1
|
Verma V, Ghosh P, Singh SB, Gupta V, Chaudhari PK. Kinetics of catalytic treatment of coking wastewater (COD, phenol and cyanide) using wet air oxidation. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2021. [DOI: 10.1515/ijcre-2021-0164] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Coking wastewater (CWW) is known as a highly polluting effluent. This study deals with the degradation of pollutants in terms of COD, phenol and cyanide present in CWW using catalytic wet air oxidation (CWAO) process. CWAO was carried out in batch mode using various catalysts. The investigated operating parameters are initial pH (pH
i
) 3–11, temperature (T) 100–160 °C, air partial pressure (p
air) 2–6 MPa, catalyst mass loading (C
w
) 2–5 g/L and treatment time (t
R
) of 0–6 h. Among various catalysts, the copper chloride was proved to be best for degradation of pollutants. The optimum conditions were evaluated for the degradation of organic compounds as T 130 °C, p
air 8.8 MPa, C
w
3 g/L and t
R
= 6 h. The maximum percentage reduction of COD, phenol, and cyanide was achieved through experiment at T 160 °C, p
air 12.2 MPa, C
w
5 g/L and t
R
6 h as 97.32%, 97.94% and 99.87%, respectively. The kinetics studies were also performed to evaluate the rate constant (k), and reaction order with respect to COD, phenol, CN, CW and p
air.
Collapse
Affiliation(s)
- Vibha Verma
- Department of Chemical Engineering , National Institute of Technology , Raipur 492010 , India
| | - Prabir Ghosh
- Department of Chemical Engineering , National Institute of Technology , Raipur 492010 , India
| | | | - Vandana Gupta
- Department of Chemical Engineering , National Institute of Technology , Raipur 492010 , India
| | - Parmesh Kumar Chaudhari
- Department of Chemical Engineering , National Institute of Technology , Raipur 492010 , India
| |
Collapse
|
2
|
Abstract
Power production from coal combustion is one of two major anthropogenic sources of mercury emission to the atmosphere. The aim of this study is the analysis of the carbon footprint of mercury removal technologies through sorbents injection related to the removal of 1 kg of mercury from flue gases. Two sorbents, i.e., powdered activated carbon and the coke dust, were analysed. The assessment included both direct and indirect emissions related to various energy and material needs life cycle including coal mining and transport, sorbents production, transport of sorbents to the power plants, and injection into flue gases. The results show that at the average mercury concentration in processed flue gasses accounting to 28.0 µg Hg/Nm3, removal of 1 kg of mercury from flue gases required 14.925 Mg of powdered activated carbon and 33.594 Mg of coke dust, respectively. However, the whole life cycle carbon footprint for powdered activated carbon amounted to 89.548 Mg CO2-e·kg−1 Hg, whereas for coke dust this value was around three times lower and amounted to 24.452 Mg CO2-e·kg−1 Hg. Considering the relatively low price of coke dust and its lower impact on GHG emissions, it can be found as a promising alternative to commercial powdered activated carbon.
Collapse
|
3
|
Guo J, Li Y, Xiong J, Zhu T. Coupling mechanism of activated carbon mixed with dust for flue gas desulfurization and denitrification. J Environ Sci (China) 2020; 98:205-214. [PMID: 33097153 DOI: 10.1016/j.jes.2020.06.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/28/2020] [Accepted: 06/01/2020] [Indexed: 06/11/2023]
Abstract
To clarify the effect of coking dust, sintering dust and fly ash on the activity of activated carbon for various industrial flue gas desulfurization and denitrification, the coupling mechanism of the mixed activated carbon and dust was investigated to provide theoretical reference for the stable operation. The results show that coking dust had 34% desulfurization efficiency and 10% denitrification efficiency; correspondingly, sintering dust and fly ash had no obvious desulfurization and denitrification activities. For the mixture of activated carbon and dust, the coking dust reduced the desulfurization and denitrification efficiencies by blocking the pores of activated carbon, and its inhibiting effect on activated carbon was larger than its own desulfurization and denitrification activity. The sintering dust also reduced the desulfurization efficiency on the activated carbon while enhancing the denitrification efficiency. Fly ash blocked the pores of activated carbon and reduced its reaction activity. The reaction activity of coking dust mainly came from the surface functional groups, similar to that of activated carbon. The reaction activity of sintering dust mainly came from the oxidative property of Fe2O3, which oxidized NO to NO2 and promoted the fast selectively catalytic reduction (SCR) of NO to form N2. Sintering dust was activated by the joint action of activated carbon, and both had a coupling function. Sintering dust enhanced the adsorption and oxidation of NO, and activated carbon further promoted the reduction of NOx by NH3; thus, the denitrification efficiency increased by 5%-7% on the activated carbon.
