, Cu-81.96%, Pb-91.62%, and Zn-80.34%. This process followed a pseudo-second-order kinetic equation. Following GLDA-assisted leaching, the geochemical fractions were studied and the distribution highlighted Cd, Cu, and Pb's potential remobilization in exchangeable fractions, while Zn displayed integration with the compost matrix. GLDA-assisted leaching and subsequent fractions illustrated transformation and stability. Therefore, this process could be a sustainable alternative for industrial applications (agricultural fertilizers and bioenergy) and social benefits (waste reduction, urban landscaping, and carbon sequestration) as it has controlled environmental footprints. Hence, the proposed remediation strategy, chemically assisted leaching, could be a practical option for extracting heavy metals from MSW compost, thereby boosting circular economy.
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Affiliation(s)
- Srishti Khare
- Department of Civil Engineering, Birla Institute of Technology and Science, Pilani, Rajasthan, India
| | - Anupam Singhal
- Department of Civil Engineering, Birla Institute of Technology and Science, Pilani, Rajasthan, India
| | - Srinivas Rallapalli
- Department of Civil Engineering, Birla Institute of Technology and Science, Pilani, Rajasthan, India.
- Department of Bioproducts and Biosystems Engineering, University of Minnesota, Twin Cities, USA.
| | - Anant Mishra
- Department of Civil Engineering, Birla Institute of Technology and Science, Pilani, Rajasthan, India
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Luo Y, Zhang Y, Xiong Z, Chen X, Sha A, Xiao W, Peng L, Zou L, Han J, Li Q. Peptides Used for Heavy Metal Remediation: A Promising Approach. Int J Mol Sci 2024; 25:6717. [PMID: 38928423 PMCID: PMC11203628 DOI: 10.3390/ijms25126717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 05/28/2024] [Accepted: 06/05/2024] [Indexed: 06/28/2024] Open
Abstract
In recent years, heavy metal pollution has become increasingly prominent, severely damaging ecosystems and biodiversity, and posing a serious threat to human health. However, the results of current methods for heavy metal restoration are not satisfactory, so it is urgent to find a new and effective method. Peptides are the units that make up proteins, with small molecular weights and strong biological activities. They can effectively repair proteins by forming complexes, reducing heavy metal ions, activating the plant's antioxidant defense system, and promoting the growth and metabolism of microorganisms. Peptides show great potential for the remediation of heavy metal contamination due to their special structure and properties. This paper reviews the research progress in recent years on the use of peptides to remediate heavy metal pollution, describes the mechanisms and applications of remediation, and provides references for the remediation of heavy metal pollution.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Jialiang Han
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Sichuan Engineering & Technology Research Center of Coarse Cereal Industrialization, School of Food and Biological Engineering, Chengdu University, Chengdu 610000, China; (Y.L.); (Y.Z.); (Z.X.); (X.C.); (A.S.); (W.X.); (L.P.); (L.Z.)
| | - Qiang Li
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Sichuan Engineering & Technology Research Center of Coarse Cereal Industrialization, School of Food and Biological Engineering, Chengdu University, Chengdu 610000, China; (Y.L.); (Y.Z.); (Z.X.); (X.C.); (A.S.); (W.X.); (L.P.); (L.Z.)
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Zhang Y, Fu P, Ni W, Zhang S, Li S, Deng W, Hu W, Li J, Pei F, Du L, Wang Y. A review of solid wastes-based stabilizers for remediating heavy metals co-contaminated soil: Applications and challenges. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 920:170667. [PMID: 38331289 DOI: 10.1016/j.scitotenv.2024.170667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 01/27/2024] [Accepted: 02/01/2024] [Indexed: 02/10/2024]
Abstract
The remediation of heavy metals/metalloids (HMs) co-contaminated soil by solid wastes-based stabilizers (SWBS) has received major concern recently. Based on the literature reported in the latest years (2010-2023), this review systematically summarizes the different types of solid wastes (e.g., steel slag, coal fly ash, red mud, and sewage sludge, etc.) employed to stabilize HMs contaminated soil, and presents results from laboratory and field experiments. Firstly, the suitable solid wastes for soil remediation are reviewed, and the pros and cons are presented. Thereafter, the technical feasibility and economic benefit are evaluated for field application. Moreover, evaluation methods for remediation of different types of HMs-contaminated soil and the effects of SWBS on soil properties are summarized. Finally, due to the large specific surface, porous structure, and high reactivity, the SWBS can effectively stabilize HMs via adsorption, complexation, co/precipitation, ion exchange, electrostatic interaction, redox, and hydration process. Importantly, the environmental implications and long-term effectiveness associated with the utilization of solid wastes are highlighted, which are challenges for practical implementation of soil stabilization using SWBS, because the aging of soil/solid wastes has not been thoroughly investigated. Future attention should focus on modifying the SWBS and establishing an integrated long-term stability evaluation method.
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Affiliation(s)
- Yuliang Zhang
- School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Pingfeng Fu
- School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China; Key Laboratory of the Ministry of Education for Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, China.
| | - Wen Ni
- School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China; Key Laboratory of the Ministry of Education for Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, China
| | - Siqi Zhang
- School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China; Key Laboratory of the Ministry of Education for Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, China
| | - Sheng Li
- School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Wei Deng
- School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Wentao Hu
- School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China; Key Laboratory of the Ministry of Education for Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, China
| | - Jia Li
- School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Fuyun Pei
- CECEP Tech and Ecology & Environment Co., Ltd., Shenzhen 518017, China
| | - Linfeng Du
- CECEP Tech and Ecology & Environment Co., Ltd., Shenzhen 518017, China
| | - Yueling Wang
- CECEP Tech and Ecology & Environment Co., Ltd., Shenzhen 518017, China
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Liu S, Yang X, Shi B, Liu Z, Yan X, Zhou Y, Liang T. Utilizing machine learning algorithm for finely three-dimensional delineation of soil-groundwater contamination in a typical industrial park, North China: Importance of multisource auxiliary data. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 911:168598. [PMID: 37981145 DOI: 10.1016/j.scitotenv.2023.168598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 11/01/2023] [Accepted: 11/13/2023] [Indexed: 11/21/2023]
Abstract
Intensive industrial activities cause soil contamination with wide variations and even perturb groundwater safety. Precision delineation of soil contamination is the foundation and precondition for soil quality assurance in the practical environmental management process. However, spatial non-stationarity phenomenon of soil contamination and heterogeneous sampling are two key issues that affect the accuracy of contamination delineation model. Taking a typical industrial park in North China as the research object, we constructed a random forest (RF) model for finely characterizing the distribution of soil contaminants using sparse-biased drilling data. Results showed that the R2 values of arsenic and 1,2-dichloroethane predicted by RF (0.8896 and 0.8973) were greatly higher than those of inverse distance weighted model (0.2848 and 0.2908), indicating that RF was more adaptable to actual non-stationarity sites. The back propagation neural network algorithm was utilized to establish a three-dimensional visualization of the contamination parcel of subsoil-groundwater system. Multiple sources of environmental data, including hydrogeological conditions, geochemical characteristics and anthropogenic industrial activities were integrated into the model to optimize the prediction accuracy. The feature importance analysis revealed that soil particle size was dominant for the migration of arsenic, while the migration of 1,2-dichloroethane highly depended on vertical permeability coefficients of the soil. Contaminants migrated downwards with soil water under gravity-driven conditions and penetrated through the subsoil to reach the saturated aquifer, forming a contamination plume with groundwater flow. Our findings afford a new idea for spatial analysis of soil-groundwater contamination at industrial sites, which will provide valuable technical support for maintaining sustainable industry.
