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Yue J, Yang H, Liu C, Wang S, Wang L. Unraveling the pyridinic nitrogen vacancy in carbon nitride for photo-self Fenton-like purification of organic contaminants. J Colloid Interface Sci 2024; 673:475-485. [PMID: 38879989 DOI: 10.1016/j.jcis.2024.06.104] [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: 04/06/2024] [Revised: 06/07/2024] [Accepted: 06/12/2024] [Indexed: 06/18/2024]
Abstract
This work reports a carbon nitride with pyridinic nitrogen-vacancy (N2CV-CN), which purifies organic contaminants via an in-situ photo-self Fenton-like reaction. Experiments and calculations demonstrated that the nitrogen-vacancy induces lone-paired (LP) and symmetry-unpaired electrons, promoting the formation of low-energy LP-π hybridized orbitals and helping to overcome the pairing energy required for oxygen to accept electrons. Furthermore, the nitrogen-vacancy accelerates film and intra-particle diffusion rates of organic contaminants on N2CV-CN, creating beneficial conditions for reactive oxide species to mineralize organic contaminants. Under sunlight and atmospheric oxygen, a photo-self Fenton-like reaction involving proton-coupled electron transfer occurred on the surface of N2CV-CN. Furthermore, by integrating photocatalysis with flocculation, about 99.1 % suspended substance, 45.5 % chemical oxygen demand, and 38.4 % biological oxygen demand were reduced from polluted river-water. Constructing N2CV-CN and understanding its crucial role offer theoretical and methodological insights into the in-situ purification of contaminated water bodies.
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Affiliation(s)
- Junpeng Yue
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Hanpei Yang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.
| | - Chen Liu
- Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
| | - Shi Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Lina Wang
- College of Civil Engineering and Architecture, Quzhou University, Quzhou 324000, China
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2
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Sun J, Shi S, Zheng J, Zheng X, Xu X, Liu K, Wei P, Chen Q, Liu F, Zhao C, Zhang X. An immobilized composite microbial material combined with slow release agents enhances oil-contaminated groundwater remediation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 919:170762. [PMID: 38340862 DOI: 10.1016/j.scitotenv.2024.170762] [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: 09/13/2023] [Revised: 12/05/2023] [Accepted: 02/04/2024] [Indexed: 02/12/2024]
Abstract
Microbial remediation of oil-contaminated groundwater is often limited by the low temperature and lack of nutrients in the groundwater environment, resulting in low degradation efficiency and a short duration of effectiveness. In order to overcome this problem, an immobilized composite microbial material and two types of slow release agents (SRA) were creatively prepared. Three oil-degrading bacteria, Serratia marcescens X, Serratia sp. BZ-L I1 and Klebsiella pneumoniae M3, were isolated from oil-contaminated groundwater, enriched and compounded, after which the biodegradation rate of the Venezuelan crude oil and diesel in groundwater at 15 °C reached 63 % and 79 %, respectively. The composite microbial agent was immobilized on a mixed material of silver nitrate-modified zeolite and activated carbon with a mass ratio of 1:5, which achieved excellent oil adsorption and water permeability performance. The slow release processes of spherical and tablet SRAs (SSRA, TSRA) all fit well with the Korsmeyer-Peppas kinetic model, and the nitrogen release mechanism of SSRA N2 followed Fick's law of diffusion. The highest oil removal rates by the immobilized microbial material combined with SSRA N2 and oxygen SRA reached 94.9 % (sand column experiment) and 75.1 % (sand tank experiment) during the 45 days of remediation. Moreover, the addition of SRAs promoted the growth of oil-degrading bacteria based on microbial community analysis. This study demonstrates the effectiveness of using immobilized microbial material combined with SRAs to achieve a high efficiency and long-term microbial remediation of oil contaminated shallow groundwater.
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Affiliation(s)
- Juan Sun
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China; State Key Laboratory of Petroleum Pollution Control, Beijing 102206, China.
| | - Shuangxin Shi
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Jin Zheng
- State Key Laboratory of Petroleum Pollution Control, Beijing 102206, China
| | - Xiuzhi Zheng
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Xinyu Xu
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Kaiwen Liu
- Jianghan Machinery Research Institute Limited Co. of CNPC, Wuhan 430074, China
| | - Pengshuo Wei
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Qiuying Chen
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Fang Liu
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Chaocheng Zhao
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Xiuxia Zhang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
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Cruz-Barrera M, Izquierdo-García LF, Gómez-Marroquín M, Santos-Díaz A, Uribe-Gutiérrez L, Moreno-Velandia CA. Hydrogel capsules as new delivery system for Trichoderma koningiopsis Th003 to control Rhizoctonia solani in rice (Oryza sativa). World J Microbiol Biotechnol 2024; 40:108. [PMID: 38403797 PMCID: PMC10894772 DOI: 10.1007/s11274-024-03897-0] [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: 11/11/2022] [Accepted: 01/12/2024] [Indexed: 02/27/2024]
Abstract
The incorporation of biological control agents (BCAs) such as Trichoderma spp. in agricultural systems favors the transition towards sustainable practices of plant nutrition and diseases control. Novel bioproducts for crop management are called to guarantee sustainable antagonism activity of BCAs and increase the acceptance of the farmers. The encapsulation in polymeric matrices play a prominent role for providing an effective carrier/protector and long-lasting bioproduct. This research aimed to study the influence of biopolymer in hydrogel capsules on survival and shelf-life of T. koningiopsis. Thus, two hydrogel capsules prototypes based on alginate (P1) and amidated pectin (P2), containing conidia of T. koningiopsis Th003 were formulated. Capsules were prepared by the ionic gelation method and calcium gluconate as crosslinker. Conidia releasing under different pH values of the medium, survival of conidia in drying capsules, storage stability, and biocontrol activity against rice sheath blight (Rhizoctonia solani) were studied. P2 prototype provided up to 98% survival to Th003 in fluid bed drying, faster conidia releasing at pH 5.8, storage stability greater than 6 months at 18 °C, and up to 67% of disease reduction. However, both biopolymers facilitate the antagonistic activity against R. solani, and therefore can be incorporated in novel hydrogel capsules-based biopreparations. This work incites to develop novel biopesticides-based formulations with potential to improve the delivery process in the target site and the protection of the active ingredient from the environmental factors.
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Affiliation(s)
- Mauricio Cruz-Barrera
- Bioproducts Department, Corporación Colombiana de Investigación Agropecuaria (AGROSAVIA), Km 14 vía Bogotá a Mosquera, Mosquera, Colombia.
| | - Luisa Fernanda Izquierdo-García
- Agricultural Microbiology Laboratory, Tibaitatá Research Center, Corporación Colombiana de Investigación Agropecuaria (AGROSAVIA), Km 14 vía Bogotá a Mosquera, Mosquera, Colombia
| | - Magda Gómez-Marroquín
- Agricultural Microbiology Laboratory, Tibaitatá Research Center, Corporación Colombiana de Investigación Agropecuaria (AGROSAVIA), Km 14 vía Bogotá a Mosquera, Mosquera, Colombia
| | - Adriana Santos-Díaz
- Agricultural Microbiology Laboratory, Tibaitatá Research Center, Corporación Colombiana de Investigación Agropecuaria (AGROSAVIA), Km 14 vía Bogotá a Mosquera, Mosquera, Colombia
| | - Liz Uribe-Gutiérrez
- Agricultural Microbiology Laboratory, Tibaitatá Research Center, Corporación Colombiana de Investigación Agropecuaria (AGROSAVIA), Km 14 vía Bogotá a Mosquera, Mosquera, Colombia
| | - Carlos Andrés Moreno-Velandia
- Agricultural Microbiology Laboratory, Tibaitatá Research Center, Corporación Colombiana de Investigación Agropecuaria (AGROSAVIA), Km 14 vía Bogotá a Mosquera, Mosquera, Colombia
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Wang J, Zhang Y, Liu T, Shi Y, Ding Y, Zhang Y, Xu W, Zhang X, Wang Y, Li D. A biodegradable chitosan-based polymer for sustained nutrient release to stimulate groundwater hydrocarbon-degrading microflora. CHEMOSPHERE 2023; 344:140346. [PMID: 37832890 DOI: 10.1016/j.chemosphere.2023.140346] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 09/21/2023] [Accepted: 09/30/2023] [Indexed: 10/15/2023]
Abstract
Petroleum hydrocarbon-contaminated groundwater often has a low indigenous microorganism population and lacks the necessary nutrient substrates for biodegradation reaction, resulting in a weak natural remediation ability within the groundwater ecosystem. In this paper, we utilized the principle of petroleum hydrocarbon degradation by microorganisms to identify effective nutrients (NaH2PO4, K2HPO4, NH4NO3, CaCl2, MgSO4·7H2O, FeSO4·7H2O, and VB12) and optimize nutrient substrate allocation through a combination of actual surveys of petroleum hydrocarbon-contaminated sites and microcosm experiments. Building on this, combining biostimulation and controlled-release technology, we developed a biodegradable chitosan-based encapsulated targeted biostimulant (i.e., YZ-1) characterized by easy uptake, good stability, controllable slow-release migration, and longevity to stimulate indigenous microflora in groundwater to efficiently degrade petroleum hydrocarbon. Results showed that YZ-1 extended the active duration of nutrient components by 5-6 times, with a sustainable release time exceeding 2 months. Under YZ-1 stimulation, microorganisms grew rapidly, increasing the degradation rate of petroleum hydrocarbon (10 mg L-1) by indigenous microorganisms from 43.03% to 79.80% within 7 d. YZ-1 can easily adapt to varying concentrations of petroleum hydrocarbon-contaminated groundwater. Specifically, in the range of 2-20 mg L-1 of petroleum hydrocarbon, the indigenous microflora was able to degrade 71.73-80.54% of the petroleum hydrocarbon within a mere 7 d. YZ-1 injection facilitated the delivery of nutrient components into the underground environment, improved the conversion ability of inorganic electron donors/receptors in the indigenous microbial community system, and strengthened the co-metabolism mechanism among microorganisms, achieving the goal of efficient petroleum hydrocarbon degradation.