Collapse
Affiliation(s)
- Junxiang Guo
- Beijing Engineering Research Center of Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Yuran Li
- Beijing Engineering Research Center of Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
| | - Jin Xiong
- Beijing Engineering Research Center of Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Tingyu Zhu
- Beijing Engineering Research Center of Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
| |
Collapse
|
4
|
Saber AN, Zhang H, Cervantes-Avilés P, Islam A, Gao Y, An W, Yang M. Emerging concerns of VOCs and SVOCs in coking wastewater treatment processes: Distribution profile, emission characteristics, and health risk assessment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 265:114960. [PMID: 32593902 DOI: 10.1016/j.envpol.2020.114960] [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: 03/04/2020] [Revised: 05/27/2020] [Accepted: 06/03/2020] [Indexed: 06/11/2023]
Abstract
In this study, the distribution profiles, emission characteristics, and health risks associated with 43 volatile and semi-volatile organic compounds, including 15 phenols, 18 polycyclic aromatic hydrocarbons (PAHs), 6 BTEX, and 4 other compounds, were determined in the wastewater treatment plant (WWTP) of a coking factory (plant C) and the succeeding final WWTP (central WWTP). Total phenols with a concentration of 361,000 μg L-1 were the predominant compounds in the influent wastewater of plant C, whereas PAHs were the major compounds in the final effluents of both coking WWTPs (84.4 μg L-1 and 30.7 μg L-1, respectively). The biological treatment process in plant C removed the majority of volatile organic pollutants (94.1%-99.9%). A mass balance analysis for plant C showed that biodegradation was the main removal pathway for all the target compounds (56.6%-99.9%) except BTEX, chlorinated phenols, and high molecular weight (MW) PAHs. Chlorinated phenols and high MW PAHs were mainly removed via sorption to activated sludge (51.8%-73.2% and 60.2%-75.9%, respectively). Air stripping and volatilization were the dominant mechanisms for removing the BTEX compounds (59.8%-73.8%). The total emission rates of the detected volatile pollutants from plant C and the central WWTP were 1,640 g d-1 and 784 g d-1, respectively. Benzene from the equalization basins of plant C and the central WWTP corresponded to the highest inhalation carcinogenic risks (1.4 × 10-3 and 3.2 × 10-4, respectively), which exceeded the acceptable level for human health (1 × 10-6) recommended by the United States Environmental Protection Agency. The results showed that BaP exhibited the highest inhalation non-cancer risk, with a hazard index ratio of 70 and 30 for plant C and the central WWTP, respectively. Moreover, the excess sludge generated during wastewater treatment should also be carefully handled because it adsorbed abundant PAHs and chlorinated phenols at coking plant C (58,000 μg g-1 and 3,500 μg g-1) and the central WWTP (622 μg g-1 and 54 μg g-1).
