Characterization of humic substances isolated from a tropical zone and their role in membrane fouling
文献类型：期刊论文
| 作者 | Hansima, M. A. C. K.; Jayaweera, A. T.; Ketharani, J.; Ritigala, Tharindu; Zheng, Libing ; Samarajeewa, D. R.; Nanayakkara, K. G. N.; Herath, Ajith C.; Makehelwala, Madhubhashini; Jinadasa, K. B. S. N.
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| 刊名 | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
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| 出版日期 | 2022-06 |
| 卷号 | 10期号:3页码:107456 |
| ISSN号 | 2213-2929 |
| 关键词 | DISSOLVED ORGANIC-MATTER X-RAY PHOTOELECTRON PHOTOCATALYTIC DEGRADATION CHEMICAL-CHARACTERIZATION ELECTRODIALYSIS REVERSAL EXCHANGE MEMBRANES WATER-TREATMENT GROUNDWATER ACIDS SPECTROSCOPY |
| 英文摘要 | Humic substances (HS) are heterogeneous organic polymers that show monotonous properties. HS are present at different proportions in the terrestrial environment, and they implicate the performance of water desalination plants. Recently electrodialysis self-reversal (EDR) technology has been used to treat excess salinity, hardness and fluoride in HS rich groundwater in Sri Lanka (similar to 3 mg L-1, dissolved C). Due to the high organic content of HS in groundwater, the EDR ion exchange membranes are prone to fouling. To unravel the fouling mechanisms, humic acid (HA) and fulvic acid (FA) fractions were isolated and fractionated from the groundwater and characterized spectroscopically. All membrane fouling experiments were conducted for HA and FA contaminated water using a lab-scale EDR setup operated under batch mode. Sequential desorption experiments were carried out using distilled water, 2% (w/w) NaCl, and 0.3% (w/w) sodium dodecyl sulfate to probe variations among two fouling mechanisms. Similarities were found in aromatic and aliphatic carbon contents, humification degree, and molecular weight of humic substances. Higher proportions of carboxylic and phenolic groups were found in FA compared to HA. Ester groups in HA facilitate P, S, and Si migration within organic moieties. The molecular environs in the vicinity of carboxyl functional groups led different fouling mechanisms. HA fouling was found irreversible compared to FA fouling. The subtle differences between fouling mechanisms will help implement appropriate pretreatments to ensure the durability of EDR membranes. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47748]  |
| 专题 | 生态环境研究中心_水污染控制实验室 |
| 作者单位 | 1.Chinese Acad Sci, Dept Water Pollut Control Technol, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 2.Univ Peradeniya, Postgrad Inst Sci PGIS, Peradeniya, Sri Lanka 3.Natl Water Supply & Drainage Board, Katugastota 20800, Sri Lanka 4.Univ Peradeniya, Dept Civil Engn, Fac Engn, Peradeniya, Sri Lanka 5.Rajarata Univ Sri Lanka, Fac Sci Appl, Dept Chem Sci, Anuradhapura, Sri Lanka |
| 推荐引用方式 GB/T 7714 | Hansima, M. A. C. K.,Jayaweera, A. T.,Ketharani, J.,et al. Characterization of humic substances isolated from a tropical zone and their role in membrane fouling[J]. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,2022,10(3):107456. |
| APA | Hansima, M. A. C. K..,Jayaweera, A. T..,Ketharani, J..,Ritigala, Tharindu.,Zheng, Libing.,...&Weerasooriya, Rohan.(2022).Characterization of humic substances isolated from a tropical zone and their role in membrane fouling.JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,10(3),107456. |
| MLA | Hansima, M. A. C. K.,et al."Characterization of humic substances isolated from a tropical zone and their role in membrane fouling".JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 10.3(2022):107456. |
入库方式： OAI收割
来源：生态环境研究中心
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