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Affiliation(s)
- Jili Wang
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; College of New Energy and Environment, Jilin University, Changchun 130021, China; Institute of Water Resources and Environment, Jilin University, Changchun 130021,China
| | - Yuling Zhang
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; College of New Energy and Environment, Jilin University, Changchun 130021, China; Institute of Water Resources and Environment, Jilin University, Changchun 130021,China.
| | - Ting Liu
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; College of New Energy and Environment, Jilin University, Changchun 130021, China; Institute of Water Resources and Environment, Jilin University, Changchun 130021,China
| | - Yujia Shi
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; College of New Energy and Environment, Jilin University, Changchun 130021, China; Institute of Water Resources and Environment, Jilin University, Changchun 130021,China; Changchun Gold Research Institute Co., Ltd, Changchun 130021, China
| | - Yang Ding
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; College of New Energy and Environment, Jilin University, Changchun 130021, China; Institute of Water Resources and Environment, Jilin University, Changchun 130021,China
| | - Yi Zhang
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; College of New Energy and Environment, Jilin University, Changchun 130021, China; Institute of Water Resources and Environment, Jilin University, Changchun 130021,China
| | - Weiqing Xu
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; College of New Energy and Environment, Jilin University, Changchun 130021, China; Institute of Water Resources and Environment, Jilin University, Changchun 130021,China
| | - Xinying Zhang
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; College of New Energy and Environment, Jilin University, Changchun 130021, China; Institute of Water Resources and Environment, Jilin University, Changchun 130021,China
| | - Yiliang Wang
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; College of New Energy and Environment, Jilin University, Changchun 130021, China; Institute of Water Resources and Environment, Jilin University, Changchun 130021,China
| | - Dong Li
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; College of New Energy and Environment, Jilin University, Changchun 130021, China; Institute of Water Resources and Environment, Jilin University, Changchun 130021,China
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Chiaregato CG, Bernardinelli OD, Shavandi A, Sabadini E, Petri DFS. The effect of the molecular structure of hydroxypropyl methylcellulose on the states of water, wettability, and swelling properties of cryogels prepared with and without CaO 2. Carbohydr Polym 2023; 316:121029. [PMID: 37321726 DOI: 10.1016/j.carbpol.2023.121029] [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: 01/27/2023] [Revised: 05/08/2023] [Accepted: 05/13/2023] [Indexed: 06/17/2023]
Abstract
Hydroxypropyl methylcellulose (HPMC) belongs to the cellulose ether family that has hydroxyl groups substituted by hydrophobic methyl groups (DS) and hydrophilic hydroxypropyl groups (MS). Herein, the interactions between water molecules and cryogels prepared with HPMC in the presence and absence of a linear nonionic surfactant, as well as CaO2 microparticles, which react with water producing O2, were systematically investigated by sorption experiments and Time-Domain Nuclear Magnetic Resonance. Regardless of the DS and MS, most water molecules presented transverse relaxation time t2 typical of intermediate water and a small population of more tightly bound water. HPMC cryogels with the highest DS of 1.9 presented the slowest swelling rate of 0.519 ± 0.053 gwater/(g.s) and the highest contact angle values 85.250o ± 0.004o, providing the best conditions for a slow reaction between CaO2 and water. The presence of surfactant favored hydrophobic interactions that allowed the polar head of the surfactant to be exposed to the medium, resulting in a higher swelling rate and lower contact angle values. The HPMC with the highest MS presented the fastest swelling rate and the lowest contact angle. These findings are relevant for the formulations and reactions, where tuning the swelling kinetics is crucial for the final application.
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Affiliation(s)
- Camila Gruber Chiaregato
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, 05508-000 São Paulo, Brazil
| | | | - Amin Shavandi
- BioMatter Unit, École Polytechnique de Bruxelles, Université Libre de Bruxelles (ULB), 1050 Brussels, Belgium
| | - Edvaldo Sabadini
- Department of Physical Chemistry, Institute of Chemistry, State University of Campinas, 6154, 13083-970 Campinas, Brazil
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Wang J, Zhang Y, Yang Q, Yin S, Wang X, Liu T, Shi Y. A starch-based controlled-release targeted nutrient agent to stimulate the activity of volatile chlorinated hydrocarbon-degrading indigenous microflora present in groundwater. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 247:114262. [PMID: 36327786 DOI: 10.1016/j.ecoenv.2022.114262] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 10/20/2022] [Accepted: 10/30/2022] [Indexed: 06/16/2023]
Abstract
Volatile chlorinated hydrocarbons (VCHs) contaminated groundwater has a low indigenous microorganism population, and lack of nutrient substrates involved in degradation reactions, resulting in a weak natural remediation ability of groundwater ecosystems. In this study, based on the principle of degradation of VCHs by indigenous microorganisms in groundwater, and combined with biostimulation and controlled-release technology, we developed a starch-based encapsulated targeted bionutrient (YH-1) with easy uptake, good stability, controllable slow-release migration, and long timeliness for the remediation of groundwater contaminated by VCHs by indigenous microorganisms. The results showed that YH-1 is easily absorbed by microorganisms and can rapidly initiate itself to stimulate the microbial degradation of VCHs, and the degradation rate of various VCH components within 7 days was 82.38-92.38 %. The release rate of nutrient components in YH-1 increases with increasing VCH concentrations in groundwater; this could effectively prolong the action time of nutrient components, while also improving the degradation efficiency of pollutants with a sustained effect of more than 15 days. Simultaneously, owing to the fluidity, water solubility, and biodegradability of YH-1 in lithologic media, YH-1 injection did not cause blockage of the lithologic media in the aquifer. Through YH-1 stimulation, indigenous microorganisms grew rapidly in the underground environment, the diversity of microbial communities and the total number of species increased, and the correlation between genera strengthened. Simultaneously, YH-1 improved the ability of microbial community to convert inorganic electron donors/acceptors, thereby strengthening the co-metabolic mechanism between microorganisms. Additionally, there was a significant increase in the percentage of many microorganisms (e.g., Sphingomonas, Janthinobacterium, Duganella, etc.) that mediated the reductive dechlorination process and were redox inorganic electron donors/acceptors. This was conducive to the reductive dechlorination process of VCHs and achieved the efficient degradation of VCHs.
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Affiliation(s)
- Jili Wang
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, People's Republic of China; College of New Energy and Environment, Jilin University, Changchun 130021, People's Republic of China; Institute of Water Resources and Environment, Jilin University, Changchun 130021, People's Republic of China
| | - Yuling Zhang
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, People's Republic of China; College of New Energy and Environment, Jilin University, Changchun 130021, People's Republic of China; Institute of Water Resources and Environment, Jilin University, Changchun 130021, People's Republic of China.
| | - Qingchun Yang
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, People's Republic of China; College of New Energy and Environment, Jilin University, Changchun 130021, People's Republic of China
| | - Siqi Yin
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, People's Republic of China; College of New Energy and Environment, Jilin University, Changchun 130021, People's Republic of China; Institute of Water Resources and Environment, Jilin University, Changchun 130021, People's Republic of China
| | - Xi Wang
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, People's Republic of China; College of New Energy and Environment, Jilin University, Changchun 130021, People's Republic of China; Institute of Water Resources and Environment, Jilin University, Changchun 130021, People's Republic of China
| | - Ting Liu
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, People's Republic of China; College of New Energy and Environment, Jilin University, Changchun 130021, People's Republic of China; Institute of Water Resources and Environment, Jilin University, Changchun 130021, People's Republic of China
| | - Yujia Shi
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, People's Republic of China; College of New Energy and Environment, Jilin University, Changchun 130021, People's Republic of China; Institute of Water Resources and Environment, Jilin University, Changchun 130021, People's Republic of China
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Neshati J, Biabanaki F, Shariatmadari N. An investigation into the efficiency of electrokinetic and electrokinetic coupled with calcium peroxide permeable reactive barriers techniques for soil remediation using a statistical analysis. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 195:145. [PMID: 36418576 DOI: 10.1007/s10661-022-10736-y] [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: 11/09/2021] [Accepted: 11/05/2022] [Indexed: 06/16/2023]
Abstract
The current study emphasizes on the applicability of combining the electrokinetic (EK) and permeable reactive barriers (PRB) techniques compared to the simple EK technique. For this purpose, a statistical analysis is conducted using the Fractional Factorial Design statistical method. Also, General Linear Model and Two-sample T-Test analyzes are considered to clarify which type of soil remediation technique represents the highest efficiency. Calcium peroxide, an affordable material with easy capability for cultivation, is utilized in the PRB process to eliminate the soil from diesel contamination. The experiments were performed for 3 days and 10 days, according to which the initial contamination rates of 10 and 20% were selected, and the applied voltages were 20 V and 30 V. Using the innovative remediation technique, the experiments were conducted for 10 days with 20% initial pollution content and the applied voltage of 30 V, the initial gasoil content was about 190.5 mg/g, and after applying the proposed technique, the average final pollution content throughout soil reached approximately 37 mg/g. This experiment was also conducted for the approximately initial gasoil content of 185, 206, and 191 mg/g, which led to the removal efficiency of 79.59%, 78.93%, and 79.15%, respectively. The main novelty of this paper is attributed to the use of calcium peroxide in the EK-PRB technique and the statistical analysis conducted in this study that indicates the remarkable efficiency of the proposed approach. It was also revealed that the efficiency of the proposed technique is on par with the other state-of-art ones presented in the literature and even sometimes outperforms them.