Collapse
Affiliation(s)
- Ayman N Saber
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Pesticide Residues and Environmental Pollution Department, Central Agricultural Pesticide Laboratory, Agricultural Research Center, Dokki, Giza, 12618, Egypt.
| | - Haifeng Zhang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Pabel Cervantes-Avilés
- Tecnologico de Monterrey, Escuela de Ingenieríay Ciencias, Campus Puebla, Vía Atlixcáyotl 5718, Reserva Territorial Atlixcáyotl, CP 72453, Puebla, Pue, Mexico
| | - Ashraful Islam
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yingxin Gao
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wei An
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Min Yang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| |
Collapse
|
5
|
Verma V, Chaudhari PK, Mazumdar B. Optimization of multiple parameters of coking wastewater (CWW): catalytic thermolysis (CT) at high pressure reactor (HPR). INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2020. [DOI: 10.1515/ijcre-2019-0221] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractPresent study deals with the treatment of coking waste water (CWW) for the reduction of pollutants COD, phenol and cyanide using catalytic thermolysis (CT). For screening of catalyst and optimization of pH the CT was performed at 100 °C, pH = 3–11 using catalyst mass loading Cw = 3 g/L. In this study Cu (NO3)2 gave best performance. Further, CT was carried out using Cu (NO3)2 catalyst in high pressure reactor (HPR). The investigated parameters range were initial pH (pHi) = 3–11, Cw = 1–5 g/L, temperature (T) = 100–160 °C and treatment time (tR) = 6 h. The maximum percentage reduction for COD, phenol and cyanide were 83.33, 80.57 and 97.61%, respectively at pH = 9, Cw = 4 g/L, T = 140 °C and tR = 6 h. The CT did not give complete reduction of pollutant; therefore it was further treated using adsorption process as second stage treatment. The initial value of COD = 610 mg/L, phenol = 70.58 mg/L and cyanide = 0.45 mg/L were further reduced to 98.85, 100.00 and 55.55%, respectively, when adsorption process was performed at pH = 9, adsorbents dose Aw = 4 g/L, tR = 2 h. The response surface methodology (RSM) was performed through central composite design (CCD) for the designing of experiments and optimization of both the process. The kinetics studies of CT at HPR showed first order with respect to COD and phenol, and 0.24–0.608 order with respect to CW.
Collapse
Affiliation(s)
- Vibha Verma
- Department of Chemical Engineering, National Institute of Technology, 492010, Raipur, India
| | | | - Bidyut Mazumdar
- Department of Chemical Engineering, National Institute of Technology, 492010, Raipur, India
| |
Collapse
|
6
|
Optimization of multiple parameters for treatment of coking wastewater using Fenton oxidation. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.02.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
7
|
Das S, Biswas P, Sarkar S. Tertiary treatment of coke plant effluent by indigenous material from an integrated steel plant: a sustainable approach. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:7379-7387. [PMID: 31884536 DOI: 10.1007/s11356-019-07309-x] [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: 08/08/2019] [Accepted: 12/05/2019] [Indexed: 06/10/2023]
Abstract
Biological process is an important and integral part of the coke plant wastewater treatment. Increasing pressure to meet more stringent discharge limits has led to adopt tertiary treatment for biologically treated coke plant (BTCP) effluent which contains intense colour along with many residual toxic pollutants like phenol, cyanide, thio-cyanate and COD. A sustainable process has been developed to remove these pollutants from BTCP effluent by using an indigenous material coke breeze which is abundantly available in integrated steel plant. Based on the developed process, a full-scale (200 m3/h) treatment plant has been designed for installation. The designed data has been obtained from a continuous demo plant treating 10 m3/h BTCP effluents. The utilised coke breeze is entirely used for sinter making. The process is highly efficient for the removal of colour above 95% and other residual pollutants like phenol, cyanide and COD to a safe level for discharge or reuse. This process neither incurs any additional chemical cost nor generates any secondary pollutants or products. Moreover, the developed process is very sustainable as it has some great advantages like less investment and low maintenance cost; therefore, the method is good in economics. The treated wastewater contains very less amount of chemical residues therefore meets the standards for reuse as industrial water resource. Hence, this developed technology has significant economic, social and environmental benefits. Graphical Abstract .
