1
|
Khan BA, Iqbal S, Khattak JA, Bolan N, Ahmad M. Enhancing the stability of soil contaminated with fluoride through the utilization of pristine and aluminium-impregnated biochar: a comprehensive mechanistic approach. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-34951-x. [PMID: 39317897 DOI: 10.1007/s11356-024-34951-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Accepted: 09/05/2024] [Indexed: 09/26/2024]
Abstract
The effect of trivalent metal-modified biochar on the stability and mitigation of fluoride ions (F-) in contaminated soils remains largely unexplored, despite biochar's extensive application in F--contaminated soil. The mineral metal-modified biochar has the potential to serve as an efficient solution for soil contaminated with F-. In this study, pristine-pinecone biochar (P-BC) and AlCl3-modified pinecone biochar (A-BC) were synthesized and then utilized to remediate the soil that had been contaminated with F-. Both P-BC and A-BC efficiently immobilized F- within the contaminated soil. Further examinations through sequential extraction procedure and subsequent analysis using scanning electron microscopy (SEM), energy dispersive X-ray (EDX), and elemental dot mapping demonstrated a transformation of F- into a more stable state by A-BC treatment of the contaminated soil. This implies that A-BC may possess the capacity to function as an efficient ameliorant for immobilizing F- within the soil.
Collapse
Affiliation(s)
- Basit Ahmed Khan
- Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
- UWA School of Agriculture and Environment, and The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, 6001, Australia
| | - Sajid Iqbal
- Department of Nuclear & Quantum Engineering, Korea Advance Institute of Science and Technology (KAIST), 291-Daehak-ro, Yuseong-gu, Daejeon, 34141, Korea
| | - Junaid Ali Khattak
- Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
- Department of Earth and Environmental Sciences, Hazara University, Mansehra, Pakistan
| | - Nanthi Bolan
- UWA School of Agriculture and Environment, and The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, 6001, Australia
| | - Mahtab Ahmad
- Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan.
| |
Collapse
|
2
|
Lu L, Lei M, Zhou Y, Cui H, Du H. In vitro tungsten bioaccessibility in Chinese residential soils: Implications for human health risk assessments and soil screening level derivation. JOURNAL OF HAZARDOUS MATERIALS 2024; 477:135368. [PMID: 39079296 DOI: 10.1016/j.jhazmat.2024.135368] [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: 05/11/2024] [Revised: 07/10/2024] [Accepted: 07/27/2024] [Indexed: 08/17/2024]
Abstract
Tungsten (W) contamination presents emerging environmental challenges, necessitating the need to establish soil screening levels (SSLs), especially for residential soils. This study assessed the health exposure risk and derived national and regional residential SSLs for W in Chinese residential soils, incorporating machine-learning prediction of in-vitro soil W bioaccessibility. We analyzed 204 residential soil samples collected across 24 provinces, recording a wide range of W concentrations (0.01-3063.2 mg/kg). Synchrotron-based X-ray fluorescence spectroscopy, chemical extractions, and random forest modeling indicated that the key determinants of soil W bioaccessibility were soil pH, cation exchange capacity, organic matter, and clay contents. Monte Carlo simulations demonstrated that soil W contamination predominantly results in noncarcinogenic health risks to residents via oral exposure, especially in mining-affected regions. A national residential SSL (NRSSL) of 35.5 mg/kg and regional residential SSLs (RRSSLs) of 34.5-49.2 mg/kg were established. Incorporating predicted bioaccessibility increased the NRSSL to 73.8 mg/kg and the RRSSLs to 69.8-112.5 mg/kg. Southern China, which is rich in W ore, exhibited lower RRSSLs, underscoring a need for enhanced safety management. Our framework and findings provide a robust scientific foundation for future soil contamination risk assessment studies, and we present customized SSLs that can guide targeted W risk control strategies.
Collapse
Affiliation(s)
- Lei Lu
- College of Environment & Ecology, Hunan Agricultural University, 410127 Changsha, China
| | - Ming Lei
- College of Environment & Ecology, Hunan Agricultural University, 410127 Changsha, China
| | - Yaoyu Zhou
- College of Environment & Ecology, Hunan Agricultural University, 410127 Changsha, China
| | - Haojie Cui
- College of Resources, Hunan Agricultural University, 410127 Changsha, China
| | - Huihui Du
- College of Environment & Ecology, Hunan Agricultural University, 410127 Changsha, China.
| |
Collapse
|
3
|
Bouzar B, Benzerzour M, Abriak NE. Innovative reuse of mineral waste for treatment of a contaminated soil by fluorine: synthesis of hydroxyapatite (HAP) and chemical performance assessments. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-34452-x. [PMID: 39066942 DOI: 10.1007/s11356-024-34452-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Accepted: 07/18/2024] [Indexed: 07/30/2024]
Abstract
This research aimed to introduce a novel method for the valorization of mineral waste, focusing on the development of hydroxyapatite (HAP) as an effective and economical adsorbent for immobilizing fluoride ions (F-) in soil. Hydroxyapatites were produced through the reaction between potassium dihydrogen phosphate (KH2PO4) and calcium-abundant limestone soil (CLS). X-ray diffraction analyses revealed that the primary phases in HAPCLS were brushite (CaHPO5·2H2O) and hydroxyapatite (Ca10(PO4)6(OH)2). The FTIR spectra exhibited characteristics akin to natural HAP, including the presence of orthophosphate groups (PO43-), hydroxyl groups (OH-), and both A/B types of carbonates in the apatite structure. The morphology of the synthesized HAP, as observed through SEM-EDS, was consistent with that of phosphocalcic hydroxyapatite crystals. The EDS results indicated a Ca/P atomic ratio of 1.7 for HAPCLS, aligning closely with the typical hydroxyapatite stoichiometry (Ca/P = 1.67). The application of HAP to reduce fluoride (F-) levels in soil proved to be successful; introducing 1% of various HAP formulations reduced the fluoride concentration from 51.4 mg/kg in untreated soil to levels below the IWSI limit (10 mg/kg), achieving a reduction to 8.1 mg/kg for HAPCLS. The sequential extraction of fluoride demonstrated that after soil treatment, fluoride was predominantly removed from the residual fraction (Fraction 4) and was effectively sequestered by the hydroxyapatites (Ca10(PO4)6(OH)2) through anionic exchange with hydroxide ions (OH-), resulting in the formation of stable and insoluble fluorapatite (Ca10(PO4)6F2).
Collapse
Affiliation(s)
- Bader Bouzar
- IMT Nord Europe, Centre for Materials and Processes, Institut Mines-Télécom, 59000, EnvironnementLille, France.