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Affiliation(s)
- Jaber Neshati
- Research Institute of Petroleum Industry (RIPI), PO Box, 14665-137, Tehran, Iran.
| | - Faraz Biabanaki
- Dept. of Civil Engineering, Iran University of Science and Technology, Narmak, Tehran, 16846-13114, Iran
| | - Nader Shariatmadari
- Dept. of Civil Engineering, Iran University of Science and Technology, Narmak, Tehran, 16846-13114, Iran
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Tawfik A, Al-Sayed A, Hassan GK, Nasr M, El-Shafai SA, Alhajeri NS, Khan MS, Akhtar MS, Ahmad Z, Rojas P, Sanz JL. Electron donor addition for stimulating the microbial degradation of 1,4 dioxane by sequential batch membrane bioreactor: A techno-economic approach. CHEMOSPHERE 2022; 306:135580. [PMID: 35810864 DOI: 10.1016/j.chemosphere.2022.135580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/27/2022] [Accepted: 06/29/2022] [Indexed: 06/15/2023]
Abstract
The presence of 1,4 dioxane in wastewater is associated with severe health and environmental issues. The removal of this toxic contaminant from the industrial effluents prior to final disposal is necessary. The study comprehensively evaluates the performance of sequential batch membrane bioreactor (MBR) for treating wastewater laden with 1,4 dioxane. Acetate was supplemented to the wastewater feed as an electron donor for enhancing and stimulating the microbial growing activities towards the degradation of 1,4 dioxane. The removal efficiency of 1,4 dioxane was maximized to 87.5 ± 6.8% using an acetate to dioxane (A/D) ratio of 4.0, which was substantially dropped to 31.06 ± 3.7% without acetate addition. Ethylene glycol, glyoxylic acid, glycolic acid, and oxalic acid were the main metabolites of 1,4 dioxane biodegradation using mixed culture bacteria. The 1,4 dioxane degrading bacteria, particularly the genus of Acinetobacter, were promoted to 92% at the A/D ratio of 4.0. This condition encouraged as well the increase of the main 1,4 dioxane degraders, i.e., Xanthomonadales (12.5%) and Pseudomonadales (9.1%). However, 50% of the Sphingobacteriales and 82.5% of Planctomycetes were reduced due to the inhibition effect of the 1,4 dioxane contaminate. Similarly, the relative abundance of Firmicutes, Verrucomicrobia, Chlamydiae, Actinobacteria, Chloroflexi, and Nitrospirae was reduced in the MBR at the A/D ratio of 4.0. The results derived from the microbial analysis and metabolites detection at different A/D ratios indicated that acetate supplementation (as an electron donor) maintained an essential role in encouraging the microorganisms to produce the monooxygenase enzymes responsible for the biodegradation process. Economic feasibility of such a MBR system showed that for a designed flow rate of 30 m3∙d-1, the payback period from reusing the treated wastewater would reach 6.6 yr. The results strongly recommend the utilization of mixed culture bacteria growing on acetate for removing 1,4 dioxane from the wastewater industry, achieving dual environmental and economic benefits.
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Affiliation(s)
- Ahmed Tawfik
- National Research Centre, Water Pollution Research Department, 33 El-Bohouth St., Dokki, P.O. 12622, Giza, Egypt.
| | - Aly Al-Sayed
- National Research Centre, Water Pollution Research Department, 33 El-Bohouth St., Dokki, P.O. 12622, Giza, Egypt
| | - Gamal K Hassan
- National Research Centre, Water Pollution Research Department, 33 El-Bohouth St., Dokki, P.O. 12622, Giza, Egypt
| | - Mahmoud Nasr
- Sanitary Engineering Department, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt
| | - Saber A El-Shafai
- National Research Centre, Water Pollution Research Department, 33 El-Bohouth St., Dokki, P.O. 12622, Giza, Egypt
| | - Nawaf S Alhajeri
- Department of Environmental Technology Management, College of Life Sciences, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait.
| | - Mohd Shariq Khan
- Department of Chemical Engineering, Dhofar University, Salalah, 211, Oman
| | - Muhammad Saeed Akhtar
- School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.
| | - Zubair Ahmad
- School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.
| | - Patricia Rojas
- Universidad Autonoma de Madrid, Department of Molecular Biology, Madrid, 28049, Spain
| | - Jose L Sanz
- Universidad Autonoma de Madrid, Department of Molecular Biology, Madrid, 28049, Spain
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9
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Xu X, Wan S, Xia F, Han X, Deng S, Xiao H, Jiang Y, Liu H, Yang Y. Preparation and properties of the persulfate gel materials and application for the remediation of 2,4-dinitrotoluene contaminated groundwater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 843:157023. [PMID: 35772545 DOI: 10.1016/j.scitotenv.2022.157023] [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: 03/17/2022] [Revised: 06/20/2022] [Accepted: 06/24/2022] [Indexed: 06/15/2023]
Abstract
This study aims to develop persulfate new gel sustaining-release material (PGSR) and gelatin-gel sustaining-release material (G-PGSR) that can be injected into aquifers and slowly release S2O82- to groundwater. Compatibility and miscibility of colloidal silica gels and gelatin with S2O82- were tested. Morphologies of the as-prepared PGSR and G-PGSR were observed by scanning electron microscope (SEM) and Fourier transform infrared spectrometer (FT-IR). Release characteristics of PGSR containing variable persulfate concentrations (from 1.25 wt% to 5 wt%), silica sol (from 30 wt% to 40 wt%), and gelatin (from 0.5 wt% to 2.0 wt%) were monitored. Viscosities of PGSR solution increased from 5 to 112 cP with increasing silica sol from 30 wt% to 40 wt% during the first 10 min. Viscosities of PGSR solution in 40 wt% silica sol increased to 346 cP within the 30 min and rapidly increased to 8000 cP within the next 30 min followed by the gelation phase. Gelation rates of the PGSR solution increased with increased persulfate concentrations from 1.25 wt% to 5.0 wt%. The maximum release rates achieved at 5 h in G-PGSR were 1.98 mg of S2O82- per min similar to that in PGSR. The release persulfate concentrations in G-PGSR suggested that gelatin and colloidal silica were both compatible and miscible with S2O82-. Meanwhile, the PGSR exhibits a characteristic two-phase increase in viscosity with increased silica sol concentrations, persulfate concentrations, and gelatin concentrations. Compared with the persulfate only system, the degradation efficiency of 2,4-dinitrotoluene (2,4-DNT) was achieved 91.5 % within 3 h, while 78.6 % and 66.9 % degradation efficiency were shown in PGSR and G-PGSR, respectively. The PGSR and G-PGSR both could create persistent oxidation degradation of 2,4-DNT. Results suggested that colloidal silica and gelatin could be used to create PGSR and G-PGSR for persistent oxidation in groundwater remediation.
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Affiliation(s)
- Xiangjian Xu
- State Key Laboratory of Environmental Criteria and Risk Assessment and State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China
| | - Shuoyang Wan
- State Key Laboratory of Environmental Criteria and Risk Assessment and State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China
| | - Fu Xia
- State Key Laboratory of Environmental Criteria and Risk Assessment and State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China
| | - Xu Han
- State Key Laboratory of Environmental Criteria and Risk Assessment and State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China
| | - Sheng Deng
- State Key Laboratory of Environmental Criteria and Risk Assessment and State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China
| | - Han Xiao
- State Key Laboratory of Environmental Criteria and Risk Assessment and State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China
| | - Yonghai Jiang
- State Key Laboratory of Environmental Criteria and Risk Assessment and State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China
| | - Hui Liu
- State Key Laboratory of Environmental Criteria and Risk Assessment and State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China
| | - Yu Yang
- State Key Laboratory of Environmental Criteria and Risk Assessment and State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China.
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10
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Han K, Yeum Y, Yun G, Kim YW, Park CW, Kim Y. Evaluating the efficacy of slow-releasing carbon source tablets for in situ biological heterotrophic denitrification of groundwater. CHEMOSPHERE 2022; 304:135268. [PMID: 35690173 DOI: 10.1016/j.chemosphere.2022.135268] [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: 09/30/2021] [Revised: 05/24/2022] [Accepted: 06/05/2022] [Indexed: 06/15/2023]
Abstract
Slow-releasing precipitating tablets (SRPTs) and slow-releasing floating tablets (SRFTs) were formulated to release fumarate as a carbon source (CS) and/or electron donor (ED) in an in situ biological heterotrophic denitrification system. These tablets were prepared using pharmaceutical manufacturing. Soil column tests were conducted to evaluate nitrate denitrification efficacy, microbial population changes, and mass balance of fumarate and potential electron acceptors. Significant and simultaneous consumption of both fumarate and nitrate, and the production and consumption of nitrite were observed in both SRPT-treated and SRFT-treated soil columns. These results suggest that SRPT and SRFT releasing fumarate, induce heterotrophic biological denitrification. In the SRPT- and SRFT-treated columns, 65% and 73% of fumarate were associated with heterotrophic denitrification, respectively. Particularly, surplus citric acid, originally designed to serve as a floating agent, was utilized for 36% and 28% for SRFT flotation and denitrification, respectively. The results of 16s RNA analyses revealed that a bacterium that shared 99% 16s rRNA sequence similarity with those of Azoarcus sp. AN9, and Pseudogulbenkiania sp. NH8B, a facultative heterotrophic denitrifier, was detected in the column effluent. This study confirms that SRPT and SRFT can effectively operate long-term in situ biological denitrification processes, because it is possible to supply detailed CS and/or ED uniformly by applying both SRPT and SRFT in the well.
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Affiliation(s)
- Kyungjin Han
- Department of Environmental Engineering, Korea National University of Transportation, Chungju, 27469, Republic of Korea
| | - Yuhoon Yeum
- Department of Environmental Engineering, Korea University, Sejong, 30019, Republic of Korea
| | - Geumhee Yun
- Department of Environmental Engineering, Korea University, Sejong, 30019, Republic of Korea
| | - Young-Wan Kim
- Department of Food & Biotechnology, Korea University, Sejong, 30019, Republic of Korea
| | - Chun-Woong Park
- College of Pharmacy, Chungbuk National University, Cheongju, 36163, Republic of Korea
| | - Young Kim
- Department of Environmental Engineering, Korea University, Sejong, 30019, Republic of Korea.