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Affiliation(s)
- Siyan Liu
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Xiao Yang
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Biling Shi
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Zhaoshu Liu
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Xiulan Yan
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
| | - Yaoyu Zhou
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Tao Liang
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China.
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6
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Yang W, Zhang Y, Zheng J, Liu L, Si M, Liao Q, Yang Z, Zhao F. Migration of spent grain-modified colloidal ferrihydrite: Implications for the in situ stabilization of arsenic, lead, and cadmium in co-contaminated soil. CHEMOSPHERE 2023; 344:140310. [PMID: 37775058 DOI: 10.1016/j.chemosphere.2023.140310] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 08/28/2023] [Accepted: 09/25/2023] [Indexed: 10/01/2023]
Abstract
The increase of metal mining, processing, and smelting activities has precipitated a substantial escalation in the contamination of soil by heavy metals. Ferrihydrite (FH) has been commonly used as an amendment for the immobilization of heavy metals in contaminated soil. However, FH suffers from drawbacks such as agglomeration and nonmigratory characteristics, which limit its practical application in soil remediation. Herein, a novel spent grain-modified ferrihydrite (FH-SG) colloidal system was developed, and the FH-SG transport mechanisms in the soil medium were fully studied, focusing in particular on the simultaneous in situ stabilization of arsenic (As), lead (Pb), and cadmium (Cd) in co-contaminated soil. The results showed that the stabilization rates of the FH-SG material reached 94.66%, 96.12%, and 95.52% for water-soluble As, Pb, and Cd, respectively, and 72.22%, 49.39%, and 25.30% for bioavailable As, Pb, and Cd, respectively. The FH-SG material demonstrates notable migration properties in porous media. Theoretical calculation results of a single collector show that the migration deposition of FH-SG material in media is primarily governed by its inherent diffusion characteristics with minimal influence by gravitational forces and media interception. It is noteworthy that the maximum migration distance in quartz sand and soil media with different particle sizes can reach 2.07-2.92 m and 0.78-1.08 m, respectively. Altogether, our findings clearly demonstrate that FH-SG exhibits better stabilization and migration than those of FH alone and most proposed FH colloidal systems. The FH-SG colloidal system holds significant promise for the remediation of various kinds of complex polluted soil.
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Affiliation(s)
- Weichun Yang
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (CNERC-CTHMP), School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China
| | - Yujia Zhang
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (CNERC-CTHMP), School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China; Zhejiang Huayou Cobalt Co., Ltd., Quzhou 314599, Zhejiang, China
| | - Junhao Zheng
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (CNERC-CTHMP), School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China
| | - Lu Liu
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (CNERC-CTHMP), School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China
| | - Mengying Si
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (CNERC-CTHMP), School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China
| | - Qi Liao
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (CNERC-CTHMP), School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China
| | - Zhihui Yang
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (CNERC-CTHMP), School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China
| | - Feiping Zhao
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (CNERC-CTHMP), School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China.
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Jiang Z, Guo Z, Peng C, Wang X, Zhou Z, Xiao X. Model development and probabilistic risks of cadmium transport in slag-soil-groundwater systems with heterogeneous conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 895:165160. [PMID: 37379937 DOI: 10.1016/j.scitotenv.2023.165160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 06/02/2023] [Accepted: 06/25/2023] [Indexed: 06/30/2023]
Abstract
Prediction of the long-term risk of trace metals leaching from soils at smelting sites is essential for groundwater protection. Herein, a mass balance-based stochastic model was developed to simulate the transport and probabilistic risks of trace metals in heterogeneous slag-soil-groundwater systems. The model was applied to a smelting slag yard with three stacking scenarios, including (A) fixed stacking amount, (B) stacking amount increasing yearly, and (C) slag removal after 20 years. The simulations suggested that the leaching flux and net accumulation of Cd in soils of the slag yard and abandoned farmland were greatest for scenario (B), which was followed by scenarios (A) and (C). In the slag yard, a plateau occurred in the Cd leaching flux curves, followed by a sharp increase. After 100 years of leaching, only scenario (B) had a high probabilistic risk (>99.9 %) of threatening groundwater safety under heterogeneous conditions. <11.1 % of the exogenous Cd may leach into groundwater under the worst scenario. The key parameters affecting Cd leaching risk include runoff interception rate (IRCR), input flux from slag release (I), and stacking time (ST). The simulation results were consistent with the values measured in a field investigation and laboratory leaching experiments. The results should help guide remediation objectives and measures to minimize the leaching risk at smelting sites.
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Affiliation(s)
- Zhichao Jiang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Zhaohui Guo
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Chi Peng
- School of Metallurgy and Environment, Central South University, Changsha 410083, China.
| | - Xiaoyan Wang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Ziruo Zhou
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Xiyuan Xiao
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
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8
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Cui W, Li X, Duan W, Xie M, Dong X. Heavy metal stabilization remediation in polluted soils with stabilizing materials: a review. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023:10.1007/s10653-023-01522-x. [PMID: 36906650 DOI: 10.1007/s10653-023-01522-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
The remediation of soil contaminated by heavy metals has long been a concern of academics. This is due to the fact that heavy metals discharged into the environment as a result of natural and anthropogenic activities may have detrimental consequences for human health, the ecological environment, the economy, and society. Metal stabilization has received considerable attention and has shown to be a promising soil remediation option among the several techniques for the remediation of heavy metal-contaminated soils. This review discusses various stabilizing materials, including inorganic materials like clay minerals, phosphorus-containing materials, calcium silicon materials, metals, and metal oxides, as well as organic materials like manure, municipal solid waste, and biochar, for the remediation of heavy metal-contaminated soils. Through diverse remediation processes such as adsorption, complexation, precipitation, and redox reactions, these additives efficiently limit the biological effectiveness of heavy metals in soils. It should also be emphasized that the effectiveness of metal stabilization is influenced by soil pH, organic matter content, amendment type and dosage, heavy metal species and contamination level, and plant variety. Furthermore, a comprehensive overview of the methods for evaluating the effectiveness of heavy metal stabilization based on soil physicochemical properties, heavy metal morphology, and bioactivity has also been provided. At the same time, it is critical to assess the stability and timeliness of the heavy metals' long-term remedial effect. Finally, the priority should be on developing novel, efficient, environmentally friendly, and economically feasible stabilizing agents, as well as establishing a systematic assessment method and criteria for analyzing their long-term effects.