- Laboratoire de Génie Civil Et Géo-Environnement, Univ. Lille, Univ., ULR 4515 - LGCgE, F-59000, Lille, France.
| | - Mahfoud Benzerzour
- IMT Nord Europe, Centre for Materials and Processes, Institut Mines-Télécom, 59000, EnvironnementLille, France
- Laboratoire de Génie Civil Et Géo-Environnement, Univ. Lille, Univ., ULR 4515 - LGCgE, F-59000, Lille, France
| | - Nor-Edine Abriak
- IMT Nord Europe, Centre for Materials and Processes, Institut Mines-Télécom, 59000, EnvironnementLille, France
- Laboratoire de Génie Civil Et Géo-Environnement, Univ. Lille, Univ., ULR 4515 - LGCgE, F-59000, Lille, France
| |
Collapse
|
4
|
Attanayake CP, Hettiarachchi GM, Dissanayake AI, Ma Q. Organic amendments temporarily change arsenic speciation and bioaccessibility in a lead and arsenic co-contaminated urban soil. JOURNAL OF ENVIRONMENTAL QUALITY 2024; 53:535-545. [PMID: 38816343 DOI: 10.1002/jeq2.20575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 04/28/2024] [Indexed: 06/01/2024]
Abstract
Organic amendments often reduce the bioaccessibility of soil lead (Pb) but not that of soil arsenic (As). The effect of Pb on As bioaccessibility is rarely studied in co-contaminated soils. In a field study, we assessed the effect of mushroom compost, leaf compost, noncomposted biosolids, and composted biosolids amendments on As speciation in a co-contaminated (As and Pb) soil at 7, 349, and 642 days after amending soils and the change of As speciation during an in vitro bioaccessibility extraction (gastric solution, pH 2.5) using bulk X-ray absorption near-edge structure spectroscopy. Soil was contaminated by coal combustion and other diffuse sources and had low As bioaccessibility (7%-12%). Unamended soil had As(III) sorbed onto pyrite (As(III)-pyrite; ∼60%) and As(V) adsorbed onto Fe oxy(hydr)oxides (As(V)-Fh; ∼40%). In amended soils, except in composted biosolids-amended soils, at 7 days, As(V)-Fh decreased to 15%-26% and redistributed into As(III)-Fh and/or As(III)-pyrite. This transformation was most pronounced in mushroom compost amended soil resulting in a significant (46%) increase of As bioaccessibility compared to the unamended soil. Composted biosolids-amended soils had relatively stable As(V)-Fh. Lead arsenate formed during the in vitro extraction in amended soils, except in composted biosolids-amended soils. Arsenic speciation and bioaccessibility were similar in 349- and 642-day in all the amended and unamended soils. Reduction of As(V)-Fh to As(III) forms in the short term in three of the amended soils showed the potential to increase As bioaccessibility. The formation of stable lead arsenate during the in vitro extraction would counteract the short-term increase of As bioaccessibility in those amended soils.
Collapse
Affiliation(s)
- Chammi P Attanayake
- Department of Agronomy, Throckmorton Plant Sciences Center, Kansas State University, Manhattan, Kansas, USA
- Institute for Sustainability, Energy and Environment, University of Illinois Urbana-Champaign, Urbana, Illinois, USA
| | - Ganga M Hettiarachchi
- Department of Agronomy, Throckmorton Plant Sciences Center, Kansas State University, Manhattan, Kansas, USA
| | - Aishika I Dissanayake
- Department of Soil Science, Faculty of Agriculture, University of Peradeniya, Peradeniya, Sri Lanka
| | - Qing Ma
- DND-CAT, Northwestern Synchrotron Research Center at Advanced Photon Source, Argonne, Illinois, USA
| |
Collapse
|
5
|
Zeng W, Lu Y, Zhou J, Zhang J, Duan Y, Dong C, Wu W. Simultaneous removal of Cd(II) and As(V) by ferrihydrite-biochar composite: Enhanced effects of As(V) on Cd(II) adsorption. J Environ Sci (China) 2024; 139:267-280. [PMID: 38105054 DOI: 10.1016/j.jes.2023.04.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 04/18/2023] [Accepted: 04/19/2023] [Indexed: 12/19/2023]
Abstract
The coexistence of cadmium (Cd(II)) and arsenate (As(V)) pollution has long been an environmental problem. Biochar, a porous carbonaceous material with tunable functionality, has been used for the remediation of contaminated soils. However, it is still challenging for the dynamic quantification and mechanistic understanding of the simultaneous sequestration of multi-metals in biochar-engineered environment, especially in the presence of anions. In this study, ferrihydrite was coprecipitated with biochar to investigate how ferrihydrite-biochar composite affects the fate of heavy metals, especially in the coexistence of Cd(II) and As(V). In the solution system containing both Cd(II) and As(V), the maximum adsorption capacities of ferrihydrite-biochar composite for Cd(II) and As(V) reached 82.03 µmol/g and 531.53 µmol/g, respectively, much higher than those of the pure biochar (26.90 µmol/g for Cd(II), and 40.24 µmol/g for As(V)) and ferrihydrite (42.26 µmol/g for Cd(II), and 248.25 µmol/g for As(V)). Cd(II) adsorption increased in the presence of As(V), possibly due to the changes in composite surface charge in the presence of As(V), and the increased dispersion of ferrihydrite by biochar. Further microscopic and mechanistic results showed that Cd(II) complexed with both biochar and ferrihydrite, while As(V) was mainly complexed by ferrihydrite in the Cd(II) and As(V) coexistence system. Ferrihydrite posed vital importance for the co-adsorption of Cd(II) and As(V). The different distribution patterns revealed by this study help to a deeper understanding of the behaviors of cations and anions in the natural environment.
Collapse
Affiliation(s)
- Wenjun Zeng
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China; South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China; Guangdong Engineering & Technology Research Center for System Control of Livestock and Poultry breeding Pollution, Guangzhou 510655, China
| | - Yang Lu
- South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China; Guangdong Engineering & Technology Research Center for System Control of Livestock and Poultry breeding Pollution, Guangzhou 510655, China
| | - Jingyan Zhou
- South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China; Guangdong Engineering & Technology Research Center for System Control of Livestock and Poultry breeding Pollution, Guangzhou 510655, China
| | - Jie Zhang
- South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China; Guangdong Engineering & Technology Research Center for System Control of Livestock and Poultry breeding Pollution, Guangzhou 510655, China
| | - Yuanxiao Duan
- South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China; Guangdong Engineering & Technology Research Center for System Control of Livestock and Poultry breeding Pollution, Guangzhou 510655, China
| | - Changxun Dong
- College of Sciences, Nanjing Agricultural University, Nanjing 210095, China.
| | - Wencheng Wu
- South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China; Guangdong Engineering & Technology Research Center for System Control of Livestock and Poultry breeding Pollution, Guangzhou 510655, China.