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11
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Kim HB, Kim JG, Park J, Baek K. Control of arsenic release from paddy soils using alginate encapsulated calcium peroxide. JOURNAL OF HAZARDOUS MATERIALS 2022; 432:128751. [PMID: 35344889 DOI: 10.1016/j.jhazmat.2022.128751] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 03/10/2022] [Accepted: 03/19/2022] [Indexed: 06/14/2023]
Abstract
The mobilization of As in paddy soils is affected by iron redox cycles. In this regard, calcium peroxide (CaO2) can be used as an alternative to maintaining oxidizing conditions by liberating oxygen under flooding environments. Nevertheless, the problem of increase in pH by CaO2 dissolution remains unresolved. In this study, the encapsulation of CaO2 using alginate is proposed. Encapsulated CaO2 (CaO2-b) using 1% sodium alginate was applied to As-contaminated soil to evaluate the ability of pH control and As mobility during flooding conditions. The pH increased rapidly from 6.8 to 9.0 in unencapsulated CaO2 (CaO2-p) within 1 day, while CaO2-b increased slowly to 8.6 over 91 days. CaO2 created an oxidizing condition in the soil by providing oxygen, thus effectively prevented the reductive dissolution of iron. The mobility of As decreased by 50% (CaO2-p) and 83% (CaO2-b) compared with that of the control soil. Furthermore, the As in pore water was three times lower than CaO2-p because CaO2-b released 1.8 times more Ca2+ to form Ca-As complexes than CaO2-p. Consequently, the encapsulated CaO2 reduced the negative effects of CaO2 treatment on increasing pH of the soil and furnished a better environmental condition for inhibiting As mobility.
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Affiliation(s)
- Hye-Bin Kim
- Department of Environment and Energy (BK21 FOUR), Jeonbuk National University, Jeonju, Jeollabukdo 54896, Republic of Korea; Soil Environment Research Center, Jeonbuk National University, Jeonju, Jeollabukdo 54896, Republic of Korea
| | - Jong-Gook Kim
- Department of Environment and Energy (BK21 FOUR), Jeonbuk National University, Jeonju, Jeollabukdo 54896, Republic of Korea; Soil Environment Research Center, Jeonbuk National University, Jeonju, Jeollabukdo 54896, Republic of Korea
| | - Jin Park
- Department of Environment and Energy (BK21 FOUR), Jeonbuk National University, Jeonju, Jeollabukdo 54896, Republic of Korea; Soil Environment Research Center, Jeonbuk National University, Jeonju, Jeollabukdo 54896, Republic of Korea
| | - Kitae Baek
- Department of Environment and Energy (BK21 FOUR), Jeonbuk National University, Jeonju, Jeollabukdo 54896, Republic of Korea; Soil Environment Research Center, Jeonbuk National University, Jeonju, Jeollabukdo 54896, Republic of Korea; Department of Civil, Environmental, Resources and Energy Engineering, Jeonbuk National University, Jeonju, Jeollabukdo 54896, Republic of Korea.
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12
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Edoamodu CE, Nwodo UU. Thermo-active and alkaliphilic amalgamated laccase immobilized on sodium alginate for synthetic dye decolourization. BIOCATAL BIOTRANSFOR 2022. [DOI: 10.1080/10242422.2022.2078661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Chiedu E. Edoamodu
- Faculty of Science and Agriculture, University of Fort Hare, Alice, South Africa
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, South Africa
| | - Uchechukwu U. Nwodo
- Faculty of Science and Agriculture, University of Fort Hare, Alice, South Africa
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, South Africa
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13
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Wang B, Zheng S, Huang Z, Hu Y, Zhu K. Fabrication of H 2O 2 slow-releasing composites for simultaneous Microcystis mitigation and phosphate immobilization. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 798:149164. [PMID: 34325137 DOI: 10.1016/j.scitotenv.2021.149164] [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: 05/26/2021] [Revised: 07/05/2021] [Accepted: 07/16/2021] [Indexed: 06/13/2023]
Abstract
Hydrogen peroxide (H2O2) is a widely accepted algicide in controlling cyanobacterial blooms. However, this method includes two disadvantages: 1) a low H2O2 concentration (<5 mg L-1) is required; 2) H2O2-induced cell lysis causes phosphorus (P) contamination. To overcome the drawbacks, a H2O2 slow-releasing composite (HSRC) based on calcium peroxide (CaO2) was fabricated to substitute liquid H2O2. According to the results, a higher CaO2 dose increased H2O2 yield and releasing rate. H2O2 yield of 160 mg L-1 CaO2 in HSRC reached 32.9 mg L-1 and its releasing rate was 0.407 h-1. In addition, a higher temperature decreased H2O2 yield and increased H2O2-releasing rate. Besides, HSRC endowed with a remarkable ability to immobilize P. Higher CaO2 dose, pH value, and temperature increased the rate of P immobilization. The highest rate was 0.185 h-1, which occurred with 160 mg L-1 CaO2 in HSRC at 25 °C and pH 8.0. Toxicity assays showed that HSRC exerted sustaining oxidative stress on Microcystis aeruginosa. Accumulation of intracellular reactive oxygen species resulted in the disruption of enzymatic systems and inactivation of photosystem. Tracking the variations of cell growth and H2O2 concentration during HSRC treatments, it suggested that the lethal effect on Microcystis aeruginosa was achieved with a super-low H2O2 concentration (<0.3 mg L-1). In addition, cell lysis did not cause a sudden rise in P concentration due to the P immobilization by HSRC. Therefore, HSRC successfully offsets the drawbacks of liquid H2O2 in mitigating cyanobacterial blooms. It may be a novel and promising algicide that not only kills cyanobacteria but also reduces eutrophication momentarily.
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Affiliation(s)
- Binliang Wang
- School of Life Science, Shaoxing University, Shaoxing 312000, PR China
| | - Shuaibo Zheng
- School of Life Science, Shaoxing University, Shaoxing 312000, PR China
| | - Zongken Huang
- School of Life Science, Shaoxing University, Shaoxing 312000, PR China
| | - Yiwei Hu
- School of Life Science, Shaoxing University, Shaoxing 312000, PR China.
| | - Kongxian Zhu
- Changjiang River Scientific Research Institute, Wuhan 430000, PR China
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14
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Ali M, Tariq M, Sun Y, Huang J, Gu X, Ullah S, Nawaz MA, Zhou Z, Shan A, Danish M, Lyu S. Unveiling the catalytic ability of carbonaceous materials in Fenton-like reaction by controlled-release CaO 2 nanoparticles for trichloroethylene degradation. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:125935. [PMID: 34492864 DOI: 10.1016/j.jhazmat.2021.125935] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 04/13/2021] [Accepted: 04/18/2021] [Indexed: 06/13/2023]
Abstract
Carbonaceous materials (CMs) have been applied extensively for enhancing the catalytic performance of environmental catalysts, however, the self-catalytic mechanism of CMs for groundwater remediation is rarely investigated. Herein, we unveiled the catalytic ability of various CMs via Fe(III) reduction through polyvinyl alcohol-coated calcium peroxide nanoparticles (PVA@nCP) for trichloroethylene (TCE) removal. Among selected CMs (graphite (G), biochar (BC) and activated carbon (AC)), BC and AC showed enhancement of TCE removal of 89% and 98% via both adsorption and catalytic degradation. BET and SEM analyses showed a higher adsorption capacity of AC (27.8%) than others. The generation of solution-Fe(II) and surface-Fe(II) revealed the reduction of Fe(III) on CMs-surface. The role of O-containing groups was investigated by the FTIR technique and XPS quantified the 52% and 57% surface-Fe(II) in BC and AC systems, respectively. EPR and quenching tests confirmed that both solution and surface-bound species (HO•, O2-• and 1O2) contributed to TCE degradation. Acidic pH condition encouraged TCE removal and the presence of HCO3- negatively affected TCE removal than other inorganic ions. Both schemes (PVA@nCP/Fe(III)/BC and PVA@nCP/Fe(III)/AC) exhibited promising results in the actual groundwater, surfactant-amended solution, and removal of other chlorinated-pollutants, opening a new direction towards green environmental remediation for prolonged benefits.
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Affiliation(s)
- Meesam Ali
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China; Department of Chemical Engineering, Muhammad Nawaz Sharif University of Engineering and Technology, Multan 60000, Pakistan
| | - Muhammad Tariq
- Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences (CAS), Suzhou 215123, China
| | - Yong Sun
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Jingyao Huang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Xiaogang Gu
- Shanghai Urban Construction Design & Research Institute (Group) Co., Ltd, 3447 Dongfang Road, Shanghai 200125, China
| | - Sana Ullah
- Institute of Chemical Engineering and Technology, University of the Punjab, Lahore, Pakistan
| | - Muhammad Asif Nawaz
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Zhengyuan Zhou
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Ali Shan
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China; Department of Environmental Sciences, The University of Lahore, Lahore 46000, Pakistan
| | - Muhammad Danish
- Chemical Engineering Department University of Engineering and Technology (UET), Lahore (Faisalabad Campus), G.T. Road, Lahore, Pakistan
| | - Shuguang Lyu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
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15
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Zhou J, Li D, Zhao Z, Huang Y. Phosphorus bioavailability and the diversity of microbial community in sediment in response to modified calcium peroxide ceramsite capping. ENVIRONMENTAL RESEARCH 2021; 195:110682. [PMID: 33434607 DOI: 10.1016/j.envres.2020.110682] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 12/18/2020] [Accepted: 12/23/2020] [Indexed: 06/12/2023]
Abstract
Bioavailability of phosphorus (P) has close relationship with the microbial community in sediments and plays an important role in the sedimentary P release. However, little is known about the relationship between P bioavailability and microbial community under capping conditions. A 62-day experiment was conducted by capping with modified calcium peroxide ceramsite (MCPC) at different addition dosages (from 1:1 to 1:4, the ratio of mobile P in sediment to MCPC). P disappearance and release were expressed by the dissolved inorganic P (DIP) in overlying water. The results show that the proportion of disappeared P in released P was reduced sharply from 44% (Control) to 2% (1:4) under the capping with MCPC. Under the capping, the concentrations of DIP and Fe(Ⅱ) in pore water decreased markedly compared with the control, the removal up to 71.6% and 59.3% (mean, P < 0.05), respectively. The bioavailable P (BAP) presented the obvious decline under the capping with MCPC, which indicates the inhibition on the algae growth. The algae available P (AAP), water soluble P (WSP) and readily desorbable P (RDP) were reduced obviously at the 1:2 ratio compared with the other ratios. On the contrary, the biggest increase of Olsen-P in sediment was at the 1:2 ratio. This may be the explanation why the disappearance of DIP in the pore water was found. The result of microbial community structures in sediment shows that the relative abundance of Proteobacteria and Nitrospirae increased under the MCPC capping. It is analyzed that the microbial diversity is related negatively with the BAP in the sediments under the capping with MCPC, suggesting that microbial diversity is the key to control the BAP.