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Affiliation(s)
- Wenwen Cui
- College of Civil Engineering, Taiyuan University of Technology, No. 79 West Yingze Street, Taiyuan, 030024, Shanxi, People's Republic of China
| | - Xiaoqiang Li
- College of Civil Engineering, Taiyuan University of Technology, No. 79 West Yingze Street, Taiyuan, 030024, Shanxi, People's Republic of China
| | - Wei Duan
- College of Civil Engineering, Taiyuan University of Technology, No. 79 West Yingze Street, Taiyuan, 030024, Shanxi, People's Republic of China
| | - Mingxing Xie
- College of Civil Engineering, Taiyuan University of Technology, No. 79 West Yingze Street, Taiyuan, 030024, Shanxi, People's Republic of China
| | - Xiaoqiang Dong
- College of Civil Engineering, Taiyuan University of Technology, No. 79 West Yingze Street, Taiyuan, 030024, Shanxi, People's Republic of China.
- Shanxi Key Laboratory of Civil Engineering Disaster Prevention and Control, No. 79 West Yingze Street, Taiyuan, 030024, Shanxi, People's Republic of China.
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9
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Chen X, Xu X, Wei Y, Wang X, Cao X. Constructing the active surface soil layer with ZVI-biochar amendment for simultaneous immobilization of As and Zn in both contaminated soil and groundwater: Continuous versus intermittent infiltration mode. JOURNAL OF HAZARDOUS MATERIALS 2023; 445:130518. [PMID: 36493652 DOI: 10.1016/j.jhazmat.2022.130518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 11/23/2022] [Accepted: 11/27/2022] [Indexed: 06/17/2023]
Abstract
In this study, the zero valent iron-biochar composite (ZVI-BC) was applied to construct an active surface soil layer for the simultaneous remediation of As-Zn contaminated soil and groundwater, focusing on the influence of the infiltration mode of pumped-up groundwater into soil. The active surface soil treated more contaminated groundwater for As (4.45-5.46 L kg-1 soil) than that for Zn (2.52-3.13 L kg-1 soil) under both continuous and intermittent infiltration modes, with about 98% As and 95% Zn removed from groundwater and retained in the soil. As(V) precipitated with Fe(III) due to ZVI oxidation, which was responsible for the As immobilization. The soil under the intermittent infiltration mode was enriched by the Sphingomonas with arsenate reductase gene, which promoted more reduction of As(V) into As(III) and facilitated coprecipitation of As(III) with Fe(III). The Mn oxide determined the sorption of Zn in the active soil layer, where the Hyphomicrobium, one type of manganese oxidizing bacteria, was much higher under the continuous infiltration mode, which accounted for the more Zn immobilization. After the remediation, both As and Zn immobilized in the active surface soil showed high stability, with the average downward migration rate of only 0.207-0.368 cm year-1 within 20-year rainfall exposure. Our findings indicate that this active surface soil layer is applicable for simultaneous immobilization of As and Zn in both contaminated soil and groundwater, and the groundwater intermittent infiltration could be a better option considering the remediation effectiveness, the immobilization mechanism, the long-term stability, and the energetic efficiency.
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Affiliation(s)
- Xiang Chen
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiaoyun Xu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Yaqiang Wei
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xinbing Wang
- Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xinde Cao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Engineering Research Center of Solid Waste Treatment and Recycling, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
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10
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Lyu P, Li L, Huang X, Xie J, Ye J, Tian Y, Huang J, Zhu C. Ternary Ca-Mg-Al layered double-hydroxides for synergistic remediation of As, Cd, and Pb from both contaminated soil and groundwater: Characteristics, effectiveness, and immobilization mechanisms. JOURNAL OF HAZARDOUS MATERIALS 2023; 442:130030. [PMID: 36170797 DOI: 10.1016/j.jhazmat.2022.130030] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 09/02/2022] [Accepted: 09/17/2022] [Indexed: 06/16/2023]
Abstract
Layered double hydroxides (LDH) are the cost-effective and high-efficiency materials for remediation of potentially toxic elements (PTEs) in contaminated soil and groundwater. Herein, the effectiveness and mechanisms of a ternary Ca-Mg-Al LDH (CMAL) for the synergistic remediation of As, Cd, and Pb were investigated in contaminated soils and simulative groundwaters for the first time. The immobilization efficiencies of As, Cd, and Pb in both black soil (BS) and red soil (RS) amended by CMAL at 5 wt% were all > 75%. CMAL amendment transferred more mobile As, Cd, and Pb fractions in soils to immobile species than did Ca-Al LDH and Mg-Al LDH treatments. Furthermore, using a pump-and-treat technology, 82-98% of these 3 PTEs from contaminated groundwater were successfully immobilized in both CMAL treated BS and RS top-soils. Meanwhile, leaching of Ca, Mg, and Al from CMAL was minimal indicating the material was stable. The excellent immobilization performance of CMAL for these PTEs was attributed to the coating of soil microparticles by CMAL nanosheets that allowed complexation of Ca-O-As/Cd or Mg-O-As/Cd/Pb formation, co-precipitation of Ca/Fe-As and Cd(OH)2, and formation of Ca-bridged ternary complex (FeO-Ca-As/Cd). The adverse effect of oppositive pH/Eh-dependence between As and Cd/Pb was overshadowed by these mechanisms and thus allowed As immobilization. Immobilization of As, Cd, and Pb by CMAL amendment was more favorable for RS soil due to its lower reduction potential and more participation of metal-(hydr)oxides for complexation. Overall, the ternary-LDH is a promising synergistic remediation strategy for multi-PTEs contaminated soil and groundwater.
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Affiliation(s)
- Peng Lyu
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Lianfang Li
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Xiaoya Huang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jinni Xie
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jing Ye
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Yunlong Tian
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jinli Huang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Changxiong Zhu
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
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11
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Wang G, Tariq M, Liang W, Wan J, Peng C, Zhang W, Cao X, Lou Z. A comparative and modeled approach for three biochar materials in simultaneously preventing the migration and reducing the bioaccessibility of heavy metals in soil: Revealing immobilization mechanisms. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 309:119792. [PMID: 35863701 DOI: 10.1016/j.envpol.2022.119792] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 07/10/2022] [Accepted: 07/12/2022] [Indexed: 06/15/2023]
Abstract
The effectiveness and feasibility of the three biochar materials for remediation of arsenic (As) and lead (Pb) contaminated soil were explored in this study. Significant reduction of bioaccessibility and migration risks of both heavy metals have been explained mechanistically by incubation, column experiments and numerical simulation. Langmuir equation fitted As and Pb sorption isotherms better in the control and biochar (BC) amended soils, while Freundlich model was more suitable for iron modified biochar (Fe-BC) and sulfur/iron modified biochar (S/Fe-BC) amended soils, indicating that modified biochar promoted chemical adsorption process for As and Pb. For the three biochar materials, S/Fe-BC showed the best effects on reducing the bioavailability of As and Pb, with a decrease of 40.42%-64.21%. The reduction in bioaccessibility by metal portioning into available and non-available fractions was better for illustrating the mechanisms including adsorption, precipitation/coprecipitation and As(III) oxidation behind S/Fe-BC efficacy. Moreover, S/Fe-BC can effectively inhibit the leaching behavior of As and Pb under acid rain, which increased by 99.89% and 90.18%, respectively, compared with the control. The HYDRUS-1D modeling indicated that S/Fe-BC could continuously treat As (100 mg/L) and Pb (1000 mg/L) contaminated water for 16.22 years and 40.86 years, respectively, and ensure the groundwater quality criteria being met. Based on these insights, we believe that our study will provide meaningful information about the potentials of biochar derived materials for soil heavy metals' remediation.