| |
Collapse
|
6
|
Hei E, He M, Zhang E, Yu H, Chen K, Qin Y, Zeng X, Zhou Z, Fan H, Shangguan Y, Wang L. Risk assessment of antimony-arsenic contaminated soil remediated using zero-valent iron at different pH values combined with freeze-thaw cycles. ENVIRONMENTAL MONITORING AND ASSESSMENT 2024; 196:448. [PMID: 38607467 DOI: 10.1007/s10661-024-12601-6] [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: 10/24/2023] [Accepted: 04/04/2024] [Indexed: 04/13/2024]
Abstract
Soil in mining wastelands is seriously polluted with heavy metals. Zero-valent iron (ZVI) is widely used for remediation of heavy metal-polluted soil because of its excellent adsorption properties; however, the remediation process is affected by complex environmental conditions, such as acid rain and freeze-thaw cycles. In this study, the effects of different pH values and freeze-thaw cycles on remediation of antimony (Sb)- and arsenic (As)-contaminated soil by ZVI were investigated in laboratory simulation experiments. The stability and potential human health risks associated with the remediated soil were evaluated. The results showed that ZVI has a significant stabilizing effect on Sb and As in both acidic and alkaline soils contaminated with dual levels of Sb and As, and the freeze-thaw process in different pH value solution systems further enhances the ability of ZVI to stabilize Sb and As, especially in acidic soils. However, it should be noted that apart from the pH=1.0 solution environment, ZVI's ability to stabilize As is attenuated under other circumstances, potentially leading to leaching of its unstable form and thereby increasing contamination risks. This indicates that the F1 (2% ZVI+pH=1 solution+freeze-thaw cycle) processing exhibits superior effectiveness. After F1 treatment, the bioavailability of Sb and As in both soils also significantly decreased during the gastric and intestinal stages (about 60.00%), the non-carcinogenic and carcinogenic risks of Sb and As in alkaline soils are eliminated for children and adults, with a decrease ranging from 60.00% to 70.00%, while in acidic soil, the non-carcinogenic and carcinogenic risks of As to adults and children is acceptable, but Sb still poses non-carcinogenic risks to children, despite reductions of about 65.00%. These findings demonstrate that soil pH is a crucial factor influencing the efficacy of ZVI in stabilizing Sb and As contaminants during freeze-thaw cycles. This provides a solid theoretical foundation for utilizing ZVI in the remediation of Sb- and As-contaminated soils, emphasizing the significance of considering both pH levels and freeze-thaw conditions to ensure effective and safe treatment.
Collapse
Affiliation(s)
- Erping Hei
- Institute of Agricultural Resources and Environment, Sichuan Academy of Agricultural Sciences, Chengdu, 610066, Sichuan, China
- College of Agronomy, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Mingjiang He
- Institute of Agricultural Resources and Environment, Sichuan Academy of Agricultural Sciences, Chengdu, 610066, Sichuan, China
| | - Enze Zhang
- College of Environment, Nanjing University, Nanjing, 210008, Jiangsu, China
| | - Hua Yu
- Institute of Agricultural Resources and Environment, Sichuan Academy of Agricultural Sciences, Chengdu, 610066, Sichuan, China
| | - Kun Chen
- Institute of Agricultural Resources and Environment, Sichuan Academy of Agricultural Sciences, Chengdu, 610066, Sichuan, China
| | - Yusheng Qin
- Institute of Agricultural Resources and Environment, Sichuan Academy of Agricultural Sciences, Chengdu, 610066, Sichuan, China
| | - Xiangzhong Zeng
- Institute of Agricultural Resources and Environment, Sichuan Academy of Agricultural Sciences, Chengdu, 610066, Sichuan, China
| | - Zijun Zhou
- Institute of Agricultural Resources and Environment, Sichuan Academy of Agricultural Sciences, Chengdu, 610066, Sichuan, China
| | - Hongzhu Fan
- Institute of Agricultural Resources and Environment, Sichuan Academy of Agricultural Sciences, Chengdu, 610066, Sichuan, China
| | - Yuxian Shangguan
- Institute of Agricultural Resources and Environment, Sichuan Academy of Agricultural Sciences, Chengdu, 610066, Sichuan, China.
| | - Luying Wang
- Chengdu Jiaji Agricultural Technology Co., Ltd., Chengdu, 610095, Sichuan, China
| |
Collapse
|
7
|
Park J, Yoon SG, Lee H, An J, Nam K. Effects of in situ Fe oxide precipitation on As stabilization and soil ecological resilience under salt stress. JOURNAL OF HAZARDOUS MATERIALS 2024; 462:132629. [PMID: 37832440 DOI: 10.1016/j.jhazmat.2023.132629] [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: 06/08/2023] [Revised: 09/04/2023] [Accepted: 09/23/2023] [Indexed: 10/15/2023]
Abstract
Iron (Fe) oxide precipitation is a promising method for stabilizing arsenic (As) in contaminated soils; however, the addition of salts during the process can negatively affect soil functions. This study investigated the effects of in situ Fe oxide precipitation on As stabilization and the impact of salt stress on soil functions and microbial communities. Fe oxide precipitation reduced the concentration of bioaccessible As by 84% in the stabilized soil, resulting in the formation of ferrihydrite and lepidocrocite, as confirmed by XANES. Nevertheless, an increase in salt stress reduced barley development, microbial enzyme activities, and microbial diversity compared to those in the original soil. Despite this, the stabilized soil exhibited natural resilience and potential for enhanced microbial adaptations, with increased retention of salt-tolerant bacteria. Washing the stabilized soil with water restored EC1:5 to the level of the original soil, resulting in increased barley growth rates and enzyme activities after 5-d and 20-week incubation periods, suggesting soil function recovery. 16 S rRNA sequencing revealed the retention of salt-tolerant bacteria in the stabilized soil, while salt-removed soil exhibited an increase in Proteobacteria, which could facilitate ecological functions. Overall, Fe oxide precipitation effectively stabilized soil As and exhibited potential for restoring the natural resilience and ecological functions of soils through microbial adaptations and salt removal.
