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Aziz A, Agamuthu P, Fauziah SH. Effective removal of p-tert-Butylphenol and Pyridine, 3-(1-methyl-2-pyrrolidinyl)-, (S)- from landfill leachate using locust bean gum. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2018; 36:1146-1156. [PMID: 30067147 DOI: 10.1177/0734242x18789062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The widespread distribution of persistent organic pollutants (POPs) in landfill leachate is problematic due to their acute toxicity, carcinogenicity and genotoxicity effects, which could be detrimental to public health and ecological systems. The objective of this study was to evaluate the effective removal of POPs - namely, p-tert-Butylphenol and Pyridine, 3-(1-methyl-2-pyrrolidinyl)-, (S)- - from landfill leachate using locust bean gum (LBG), and in comparison with commonly used alum. The response surface methodology coupled with a Box-Behnken design was employed to optimize the operating factors for optimal POPs removal. A quadratic polynomial model was fitted into the data with the R2 values of 0.97 and 0.96 for the removal of p-tert-Butylphenol and Pyridine, 3-(1-methyl-2-pyrrolidinyl), (S)-, respectively. The physicochemical characteristics of the flocs produced by LBG and alum were evaluated with Fourier Transform Infrared (FTIR) spectroscopy and Scanning Electron Microscopy (SEM). The infrared spectra of LBG-treated floc were identical with LBG powder, but there was some variation in the peaks of the functional groups, signifying the chemical interactions between flocculants and pollutant particles resulting from POPs removal. The results showed that p-tert-Butylphenol and Pyridine, 3-(1-methyl-2-pyrrolidinyl)-, (S)- obtained 96% and 100% removal using 500 mg/L of LBG at pH 4. pH have a significant effect on POPs removal in leachate. It is estimated that treating one million gallons of leachate using alum (at 1 g/L dosage) would cost US$39, and using LBG (at 500 mg/L dosage) would cost US$2. LBG is eco-friendly, biodegradable and non-toxic and, hence, strongly recommended as an alternative to inorganic coagulants for the treatment of POPs in landfill leachate.
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Affiliation(s)
- A Aziz
- 1 Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
- 2 Faculty of Marine Sciences, Lasbela University of Agriculture, Water and Marine Sciences, Uthal, Pakistan
- 3 Center for Research in Waste Management, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - P Agamuthu
- 1 Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
- 3 Center for Research in Waste Management, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - S H Fauziah
- 1 Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
- 3 Center for Research in Waste Management, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
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Yuan SF, Liu ZH, Lian HX, Yang C, Lin Q, Yin H, Dang Z. Simultaneous determination of estrogenic odorant alkylphenols, chlorophenols, and their derivatives in water using online headspace solid phase microextraction coupled with gas chromatography-mass spectrometry. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:19116-25. [PMID: 27344655 DOI: 10.1007/s11356-016-7107-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 06/16/2016] [Indexed: 05/20/2023]
Abstract
A simple online headspace solid-phase microextraction (HS-SPME) coupled with the gas chromatography-mass spectrometry (GC-MS) method was developed for simultaneous determination of trace amounts of nine estrogenic odorant alkylphenols and chlorophenols and their derivatives in water samples. The extraction conditions of HS-SPME were optimized including fiber selection, extraction temperature, extraction time, and salt concentration. Results showed that divinylbenzene/Carboxen/polydimethylsiloxane (DVB/CAR/PDMS) fiber was the most appropriate one among the three selected commercial fibers, and the optimal extraction temperature, time, and salt concentration were 70 °C, 30 min, and 0.25 g/mL, respectively. The developed method was validated and showed good linearity (R (2) > 0.989), low limit of detection (LOD, 0.002-0.5 μg/L), and excellent recoveries (76-126 %) with low relative standard deviation (RSD, 0.7-12.9 %). The developed method was finally applied to two surface water samples and some of these target compounds were detected. All these detected compounds were below their odor thresholds, except for 2,4,6-TCAS and 2,4,6-TBAS wherein their concentrations were near their odor thresholds. However, in the two surface water samples, these detected compounds contributed to a certain amount of estrogenicity, which seemed to suggest that more attention should be paid to the issue of estrogenicity rather than to the odor problem.
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Affiliation(s)
- Su-Fen Yuan
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, Guangdong, China
| | - Ze-Hua Liu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, Guangdong, China.
- Key Lab Pollution Control and Ecosystem Restoration in Industry Cluster, Ministry of Education, Guangzhou, 510006, Guangdong, China.
- Guangdong Environmental Protection Key Laboratory of Solid Waste Treatment and Recycling, Guangzhou, 510006, Guangdong, China.
| | - Hai-Xian Lian
- Center of Water Environment Monitoring, Guangdong Yue Gang Water Supply Co. LTD, Shenzhen, 518021, Guangdong, China
- Department of Water Technology Research and Development, Guangdong GDH Water Co., LTD, Shenzhen, 518021, Guangdong, China
| | - Chuangtao Yang
- Center of Water Environment Monitoring, Guangdong Yue Gang Water Supply Co. LTD, Shenzhen, 518021, Guangdong, China
- Department of Water Technology Research and Development, Guangdong GDH Water Co., LTD, Shenzhen, 518021, Guangdong, China
| | - Qing Lin
- Center of Water Environment Monitoring, Guangdong Yue Gang Water Supply Co. LTD, Shenzhen, 518021, Guangdong, China
- Department of Water Technology Research and Development, Guangdong GDH Water Co., LTD, Shenzhen, 518021, Guangdong, China
| | - Hua Yin
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, Guangdong, China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, Guangdong, China
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