Collapse
Affiliation(s)
- Suprotim Das
- Environmental Research Group, Tata Steel R&D, Jamshedpur, 831001, India.
| | - Pinakpani Biswas
- Environmental Research Group, Tata Steel R&D, Jamshedpur, 831001, India
| | - Supriya Sarkar
- Environmental Research Group, Tata Steel R&D, Jamshedpur, 831001, India
| |
Collapse
|
8
|
Zhang H, Zhang X, Ding L, Gong M, Su Y, Wang S. Polymerization and oxidation of phenols in supercritical water. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2019; 80:620-633. [PMID: 31661441 DOI: 10.2166/wst.2019.295] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The treatment of toxic and difficult-to-degrade phenolic compounds has become a key issue in the coking, pharmaceutical, and chemical industries. Considering the polymerization and oxidation of phenolic compounds in supercritical water partial oxidation/supercritical water oxidation (SCWPO/SCWO), the present study reviewed the removal efficiency and reaction pathway of phenolic compounds and phenolic waste/wastewater under different reaction conditions. Temperature is the dominant factor affecting the SCWO reaction. When the oxidizing ability is insufficient, the organics polymerize to form phenolic compounds. The gradual increase of oxidant equivalent causes the intermediate product to gradually oxidize to CO2 and H2O completely. Finally, the free radical reaction mechanism is considered to be a typical SCWO reaction mechanism.
Collapse
Affiliation(s)
- Huiwen Zhang
- Anhui University of Technology, Maanshan 243000, China
| | - Xiaoman Zhang
- School of Civil Engineering and Architecture, Anhui University of Technology, Maanshan 243000, China
| | - Lei Ding
- Engineering Research Center of Biomembrane Water Purification and Utilization Technology, 59 Hudong Road, Maanshan 243000, Anhui, Anhui University of Technology, Maanshan 243000, China E-mail:
| | - Miao Gong
- Hefei University of Technology, Hefei 230009, China
| | - Ying Su
- Yancheng Institute of Technology, Yancheng 221051, China
| | | |
Collapse
|
9
|
Saber AN, Zhang H, Yang M. Optimization and validation of headspace solid-phase microextraction method coupled with gas chromatography-triple quadrupole tandem mass spectrometry for simultaneous determination of volatile and semi-volatile organic compounds in coking wastewater treatment plant. ENVIRONMENTAL MONITORING AND ASSESSMENT 2019; 191:411. [PMID: 31165936 DOI: 10.1007/s10661-019-7554-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 05/21/2019] [Indexed: 06/09/2023]
Abstract
Industrial wastewater could be an important source for the emission of volatile (VOCs) and semi-volatile organic compounds (SVOCs), but little is known about it. In this study, a method for the identification and quantitation of 43 VOCs and SVOCs in coking wastewater was developed using a solvent-free equilibrium extraction method on the basis of headspace solid-phase microextraction accompanied by gas chromatography-triple quadrupole tandem mass spectrometry (HS-SPME-GC-MS/MS). To ensure good extraction efficiency, the parameters that have an effect on the HS-SPME-GC-MS/MS process were carefully optimized, in terms of fiber exposure time and temperature, pH, salt additives, sample volume, and desorption time. The HS-SPME method showed good linearity range with coefficients of determination (R2) ≥ 0.991 and achieving a satisfactory recoveries value (70-120%) with good relative standard deviations (RSDs) < 20% (precision). Furthermore, the purposed approach proved to be sensitive with low detection limits, where the values ranged from 0.03 to 3.01 μg/L. The real sample analysis result showed that 43 of VOCs and SVOCs were detected in raw coking wastewater, with 3-cresol as the dominant ones. Further, the method revealed that seven phenols, 11 polycyclic aromatic hydrocarbons, and five BTEX were detected even in the treated effluent. In conclusion, the HS-SPME method developed in this study is simple in sample preparation, convenient, sensitive, and could satisfy the requirement of the analysis of VOCs and SVOCs in coking wastewater.