Collapse
Affiliation(s)
- Jinhee Park
- Department of Civil & Environmental Engineering, Princeton University, Princeton, NJ 08544, USA
| | - Sang-Gyu Yoon
- Department of Smart City Engineering, Hanyang University, Ansan 15588, South Korea
| | - Hosub Lee
- Department of Civil & Environmental Engineering, Seoul National University, Seoul 08826, South Korea
| | - Jinsung An
- Department of Smart City Engineering, Hanyang University, Ansan 15588, South Korea; Department of Civil & Environmental Engineering, Hanyang University, Ansan 15588, South Korea.
| | - Kyoungphile Nam
- Department of Civil & Environmental Engineering, Seoul National University, Seoul 08826, South Korea
| |
Collapse
|
8
|
Shen T, Li Y, Hu H, Lu X, Wang L, Tang Y. P/Pb transport at the interface of water and Al-substituted ferrihydrite: Effect of P/Pb loading sequence. CHEMOSPHERE 2023; 325:138374. [PMID: 36906007 DOI: 10.1016/j.chemosphere.2023.138374] [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: 12/05/2022] [Revised: 03/06/2023] [Accepted: 03/08/2023] [Indexed: 06/18/2023]
Abstract
Sediment mineral such as Al-substituted ferrihydrite plays a critical role for contaminant transport in the river systems. Heavy metals and nutrient pollutants often coexisted in the natural aquatic environment, and they may enter the river at different time frames, altering the fate and transport of each other subsequently discharged into the river. However, most studies focused on the simultaneous adsorption of co-existing pollutants instead of their loading sequence. In this study, the transport of P and Pb at the interface of Al-substituted ferrihydrite and water was investigated under different P and Pb loading sequences. The results showed that preloaded P provided additional adsorption sites for the following adsorption of Pb, with enhanced Pb adsorption amount and accelerated adsorption process. Moreover, Pb preferred to be bounded with the preloaded P to form P-O-Pb ternary complexes rather than directly reacted with Fe-OH. The formation of the ternary complexes effectively prevented the release of Pb once adsorbed. However, the adsorption of P was slightly affected by the preloaded Pb, and most of the P were adsorbed onto Al-substituted ferrihydrite directly with the formation of Fe/Al-O-P. Moreover, the release process of the preloaded Pb was significantly inhibited by the following adsorbed P due to the formation of Pb-O-P. Meanwhile, the release of P was not detected from all P and Pb loaded samples of different adding sequence due to the high affinity between P and the mineral. Thus, the transport of Pb at the interface of Al-substituted ferrihydrite was seriously influenced by the adding sequence of Pb and P, while the transport of P was not sensitive to the adding sequence. The results provided important information for the transport of heavy metal and nutrients in river system with different discharging sequence, and offered new insights to further understand the secondary pollution in multi-contaminated river.
Collapse
Affiliation(s)
- Tingting Shen
- Department of Environmental Engineering, Taizhou University, Taizhou, Zhejiang, 318000, China; State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yongjie Li
- Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau SAR, China
| | - Hongwei Hu
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Xiao Lu
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Lijuan Wang
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yuanyuan Tang
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China.
| |
Collapse
|
9
|
Cui J, Niu X, Zhang D, Ma J, Zhu X, Zheng X, Lin Z, Fu M. The novel chitosan-amphoteric starch dual flocculants for enhanced removal of Microcystis aeruginosa and algal organic matter. Carbohydr Polym 2023; 304:120474. [PMID: 36641191 DOI: 10.1016/j.carbpol.2022.120474] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 11/29/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022]
Abstract
A novel flocculation strategy for simultaneously removing Microcystis aeruginosa and algal organic matter (AOM) was proposed using chitosan-amphoteric starch (C-A) dual flocculants in an efficient, cost-effective and ecologically friendly way, providing new insights for harmful algal blooms (HABs) control. A dual-functional starch-based flocculant, amphoteric starch (AS) with high anion degree of substitution (DSA) and cation degree of substitution (DSC), was prepared using a cationic moiety of 3-chloro-2-hydroxypropyltrimethylammonium chloride (CTA) coupled with an anion moiety of chloroacetic acid onto the backbone of starch simultaneously. In combination of the results of FTIR, XPS, 1H NMR, 13C NMR, GPC, EA, TGA and SEM, it was evidenced that the successfully synthesized AS with excellent structural characteristics contributed to the enhanced flocculation of M. aeruginosa. Furthermore, the novel C-A dual flocculants could achieve not only the removal of >99.3 % of M. aeruginosa, but also the efficacious flocculation of algal organic matter (AOM) at optimal concentration of (0.8:24) mg/L, within a wide pH range of 3-11. The analysis of zeta potential and cellular morphology revealed that the dual effects of both enhanced charge neutralization and notable netting-bridging played a vital role in efficient M. aeruginosa removal.
Collapse
Affiliation(s)
- Jingshu Cui
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China
| | - Xiaojun Niu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, College of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China.
| | - Dongqing Zhang
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, College of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, PR China.
| | - Jinling Ma
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China
| | - Xifen Zhu
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, College of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, PR China
| | - Xiaoxian Zheng
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China
| | - Zhang Lin
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China
| | - Mingli Fu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China
| |
Collapse
|
10
|
Jeong S, Kang J, Cho M, An J, Yoon HO. New insights into surface behavior of dimethylated arsenicals on montmorillonite using X-ray absorption spectroscopy. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 852:158531. [PMID: 36063923 DOI: 10.1016/j.scitotenv.2022.158531] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 08/21/2022] [Accepted: 08/31/2022] [Indexed: 06/15/2023]
Abstract
Although recent studies have revealed the occurrence of dimethylated arsenicals, little is known about their behavior in environment. This study investigates the adsorption behavior of dimethylarsinic acid (DMAV), dimethyldithioarsinic acid (DMDTAV), and dimethylmonothioarsinic acid (DMMTAV) on montmorillonite. Complicated transformations among arsenicals under normal environmental conditions were also considered. Our results clearly demonstrate that DMDTAV was oxidized to DMMTAV, which was relatively stable but partially transformed to DMAV when exposed to air during adsorption. The transformed DMAV exhibited high adsorption affinities for montmorillonite, while DMMTAV and DMDTAV were not appreciably retained by montmorillonite for 48 h. This is the first study to provide insights into DMDTAV oxidation under environmental conditions. X-ray absorption near edge structure and extended X-ray absorption fine structure studies confirmed that most of the adsorbed arsenicals on montmorillonite were DMAV. The significantly different bonding characteristics of each adsorbed DMAV provide direct evidence for the transformation of DMAV from DMDTAV and DMMTAV. Our study suggests the importance of incorporating the DMMTAV in the realistic risk management for soil environments because it is highly toxic, easily transformed from DMDTAV, and stable in the environment.