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Affiliation(s)
- Jing Zhou
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1, Kerui Road, Suzhou, 215009, China
| | - Dapeng Li
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1, Kerui Road, Suzhou, 215009, China.
| | - Zhehao Zhao
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1, Kerui Road, Suzhou, 215009, China
| | - Yong Huang
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1, Kerui Road, Suzhou, 215009, China
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16
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Ping Q, Zhang Z, Dai X, Li Y. Novel CaO 2 beads used in the anaerobic fermentation of iron-rich sludge for simultaneous short-chain fatty acids and phosphorus recovery under ambient conditions. BIORESOURCE TECHNOLOGY 2021; 322:124553. [PMID: 33359566 DOI: 10.1016/j.biortech.2020.124553] [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: 11/03/2020] [Revised: 12/11/2020] [Accepted: 12/13/2020] [Indexed: 06/12/2023]
Abstract
A novel composite CaO2 bead was prepared to improve total short-chain fatty acids (TSCFAs) production and phosphorus (P) recovery from iron-rich waste activated sludge (WAS) during ambient anaerobic fermentation. Results showed that CaO2 mass percentage of 5% and CaCl2:nylon66 = 1:1 (mass ratio) were the optimal prescription for the preparation of CaO2 beads with porous structure, loose morphology, and sustained-release of CaO2. The highest TSCFAs production (356 mg/g VSS) was observed and about 9% of P in sludge could be recovered on beads. The decrease of Fe-phosphate and Fe-oxides in the sludge were due to different mechanisms. Microbial community analyses showed that CaO2 beads effectively enriched dissimilatory iron-reducing bacteria (DIRB) and promoted iron-reduction related genes. After fermentation, the P-rich beads are easy to separate from sludge for further P recovery, and the supernatant carrying abundant acetate and Fe2+ can be returned to the wastewater treatment line to improve nutrient removal.
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Affiliation(s)
- Qian Ping
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
| | - Zhipeng Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
| | - Xiaohu Dai
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Yongmei Li
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
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17
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Ali M, Shan A, Sun Y, Gu X, Lyu S, Zhou Y. Trichloroethylene degradation by PVA-coated calcium peroxide nanoparticles in Fe(II)-based catalytic systems: enhanced performance by citric acid and nanoscale iron sulfide. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:3121-3135. [PMID: 32902746 DOI: 10.1007/s11356-020-10678-3] [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: 04/11/2020] [Accepted: 08/30/2020] [Indexed: 06/11/2023]
Abstract
In this study, the enhanced trichloroethylene (TCE) degradation performance was investigated by polyvinyl alcohol coated calcium peroxide nanoparticles (PVA@nCP) as an oxidant in Fe(II)-based catalytic systems. The nanoscale iron sulfide (nFeS), having an average particle size of 115.4 nm, was synthesized in the laboratory and characterized by SEM, TEM, HR-TEM along with EDS elemental mapping, XRD, FTIR, ICP-OES, and XPS techniques. In only ferrous iron catalyzed system (PVA@nCP/Fe(II)), TCE degradation was recorded at 58.9% in 6 h. In comparison, this value was increased to 97.5% or 99.7% with the addition of citric acid (CA) or nFeS in PVA@nCP/Fe(II) system, respectively. A comparative study was performed with optimum usages of chemical reagents in both PVA@nCP/Fe(II)/CA and PVA@nCP/Fe(II)/nFeS systems. Further, the probe compounds tests and electron paramagnetic resonance (EPR) analysis confirmed the generation of reactive oxygen species. The scavenging experiments elucidated the dominant role of HO• to TCE degradation, particularly in PVA@nCP/Fe(II)/nFeS system. Both CA and nFeS strengthened PVA@nCP/Fe(II) system, but displayed completely different mechanisms in the enhancement of active radicals generation; hence, their different contribution to TCE degradation. The acidic environment was favorable for TCE degradation, and a high concentration of HCO3- inhibited TCE removal in both systems. Conclusively, compared to PVA@nCP/Fe(II)/nFeS system, PVA@nCP/Fe(II)/CA system resulted in encouraging TCE degradation outcomes in actual groundwater, showing great potential for prolonged benefits in the remediation of TCE polluted groundwater. Graphical abstract.
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Affiliation(s)
- Meesam Ali
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China
- Department of Chemical Engineering, Muhammad Nawaz Sharif University of Engineering and Technology, Multan, 60000, Pakistan
| | - Ali Shan
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China
- Department of Environmental Sciences, The University of Lahore, Lahore, 46000, Pakistan
| | - Yong Sun
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China
| | - Xiaogang Gu
- Shanghai Urban Construction Design & Research Institute (Group) Co., Ltd, 3447 Dongfang Road, Shanghai, 200125, China
| | - Shuguang Lyu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China
| | - Yanbo Zhou
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China.
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China.
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18
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Ali M, Farooq U, Lyu S, Sun Y, Li M, Ahmad A, Shan A, Abbas Z. Synthesis of controlled release calcium peroxide nanoparticles (CR-nCPs): Characterizations, H2O2 liberate performances and pollutant degradation efficiency. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116729] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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19
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Ma Y, Feng Y, Feng Y, Liao G, Sun Y, Ma J. Characteristics and mechanisms of controlled-release KMnO 4 for groundwater remediation: Experimental and modeling investigations. WATER RESEARCH 2020; 171:115385. [PMID: 31855695 DOI: 10.1016/j.watres.2019.115385] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 12/03/2019] [Accepted: 12/08/2019] [Indexed: 06/10/2023]
Abstract
Controlled release materials (CRMs) are emerging oxidant delivery techniques for in-situ chemical oxidation (ISCO) for groundwater remediation. Successful implementation of CRM relies on good understandings of the kinetics and mechanism of controlled release of reactive agents. In this study, batch experiments and model simulations were conducted to explore the impacts of CRM properties (composition and size) and environmental conditions (temperature, pH, water volume and anions) on KMnO4 release from KMnO4 -paraffin controlled release beads. Experimental results indicated that higher KMnO4: paraffin mass ratio resulted in shorter release longevities and higher release rate. Larger bead resulted in lower release rate, longer release longevity, and more KMnO4 released. Higher incubation temperature resulted in higher release rate and shorter release longevity, but did not affect the total mass of KMnO4 released. Acidic pH decreased the total mass of KMnO4 released while alkaline pH did not affect KMnO4 release. The presence of SO42-, CO32-, Cl- and Br- had negligible impacts on KMnO4 release. A dissolution-diffusion conceptual model was developed. The above experimental observation and the associated controlled release mechanisms can be qualitatively explained by the conceptual model. A more detailed two-film boundary mathematical model was developed to simulate KMnO4 release process. Comparison of modeling results with experimental data suggest that the new mathematical model gave a good quantitatively predication. Overall, this study shows that properly designed CRM can sustain release for years, thus representing a cost-effective and low-maintenance groundwater remediation technology. Both CRM properties and environmental conditions significantly affect the release kinetics and longevity, therefore these factors should be considered in the design and maintenance of CRM-based ISCO system.
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Affiliation(s)
- Yao Ma
- State Key Laboratory of Heavy Oil Processing, Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum-Beijing, Beijing, 102249, China
| | - Yuan Feng
- State Key Laboratory of Heavy Oil Processing, Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum-Beijing, Beijing, 102249, China
| | - Yulin Feng
- State Key Laboratory of Heavy Oil Processing, Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum-Beijing, Beijing, 102249, China
| | - Gaoming Liao
- State Key Laboratory of Heavy Oil Processing, Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum-Beijing, Beijing, 102249, China
| | - Yue Sun
- State Key Laboratory of Heavy Oil Processing, Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum-Beijing, Beijing, 102249, China
| | - Jie Ma
- State Key Laboratory of Heavy Oil Processing, Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum-Beijing, Beijing, 102249, China.