Collapse
Affiliation(s)
- Ayman N Saber
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- Pesticide Residues and Environmental Pollution Department, Central Agricultural Pesticide Laboratory, Agricultural Research Center, Dokki, Giza, 12618, Egypt
| | - Haifeng Zhang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Min Yang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
| |
Collapse
|
10
|
Gao L, Goldfarb JL. Heterogeneous biochars from agriculture residues and coal fly ash for the removal of heavy metals from coking wastewater. RSC Adv 2019; 9:16018-16027. [PMID: 35521413 PMCID: PMC9064278 DOI: 10.1039/c9ra02459j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 05/15/2019] [Indexed: 12/05/2022] Open
Abstract
While we have started down the path towards a global transition to a green economy, as with most things we began with the "low-hanging fruit," such that increasingly difficult material and chemical conversions remain. Coking is one such example; it is unlikely that steel production will transition away from using coking coal anytime in the near future, such that coking wastewater remains a global environmental challenge. However, we can develop greener methods and materials to treat such waste. The present work demonstrates how wheat straw, an abundant agricultural residue, can be co-pyrolyzed and co-activated with coal fly ash to produce a high surface area biochar. Coal fly ash has previously been shown to promote devolatilization and deoxygenation of pyrolyzed biofuels. This work shows how coal fly ash increases microporosity as well as aromaticity of the surface functional groups, while decreasing carbonyl but preserving or only slightly decreasing ketones and carboxylic acids. CO2-activation of 5 and 10 wt% fly ash with wheat straw blends yields heterogeneous biochars with adsorption capacities upwards of 170 mgmetal gchar -1, with 5 wt% blends showing higher capacity and adsorption uptake rates than the 0 or 10 wt% blends. The adsorption of the four heavy metals ions (Ni2+, Co2+, Zn2+, and Mn2+) was chemical in nature, with cobalt preferentially adsorbing to the char surface. The overall adsorption rate is limited by an initial rapid uptake to fill available surface adsorption sites.
Collapse
Affiliation(s)
- Lihui Gao
- School of Chemical Engineering and Technology, China University of Mining and Technology Xuzhou 221116 People's Republic of China
- Department of Mechanical Engineering, Division of Materials Science and Engineering, Boston University 110 Cummington Mall Boston MA 02215 USA
- The Leone Family Department of Energy & Mineral Engineering, The EMS Energy Institute, The Institutes of Energy and the Environment, The Pennsylvania State University, University Park PA 16802 USA
| | - Jillian L Goldfarb
- Department of Mechanical Engineering, Division of Materials Science and Engineering, Boston University 110 Cummington Mall Boston MA 02215 USA
- The Leone Family Department of Energy & Mineral Engineering, The EMS Energy Institute, The Institutes of Energy and the Environment, The Pennsylvania State University, University Park PA 16802 USA
- Department of Biological and Environmental Engineering, Cornell University 226 Riley-Robb Hall Ithaca NY 14853 USA
| |
Collapse
|
11
|
Wang Y, Liu J, Chen C, Cheng J. Slurryability and combustion characteristics of coal‐coking wastewater‐slurry. CAN J CHEM ENG 2019. [DOI: 10.1002/cjce.23423] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yi Wang
- State Key Laboratory of Clean Energy UtilizationZhejiang UniversityHangzhouZhejiangChina
| | - Jian‐Zhong Liu
- State Key Laboratory of Clean Energy UtilizationZhejiang UniversityHangzhouZhejiangChina
| | - Cong Chen
- State Key Laboratory of Clean Energy UtilizationZhejiang UniversityHangzhouZhejiangChina
| | - Jun Cheng
- State Key Laboratory of Clean Energy UtilizationZhejiang UniversityHangzhouZhejiangChina
| |
Collapse
|
12
|
Chen CY, Chang YH. Engineering strategies for enhancing C. vulgaris ESP-31 lipid production using effluents of coke-making wastewater. J Biosci Bioeng 2018; 125:710-716. [DOI: 10.1016/j.jbiosc.2018.01.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 01/06/2018] [Accepted: 01/10/2018] [Indexed: 12/15/2022]
|
13
|