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Affiliation(s)
- Gehui Wang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Muhammad Tariq
- Division of Advanced Nanomaterials, Suzhou Institute of Nano-Tech and Nano- Bionics, Chinese Academy of Sciences (CAS), Suzhou, 215123, China
| | - Weiyu Liang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Jiang Wan
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Cheng Peng
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Wei Zhang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China.
| | - Xinde Cao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Ziyang Lou
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
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12
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Song P, Xu D, Yue J, Ma Y, Dong S, Feng J. Recent advances in soil remediation technology for heavy metal contaminated sites: A critical review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:156417. [PMID: 35662604 DOI: 10.1016/j.scitotenv.2022.156417] [Citation(s) in RCA: 83] [Impact Index Per Article: 41.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 05/29/2022] [Accepted: 05/30/2022] [Indexed: 05/22/2023]
Abstract
With the increasing development of industry and urbanization, heavy metal contaminated sites have become progressively conspicuous, particularly by unreasonable emissions from electroplating, nonferrous metals smelting, mine tailing, etc. In recent years, soil remediation technologies for heavy metal contaminated sites have developed rapidly. New and effective remediation technologies have emerged successively, and more successful practical applications have appeared. Therefore, systematical summarization of the current progress is essential. As a result, in this paper, some mainstream soil remediation technologies for heavy metal contaminated sites, including physical remediation (soil thermal desorption and soil replacement), bioremediation (phytoremediation and microbial remediation), chemical remediation (chemical leaching, chemical stabilization, electrokinetic remediation-permeable reactive barrier, and chemical oxidation/reduction), as well as various combined remediation are comprehensively reviewed. The influencing factors, advantages, disadvantages, remediation mechanism, and practical applications are also deeply discussed. Besides, the corresponding remediation strategies are put forward for the remediation of heavily polluted sites such as the chemical industry, smelting, and tailing areas. Overall, this review will be beneficial for the in-depth understanding and provide references for the reasonable selection and development of soil remediation technology for heavy metal contaminated sites.
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Affiliation(s)
- Peipei Song
- College of Resources and Environment, Shandong Agricultural University, Key Laboratory of Agricultural Environment, National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, Tai'an 271018, PR China.
| | - Dan Xu
- College of Resources and Environment, Shandong Agricultural University, Key Laboratory of Agricultural Environment, National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, Tai'an 271018, PR China
| | - Jingyuan Yue
- College of Resources and Environment, Shandong Agricultural University, Key Laboratory of Agricultural Environment, National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, Tai'an 271018, PR China
| | - Yuanchen Ma
- College of Resources and Environment, Shandong Agricultural University, Key Laboratory of Agricultural Environment, National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, Tai'an 271018, PR China
| | - Shujun Dong
- Hunan University of Arts and Sciences, Changde 415000, PR China
| | - Jing Feng
- PowerChina ZhongNan Engineering Corporation Limited, Changsha 410014, PR China
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13
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Cui H, Dong T, Hu L, Xia R, Zhou J, Zhou J. Adsorption and immobilization of soil lead by two phosphate-based biochars and phosphorus release risk assessment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 824:153957. [PMID: 35183632 DOI: 10.1016/j.scitotenv.2022.153957] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 02/13/2022] [Accepted: 02/14/2022] [Indexed: 06/14/2023]
Abstract
Phosphorus-based biochar can effectively immobilize lead (Pb) in soils, but the effects of soluble and insoluble phosphate on the remediation efficiency of Pb and phosphorus (P) release risks remain largely unknown. In this study, three biochars were produced from reed (Phragmites australis L.) straw, potassium dihydrogen phosphate (PDP, soluble) and hydroxyapatite (HAP, insoluble) modified reed straws and marked as BC, BCP, and BCH, respectively. Pb adsorptions and immobilizations by the three biochars and their P release risks were investigated. The P release kinetics of the three biochars were all fitted with the pseudo-second-order kinetic model and the P-release capacity followed the order of BCP > BCH > BC. The sorption isotherms of Pb2+ by three biochars were better described using the Langmuir model and the maximum adsorption capacities of BCP (59.3 mg/g) and BCH (58.8 mg/g) were higher than that of BC (48.1 mg/g). However, the P concentrations remained in BCP treated solution were significantly higher than those in BCH and BC under initial Pb2+ concentrations in the ranges of 5-25 mg/L. Soil pH and available P were increased with the increasing dosage of BCP and BCH, decreasing CaCl2-extractable Pb concentrations. BCH was more effective to decrease the exchangeable Pb and transform it into iron/manganese oxides and residual fractions. Compared to BC, BCH applications in the range of 2-5% can significantly increase labile P by 15.2-17.7%, but 21.0-33.6% for BCP, indicating BCP had a higher P release risk. The major implication is that HAP-modified biochar can effectively immobilize Pb and decrease P release risks compared to soluble P-modified biochar.
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Affiliation(s)
- Hongbiao Cui
- School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China; Institute of Environment-friendly Materials and Occupational Health, Anhui University of Science and Technology, Wuhu 241003, China; Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy Sciences, Nanjing 210008, China; Engineering Laboratory of Anhui Province for Comprehensive Utilization of Water and Soil Resources and Construction of Ecological Protection in Mining Area With High Groundwater Level, Anhui University of Science and Technology, Huainan 232001, China.
| | - Tingting Dong
- School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China; Institute of Environment-friendly Materials and Occupational Health, Anhui University of Science and Technology, Wuhu 241003, China; Engineering Laboratory of Anhui Province for Comprehensive Utilization of Water and Soil Resources and Construction of Ecological Protection in Mining Area With High Groundwater Level, Anhui University of Science and Technology, Huainan 232001, China
| | - Longlong Hu
- School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China; Institute of Environment-friendly Materials and Occupational Health, Anhui University of Science and Technology, Wuhu 241003, China; Engineering Laboratory of Anhui Province for Comprehensive Utilization of Water and Soil Resources and Construction of Ecological Protection in Mining Area With High Groundwater Level, Anhui University of Science and Technology, Huainan 232001, China
| | - Ruizhi Xia
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy Sciences, Nanjing 210008, China
| | - Jing Zhou
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy Sciences, Nanjing 210008, China
| | - Jun Zhou
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy Sciences, Nanjing 210008, China; Department of Environmental, Earth, and Atmospheric Sciences, University of Massachusetts, Lowell, MA 01854, United States.