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Liu M, Ran Y, Peng X, Zhu Z, Liang J, Ai H, Li H, He Q. Sustainable modulation of anaerobic malodorous black water: The interactive effect of oxygen-loaded porous material and submerged macrophyte. WATER RESEARCH 2019; 160:70-80. [PMID: 31132564 DOI: 10.1016/j.watres.2019.05.045] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 05/14/2019] [Accepted: 05/15/2019] [Indexed: 06/09/2023]
Abstract
Depleted oxygen (O2) in the sediment and overlying water of malodorous black water poses a potential threat to aquatic ecosystems. This study presents a method for sustainable regulation of the dissolved oxygen (DO) levels towards the malodorous black water. Oxygen-loaded natural porous materials were prepared by vacuum degassing to remove air from the pores and fill them with pure O2. Capping anaerobic sediment with the prepared 6 oxygen-loaded porous materials was effective in prompting the DO concentration of the malodorous black water. Although granules activated carbon (GAC) displayed the highest oxygen-loading capability, oxygen-loaded volcanic stone additive was more efficient for long-lasting combating of the anaerobic condition because the DO level at sediment-water interface (SWI) and the DO penetration depth showed approximately 5.38- and 3.75-fold increase, respectively, compared with the untreated systems. The improvement in DO was substantially enhanced in the presence of submerged macrophyte (Vallisneria natans), during which the release of O2 from oxygen-loaded volcanic stone facilitated the plant growth. With the joint efforts of the O2 released from volcanic stone and photosynthesis by the macrophytes, the DO levels were maintained at approximately 6.80 mg/L after a 41-day incubation, which exceeded (P < 0.05) the value in only oxygen-loaded volcanic stone or macrophytes added treatments. In addition to the elevated DO level, the combined employment of oxygen-loaded volcanic stone and macrophytes triggered a negative ammonia (NH4+-N) flux across the SWI and an 85.82% reduction of methane (CH4) production compared with those without treatment, accompanied by a decrease in total inorganic carbon and a 2.55- fold increasing of submerged macrophyte biomass, which is presumably attributed to nitrification, remineralization, and assimilation. The results obtained here shed a degree of light on the sustainable modulation of the anaerobic condition in malodorous black water.
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Affiliation(s)
- Ming Liu
- Key Laboratory of Eco-Environment of Three Gorges Region, Ministry of Education, Chongqing University, Chongqing 400044, China
| | - Yan Ran
- Key Laboratory of Eco-Environment of Three Gorges Region, Ministry of Education, Chongqing University, Chongqing 400044, China
| | - Xinxin Peng
- Key Laboratory of Eco-Environment of Three Gorges Region, Ministry of Education, Chongqing University, Chongqing 400044, China
| | - Zhiqiang Zhu
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, Institute of Tropical Crops, Hainan University, Haikou 570228, China
| | - Jialiang Liang
- Key Laboratory of Eco-Environment of Three Gorges Region, Ministry of Education, Chongqing University, Chongqing 400044, China
| | - Hainan Ai
- Key Laboratory of Eco-Environment of Three Gorges Region, Ministry of Education, Chongqing University, Chongqing 400044, China
| | - Hong Li
- Key Laboratory of Eco-Environment of Three Gorges Region, Ministry of Education, Chongqing University, Chongqing 400044, China.
| | - Qiang He
- Key Laboratory of Eco-Environment of Three Gorges Region, Ministry of Education, Chongqing University, Chongqing 400044, China.
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21
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Yang GCC. Integrated electrokinetic processes for the remediation of phthalate esters in river sediments: A mini-review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 659:963-972. [PMID: 31096426 DOI: 10.1016/j.scitotenv.2018.12.334] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 11/29/2018] [Accepted: 12/22/2018] [Indexed: 06/09/2023]
Abstract
Concerning the contamination of phthalate esters (PAEs) in river sediments, this mini-review introduces four recently reported novel "integrated electrokinetic (EK) processes" for the remediation purpose, namely two combined technologies of the EK process and advanced oxidation process (EK-AOP Processes) and two combined technologies of the EK process and biological process (EK-BIO Processes). The following is a comprehensive summary for these remediation processes: (1) the EK process coupled with nano-Fe3O4/S2O82- oxidation process - Test results have shown that nanoscale Fe3O4 played a significant role in activating persulfate oxidation. Even a recalcitrant compound like di(2‑ethylhexyl)phthalate (DEHP), its concentration in test sediment was reduced to 1.97 mg kg-1, far below the regulatory levels set by Taiwan EPA; (2) the EK process integrated with a novel Fenton-like process catalyzed by nanoscale schwertmannite (nano-SHM) - Test results have revealed that simultaneous injection of nano-SHM slurry and H2O2 into the anode reservoir and sediment compartment is a good practice. 70-99% in removal efficiency was obtained for various target PAEs; (3) enhanced in situ bioremediation coupled with the EK process for promoting the growth of intrinsic microorganisms by adding H2O2 as an oxygen release compound (ORC) - Test results have demonstrated that an intermittent mode of injecting lab-prepared ORC directly into the contaminant zone would be beneficial to the growth of intrinsic microorganisms in test sediment for in situ bioremediation of target PAEs; and (4) coupling of a second-generation ORC (designated 2G-ORC) with the EK-biological process - Test results have proved that 2G-ORC is long-lasting and can be directly utilized as the carbon source and oxygen source for microbial growth resulting in an enhanced biodegradation of PAEs. Except DEHP having a residual concentration of 4 μg kg-1, all other target PAEs in test sediment were totally removed by this novel combined remediation process.
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Affiliation(s)
- Gordon C C Yang
- Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan.
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22
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Gholami F, Mosmeri H, Shavandi M, Dastgheib SMM, Amoozegar MA. Application of encapsulated magnesium peroxide (MgO 2) nanoparticles in permeable reactive barrier (PRB) for naphthalene and toluene bioremediation from groundwater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 655:633-640. [PMID: 30476844 DOI: 10.1016/j.scitotenv.2018.11.253] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 11/16/2018] [Accepted: 11/17/2018] [Indexed: 06/09/2023]
Abstract
One of the challenges in the petroleum hydrocarbon contaminated groundwater remediation by oxygen releasing compounds (ORCs) is to identify the remediation mechanism and determine the impact of ORCs on the environment and the intrinsic groundwater microorganisms. In this research, the application of encapsulated magnesium peroxide (MgO2) nanoparticles in the permeable reactive barrier (PRB) for bioremediation of the groundwater contaminated by toluene and naphthalene was studied in the continuous flow sand-packed plexiglass columns within 50 d experiments. For the biodiversity studies, next generation sequencing (NGS) of the 16S rRNA gene was applied. The results showed that naphthalene was metabolized (within 20 days) faster than toluene (after 30 days) by microorganisms of the aqueous phase. By comparing the contaminant removal in the biotic (which resulted in the complete contaminant removal) and abiotic (around 32% removal for naphthalene and 36% for toluene after 50 d) conditions, the significant role of microorganisms on the decontamination process was proved. Furthermore, the attached microbial communities on the porous media were visualized by scanning electron microscopy (SEM). Microbial community structure analysis by NGS technique revealed that the microbial species which were able to degrade toluene and naphthalene such as P. putida and P. mendocina respectively were stimulated by addition of MgO2 nanoparticles. The presented study resulted in a momentous insight into the application of MgO2 nanoparticles in the hydrocarbon compounds removal from groundwater.
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Affiliation(s)
- Fatemeh Gholami
- Department of Microbiology, College of Science, University of Tehran, Tehran, Iran
| | - Hamid Mosmeri
- Ecology and Environmental Pollution Control Research Group, Research Institute of Petroleum Industry, Tehran, Iran
| | - Mahmoud Shavandi
- Ecology and Environmental Pollution Control Research Group, Research Institute of Petroleum Industry, Tehran, Iran.
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23
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Gholami F, Shavandi M, Dastgheib SMM, Amoozegar MA. Naphthalene remediation form groundwater by calcium peroxide (CaO 2) nanoparticles in permeable reactive barrier (PRB). CHEMOSPHERE 2018; 212:105-113. [PMID: 30144671 DOI: 10.1016/j.chemosphere.2018.08.056] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 08/09/2018] [Accepted: 08/13/2018] [Indexed: 06/08/2023]
Abstract
This study investigated the applicability of synthesized calcium peroxide (CaO2) nanoparticles for naphthalene bioremediation by permeable reactive barrier (PRB) from groundwater. According to the batch experiments the application of 400 mg/L of CaO2 nanoparticles was the optimum concentration for naphthalene (20 mg/L) bioremediation. Furthermore, the effect of environmental conditions on the stability of nanoparticles showed the tremendous impacts of the initial pH and temperature on the stability and oxygen releasing potential of CaO2. Therefore, raising the initial pH from 3 to 12 elevated the dissolved oxygen from 4 to 13.6 mg/L and the stability of nanoparticles was significantly improved around 70 d. Moreover, by increasing the temperature from 4 to 30 °C, the stability of CaO2 declined from 120 to 30 d. The continuous-flow experiments revealed that the naphthalene-contaminated groundwater was completely bio-remediated in the presence of CaO2 nanoparticles and microorganisms from the effluent of the column within 50 d. While, the natural remediation of the contaminant resulted in 19.7% removal at the end of the experiments (350 d). Additionally, the attached biofilm on the surface of the PRB zone was studied by scanning electron microscopy (SEM) which showed the higher biofilm formation on the pumice surfaces in the bioremediation column in comparison to the natural remediation column. The physic-chemical characteristics of the effluents from each column was also analyzed and indicated no negative impact of the bioremediation process on the groundwater. Consequently, the present paper provides a comprehensive study on the application of the CaO2 nanoparticles in PAH-contaminated groundwater treatment.
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Affiliation(s)
- Fatemeh Gholami
- Extremophiles Laboratory, Department of Microbiology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran
| | - Mahmoud Shavandi
- Environment and Biotechnology Research Division, Research Institute of Petroleum Industry, Tehran, Iran
| | - Seyed Mohammad Mehdi Dastgheib
- Microbiology and Biotechnology Group, Environment and Biotechnology Research Division, Research Institute of Petroleum Industry, Tehran, Iran
| | - Mohammad Ali Amoozegar
- Extremophiles Laboratory, Department of Microbiology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran.