Collapse
Affiliation(s)
- Seulki Jeong
- Seoul Center, Korea Basic Science Institute, 6-7, Inchon-ro 22-gil, Seongbuk-gu, Seoul 02855, Republic of Korea
| | - Jinback Kang
- Seoul Center, Korea Basic Science Institute, 6-7, Inchon-ro 22-gil, Seongbuk-gu, Seoul 02855, Republic of Korea
| | - Minkyu Cho
- Seoul Center, Korea Basic Science Institute, 6-7, Inchon-ro 22-gil, Seongbuk-gu, Seoul 02855, Republic of Korea
| | - Jinsung An
- Department of Civil & Environmental Engineering, Hanyang University, Ansan 15588, Republic of Korea
| | - Hye-On Yoon
- Seoul Center, Korea Basic Science Institute, 6-7, Inchon-ro 22-gil, Seongbuk-gu, Seoul 02855, Republic of Korea.
| |
Collapse
|
11
|
Yoon SG, Kwak IS, Yoon HO, An J. Adsorption Characteristics of Dimethylated Arsenicals on Iron Oxide-Modified Rice Husk Biochar. TOXICS 2022; 10:703. [PMID: 36422911 PMCID: PMC9692524 DOI: 10.3390/toxics10110703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/11/2022] [Accepted: 11/12/2022] [Indexed: 06/16/2023]
Abstract
In this study, the adsorption characteristics of dimethylated arsenicals to rice husk biochar (BC) and Fe/biochar composite (FeBC) were assessed through isothermal adsorption experiments and X-ray absorption spectroscopy analysis. The maximal adsorption capacities (qm) of inorganic arsenate, calculated using the Langmuir isotherm equation, were 1.28 and 6.32 mg/g for BC and FeBC, respectively. Moreover, dimethylated arsenicals did not adsorb to BC at all, and in the case of FeBC, qm values of dimethylarsinic acid (DMA(V)), dimethylmonothioarsinic acid (DMMTA(V)), and dimethyldithioarsinic acid (DMDTA(V)) were calculated to be 7.08, 0.43, and 0.28 mg/g, respectively. This was due to the formation of iron oxide (i.e., two-line ferrihydrite) on the surface of BC. Linear combination fitting using As K-edge X-ray absorption near edge structure spectra confirmed that all chemical forms of dimethylated arsenicals adsorbed on the two-line ferrihydrite were DMA(V). Thus, FeBC could retain highly mobile and toxic arsenicals such as DMMTA(V) and DMDTA(V)) in the environment, and transform them into DMA(V) with relatively low toxicity.
Collapse
Affiliation(s)
- Sang-Gyu Yoon
- Department of Environment Safety System Engineering, Semyung University, Jecheon 27136, Republic of Korea
| | - Ihn-Sil Kwak
- Department of Ocean Integrated Science, Chonnam National University, Yeosu 59626, Republic of Korea
| | - Hye-On Yoon
- Korea Basic Science Institute, 145 Anam-ro, Seoul 02841, Republic of Korea
| | - Jinsung An
- Department of Civil & Environmental Engineering, Hanyang University, Ansan 15588, Republic of Korea
| |
Collapse
|
12
|
Liu Q, Luo J, Tang J, Chen Z, Chen Z, Lin Q. Remediation of cadmium and lead contaminated soils using Fe-OM based materials. CHEMOSPHERE 2022; 307:135853. [PMID: 35948099 DOI: 10.1016/j.chemosphere.2022.135853] [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: 05/15/2022] [Revised: 07/18/2022] [Accepted: 07/23/2022] [Indexed: 06/15/2023]
Abstract
Iron oxide-lignin composites (GLS) were prepared based on the significant role of Fe-OM in the environmental behaviour of heavy metals and lignin binding with iron oxide preferentially in soil. GLS was applied in Cd/Pb immobilization and the stability under acid rain was investigated. The results show that the iron oxide appeared weakly crystalline or amorphous similar to 2-line ferrihydrite after the addition of lignin. Agglomerates of nanoparticles with higher adsorption capacity were observed for GLS. The mobility factor (MF) of Cd/Pb in the soil decreased rapidly after adding GLS. At the 3% dosage, the MF of Cd and Pb in the soil was decreased by 58.94% and 78.15% respectively, which was approximately 5 times that of goethite (GE). The mobile and exchangeable Cd/Pb were converted to organic, amorphous Fe oxide-bound and residue fractions. Under acid rain conditions, MF continues to decline for the GLS group, increasing the organic and amorphous Fe oxide-bound fractions, while for control group (CK) and GE, the trend was the opposite. Lignin could inhibit iron oxide dissolution and stabilize the combination of Cd/Pb and iron oxides in soil. The better stability performance of GLS for Cd/Pb may be related to the higher adsorption capacity and microstructural difference after iron oxide combined with lignin.
Collapse
Affiliation(s)
- Qianjun Liu
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China.
| | - Jiayi Luo
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Jiepeng Tang
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Zhiliang Chen
- Guangdong Engineering Technology Research Center of Heavy Metal Pollution Control and Restoration in Farmland Soil, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510275, PR China.
| | - Zhaowei Chen
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Qintie Lin
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China
| |
Collapse
|
13
|
Odezulu NG, Lowney YW, Portier KM, Kozuch M, Bacon AR, Roberts SM, Stuchal LD. Effect of soil particle size and extraction method on the oral bioaccessibility of arsenic. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2022; 85:538-552. [PMID: 35272567 DOI: 10.1080/15287394.2022.2048935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Recent findings indicate that incidental ingestion of soil by humans primarily involves soil particles <150 µm, rather than <250 µm-sized fraction previously used for most oral bioaccessibility and bioavailability studies. It was postulated that a greater soil surface area in the finer fraction (<150 versus <250 µm) might increase oral bioaccessibility of arsenic (As) in soil. Bioaccessibility and concentrations of As were compared in <150 and <250 µm fractions of 18 soil samples from a variety of arsenic-contaminated sites. The two methods used to measure bioaccessibility were compared - EPA Method 1340 and the California Arsenic Bioaccessibility (CAB) method. Arsenic concentrations were nearly the same or higher in the <150 fraction compared with <250 µm. EPA Method 1340 and the CAB method presented significantly different bioaccessibility results, as well as estimated relative oral bioavailability (RBA) based upon algorithms specific to the methods, but there was no marked difference for <150 and <250 µm soil fractions within either method. When compared with RBA determined previously for these soil samples in vivo in non-human primates, EPA Method 1340 was generally more predictive than the CAB method. Data suggest that soil- or site-specific factors control bioaccessibility under either method and that the test method selected is more important than the particle size fraction (<150 or <250) in using these in vitro methods to predict As RBA for use in risk assessment.