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14
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Zhao J, Mowla M, Pan Z, Bao D, Giammar DE, Hu Y, Louie SM. Lead phosphate deposition in porous media and implications for lead remediation. WATER RESEARCH 2022; 214:118200. [PMID: 35228037 DOI: 10.1016/j.watres.2022.118200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 02/13/2022] [Accepted: 02/14/2022] [Indexed: 06/14/2023]
Abstract
Phosphate addition is commonly applied as an effective method to remediate lead contaminated sites via formation of low solubility lead phosphate solids. However, subsequent transport of the lead phosphate particles may impact the effectiveness of this remediation strategy. Hence, this study investigates the mechanisms involved in the aggregation of lead phosphate particles and their deposition in sand columns as a function of typical water chemistry parameters. Clean bed filtration theory was evaluated to predict the particle deposition behavior, using Derjaguin-Landau-Verwey-Overbeek (DLVO) theory to estimate particle-substrate interactions. The observed particle deposition was not predictable from the primary energy barrier in clean bed filtration models, even in simple monovalent background electrolyte (NaNO3), because weak deposition in a secondary energy minimum prevailed even at low ionic strength, and ripening occurred at ionic strengths of 12.5 mM or higher. For aged (aggregated) suspensions, straining also occurred at 12.5 mM or higher. Aggregation and deposition were further enhanced at low total P/Pb ratios (i.e., P/Pb = 1) and in the presence of divalent cations, such as Ca2+ (≥ 0.2 mM), which resulted in less negative particle surface potentials and weaker electrostatic repulsion forces. However, the presence of 5 mg C/L of humic acid induced strong steric or electrosteric repulsion, which hindered particle aggregation and deposition even in the presence of Ca2+. This study demonstrates the importance of myriad mechanisms in lead phosphate deposition and provides useful information for controlling water chemistry in phosphate applications for lead remediation.
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Affiliation(s)
- Juntao Zhao
- Department of Civil & Environmental Engineering, University of Houston, Houston, TX 77004, United States
| | - Marfua Mowla
- Department of Civil & Environmental Engineering, University of Houston, Houston, TX 77004, United States
| | - Zezhen Pan
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China
| | - Daniel Bao
- Department of Civil & Environmental Engineering, University of Houston, Houston, TX 77004, United States
| | - Daniel E Giammar
- Department of Energy, Environmental and Chemical Engineering, Washington University, St. Louis, MO 63130, United States
| | - Yandi Hu
- Department of Civil & Environmental Engineering, University of Houston, Houston, TX 77004, United States; College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China; State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, Beijing 100871, China.
| | - Stacey M Louie
- Department of Civil & Environmental Engineering, University of Houston, Houston, TX 77004, United States.
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15
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Wang G, Peng C, Tariq M, Lin S, Wan J, Liang W, Zhang W, Zhang L. Mechanistic insight and bifunctional study of a sulfide Fe 3O 4 coated biochar composite for efficient As(III) and Pb(II) immobilization in soils. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 293:118587. [PMID: 34843845 DOI: 10.1016/j.envpol.2021.118587] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/29/2021] [Accepted: 11/25/2021] [Indexed: 06/13/2023]
Abstract
Trace elements contamination in soil has aroused global concern nowadays, but the efficient, multifunctional, and economically viable method still remains a major challenge. In this research study, a sulfide Fe3O4 coated biochar composite (S/Fe-BC) has been synthesized successfully and applied to As(III)/Pb(II) co-contaminated soil. The immobilization efficiency of S/Fe-BC (2%) for the two elements exceeded 90%, and could ensure the synchronous and efficient immobilization in a wide range of pH (4.0-8.0). The TCLP-As and Pb amounts were sharply dropped after 28 days of stabilization; Meanwhile, a majority of exchangeable and carbonate-bound fractions of As and Pb were transferred into the less accessible residuals. Compared with Fe3O4 coated BC, the good immobilization performance of S/Fe-BC was mainly related to the enhancement of specific surface area, improvement of ionic exchange process, followed by the increase of Pb(II) precipitation and As(III) oxidation. Furthermore, competitive and synergistic effects were observed. In depth characterization analyses revealed the simultaneous immobilization mechanisms involving the adsorption, precipitation (Pb(OH)2, PbSO4, and PbS), co-precipitation (PbFeAsO4(OH)), and oxidation. Conclusively, outstanding performance of S/Fe-BC composite is considered as a good multifunctional potential candidate for the immobilization of trace elements from a soil system.
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Affiliation(s)
- Gehui Wang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Cheng Peng
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Muhammad Tariq
- Division of Advanced Nanomaterials, Suzhou Institute of Nano-Tech and Nano- Bionics, Chinese Academy of Sciences (CAS), Suzhou, 215123, China
| | - Sen Lin
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Jiang Wan
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Weiyu Liang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Wei Zhang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China.
| | - Lehua Zhang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China
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16
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Three types of passivators on the stabilization of exogenous lead-contaminated soil with different particle sizes. Sci Rep 2021; 11:22542. [PMID: 34799608 PMCID: PMC8604904 DOI: 10.1038/s41598-021-01685-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Accepted: 11/01/2021] [Indexed: 11/23/2022] Open
Abstract
Study on the form partitioning and content of heavy metals in soil particles with different sizes is crucial for preventing and controlling heavy metals pollution, but few studies regard soil contaminated by heavy metals as a homogeneous body. In this study (Fig. 1), goat manure, lime and phosphate were used to stabilize exogenous lead (Pb). These soil passivators’ differential effects on total Pb and Pb with different chemical forms in soil particles of different sizes as well as Pb immobilization in soil were investigated. By passivation experiment in laboratory for 45 days, the passivation effect of the single and combined application treatments on exogenous Pb and partitioning characteristics were analyzed and compared. The characterization method of fine sand microstructure and mineral composition analysis was used. The results showed that the single application of P5 and combined application of LP5 had optimum passivation efficiency. The content of DTPA-Pb was reduced with P5 by 65.27% and the percentage of available Pb decreased significantly in soil particles of the four sizes. The content of TCLP-Pb and available Pb (weak acid extraction and reducible Pb) significantly decreased by 71.60 and 25.12% respectively after the application of LP5 in the original soil. Furthermore, most of the total Pb was enriched in coarse sand and clay, while its content was lower in fine sand and silt. The combined application treatment of GL5 significantly increased the content of weak acid extractable and reducible Pb in fine sand, silty sand and clay. Through SEM and XRD analysis, it was found that the diffraction peak of P5 treatment groups might be related to the formation of insoluble Pb that contained compounds, which were mainly mineral components, including quartz, feldspar and mica, and LP showed a big potential in the study on passivation of heavy metal Pb-contaminated soil in the natural environment. In conclusion, further studies on the different dosage and metal-contamination levels as well as different combination forms of passivators should be considered under natural conditions, the selection of suitable passivators according to soil texture is of great significance for remediation of Pb-contaminated soil.
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17
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Pei L, Yang F, Xu X, Nan H, Gui X, Zhao L, Cao X. Further reuse of phosphorus-laden biochar for lead sorption from aqueous solution: Isotherm, kinetics, and mechanism. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 792:148550. [PMID: 34465039 DOI: 10.1016/j.scitotenv.2021.148550] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/03/2021] [Accepted: 06/15/2021] [Indexed: 06/13/2023]
Abstract
Biochar and engineered biochar have been used for phosphorous recovery from wastewater, but the resulted phosphorous-laden (P-laden) biochar needs further disposal. In this study, the feasibility of reusing P-laden biochar for Pb immobilization as well as the underlying mechanism was explored. Three types of engineered biochar, i.e., Ca modified biochar, Mg modified biochar, and Fe modified biochar, were selected to sorb P and then the exhausted biochar was further used for Pb sorption. Results showed that Mg and Ca modified biochar exhibited considerable Pb sorption capacity after P sorption with the maximum value of 3.36-4.03 mmol/g and 5.49-6.58 mmol/g, respectively, while P-laden Fe modified biochar failed to sorb Pb due to its acidic pH. The removal of Pb by P-laden Mg modified biochar involved more precipitation including PbHPO4, Pb5(PO4)3(OH), and Pb3(CO3)2(OH)2 because of its higher P sorption capacity and more -OH group on the surface. Cation exchange with CaCO3 to form PbCO3 was the main mechanism for Pb removal by P-laden Ca modified biochar despite the formation of Pb5(PO4)3(OH) precipitate. Our results demonstrate that waste P-laden biochar can be further used for the effective removal of Pb, which provides a potential approach for waste adsorbent disposal.