Górecki J, Burmistrz P, Trzaskowska M, Sołtys B, Gołaś J. Method development and validation for total mercury determination in coke oven gas combining a trap sampling method with CVAAS detection. Talanta 2018; 188:293-298. [PMID: 30029379 DOI: 10.1016/j.talanta.2018.05.098] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 05/27/2018] [Accepted: 05/30/2018] [Indexed: 11/17/2022]
Abstract
Coke oven gas is one of the by-products of the coal coking process. It is used as a fuel in the coking plant, but also as a raw material in the chemical industry to produce methanol, syngas or environment-friendly, low-CO2 hydrogen fuel. Due to the reasons mentioned above, the knowledge of coke oven gas pollutants such as mercury is a key issue. To determine the mercury in the cleaned coke oven gas a trap sampling method combined with CVAAS mercury detection was developed, optimized and validated. In order to perform the sampling process the traps filled with activated carbon were used. The determination of mercury in the traps material was performed by means of an MA-2 mercury analyzer. During the optimization of the method one selected the trap material, sample volume and flow rate. The optimal volume of the coke oven gas sample was 3 dm3 and the flow rate was 18 dm3/h (per one trap). The developed method was validated according to the Eurachem recommendation and was applied to determine mercury in the clean coke oven gas. The coke oven gas sampling was performed in a coking plant in Poland. The average concentration of mercury in the clean coke oven gas was 3.2 ± 0.3 μg/m3N (k = 2) for n = 18.
Collapse
Affiliation(s)
- Jerzy Górecki
- Department of Coal Chemistry and Environmental Sciences, AGH - University of Science and Technology in Kraków, al. A. Mickiewicza 30, 30-059 Kraków, Poland.
| | - Piotr Burmistrz
- Department of Fuel Technology, Faculty of Energy and Fuels, AGH - University of Science and Technology in Kraków, al. A. Mickiewicza 30, 30-059 Kraków, Poland
| | - Marlena Trzaskowska
- Department of Coal Chemistry and Environmental Sciences, AGH - University of Science and Technology in Kraków, al. A. Mickiewicza 30, 30-059 Kraków, Poland
| | - Barbara Sołtys
- Department of Coal Chemistry and Environmental Sciences, AGH - University of Science and Technology in Kraków, al. A. Mickiewicza 30, 30-059 Kraków, Poland
| | - Janusz Gołaś
- Department of Coal Chemistry and Environmental Sciences, AGH - University of Science and Technology in Kraków, al. A. Mickiewicza 30, 30-059 Kraków, Poland
| |
Collapse
|
14
|
Ahmad M, Liu S, Mahmood N, Mahmood A, Ali M, Zheng M, Ni J. Synergic Adsorption-Biodegradation by an Advanced Carrier for Enhanced Removal of High-Strength Nitrogen and Refractory Organics. ACS APPLIED MATERIALS & INTERFACES 2017; 9:13188-13200. [PMID: 28351130 DOI: 10.1021/acsami.7b01251] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Coking wastewater contains not only high-strength nitrogen but also toxic biorefractory organics. This study presents simultaneous removal of high-strength quinoline, carbon, and ammonium in coking wastewater by immobilized bacterial communities composed of a heterotrophic strain Pseudomonas sp. QG6 (hereafter referred as QG6), ammonia-oxidizing bacteria (AOB), and anaerobic ammonium oxidation bacteria (anammox). The bacterial immobilization was implemented with the help of a self-designed porous cubic carrier that created structured microenvironments including an inner layer adapted for anaerobic bacteria, a middle layer suitable for coaggregation of certain aerobic and anaerobic bacteria, and an outer layer for heterotrophic bacteria. By coating functional polyurethane foam (FPUF) with iron oxide nanoparticles (IONPs), the biocarrier (IONPs-FPUF) could provide a good outer-layer barrier for absorption and selective treatment of aromatic compounds by QG6, offer a conducive environment for anammox in the inner layer, and provide a mutualistic environment for AOB in the middle layer. Consequently, simultaneous nitrification and denitrification were reached with the significant removal of up to 322 mg L-1 (98%) NH4, 311 mg L-1 (99%) NO2, and 633 mg L-1 (97%) total nitrogen (8 mg L-1 averaged NO3 concentration was recorded in the effluent), accompanied by an efficient removal of chemical oxygen demand by 3286 mg L-1 (98%) and 350 mg L-1 (100%) quinoline. This study provides an alternative way to promote synergic adsorption and biodegradation with the help of a modified biocarrier that has great potential for treatment of wastewater containing high-strength carbon, toxic organic pollutants, and nitrogen.