Collapse
Affiliation(s)
- Nnanyelugo G Odezulu
- Center for Environmental and Human Toxicology, University of Florida, Gainesville, FL, USA
| | | | - Kenneth M Portier
- Center for Environmental and Human Toxicology, University of Florida, Gainesville, FL, USA
| | - Marianne Kozuch
- Center for Environmental and Human Toxicology, University of Florida, Gainesville, FL, USA
| | - Allan R Bacon
- Soil and Water Sciences Department, University of Florida, Gainesville, FL, USA
| | - Stephen M Roberts
- Center for Environmental and Human Toxicology, University of Florida, Gainesville, FL, USA
| | - Leah D Stuchal
- Center for Environmental and Human Toxicology, University of Florida, Gainesville, FL, USA
| |
Collapse
|
14
|
Simultaneous adsorption of As(III) and Cd(II) by ferrihydrite-modified biochar in aqueous solution and their mutual effects. Sci Rep 2022; 12:5918. [PMID: 35396518 PMCID: PMC8993855 DOI: 10.1038/s41598-022-09648-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 03/18/2022] [Indexed: 11/19/2022] Open
Abstract
A simply synthetic ferrihydrite-modified biochar (Fh@BC) was applied to simultaneously remove As(III) and Cd(II) from the aqueous solution, and then to explore the mutual effects between As(III) and Cd(II) and the corresponding mechanisms. The Langmuir maximum adsorption capacities of As(III) and Cd(II) in the single adsorbate solution were 18.38 and 18.18 mg g−1, respectively. It demonstrated that Fh@BC was a potential absorbent material for simultaneous removal of As(III) and Cd(II) in aqueous solution. According to the XRF, SEM–EDS, FTIR, XRD, and XPS analysis, the mechanisms of simultaneous removal of As(III) and Cd(II) by Fh@BC could be attributable to the cation exchange, complexation with R-OH and Fe-OH, and oxidation. Moreover, the mutual effect experiment indicated that Cd(II) and As(III) adsorption on Fh@BC in the binary solution exhibited competition, facilitation and synergy, depending on their ratios and added sequences. The mechanisms of facilitation and synergy between Cd(II) and As(III) might include the electrostatic interaction and the formation of both type A or type B ternary surface complexes on the Fh@BC.
Collapse
|
15
|
Fan C, Yin N, Cai X, Du X, Wang P, Liu X, Li Y, Chang X, Du H, Ma J, Cui Y. Stabilization of fluorine-contaminated soil in aluminum smelting site with biochar loaded iron-lanthanide and aluminum-lanthanide bimetallic materials. JOURNAL OF HAZARDOUS MATERIALS 2022; 426:128072. [PMID: 34954432 DOI: 10.1016/j.jhazmat.2021.128072] [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: 10/11/2021] [Revised: 12/08/2021] [Accepted: 12/09/2021] [Indexed: 06/14/2023]
Abstract
Trivalent metals-modified-biochar (BC) has been widely used for the removal of fluorine (F) in water, but little is known about its effects on the stability and mobility of F-contaminated soil. Two types of modified-BC materials (BC-loaded iron-lanthanide (BC/Fe-La) and BC-loaded aluminum-lanthanide (BC/Al-La)) were synthesized and used for the remediation of F-contaminated soil. The forms of BC/LaxFe3x(OH)y in BC/Fe-La and BC/LaxAl3x(OH)y in BC/Al-La were identified by spectroscopy, X-ray dispersion, thermogravimetric, and pore diameter/volume analyses. Following application (4-12%, w/w) to F-contaminated soil for 30 d, water soluble fluoride (WSF) decreased significantly. The modified-BC with a 1:1:1 molar ratio (BC: Al3+ or Fe3+: La3+) were more effective than those at 1:0.5:0.5. The BC/Al-La were the most effective to stabilize F. In particular, the highest decrease in WSF (by 91.75%) was obtained with the application of 12% BC/Al-La-2, while 8% BC/Al-La-2% and 12% BC/Al-La-1 reduced the WSF by 87.58% and 90.17%, respectively; all values obtained were lower than the national standard of China (< 1.5 mg/L). In addition, the sequential extraction results showed that modified-BC promoted the transformation of the other chemical speciation to the Fe/Mn-F.
Collapse
Affiliation(s)
- Chuanfang Fan
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China; Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Naiyi Yin
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China; Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Xiaolin Cai
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China; Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Xin Du
- CHINALCO Environmental protection and Energy Conservation Group Co. Ltd., Beijing 102209, PR China
| | - Pengfei Wang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China; Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Xiaotong Liu
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China; Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Yunpeng Li
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China; Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Xuhui Chang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China; Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Huili Du
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China; Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Jingnan Ma
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China; Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Yanshan Cui
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China; Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, PR China.
| |
Collapse
|
16
|
Yin N, Li Y, Cai X, Du H, Wang P, Han Z, Sun G, Cui Y. The role of soil arsenic fractionation in the bioaccessibility, transformation, and fate of arsenic in the presence of human gut microbiota. JOURNAL OF HAZARDOUS MATERIALS 2021; 401:123366. [PMID: 32659581 DOI: 10.1016/j.jhazmat.2020.123366] [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: 05/11/2020] [Revised: 06/22/2020] [Accepted: 06/30/2020] [Indexed: 06/11/2023]
Abstract
Soil arsenic (As) fractionation and its bioaccessibility are two important factors in human health risk assessment. However, data related to the impact of As minerals on the bioaccessibility with human gut microbiota involvement are scarce. In this study, speciation analysis was determined using HPLC-ICP-MS and XANES after incubation with colon microbiota from human origin, in combination with sequential extraction. Significant increase of colon As bioaccessibility was contributed primarily from As associated with amorphous and crystalline Fe/Al (hydr)oxides. We found a high degree of transformation at higher bioaccessibility (ave. 40 % of total As), which was predominantly present as liquid-phase As. In contrast, As transformation occurred mainly in the solid phase at lower bioaccessibility (< 5%), especially for soils containing As-S species. XANES spectroscopy revealed that As(III) increased by about 20 % in soil residues. Finally, the excreted As may be predominantly in association with (alumino)silicate minerals by SEM-EDX. It inferred that the priority sequence in As transformation by human gut microbiota was dissolved As(V), As(V) sorbed to mineral surfaces, crystalline As(V)-bearing minerals and As sulfides. This study will shed new light on the role of As-bearing minerals in evaluating health risks from soil As exposure.