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Affiliation(s)
- Lei Pei
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fan Yang
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Xiaoyun Xu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Hongyan Nan
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiangyang Gui
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ling Zhao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xinde Cao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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18
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Zhou D, Han X, Zhang Y, Wei W, Green CT, Sun H, Zheng C. Co-transport of biogenic nano-hydroxyapatite and Pb(II) in saturated sand columns: Controlling factors and stochastic modeling. CHEMOSPHERE 2021; 275:130078. [PMID: 33984912 DOI: 10.1016/j.chemosphere.2021.130078] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 01/29/2021] [Accepted: 02/21/2021] [Indexed: 06/12/2023]
Abstract
Biogenic nano-hydroxyapatite (bio-nHAP) has recently gained great interest in many domains, especially in the remediation of heavy metal-contaminated soil, due to its high reactivity, low cost, and eco-friendly nature. The co-transport and reaction of bio-nHAP with Pb(II) in saturated porous media, however, are not well understood. This work investigated the effects of ionic strength (IS), ionic composition (IC), dissolved organic matter (DOM), and flow velocity on transport-reaction dynamics of Pb(II) and bio-nHAP by combining column breakthrough experiments and model simulations. Results showed that the mobility of Pb(II) was significantly enhanced with increasing IS/IC but less affected by flow velocity during the transport-reaction process of bio-nHAP and Pb(II) in the saturated sand column; while the transport of bio-nHAP was restricted by increasing IS/IC but facilitated by increasing velocity. IC, IS, and velocity only slightly affected the reaction kinetics between Pb(II) and bio-nHAP, likely due to the fast reaction rate between Pb(II) and bio-nHAP and precipitation of pyromorphite. The transport dynamics of bio-nHAP and Pb(II) were significantly changed by DOM, and this effect depended strongly on the type of DOM with different molecular weights. Breakthrough curves of Pb(II) and bio-nHAP exhibited apparent "anomalous", sub-diffusive transport behaviors, which could be well quantified by a novel tempered fractional derivative bimolecular reaction equation (T-FBRE). Our findings highlighted the accurate simulation of the co-transport and reaction of bio-nHAP with Pb(II) using T-FBRE and had a great benefit for risk assessment and remediation strategy development for Pb(II) contaminated soil.
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Affiliation(s)
- Dongbao Zhou
- State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, College of Mechanics and Materials, Hohai University, Nanjing, 210098, China
| | - Xuan Han
- School of Environment, Nanjing Normal University, Nanjing, 210023, China
| | - Yong Zhang
- Department of Geological Sciences, University of Alabama, Tuscaloosa, AL, 35487, USA.
| | - Wei Wei
- School of Environment, Nanjing Normal University, Nanjing, 210023, China.
| | | | - HongGuang Sun
- State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, College of Mechanics and Materials, Hohai University, Nanjing, 210098, China
| | - Chunmiao Zheng
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science & Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
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19
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Shu S, Li Y, Zhu W, Wu S, Wu Y, Hou H. Comparing desorption properties of pollutants on bentonite particles and in compacted bentonite. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 211:111940. [PMID: 33476849 DOI: 10.1016/j.ecoenv.2021.111940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 01/07/2021] [Accepted: 01/11/2021] [Indexed: 06/12/2023]
Abstract
Desorption is one of the main factors causing groundwater and soil pollution. Therefore, the study of clay desorption characteristics is important for the prediction of groundwater and soil pollution. In previous studies, batch tests and column tests were used to study the desorption characteristics of pollutants on clay. However, the desorption parameters obtained via the two test methods were often quite different. To investigate differences in the desorption characteristics of different pollutants on clay particles and in compacted clay, batch and column desorption tests were conducted using cadmium chloride, fulvic acid, and sodium phosphate as the adsorbates and bentonite as the adsorbent. It was found that the unit particle surface area desorption distribution coefficients of pollutants on bentonite particles were approximately equal to the unit pore surface area distribution coefficients of pollutants in compacted bentonite. This indicates that the desorbed amount per unit of surface area is basically consistent, regardless of whether they are sorbed on particles or in compacted bentonite. A simple formula for determining the desorption retardation factor of pollutants in compacted bentonite is presented. The results of this study provide a reference for the prediction and evaluation of groundwater and soil pollution.
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Affiliation(s)
- Shi Shu
- Key laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210024, China.
| | - Yunquan Li
- Huadong Engineering Corporation Limited, Power China, Hangzhou 310000, China
| | - Wei Zhu
- Key laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210024, China; College of Environment, Hohai University, Nanjing 210024, China
| | - Silin Wu
- Key laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210024, China
| | - Yong Wu
- Key laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210024, China
| | - Hao Hou
- Key laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210024, China
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20
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Chen X, Dai Y, Fan J, Xu X, Cao X. Application of iron-biochar composite in topsoil for simultaneous remediation of chromium-contaminated soil and groundwater: Immobilization mechanism and long-term stability. JOURNAL OF HAZARDOUS MATERIALS 2021; 405:124226. [PMID: 33087289 DOI: 10.1016/j.jhazmat.2020.124226] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 09/26/2020] [Accepted: 10/07/2020] [Indexed: 06/11/2023]
Abstract
This study was aimed to prove the effectiveness and practicability of an integrated technology for simultaneous remediation of Cr-contaminated soil and groundwater. The remediation system was built by pumping Cr-contaminated groundwater into top contaminated soil round after round, enabling the pre-applied iron-biochar composite (Fe-BC) in topsoil to stabilize Cr from both groundwater and soil. Immobilization ability and mechanism of Cr in soil were explored by toxicity characteristic leaching procedure test, scanning electron microscopy-elemental mapping, and X-ray photo spectroscopy. Hydrus-1D software was used to examine the long-term stability of immobilized Cr in soil. Results showed that Fe-BC-amended soil could remove about 71% Cr from contaminated groundwater. Meanwhile, Cr from both groundwater and soil was simultaneously immobilized in topsoil, leachability of Cr in which was reduced by over 81%. The immobilization of Cr in soil was attributed to the reduction of Cr(VI) into Cr(III) to form stable CrxFe(1-x)(OH)3. After remediation, the average transport rate of Cr in the soil profile was only 0.420 cm y-1 along with the local rainfall. Our study demonstrated that integrated technology could effectively remove Cr from groundwater and stabilize Cr in soil and the simultaneous remediation target for both soil and groundwater reached.
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Affiliation(s)
- Xiang Chen
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yihan Dai
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jin Fan
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiaoyun Xu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xinde Cao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Engineering Research Center of Solid Waste Treatment and Recycling, Shanghai Jiao Tong University, Shanghai 200240, China.
