1
|
Sun J, Wang L, Yu J, Guo B, Chen L, Zhang Y, Wang D, Shen Z, Tsang DCW. Cytotoxicity of stabilized/solidified municipal solid waste incineration fly ash. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127369. [PMID: 34879564 DOI: 10.1016/j.jhazmat.2021.127369] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 09/19/2021] [Accepted: 09/26/2021] [Indexed: 06/13/2023]
Abstract
Low-carbon stabilization/solidification (S/S) is of increasing importance as an option for the treatment of municipal solid waste incineration fly ash (MIFA). This study tailored four binders (e.g., ordinary Portland cement (OPC), calcium aluminate cement (CAC), phosphate-modified OPC, and phosphate-modified CAC) for S/S of MIFA and evaluated the cytotoxicity of treated MIFA by using A549 cell-based in-vitro assay. After S/S treatment, the leachability of Cr, Cu, Zn and Pb from MIFA decreased by 76.1%, 93.4%, 69.6%, and 85.5%, respectively. Spectroscopic analysis indicated that the hydration products determined the immobilization efficiencies of various binders, and strong bonding between metallic cations and phosphate enhanced the immobilization efficiency. The treated MIFA showed significantly lower cellular reactive oxygen species (ROS)-inducing abilities than original MIFA, in which with phosphate-modified OPC treated MIFA showed the lowest ROS levels. Intracellular ROS and multicytotoxicity results also revealed that the treated MIFA not only decreased the cytotoxicity-inducing capability but also enhanced the tolerant dosage of cytotoxicity, in which phosphate-modified S/S treatments showed more effective mitigation (25% less cytotoxicity) than plain cement treatments due to the high-efficiency immobilization of potentially toxic elements. This study develops a pioneering assessment protocol to measure the success of sustainable treatment of MIFA in human health perspective.
Collapse
Affiliation(s)
- Jian Sun
- Department of Environmental Sciences and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Lei Wang
- Institute of Construction Materials, Technische Universität Dresden, 01062 Dresden, Germany.
| | - Jinjin Yu
- School of Pharmacy, Xi'an Jiaotong University, Xi'an 710061, China
| | - Binglin Guo
- Department of Earth Resources Engineering, Kyushu University, Fukuoka 819-0395, Japan
| | - Liang Chen
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Yuying Zhang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Diwei Wang
- Department of Environmental Sciences and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Zhenxing Shen
- Department of Environmental Sciences and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| |
Collapse
|
2
|
Ghanbari F, Wang Q, Hassani A, Wacławek S, Rodríguez-Chueca J, Lin KYA. Electrochemical activation of peroxides for treatment of contaminated water with landfill leachate: Efficacy, toxicity and biodegradability evaluation. CHEMOSPHERE 2021; 279:130610. [PMID: 34134413 DOI: 10.1016/j.chemosphere.2021.130610] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 04/06/2021] [Accepted: 04/13/2021] [Indexed: 06/12/2023]
Abstract
Contaminated water with landfill leachate (CWLL) with high salinity and high organic content (total organic carbon (TOC) = 649 mg/L and Chemical Oxygen Demand (COD) = 1175 mg/L) is a toxic and non-biodegradable effluent. The present research aimed to assess the treatment effectiveness of CWLL by electrocoagulation (EC)/oxidant process. The ferrous ions generated during the process were employed as coagulant and catalyst for the activation of different oxidants such as peroxymonosulfate (PMS), peroxydisulfate (PDS), hydrogen peroxide (HP), and percarbonate (PC) to decrease TOC in CWLL. Removal of ammonia, color, phosphorous, and chemical oxygen demand (COD) from CWLL effluent was explored at various processes. EC/HP had the best performance (∼73%) in mineralization of organic pollutants compared to others under the condition of pH 6.8, applied current of 200 mA, oxidant dosage of 6 mM, and time of 80 min. The oxidation priority was to follow this order: EC/HP > EC/PMS > EC/PDS > EC/PC. These processes enhanced the biodegradability of CWLL based on the average oxidation state and biochemical oxygen demand (BOD)/COD ratio. SUVA254 and E2/E3 indices were also investigated on obtained effluents. The phytotoxicity evaluation was carried out based on the germination index, indicating that the electro-activated oxidant was an effective system to reduce the toxicity of polluted waters. EC/HP showed supremacy compared to others in terms of efficiency, cost, and detoxification. Therefore, the electro-activated oxidant system is a good means for removing organic pollutants from real wastewater.