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24
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Myers MA, Johnson NW, Marin EZ, Pornwongthong P, Liu Y, Gedalanga PB, Mahendra S. Abiotic and bioaugmented granular activated carbon for the treatment of 1,4-dioxane-contaminated water. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 240:916-924. [PMID: 29879691 DOI: 10.1016/j.envpol.2018.04.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 03/07/2018] [Accepted: 04/02/2018] [Indexed: 06/08/2023]
Abstract
1,4-Dioxane is a probable human carcinogen and an emerging contaminant that has been detected in surface water and groundwater resources. Many conventional water treatment technologies are not effective for the removal of 1,4-dioxane due to its high water solubility and chemical stability. Biological degradation is a potentially low-cost, energy-efficient approach to treat 1,4-dioxane-contaminated waters. Two bacterial strains, Pseudonocardia dioxanivorans CB1190 (CB1190) and Mycobacterium austroafricanum JOB5 (JOB5), have been previously demonstrated to break down 1,4-dioxane through metabolic and co-metabolic pathways, respectively. However, both CB1190 and JOB5 have been primarily studied in laboratory planktonic cultures, while most environmental microbes grow in biofilms on surfaces. Another treatment technology, adsorption, has not historically been considered an effective means of removing 1,4-dioxane due to the contaminant's low Koc and Kow values. We report that the granular activated carbon (GAC), Norit 1240, is an adsorbent with high affinity for 1,4-dioxane as well as physical dimensions conducive to attached bacterial growth. In abiotic batch reactor studies, 1,4-dioxane adsorption was reversible to a large extent. By bioaugmenting GAC with 1,4-dioxane-degrading microbes, the adsorption reversibility was minimized while achieving greater 1,4-dioxane removal when compared with abiotic GAC (95-98% reduction of initial 1,4-dioxane as compared to an 85-89% reduction of initial 1,4-dioxane, respectively). Bacterial attachment and viability was visualized using fluorescence microscopy and confirmed by amplification of taxonomic genes by quantitative polymerase chain reaction (qPCR) and an ATP assay. Filtered samples of industrial wastewater and contaminated groundwater were also tested in the bioaugmented GAC reactors. Both CB1190 and JOB5 demonstrated 1,4-dioxane removal greater than that of the abiotic adsorbent controls. This study suggests that bioaugmented adsorbents could be an effective technology for 1,4-dioxane removal from contaminated water resources.
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Affiliation(s)
- Michelle A Myers
- Department of Civil and Environmental Engineering, University of California, Los Angeles, 420 Westwood Plaza, 5732 Boelter Hall, Los Angeles, CA, 90095, USA
| | - Nicholas W Johnson
- Department of Civil and Environmental Engineering, University of California, Los Angeles, 420 Westwood Plaza, 5732 Boelter Hall, Los Angeles, CA, 90095, USA
| | - Erick Zerecero Marin
- Department of Civil and Environmental Engineering, University of California, Los Angeles, 420 Westwood Plaza, 5732 Boelter Hall, Los Angeles, CA, 90095, USA
| | - Peerapong Pornwongthong
- Department of Agro-Industrial, Food and Environmental Technology, Faculty of Applied Science, King Mongkut's University of Technology North Bangkok, 1518 Pracharat 1, Wongsawang, Bangsue, Bangkok, 10800, Thailand; Center for Water Engineering and Infrastructure Research (CWEIR), King Mongkut's University of Technology North Bangkok, Wongsawang, Bangsue, Bangkok, 10800, Thailand
| | - Yun Liu
- Department of Civil and Environmental Engineering, University of California, Los Angeles, 420 Westwood Plaza, 5732 Boelter Hall, Los Angeles, CA, 90095, USA; Institute of Soil Science, Chinese Academy of Sciences, 71 East Beijing Road, Nanjing, Jiangsu Province, 210008, People's Republic of China
| | - Phillip B Gedalanga
- Department of Civil and Environmental Engineering, University of California, Los Angeles, 420 Westwood Plaza, 5732 Boelter Hall, Los Angeles, CA, 90095, USA; Department of Health Science, California State University, Fullerton, 800 North State College Blvd, Room KHS-121, Fullerton, CA, 92834, USA
| | - Shaily Mahendra
- Department of Civil and Environmental Engineering, University of California, Los Angeles, 420 Westwood Plaza, 5732 Boelter Hall, Los Angeles, CA, 90095, USA.
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25
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O'Connor D, Hou D, Ok YS, Song Y, Sarmah AK, Li X, Tack FM. Sustainable in situ remediation of recalcitrant organic pollutants in groundwater with controlled release materials: A review. J Control Release 2018; 283:200-213. [DOI: 10.1016/j.jconrel.2018.06.007] [Citation(s) in RCA: 138] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 06/02/2018] [Accepted: 06/04/2018] [Indexed: 11/29/2022]
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26
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Yeh CS, Wang R, Chang WC, Shih YH. Synthesis and characterization of stabilized oxygen-releasing CaO 2 nanoparticles for bioremediation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 212:17-22. [PMID: 29427937 DOI: 10.1016/j.jenvman.2018.01.068] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 01/01/2018] [Accepted: 01/24/2018] [Indexed: 06/08/2023]
Abstract
Bioremediation is one of the general methods to treat pollutants in soil, sediment, and groundwater. However, the low concentration and restricted dispersion of dissolved oxygen (DO) in these areas have limited the efficiency of remediation especially for microorganisms that require oxygen to grow. Calcium peroxide (CaO2) is one of the oxygen-releasing compounds and has been applied to magnify the remediation efficacy of polluting areas. In this study, CaO2 nanoparticles (NPs) were synthesized and evaluated by wet chemistry methods as well as dry and wet grinding processes. The characteristics of CaO2 particles and NPs were analyzed and compared by dynamic light scattering, transmission electron microscopy, scanning electron microscopy, and X-ray powder diffraction. Our results showed that wet-grinded CaO2 NPs had an average particle size of around 110 nm and were more stable compared to other particles from aggregation and sedimentation tests. In addition, we also observed that CaO2 NPs had better DO characteristics and patterns; these NPs generated higher DO levels than their non-grinded form. Accordingly, our results suggested that wet-grinding CaO2 particles to nanoscale could benefit their usage in bioremediation.
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Affiliation(s)
- Chia-Shen Yeh
- Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan
| | - Reuben Wang
- Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan
| | - Wen-Chi Chang
- Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan
| | - Yang-Hsin Shih
- Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan.
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27
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Lhotský O, Krákorová E, Linhartová L, Křesinová Z, Steinová J, Dvořák L, Rodsand T, Filipová A, Kroupová K, Wimmerová L, Kukačka J, Cajthaml T. Assessment of biodegradation potential at a site contaminated by a mixture of BTEX, chlorinated pollutants and pharmaceuticals using passive sampling methods - Case study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 607-608:1451-1465. [PMID: 28763941 DOI: 10.1016/j.scitotenv.2017.06.193] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 06/22/2017] [Accepted: 06/23/2017] [Indexed: 06/07/2023]
Abstract
The present study describes a pilot remediation test of a co-mingled plume containing BTEX, chlorinated pollutants and pharmaceuticals. Remediation was attempted using a combination of various approaches, including a pump and treat system applying an advanced oxidation process and targeted direct push injections of calcium peroxide. The remediation process was monitored intensively and extensively throughout the pilot test using various conventional and passive sampling methods, including next-generation amplicon sequencing. The results showed that the injection of oxygen-saturated treated water with residual hydrogen peroxide and elevated temperature enhanced the in situ removal of monoaromatics and chlorinated pollutants. In particular, in combination with the injection of calcium peroxide, the conditions facilitated the in situ bacterial biodegradation of the pollutants. The mean groundwater concentration of benzene decreased from 1349μg·L-1 prior to the test to 3μg·L-1 within 3months after the calcium peroxide injections; additionally, monochlorobenzene decreased from 1545μg·L-1 to 36μg·L-1, and toluene decreased from 143μg·L-1 to 2μg·L-1. Furthermore, significant degradation of the contaminants bound to the soil matrix in less permeable zones was observed. Based on a developed 3D model, 90% of toluene and 88% of chlorobenzene bound to the soil were removed during the pilot test, and benzene was removed almost completely. On the other hand, the psychopharmaceuticals were effectively removed by the employed advanced oxidation process only from the treated water, and their concentration in groundwater remained stagnant due to inflow from the surroundings and their absence of in situ degradation. The employment of passive sampling techniques, including passive diffusion bags (PDB) for volatile organic pollutants and their respective transformation products, polar organic compound integrative samplers (POCIS) for the pharmaceuticals and in situ soil microcosms for microbial community analysis, was proven to be suitable for monitoring remediation in saturated zones.
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Affiliation(s)
- Ondřej Lhotský
- DEKONTA a.s., Volutová 2523, CZ-158 00 Prague 5, Czech Republic; Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01 Prague 2, Czech Republic
| | - Eva Krákorová
- DEKONTA a.s., Volutová 2523, CZ-158 00 Prague 5, Czech Republic; Institute of Microbiology Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, CZ-142 20 Prague 4, Czech Republic
| | - Lucie Linhartová
- Institute of Microbiology Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, CZ-142 20 Prague 4, Czech Republic
| | - Zdena Křesinová
- Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01 Prague 2, Czech Republic; Institute of Microbiology Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, CZ-142 20 Prague 4, Czech Republic
| | - Jana Steinová
- Technical University of Liberec, Studentská 2, CZ-461 17 Liberec, Czech Republic
| | - Lukáš Dvořák
- Technical University of Liberec, Studentská 2, CZ-461 17 Liberec, Czech Republic
| | - Torgeir Rodsand
- ALS Laboratory Group Norway AS, Drammensveien 173, N-0214 Oslo, Norway
| | - Alena Filipová
- Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01 Prague 2, Czech Republic; Institute of Microbiology Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, CZ-142 20 Prague 4, Czech Republic
| | - Kristýna Kroupová
- Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01 Prague 2, Czech Republic
| | - Lenka Wimmerová
- ALS Laboratory Group Norway AS, Drammensveien 173, N-0214 Oslo, Norway; Department of Applied Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ-165 00 Prague 6, Czech Republic
| | - Jan Kukačka
- DEKONTA a.s., Volutová 2523, CZ-158 00 Prague 5, Czech Republic
| | - Tomáš Cajthaml
- Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01 Prague 2, Czech Republic; Institute of Microbiology Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, CZ-142 20 Prague 4, Czech Republic.