Collapse
Affiliation(s)
- Naiyi Yin
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China; Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
| | - Yunpeng Li
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China; Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
| | - Xiaolin Cai
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China; Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
| | - Huili Du
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China; Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
| | - Pengfei Wang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China; Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
| | - Zeliang Han
- College of Environment and Resources, Fuzhou University, Fujian, Fuzhou 350116, People's Republic of China
| | - Guoxin Sun
- Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
| | - Yanshan Cui
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China; Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China.
| |
Collapse
|
17
|
Park J, An J, Chung H, Kim SH, Nam K. Reduction of bioaccessibility of As in soil through in situ formation of amorphous Fe oxides and its long-term stability. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 745:140989. [PMID: 32738685 DOI: 10.1016/j.scitotenv.2020.140989] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 06/05/2020] [Accepted: 07/13/2020] [Indexed: 06/11/2023]
Abstract
The bioaccessibility of As in soil, rather than its total concentration, is closely related to its potential risk. In this study, the in situ formation of amorphous Fe oxides was applied to As-contaminated soil to induce As-Fe coprecipitates that can withstand the gastric digestion condition of human beings. To promote the formation of Fe oxides, 2% ferric nitrate (w/w) and 30% water (v/w) were introduced, and the pH was adjusted to ~7. The chemical extractability of As in soil was determined using the solubility/bioavailability research consortium method and five-step sequential extraction. In situ formation of Fe oxides resulted in a remarkable increase in the As associated with amorphous Fe oxides, decreasing most of the exchangeable As (i.e., the sum of SO42- and PO43- extractable As), and thereby reducing the bioaccessibility of As. The types of association between As and Fe oxides were investigated using X-ray absorption spectroscopy analysis. Linear combination fit (LCF) analysis demonstrated that As bound to amorphous Fe oxides could exist as coprecipitates with ferrihydrite and schwertmannite after stabilization. The bioaccessibility of the coprecipitated As in soil further decreased as amorphous Fe oxides transformed to crystalline form with time, which was supported by the LCF results showing an increase of goethite in aged soil.
Collapse
Affiliation(s)
- Jinhee Park
- Department of Civil & Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Jinsung An
- Department of Biological & Environmental Engineering, Semyung University, 65 Semyung-ro, Jecheon-si, Chungcheongbuk-do 27136, Republic of Korea
| | - Hyeonyong Chung
- Department of Civil & Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Sang Hyun Kim
- Department of Civil & Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Kyoungphile Nam
- Department of Civil & Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.
| |
Collapse
|
18
|
Park J, Chung H, Kim SH, An J, Nam K. Effect of neutralizing agents on the type of As co-precipitates formed by in situ Fe oxides synthesis and its impact on the bioaccessibility of As in soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 743:140686. [PMID: 32673914 DOI: 10.1016/j.scitotenv.2020.140686] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 06/30/2020] [Accepted: 06/30/2020] [Indexed: 06/11/2023]
Abstract
The bioaccessibility of heavy metals in soil is closely related to their potential risk. Therefore, developing techniques for reducing it needs considerable attention. In this study, we aimed to co-precipitate soil As(V) through an in situ formation of Fe oxides, thereby reducing its bioaccessibility. Soil As(V) was co-precipitated by introducing 2% Fe-nitrate (w/w) and 30% water (v/w) into soil at pH ~7. Two different neutralizing agents (NaOH and CaO) were used to induce the precipitation of Fe oxides, and their effects on the speciation of As were investigated. In all the stabilized soils, the exchangeable As fraction decreased, and the fraction of As bound to amorphous Fe oxides increased by a factor of more than 1.4. In contrast, a marked decrease in bioaccessibility of As was achieved using NaOH (40% to 7%). X-ray absorption spectroscopy analysis demonstrated that highly bioaccessible forms of calcium iron arsenate (yukonite and arseniosiderite) could be generated in CaO-stabilized soil. Our study found that neutralizing agents may play an important role in stabilizing As(V) and lowering its bioaccessibility through determining the type of formed Fe oxides in soil.
Collapse
Affiliation(s)
- Jinhee Park
- Department of Civil & Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Hyeonyong Chung
- Department of Civil & Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Sang Hyun Kim
- Department of Civil & Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Jinsung An
- Department of Biological & Environmental Engineering, Semyung University, 65 Semyung-ro, Jecheon-si, Chungcheongbuk-do 27136, Republic of Korea.
| | - Kyoungphile Nam
- Department of Civil & Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| |
Collapse
|
19
|
Liu Q, Tang J, Li X, Lin Q, Xiao R, Zhang M, Yin G, Zhou Y. Effect of lignosulfonate on the adsorption performance of hematite for Cd(II). THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 738:139952. [PMID: 32534277 DOI: 10.1016/j.scitotenv.2020.139952] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 05/25/2020] [Accepted: 06/02/2020] [Indexed: 06/11/2023]
Abstract
Lignin is a precursor of humus in soil and sediment. Lignin can be separated from vascular plants in the form of lignosulfonate via pulping processes. On the other hand, composites of iron oxide and organic matter can adsorb heavy metals, and thus influence the migration of these heavy metals in the environment. In this paper, a hematite/lignosulfonate composite (HLS) was prepared via coprecipitation to compare the adsorption performance of hematite (α-Fe2O3) toward Cd(II) before and after the incorporation of lignosulfonate (LS). The HLS is found to exhibit a weakly crystalline structure and possess a large number of nanoscale particles. Specific surface area of HLS (291.97 m2/g) is about 11 times that of α-Fe2O3, and the pore volume of HLS (0.22 cm3/g) is twice that of α-Fe2O3. The adsorption of Cd(II) is well illustrated by the pseudo-second-order adsorption kinetics and the initial adsorption rate (h) of HLS is 13.83 times that of α-Fe2O3. The maximum adsorption capacities are significantly improved from 4.89-6.35 mg/g (α-Fe2O3) to 39.03-53.65 mg/g (HLS). A greater affinity and more favorable association between Cd(II) and HLS is observed via fitting models. The incorporation of LS provides HLS with significantly better adsorption properties toward Cd(II) than α-Fe2O3, as is further confirmed by FT-IR and XPS characterization. Fe-O-O-H and Fe-O-H structures as well as more hydroxyl groups are observed, which promote the adsorption performance since the process are mainly influenced by complexation via coordination bonds.
Collapse
Affiliation(s)
- Qianjun Liu
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China.
| | - Jiepeng Tang
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Xiang Li
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Qintie Lin
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Rongbo Xiao
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Min Zhang
- School of Materials Science and Energy Engineering, Foshan University, Foshan 528000, China.
| | - Guangcai Yin
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Yangmei Zhou
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| |
Collapse
|
20
|
Yin N, Cai X, Zheng L, Du H, Wang P, Sun G, Cui Y. In Vitro Assessment of Arsenic Release and Transformation from As(V)-Sorbed Goethite and Jarosite: The Influence of Human Gut Microbiota. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:4432-4442. [PMID: 32176848 DOI: 10.1021/acs.est.9b07235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The importance of arsenic metabolism by gut microbiota has been evidenced in risk characterization from As exposures. In this study, we evaluated the metabolic potency of human gut microbiota toward As(V)-sorbed goethite and jarosite, presenting different behaviors of As release, and the solid-liquid transformation and partitioning. The release of As occurred mainly in the small intestinal phase for jarosite and in the colon phase for goethite, respectively. We found higher degree of As(V) and Fe(III) reduction by human gut microbiota in the colon digests of goethite than jarosite. Speciation analysis using high-performance liquid chromatography coupled with inductively coupled plasma mass spectrometry and X-ray absorption near-edge spectroscopy, revealed that 43.2% and 8.5% of total As was present as As(III) in the liquid and solid phase, respectively, after goethite incubation, whereas almost all generated As(III) was in the colon digests of jarosite. Therefore, As bioaccessibility in human gastrointestinal tract was predominantly contributed to Fe(III) dissolution in jarosite, and to microbial reduction of Fe(III) and As(V) in goethite. It expanded our knowledge on the role of Fe minerals in human health risk assessment associated with soil As exposures.