Collapse
Affiliation(s)
- Farshid Ghanbari
- Department of Environmental Health Engineering, Abadan Faculty of Medical Sciences, Abadan, Iran.
| | - Qilin Wang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Aydin Hassani
- Department of Materials Science and Nanotechnology Engineering, Faculty of Engineering, Near East University, 99138, Nicosia, TRNC, Mersin 10, Turkey.
| | - Stanisław Wacławek
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentská 1402/2, 461 17, Liberec 1, Czech Republic
| | - Jorge Rodríguez-Chueca
- Universidad Politécnica de Madrid (UPM), E.T.S. de Ingenieros Industriales, Departamento de Ingeniería Química Industrial y Del Medio Ambiente, C/ de José Gutiérrez Abascal 2, Madrid, 28006, Spain
| | - Kun-Yi Andrew Lin
- Department of Environmental Engineering & Innovation and Development Center of Sustainable Agriculture & Research Center of Sustainable Energy and Nanotechnology, National Chung Hsing University, 250 Kuo-Kuang Road, Taichung, Taiwan.
| |
Collapse
|
3
|
Abstract
Wet air oxidation (WAO) is an attractive technique for sewage sludge treatment. The
WAO process and the factors influencing the process are examined in detail, together with the advantages
and disadvantages. Catalytic wet air oxidation (CWAO) is emphasized because it can lower
operational conditions, and the commonly-used and new homogeneous and heterogeneous catalysts
are introduced. Homogeneous catalysts tend to be more appropriate for the CWAO treatment
of sewage sludge, and Cu-based homogeneous catalysts such as CuSO4 are the most popular for industrial
applications. Heterogeneous catalysts include non-noble metal catalysts, noble metal catalysts,
metal-organic frameworks (MOFs) catalysts, and non-metal catalysts. Non-noble metal catalysts
typically contain hetero-elements as in Mo-based, Ce-based, Cu-based, Fe-based catalysts,
multi-metal supported catalysts, and polyoxometalates catalysts. In general, Mo-based catalysts
and Ce-based catalysts have higher activities than other metal-based catalysts. The commonly-used
noble metal elements are based on Ru, Pt, Pd, Rh, and Ir. The MOF catalysts tend to have high catalytic
activity, and the non-metallic carbon catalysts may be used in environments that would otherwise
be toxic to traditional metal catalysts. To conclude, a summary of the challenges and
prospects of WAO technology in sewage sludge treatment is given.
Collapse
Affiliation(s)
- De-bin Li
- College of Energy, Xiamen University, Xiamen 361102, China
| | - Duo Wang
- College of Energy, Xiamen University, Xiamen 361102, China
| | - Zi-sheng Jiang
- Power China ECO-Environmental Group Co., LTD., Shenzhen 518102, China
| |
Collapse
|
4
|
Díaz AI, Oulego P, González JM, Laca A, Díaz M. Physico-chemical pre-treatments of anaerobic digestion liquor for aerobic treatment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 274:111189. [PMID: 32801104 DOI: 10.1016/j.jenvman.2020.111189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 07/14/2020] [Accepted: 08/01/2020] [Indexed: 06/11/2023]
Abstract
Centrifugation of anaerobically digested sewage sludge gives rise to a solid phase, which could be employed as a fertilizer, and a liquid fraction (ADL), which should be treated before being spilled out. This is not an easy task because this liquor is characterized for presenting high COD (~16000 mg O2/L), high ammonium content (~4000 mg/L) and low biodegradability (BOD5/COD ~0.2). With the objective to pre-treat this aqueous waste before its treatment by means of more traditional aerobic processes, different physico-chemical methods (ultrasound, ozonation, hydrolysis and wet air oxidation) were assessed in this work. Ultrasound and thermal hydrolysis gave solubilizations around 47% and 68% respectively. The best results in terms of total COD removal were obtained when wet air oxidation (8 h, 160 C-200 °C and 6.0 MPa) and ozonation (8 h, 25 °C, 12 g/h O3) techniques were employed achieving COD degradations of 71% and 38%, respectively. The pre-treatment of ADL with the four assayed techniques improved considerably the biodegradability (BOD5/COD) of the effluent, with values around 0.3-0.4, depending on the treatment. The experimental data were successfully fitted by kinetic models and the kinetic constants for the solubilization and degradation steps were obtained. Application of the proposed models can be of interest for the optimization and selection of the most suitable techniques and operational conditions, in each particular case.