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21
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Yuan C, Gao B, Peng Y, Gao X, Fan B, Chen Q. A meta-analysis of heavy metal bioavailability response to biochar aging: Importance of soil and biochar properties. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 756:144058. [PMID: 33288251 DOI: 10.1016/j.scitotenv.2020.144058] [Citation(s) in RCA: 72] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 11/03/2020] [Accepted: 11/23/2020] [Indexed: 06/12/2023]
Abstract
Biochar has been widely applied to remediate the heavy metal-polluted soils, whereas biochar aging can induce the changes of the biochar physic-chemical properties. Afterwards, the bioavailability of heavy metals (BHM) will vary in soils which likely increase the unstable fractions of heavy metals and the following environmental risks. To explore the biochar aging effects on the BHM changes in responses to the variation of experimental conditions and biochar properties, a meta-analysis for the literatures published before May 2020 was conducted. A sum of 257 independent observations from 22 published papers was obtained. The results from the analysis of boosted regression tree showed that the soil pH was the most important factor influencing the BHM changes in biochar amended soil, followed by soil texture, aging time and biochar pyrolysis temperature. The results of this review showed that the BHM was decreased by 16.9%, 28.7% and 6.4% in weakly acid soil (pH 6.00-6.99), coarse- and medium-textured soils, respectively, but increased by 149% and 121% in the alkaline (pH > 8.00) and fine-textured soils. The BHM declined in the soils amended with biochar pyrolyzed at relative high temperature (> 500 °C), and increased during aging in soils amended with biochar pyrolyzed at relatively low temperature (401-500 °C). In terms of diverse immobilized heavy metals, only bioavailable Zn in soil decreased after aging. However, there was no significant changes in Cd, Cu and Pb's bioavalability. Besides, the BHM was decreased by 18.6% within the short-term (less than one year) biochar aging, while showed inverse trend during the longer aging processes. Besides, the application of lignin-enriched biochar may counteract the positive effects of the biochar aging on BHM. Our works may promote the interpretation of the interference factors on the BHM changes and filled the research gaps on biochar aging process in soils.
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Affiliation(s)
- Chengpeng Yuan
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Baolin Gao
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Yutao Peng
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Xing Gao
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Beibei Fan
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Qing Chen
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.
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Yan Y, Li Q, Yang J, Zhou S, Wang L, Bolan N. Evaluation of hydroxyapatite derived from flue gas desulphurization gypsum on simultaneous immobilization of lead and cadmium in contaminated soil. JOURNAL OF HAZARDOUS MATERIALS 2020; 400:123038. [PMID: 32947730 DOI: 10.1016/j.jhazmat.2020.123038] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 05/18/2020] [Accepted: 05/22/2020] [Indexed: 06/11/2023]
Abstract
Flue gas desulphurization gypsum (FGD) is a major solid waste in coal-fired energy plants, and the appropriate reuse of this resources is still a major challenge. In this study, the feasibility of FGD as a calcium source to produce hydroxyapatite (FGD-HAP) for the immobilization of lead (Pb) and cadmium (Cd) in spiked soil was investigated. The effects of FGD and FGD-HAP on soil properties and redistribution, bioaccessibility and plant uptake of Pb and Cd were examined. Results showed that application of FGD and FGD-HAP could significantly improve the enzymes activities of contaminated soils, but the effectiveness was more pronounced with FGD-HAP. Addition of only 1% FGD-HAP could effectively reduce bioavailable Pb and Cd concentration in soil as measured by CaCl2 extraction by 60.6% and 65.4%, respectively. On the other hand, plant available Pb and Cd could significantly decrease by 93.8% and 73.2% after amendment of 5% FGD-HAP. Significant changes in the micro-scale distribution of heavy metals before and after FGD-HAP treatment demonstrated that while heavy metals were predominantly associated with iron/manganese oxides in untreated soil, high correlation between heavy metals and phosphorus/sulfur was observed in FGD-HAP treated soil. In addition, results of the leaching tests showed that incorporation of FGD-HAP enhanced the retention capacity of heavy metals in soil, indicating that application of FGD-HAP could diminish the environmental risk of leachable heavy metals to groundwater. Overall, this study highlighted the potential value of FGD-HAP as a low-cost and high-efficient amendment for remediation of Pb and Cd contaminated soils.
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Affiliation(s)
- Yubo Yan
- Jiangsu Engineering Laboratory for Environment Functional Materials, Huaiyin Normal University, Huai'an, 223300, China; Institute of Environmental and Sustainable Development in Agriculture, Chinese Academy of Agricultural Science, Beijing, 100081, China
| | - Qiao Li
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Jianjun Yang
- Institute of Environmental and Sustainable Development in Agriculture, Chinese Academy of Agricultural Science, Beijing, 100081, China.
| | - Shouyong Zhou
- Jiangsu Engineering Laboratory for Environment Functional Materials, Huaiyin Normal University, Huai'an, 223300, China
| | - Lianjun Wang
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Nanthi Bolan
- Global Centre for Environmental Remediation, University of Newcastle, Callaghan Campus, NSW, 2308, Australia; Cooperative Research Centre for High Performance Soil (Soil CRC), Callaghan, NSW, 2308, Australia
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23
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Immobilization of Heavy Metals in Contaminated Soils—Performance Assessment in Conditions Similar to a Real Scenario. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10227950] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Soil “health” is becoming an increasing concern of modern societies, namely, at the European level, considering its importance to the fields of food, clean water, biodiversity, and even climate change control. On the other hand, human activities are contributing more and more to induce contamination in soils, especially in industrialized societies. This experimental work studies different additives (carbon nanotubes, clay, and Portland cement) with the aim to evaluate their effect on heavy metals, HMs (lead, cooper, nickel, and zinc) immobilization in a contaminated soil in conditions similar to a real scenario. Suspension adsorption tests (fluid-like condition) were performed aiming to supply preliminary information about the adsorption capacity of the soil towards the different HMs tested, while percolation tests (solid-like conditions) were performed aiming to evaluate the HMs immobilization by different additives in conditions similar to a real situation of soil contamination. Results showed that soil particles alone were able to retain considerable amounts of HMs (especially Pb and Cu) which is linked to their fine grain size and the soil high organic matter content. In conditions of good dispersion of the additives, addition of carbon nanotubes or clay can rise the HMs adsorption, except in the case of Zn2+ due to its low electronegativity and high mobility. Moreover, the addition of cement to the soil showed a high capacity to immobilize the HMs which is due to the chemical fixation of the HMs to binder hydration products. In this case, HMs immobilization comes associated with a soil stabilization strategy. The results allow to conclude that the additives, carbon nanotubes and clay, have the potential to minimize HMs mobility in contaminated soils and can be a valid alternative to the usual additive, Portland cement, when tested in conditions similar to a real on-site situation, if the objective is not to induce also soil stabilization, for instance, to enable its use for construction purposes. The results obtained can help designers and decision-makers in the choice of the best materials to remediate HMs contaminated soils.