Collapse
Affiliation(s)
- Naiyi Yin
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China
- Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
| | - Xiaolin Cai
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China
- Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
| | - Lirong Zheng
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Huili Du
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China
- Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
| | - Pengfei Wang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China
- Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
| | - Guoxin Sun
- Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
| | - Yanshan Cui
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China
- Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
| |
Collapse
|
21
|
Jeong S, Hong JK, Jho EH, Nam K. Interaction among soil physicochemical properties, bacterial community structure, and arsenic contamination: Clay-induced change in long-term arsenic contaminated soils. JOURNAL OF HAZARDOUS MATERIALS 2019; 378:120729. [PMID: 31202066 DOI: 10.1016/j.jhazmat.2019.06.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 05/23/2019] [Accepted: 06/03/2019] [Indexed: 06/09/2023]
Abstract
Pyrosequencing analyses to determine soil bacterial communities were conducted with forty-two soil samples collected from rice paddy and forest/farmland soils (Group A and B, respectively) at a long-term As-contaminated site. Soil physicochemical properties, such as the concentrations of As, Fe, Al, and Mn, pH, organic matter content, and clay content, were found to be significantly different with land use, and more importantly, strongly affected the bacterial community structure of the soil samples. When fitting the soil properties onto a nonmetric multidimensional scale plot of soil bacterial communities, clay content was found to be the most important factor in clustering the bacterial communities (R2 = 0.4831, p-value = 0.001). Phylum Chloroflexi (-1.03 of bioplot score) and Planctomycetes (1.31 of bioplot score) showed a significant relationship with clay content in soil samples. Interestingly, thebacterial phylotypes linked to clay content were only found in the soil samples of group B with low clay content, and had a strong relationship to As contamination in the redundancy analysis and the correlation analysis.Our results suggest that clay content seems to be negatively related to As contamination in soils, which, in turn, strongly influences the structure of bacterial communities in As-contaminated soil.
Collapse
Affiliation(s)
- Seulki Jeong
- Seoul Center, Korea Basic Science Institute, 6-7, Inchon-ro 22-gil, Seongbuk-gu, Seoul 02855, Republic of Korea
| | - Jin Kyung Hong
- Department of Environmental Science, Hankuk University of Foreign Studies, 81 Oedae-ro, Mohyeonmyeon, Cheoin-gu, Yongin-si, Gyeonggi-do 17035, Republic of Korea
| | - Eun Hea Jho
- Department of Environmental Science, Hankuk University of Foreign Studies, 81 Oedae-ro, Mohyeonmyeon, Cheoin-gu, Yongin-si, Gyeonggi-do 17035, Republic of Korea
| | - Kyoungphile Nam
- Department of Civil and Environmental Engineering, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea; Institute of Engineering Research, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea.
| |
Collapse
|
22
|
Ciminelli VST, Antônio DC, Caldeira CL, Freitas ETF, Delbem ID, Fernandes MM, Gasparon M, Ng JC. Low arsenic bioaccessibility by fixation in nanostructured iron (Hydr)oxides: Quantitative identification of As-bearing phases. JOURNAL OF HAZARDOUS MATERIALS 2018; 353:261-270. [PMID: 29677528 DOI: 10.1016/j.jhazmat.2018.03.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 02/28/2018] [Accepted: 03/20/2018] [Indexed: 06/08/2023]
Abstract
A new analytical protocol was developed to provide quantitative, single-particle identification of arsenic in heterogeneous nanoscale mineral phases in soil samples, with a view to establishing its potential risk to human health. Microscopic techniques enabled quantitative, single-particle identification of As-bearing phases in twenty soil samples collected in a gold mining district with arsenic concentrations in range of 8 to 6354 mg kg-1. Arsenic is primarily observed in association with iron (hydr) oxides in fine intergrowth with phyllosilicates. Only small quantities of arsenopyrite and ferric arsenate (likely scorodite) particles, common in the local gold mineralization, were identified (e.g., 7 and 9 out, respectively, of app. 74,000 particles analyzed). Within the high-arsenic subgroup, the arsenic concentrations in the particle size fraction below 250μm ranges from 211 to 4304 mg kg-1. The bioaccessible arsenic in the same size fraction is within 0.86-22 mg kg-1 (0.3-5.0%). Arsenic is trapped in oriented aggregates of crystalline iron (hydr)oxides nanoparticles, and this mechanism accounts for the low As bioaccessibility. The calculated As exposure from soil ingestion is less than 10% of the arsenic Benchmark Dose Lower Limit - BMDL0.5. Therefore, the health risk associated with the ingestion of this geogenic material is considered to be low.
Collapse
Affiliation(s)
- Virginia S T Ciminelli
- Universidade Federal de Minas Gerais, Belo Horizonte, 31270901, MG, Brazil; National Institute of Science and Technology on Minerals Resources, Water and Biodiversity, INCT-Acqua, Brazil.
| | - Daphne C Antônio
- Universidade Federal de Minas Gerais, Belo Horizonte, 31270901, MG, Brazil
| | - Claudia L Caldeira
- Universidade Federal de Minas Gerais, Belo Horizonte, 31270901, MG, Brazil; National Institute of Science and Technology on Minerals Resources, Water and Biodiversity, INCT-Acqua, Brazil
| | - Erico T F Freitas
- Universidade Federal de Minas Gerais, Belo Horizonte, 31270901, MG, Brazil; National Institute of Science and Technology on Minerals Resources, Water and Biodiversity, INCT-Acqua, Brazil
| | - Itamar Daniel Delbem
- Universidade Federal de Minas Gerais, Belo Horizonte, 31270901, MG, Brazil; National Institute of Science and Technology on Minerals Resources, Water and Biodiversity, INCT-Acqua, Brazil
| | - Marcus M Fernandes
- Centro de Inovação e Tecnologia SENAI FIEMG - CITSF / Campus CETEC, Belo Horizonte, 31035536, MG, Brazil
| | - Massimo Gasparon
- National Institute of Science and Technology on Minerals Resources, Water and Biodiversity, INCT-Acqua, Brazil; The University of Queensland, School of Earth and Environmental Sciences, St Lucia, 4072, Australia
| | - Jack C Ng
- National Institute of Science and Technology on Minerals Resources, Water and Biodiversity, INCT-Acqua, Brazil; The University of Queensland, Queensland Alliance for Environmental Health Sciences (QAEHS), Brisbane, 4108, Australia
| |
Collapse
|