Collapse
Affiliation(s)
- Ana Isabel Díaz
- Department of Chemical and Environmental Engineering. University of Oviedo. C/Julián Clavería, s/n, E-33006, Oviedo, Asturias, Spain
| | - Paula Oulego
- Department of Chemical and Environmental Engineering. University of Oviedo. C/Julián Clavería, s/n, E-33006, Oviedo, Asturias, Spain
| | - J Manuel González
- R&D, COGERSA SAU. C/ La Zoreda, s/n, E-33697, Gijón, Asturias, Spain
| | - Adriana Laca
- Department of Chemical and Environmental Engineering. University of Oviedo. C/Julián Clavería, s/n, E-33006, Oviedo, Asturias, Spain.
| | - Mario Díaz
- Department of Chemical and Environmental Engineering. University of Oviedo. C/Julián Clavería, s/n, E-33006, Oviedo, Asturias, Spain
| |
Collapse
|
5
|
Chen Y, Xu L, Tan SN, Sun X, Deng Y, Yang W. Solidification and multi-cytotoxicity evaluation of thermally treated MSWI fly ash. JOURNAL OF HAZARDOUS MATERIALS 2020; 388:122041. [PMID: 31954298 DOI: 10.1016/j.jhazmat.2020.122041] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 01/04/2020] [Accepted: 01/06/2020] [Indexed: 06/10/2023]
Abstract
Municipal solid waste incineration (MSWI) fly ash produced in waste-to-energy plants possesses a serious threat to human health. Although the traditional methods including toxicity characteristic leaching procedure and sequential extraction approach can partially evaluate the reduction of heavy metals leaching from thermally treated MSWI fly ash, the potential threat towards organisms is frequently ignored in previous literature. Considering this, herein we systematically assess the cytotoxicity of heat-treated samples using multiple cells from different biological tissues/organs for the first time. The results indicate that the leachability and transferability of heavy metals are declined after treatment. The biological assays demonstrate that the leachates from the treated residues induce lower phytotoxicity and cytotoxicity compared with the original samples. Moreover, according to the cellular responses of multiple cells to the leachates, normal cells (MC3T3-E1, HUVEC, and L929) are more tolerant to the leachates than cancerous cells (4T1, MG63), and the skin fibroblasts (L929), which often interact with the external circumstance, have the best cellular tolerance. This work provides a novel platform to determine the potential biosecurity of MSWI fly ash-derived products towards organisms, when they are served as secondary building materials in the constructional industry that may be contact with animals and human beings.
Collapse
Affiliation(s)
- Yong Chen
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610064, China
| | - Li Xu
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610064, China
| | - Swee Ngin Tan
- National Institute of Education, Nanyang Technological University, Singapore, 637616, Singapore
| | - Xiaolong Sun
- National Institute of Education, Nanyang Technological University, Singapore, 637616, Singapore; Zerowaste Asia Co. Ltd., Singapore, 637616, Singapore
| | - Yi Deng
- School of Chemical Engineering, Sichuan University, Chengdu, 610064, China; State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China; Department of Mechanical Engineering, The University of Hong Kong, Hong Kong Special Administrative Region.
| | - Weizhong Yang
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610064, China.
| |
Collapse
|
6
|
Zhang L, Liu H, Wang Y, Peng Y. Compositional characteristics of dissolved organic matter during coal liquefaction wastewater treatment and its environmental implications. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 704:135409. [PMID: 31791753 DOI: 10.1016/j.scitotenv.2019.135409] [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: 09/23/2019] [Revised: 11/01/2019] [Accepted: 11/05/2019] [Indexed: 06/10/2023]
Abstract
The variations in the structural components of dissolved organic matter (DOM) during coal liquefaction wastewater (CLW) treatment are still unclear at present, limiting the further improvement and application of CLW treatment processes. In this study, the changes of DOM composition during air flotation, catalytic oxidation, biofiltration, ozonation, anoxic/oxic (A/O), and membrane bioreactor (MBR) which were applied in the full-scale CLW treatment, were investigated by three-dimensional excitation-emission matrix fluorescence and ultraviolet-visible spectroscopy. The dissolved organic carbon and chemical oxygen demand of the raw CLW reached 1965.2 mg/L and 5310.0 mg/L, respectively, with humic acid-like substances being as the dominant component (63.1%), and protein-like substances contributing a small amount (5.3%). Air flotation could treat humic acid-like substances more effectively. Catalytic oxidation and ozonation efficiently removed macromolecular aromatic substances with aliphatic chain substituents, resulting in the notable enhancement of the biodegradability of the organics. The DOM removal efficiency of biofiltration and A/O reached 86.0% and 92.3%, respectively, and simultaneously complex macromolecular substances with a high degree of aromaticity were formed. This study could provide a theoretical basis for optimizing the technical parameters and further improving the treatment efficiency of CLW.