Collapse
Affiliation(s)
- Muhammad Ahmad
- Department of Environmental Engineering, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Peking University , Beijing 100871, China
| | - Sitong Liu
- Department of Environmental Engineering, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Peking University , Beijing 100871, China
| | - Nasir Mahmood
- Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Collaborative Innovative Center of Chemical Science and Engineering (Tianjin), Tianjin University , Tianjin 300072, China
| | - Asif Mahmood
- Department of Physics, South University of Sciences and Technology , Shenzhen 518055, P.R. China
| | - Muhammad Ali
- Water Desalination and Reuse Center (WDRC), Biological and Environmental Science and Engineering (BESE), King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia
| | - Maosheng Zheng
- Resources and Environmental Research Academy, North China Electric Power University , Beijing 102206, China
| | - Jinren Ni
- Department of Environmental Engineering, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Peking University , Beijing 100871, China
| |
Collapse
|
15
|
Gao L, Li S, Wang Y. Effect of different pH coking wastewater on adsorption of coking coal. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2016; 73:582-587. [PMID: 26877041 DOI: 10.2166/wst.2015.528] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
H2SO4 has an effect on the sorption of organic contaminants by coking coal (CC) in wastewater. This paper focused on the effect of pH on the removal of chemical oxygen demand (COD), phenols and ammonia. UV-vis spectra, Fourier transform infrared spectra, zeta potential and Brunauer, Emmett and Teller (BET) analysis were investigated to characterize the changes of CC properties and coking wastewater (CW) at different pH values. The results showed that the COD and phenol removal efficiencies increased with decreasing pH value, while the ammonia removal efficiency was decreased gradually. A new transmittance band in the region of 340-600 cm(-1) was observed in UV-vis spectra of CW in acidic condition. The absolute value of the zeta potential as the solution was gradually increasing with the increasing of pH value. Surface area and total pore volume of CC which was immersed in acidic solutions measured by BET were much higher than that of raw CC. CC has a greater adsorption capacity to organic pollution in the acidic solution mainly by van der Waals forces and hydrogen bonding.
Collapse
Affiliation(s)
- Lihui Gao
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
| | - Shulei Li
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
| | - Yongtian Wang
- Chinese National Engineering Research Center of Coal Preparation and Purification, Xuzhou 221116, Jiangsu, China E-mail:
| |
Collapse
|
16
|
Gao L, Li S, Wang Y, Sun H. Organic pollution removal from coke plant wastewater using coking coal. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2015; 72:158-163. [PMID: 26114284 DOI: 10.2166/wst.2015.197] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Coke plant wastewater (CPW) is an intractable chemical wastewater, and it contains many toxic pollutants. This article presents the results of research on a semi-industrial adsorption method of coking wastewater treatment. As a sorbent, the coking coal (CC) was a dozen times less expensive than active carbon. The treatment was conducted within two scenarios, as follows: (1) adsorption after biological treatment of CPW with CC at 40 g L(-1); the chemical oxygen demand (COD) removal was 75.66%, and the concentration was reduced from 178.99 to 43.56 mg L(-1); (2) given an adsorption by CC of 250 g L(-1) prior to the biological treatment of CPW, the eliminations of COD and phenol were 58.08% and 67.12%, respectively. The CC that adsorbed organic pollution and was returned to the coking system might have no effect on both coke oven gas and coke.
Collapse
Affiliation(s)
- Lihui Gao
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
| | - Shulei Li
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
| | - Yongtian Wang
- Chinese National Engineering Research Center of Coal Preparation and Purification, Xuzhou 221116, Jiangsu, China E-mail:
| | - Hao Sun
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
| |
Collapse
|