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28
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Zhou Y, Fang X, Zhang Z, Hu Y, Lu J. An oxygen slow-releasing material and its application in water remediation as oxygen supplier. ENVIRONMENTAL TECHNOLOGY 2017; 38:2793-2799. [PMID: 28041538 DOI: 10.1080/09593330.2016.1278275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 12/26/2016] [Indexed: 06/06/2023]
Abstract
In this study, an oxygen slow-releasing material (OSRM) consisting of calcium peroxide (CaO2), stearic acid (SA) and quartz sand was used to improve oxygen supply during bioremediation. The oxygen-releasing rates of CaO2 powder and OSRM with different SA contents were investigated. The efficacy of OSRM as an oxygen supplier was assessed by water remediation experiments using activated sludge. Results showed that CaO2 powder was effectively embedded by SA under anhydrous conditions. The oxygen-releasing rate decreased with increasing SA contents. Moreover, the OSRM exhibited higher oxygen-releasing capacity, and more effective pH control ability than CaO2 powder. The water remediation experiments showed better removal of COD and [Formula: see text] with OSRM as the oxygen supplier. These results provided detailed information when CaO2 was applied as the oxygen supplier in water remediation, which can serve as references for field application of bioremediation.
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Affiliation(s)
- Yanbo Zhou
- a Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education , East China University of Science and Technology , Shanghai , People's Republic of China
| | - Xingbin Fang
- a Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education , East China University of Science and Technology , Shanghai , People's Republic of China
| | - Zhiqing Zhang
- a Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education , East China University of Science and Technology , Shanghai , People's Republic of China
| | - Yonghua Hu
- a Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education , East China University of Science and Technology , Shanghai , People's Republic of China
| | - Jun Lu
- a Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education , East China University of Science and Technology , Shanghai , People's Republic of China
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29
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Seifan M, Samani AK, Berenjian A. A novel approach to accelerate bacterially induced calcium carbonate precipitation using oxygen releasing compounds (ORCs). BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2017. [DOI: 10.1016/j.bcab.2017.10.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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30
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Zhang X, Gu X, Lu S, Brusseau ML, Xu M, Fu X, Qiu Z, Sui Q. Application of ascorbic acid to enhance trichloroethene degradation by Fe(III)-activated calcium peroxide. CHEMICAL ENGINEERING JOURNAL (LAUSANNE, SWITZERLAND : 1996) 2017; 325:188-198. [PMID: 29104449 PMCID: PMC5665388 DOI: 10.1016/j.cej.2017.05.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The enhancement effect of an environmentally friendly reducing agent, ascorbic acid (AA), on trichloroethene (TCE) degradation by Fe(III)-activated calcium peroxide (CP) was evaluated. The addition of AA accelerated the transformation of Fe(III) to Fe(II), and the complexation of Fe(III)/Fe(II) with AA and its products alleviated the precipitation of dissolved iron. These impacts enhanced the generation of reactive oxygen species (ROSs). Investigation of ROSs using chemical probe tests, electron paramagnetic resonance (EPR) tests, and radical scavenger tests strongly confirm large production of hydroxyl radicals (HO•) that is responsible for TCE degradation. The generation of Cl- from the degraded TCE was complete in the enhanced CP/Fe(III)/AA system. The investigation of solution matrix effects showed that the TCE degradation rate decreases with the increase in solution pH, while Cl-, SO42- and NO3- anions have minor impact. Conversely, HCO3- significantly inhibited TCE degradation due to pH elevation and HO• scavenging. The results of experiments performed using actual groundwater indicated that an increase in reagent doses are required for effective TCE removal. In summary, the potential effectiveness of the CP/Fe(III)/AA oxidation system for remediation of TCE contaminated groundwater has been demonstrated. Additional research is needed to develop the system for practical implementation.
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Affiliation(s)
- Xiang Zhang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Xiaogang Gu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Shuguang Lu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Mark L. Brusseau
- Soil, Water and Environmental Science Department, School of Earth and Environmental Sciences, The University of Arizona, 429 Shantz Building, Tucson, AZ 85721, United States
| | - Minhui Xu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Xiaori Fu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Zhaofu Qiu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Qian Sui
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
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31
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Lu S, Zhang X, Xue Y. Application of calcium peroxide in water and soil treatment: A review. JOURNAL OF HAZARDOUS MATERIALS 2017; 337:163-177. [PMID: 28525879 DOI: 10.1016/j.jhazmat.2017.04.064] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 03/31/2017] [Accepted: 04/26/2017] [Indexed: 06/07/2023]
Abstract
Calcium peroxide (CP) has been progressively applied in terms of environmental protection due to its certain physical and chemical properties. This review focuses on the latest progresses in the applications of CP in water and soil treatment, including wastewater treatment, surface water restoration and groundwater and soil remediation. The stability of CP makes it an effective solid phase to supply H2O2 and O2 for aerobic biodegradation and chemical degradation of contaminants in water and soil. CP has exerted great performance in the removal of dyes, chlorinated hydrocarbons, petroleum hydrocarbons, pesticides, heavy metals and various other contaminants. The research progress in the encapsulation technologies of CP with other materials and the preparation of CP nanoparticles were also presented in this review. Based on the summarized research progresses, the perspective of CP application in the future was proposed.
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Affiliation(s)
- Shuguang Lu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
| | - Xiang Zhang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Yunfei Xue
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
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Bioremediation of benzene from groundwater by calcium peroxide (CaO2) nanoparticles encapsulated in sodium alginate. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2017.06.020] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Mosmeri H, Alaie E, Shavandi M, Dastgheib SMM, Tasharrofi S. Benzene-contaminated groundwater remediation using calcium peroxide nanoparticles: synthesis and process optimization. ENVIRONMENTAL MONITORING AND ASSESSMENT 2017; 189:452. [PMID: 28808820 DOI: 10.1007/s10661-017-6157-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 08/01/2017] [Indexed: 06/07/2023]
Abstract
Nano-size calcium peroxide (nCaO2) is an appropriate oxygen source which can meet the needs of in situ chemical oxidation (ISCO) for contaminant remediation from groundwater. In the present study, an easy to handle procedure for synthesis of CaO2 nanoparticles has been investigated. Modeling and optimization of synthesis process was performed by application of response surface methodology (RSM) and central composite rotatable design (CCRD) method. Synthesized nanoparticles were characterized by XRD and FESEM techniques. The optimal synthesis conditions were found to be 5:1, 570 rpm and 10 °C for H2O2:CaSO2 ratio, mixing rate and reaction temperature, respectively. Predicted values showed to be in good agreement with experimental results (R 2 values were 0.915 and 0.965 for CaO2 weight and nanoparticle size, respectively). To study the efficiency of synthesized nanoparticles for benzene removal from groundwater, batch experiments were applied in biotic and abiotic (chemical removal) conditions by 100, 200, 400, and 800 mg/L of nanoparticles within 70 days. Results indicated that application of 400 mg/L of CaO2 in biotic condition was able to remediate benzene completely from groundwater after 60 days. Furthermore, comparison of biotic and abiotic experiments showed a great potential of microbial stimulation using CaO2 nanoparticles in benzene remediation from groundwater.
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Affiliation(s)
- Hamid Mosmeri
- Ecology and Environmental Pollution Control Research Group, Environment and Biotechnology Research Division, Research Institute of Petroleum Industry, Tehran, Iran
| | - Ebrahim Alaie
- Environment and Biotechnology Division, Research Institute of Petroleum Industry, Tehran, Iran.
| | - Mahmoud Shavandi
- Ecology and Environmental Pollution Control Research Group, Environment and Biotechnology Research Division, Research Institute of Petroleum Industry, Tehran, Iran
| | - Seyed Mohammad Mehdi Dastgheib
- Microbiology and Biotechnology Group, Environment and Biotechnology Research Division, Research Institute of Petroleum Industry, Tehran, Iran
| | - Saeideh Tasharrofi
- Ecology and Environmental Pollution Control Research Group, Environment and Biotechnology Research Division, Research Institute of Petroleum Industry, Tehran, Iran
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Luo L, He H, Yang C, Wen S, Zeng G, Wu M, Zhou Z, Lou W. Nutrient removal and lipid production by Coelastrella sp. in anaerobically and aerobically treated swine wastewater. BIORESOURCE TECHNOLOGY 2016; 216:203-10. [PMID: 27236400 DOI: 10.1016/j.biortech.2016.05.077] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 05/18/2016] [Accepted: 05/19/2016] [Indexed: 05/07/2023]
Abstract
Coelastrella sp. QY01, a microalgae species isolated from a local pond, was identified and used for the treatment of anaerobically and aerobically treated swine wastewater (AnATSW). Microalgal growth characteristics, nutrient removal and lipid accumulation of QY01 cultivated in the initial concentration of AnATSW ranged from 63 to 319mg NH3-N/L were examined. The specific growth rate of QY01 cultivated in cultures ranged from 0.269 to 0.325day(-1) with a biomass productivity from 42.77 to 57.46mgL(-1)day(-1). Removal rates for NH3-N, TP and inorganic carbon in AnATSW at the various nutrient concentrations ranged from 90% to 100%, from 90% to 100% and from 74% to 78%, respectively. The lipid content of QY01 ranged from 22.4% to 24.8%. The lipid productivity was positive correlation with the biomass productivity. 40% AnATSW was optimal for QY01 cultivation, in which nutrient removal and productivity of biomass and lipid were maximized.
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Affiliation(s)
- Le Luo
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Huijun He
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Chunping Yang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Shan Wen
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Mengjie Wu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Zili Zhou
- Hunan Hikee Environmental Technology Co., Ltd., Changsha 410001, PR China
| | - Wei Lou
- Hunan Hikee Environmental Technology Co., Ltd., Changsha 410001, PR China
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Kaewdee P, Chandet N, Rujijanagul G, Randorn C. Multicatalytic properties of nanoparticle CaO2 synthesized by a novel, simple and economical method for wastewater treatment. CATAL COMMUN 2016. [DOI: 10.1016/j.catcom.2016.06.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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