Collapse
Affiliation(s)
- Li Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China.
| | - Han Liu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
| | - Yifei Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
| |
Collapse
|
7
|
Chen W, Zhang A, Jiang G, Li Q. Transformation and degradation mechanism of landfill leachates in a combined process of SAARB and ozonation. WASTE MANAGEMENT (NEW YORK, N.Y.) 2019; 85:283-294. [PMID: 30803582 DOI: 10.1016/j.wasman.2018.12.038] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 12/24/2018] [Accepted: 12/27/2018] [Indexed: 06/09/2023]
Abstract
Dissolved organic matter (DOM) in mature landfill leachate is significantly different from that in young landfill leachate; the composition of DOM greatly influences both biological treatment and advanced treatment processes. In the present study, the transformation and degradation mechanisms of landfill leachates in a combined semi-aerobic aged refuse biofilter (SAARB) and ozonation process was investigated using organic removal analysis, molecular weight distribution (MWD), 3D-EEM-PARAFAC analysis, UV-Vis spectroscopy, and linear regression. Results revealed that the DOM in mature landfill leachate contained a greater amount of aromatic substances and had higher molecular weight than DOM in young landfill leachate. After the SAARB process, humus contained in the SAARB was discharged with effluent from both mature and young landfill leachate. Due to the differences in composition and structure of organic matter, the COD removal efficiency (17.89%) of SAARB effluent from treating mature landfill leachate (mature SAARB effluent) was much lower than that (45.91%) of SAARB effluent from treating young landfill leachate (young SAARB effluent) under the same operational parameters of the ozonation process. As indicated by PARAFAC analysis, better chemical stability of DOM in mature SAARB effluent resulted in inferior ozone treatment efficiency. Furthermore, the hydrophobicity and the concentration of benzene ring compounds in the mature and young SAARB effluent were reduced significantly by the ozonation process. Therefore, great improvements in the biodegradability of SAARB effluents were achieved in the ozonation process. Overall, the results of this study provide suggestions and guidance for practical applications of these technologies.
Collapse
Affiliation(s)
- Weiming Chen
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, PR China
| | - Aiping Zhang
- Key Laboratory of Special Waste Water Treatment, Sichuan Province Higher Education System, College of Chemistry and Material Science, Sichuan Normal University, Chengdu 610068, PR China
| | - Guobin Jiang
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, PR China
| | - Qibin Li
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, PR China.
| |
Collapse
|
8
|
Kurian M, Remya V, Kunjachan C. Catalytic wet oxidation of chlorinated organics at mild conditions over iron doped nanoceria. CATAL COMMUN 2017. [DOI: 10.1016/j.catcom.2017.05.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
|
9
|
Oulego P, Collado S, Laca A, Díaz M. Impact of leachate composition on the advanced oxidation treatment. WATER RESEARCH 2016; 88:389-402. [PMID: 26517790 DOI: 10.1016/j.watres.2015.09.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 09/22/2015] [Accepted: 09/28/2015] [Indexed: 06/05/2023]
Abstract
Advanced oxidation processes (AOPs) are gaining importance as an alternative to the biological or physicochemical treatments for the management of leachates. In this work, it has been studied the effect of the characteristics of the leachate (content in humic acids, landfill age and degree of stabilization) on the wet oxidation process and final quality of the treated effluent. A high concentration of humic acids in the leachate had a positive effect on the COD removal because this fraction is more easily oxidizable. Additionally, it has been demonstrated that the simultaneous presence of humic acid and the intermediates generated during the oxidation process improved the degradation of this acid, since such intermediates are stronger initiators of free radicals than the humic acid itself. Similar values of COD removals (49% and 51%) and biodegradability indices (0.30 and 0.35) were observed, after 8 h of wet oxidation, for the stabilised leachate (biologically pretreated) and the raw one, respectively. Nevertheless, final colour removal was much higher for the stabilised leachate, achieving values up to 91%, whereas for the raw one only 56% removal was attained for the same reaction time. Besides, wet oxidation treatment was more efficient for the young leachate than for the old one, with final COD conversions of 60% and 37%, respectively. Eventually, a triangular "three-lump" kinetic model, which considered direct oxidation to CO2 and partial oxidation through intermediate compounds, was here proposed.
Collapse
Affiliation(s)
- Paula Oulego
- Department of Chemical and Environmental Engineering, University of Oviedo, c/ Julián Clavería s/n, E-33071, Oviedo, Spain
| | - Sergio Collado
- Department of Chemical and Environmental Engineering, University of Oviedo, c/ Julián Clavería s/n, E-33071, Oviedo, Spain
| | - Adriana Laca
- Department of Chemical and Environmental Engineering, University of Oviedo, c/ Julián Clavería s/n, E-33071, Oviedo, Spain
| | - Mario Díaz
- Department of Chemical and Environmental Engineering, University of Oviedo, c/ Julián Clavería s/n, E-33071, Oviedo, Spain.
| |
Collapse
|
10
|
Galeano LA, Vicente MÁ, Gil A. Catalytic Degradation of Organic Pollutants in Aqueous Streams by Mixed Al/M-Pillared Clays (M = Fe, Cu, Mn). CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2014. [DOI: 10.1080/01614940.2014.904182] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|