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Wang Z, Zhang J, Wu Q, Han X, Zhang M, Liu W, Yao X, Feng J, Dong S, Sun J. Magnetic supramolecular polymer: Ultrahigh and highly selective Pb(II) capture from aqueous solution and battery wastewater. CHEMOSPHERE 2020; 248:126042. [PMID: 32032878 DOI: 10.1016/j.chemosphere.2020.126042] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 01/13/2020] [Accepted: 01/26/2020] [Indexed: 05/12/2023]
Abstract
For the practical capture of heavy metal ions from wastewater, fabricating environmental friendly adsorbents with high stability and super adsorption capacity are pursuing issue. In this work, we develop magnetic supramolecular polymer composites (M-SMP) by using a simple two-step hydrothermal method. Systematical characterizations of morphological, chemical and magnetic properties were conducted to confirm the formation of M-SMP composites. The resulting M-SMP composites were applied to remove Pb(II) from aqueous solution and from real battery wastewater, and easy separation was achieved using a permanent magnet. By investigating the effects of various parameters, we optimized their operating condition for Pb(II) adsorption by the M-SMP. The uptake of Pb(II) onto M-SMP fitted well the pseudo-second-order and Langmuir isotherm models, and favourable thermodynamics showed a spontaneous endothermic process. The SMP endowed M-SMP with ultrahigh adsorption capacity for Pb(II) (946.9 mg g-1 at pH = 4.0, T = 298 K), remarkable selectivity, satisfactory stability and desirable recyclability. In Pb-contaminated lead-acid battery industrial wastewater, the concentration of Pb(II) declined from 18.070 mg L-1 to 0.091 mg L-1, which meets the current emission standard for the battery industry. These merits, combined with simple synthesis and convenient separation, make M-SMP an outstanding scavenger for the elimination of industrial Pb(II) wastewater.
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Affiliation(s)
- Zongwu Wang
- MOE Key Laboratory of Yellow River and Huai River Water Environmental and Pollution Control, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang, Henan, 453007, PR China; School of Environment Engineering, Yellow River Conservancy Technical Institute, Henan Engineering Technology Research Center of Green Coating Materials, Kaifeng, Henan, 475004, PR China
| | - Jing Zhang
- MOE Key Laboratory of Yellow River and Huai River Water Environmental and Pollution Control, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang, Henan, 453007, PR China; Sanmenxia Polytechnic, Sanmenxia, Henan, 472000, PR China
| | - Qing Wu
- MOE Key Laboratory of Yellow River and Huai River Water Environmental and Pollution Control, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang, Henan, 453007, PR China
| | - Xuexue Han
- MOE Key Laboratory of Yellow River and Huai River Water Environmental and Pollution Control, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang, Henan, 453007, PR China
| | - Mengna Zhang
- MOE Key Laboratory of Yellow River and Huai River Water Environmental and Pollution Control, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang, Henan, 453007, PR China
| | - Wei Liu
- School of Environment Engineering, Yellow River Conservancy Technical Institute, Henan Engineering Technology Research Center of Green Coating Materials, Kaifeng, Henan, 475004, PR China
| | - Xinding Yao
- School of Environment Engineering, Yellow River Conservancy Technical Institute, Henan Engineering Technology Research Center of Green Coating Materials, Kaifeng, Henan, 475004, PR China
| | - Jinglan Feng
- MOE Key Laboratory of Yellow River and Huai River Water Environmental and Pollution Control, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang, Henan, 453007, PR China
| | - Shuying Dong
- MOE Key Laboratory of Yellow River and Huai River Water Environmental and Pollution Control, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang, Henan, 453007, PR China.
| | - Jianhui Sun
- MOE Key Laboratory of Yellow River and Huai River Water Environmental and Pollution Control, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang, Henan, 453007, PR China.
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25
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Yan Y, Qi F, Zhao S, Luo Y, Gu S, Li Q, Zhang L, Zhou S, Bolan N. A new low-cost hydroxyapatite for efficient immobilization of lead. J Colloid Interface Sci 2019; 553:798-804. [DOI: 10.1016/j.jcis.2019.06.090] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 06/24/2019] [Accepted: 06/25/2019] [Indexed: 12/11/2022]
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26
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Huang CS, Tong C, Hu WS, Yeh HD, Yang T. Analysis of radially convergent tracer test in a two-zone confined aquifer with vertical dispersion effect: Asymmetrical and symmetrical transports. JOURNAL OF HAZARDOUS MATERIALS 2019; 377:8-16. [PMID: 31132680 DOI: 10.1016/j.jhazmat.2019.05.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 05/05/2019] [Accepted: 05/17/2019] [Indexed: 06/09/2023]
Abstract
Radially convergent tracer test (RCT) with an extraction well and a tracer injection well is commonly conducted for determining aquifer dispersivity associated with the spreading of contamination plume. A variety of analytical models for RCT have been proposed, but the effects of skin zone and vertical dispersion are rarely explored. In addition, little attention is paid to the validity of those analytical models assuming asymmetrical tracer transport (ATT) as radially symmetrical transport (RST) toward the pumping well. This study develops a new analytical model for RCT subject to the above-mentioned effects in a confined aquifer with a skin zone around the wellbore. The Laplace-domain solution of the model for a continuous or instantaneous input is developed. A finite element solution (FES) for ATT is also developed to verify the Laplace-domain solution based on RST. Results suggest ATT can be regarded as RST in predicting the breakthrough curve (BTC) at the pumping well when four quantitative conditions are met. A lumped dimensionless parameter dominates those two effects on the BTC. Both the FES and Laplace-domain solution agree with monitored concentration data from a field RCT.
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Affiliation(s)
- Ching-Sheng Huang
- State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Center for Global Change and Water Cycle, Hohai University, Nanjing 210098, China; College of Hydrology and Water Resources, Hohai University, Nanjing, 210098, China
| | - Chenchen Tong
- College of Hydrology and Water Resources, Hohai University, Nanjing, 210098, China
| | - Wei-Shan Hu
- Institute of Environmental Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Hund-Der Yeh
- Institute of Environmental Engineering, National Chiao Tung University, Hsinchu 300, Taiwan.
| | - Tao Yang
- State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Center for Global Change and Water Cycle, Hohai University, Nanjing 210098, China; College of Hydrology and Water Resources, Hohai University, Nanjing, 210098, China.
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27
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González-Costa JJ, Reigosa-Roger MJ, Matías JM, Fernández-Covelo E. Analysis of the adsorption and retention models for Cd, Cr, Cu, Ni, Pb, and Zn through neural networks: selection of variables and competitive model. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:25551-25564. [PMID: 29959735 DOI: 10.1007/s11356-018-2101-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 04/23/2018] [Indexed: 06/08/2023]
Abstract
In this study, the neural networks are used to predict and explain the behavior of different edaphological variables in the adsorption and retention of heavy metals, both isolated and competing. A comparison with the results obtained using multiple regression, stepwise analysis, and regression trees is performed. In the neural network technique, CEC amorphous and crystallized oxides and kaolinite in the clay fraction are the most selected variables for making the optimal models, while mica and, to a lesser extent, plagioclase, are the next variables selected. Additionally, a competitive model has been considered, using simultaneously different metals. In the competitive model, the model predicts a more intense competence between Pb and Ni for the adsorption process and between Cr and Ni for the retention process.
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Affiliation(s)
| | | | - José M Matías
- Department of Statistics and Operational Research, Universidad de Vigo, Vigo, Spain
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