Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1039/c9ew00351g |
| Impacts of antiscalants on the formation of calcium solids: implication on scaling potential of desalination concentrate | |
| Jain, Tushar1; Sanchez, Edgar1; Owens-Bennett, Emily2; Trussell, Rhodes2; Walker, Sharon1; Liu, Haizhou1 | |
| 通讯作者 | Liu, Haizhou |
| 来源期刊 | ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
 |
| ISSN | 2053-1400 |
| EISSN | 2053-1419 |
| 出版年 | 2019 |
| 卷号 | 5期号:7页码:1285-1294 |
| 英文摘要 | Brackish water desalination has become increasingly important in arid inland regions for reliable water supplies, but the management of desalination brine waste is costly. In particular, the presence of oversaturated calcium as scale-forming compounds in the brine is challenging to disposal. This study investigated the effects of three widely used antiscalants, i.e., nitrilotri-methylenephosphonic acid (NTMP), ethylenediaminetetra-methylenephosphonic acid (EDTMP) and diethylenetriaminepentakis-methylphosphonic acid (DTPMP) on the precipitation of calcium from solutions under chemical conditions relevant to brackish desalination brine, with an emphasis on the nucleation and precipitation of three calcium-containing solids including hydroxyapatite Ca-5(PO4)(3)OH(s), gypsum CaSO4(s), and vaterite CaCO3(s). The nucleation rates and activation energy of nucleation were investigated for the first time for hydroxyapatite relevant to a desalination concentrate. Results showed that all three antiscalants exhibited uniquely time-dependent effects on the inhibition of calcium solid formation. The precipitation kinetics exhibited a three-phase behavior, with an induction phase, a rapid reaction phase, and a final equilibrium phase. The effectiveness of antiscalant in delaying calcium precipitation and slowing down the rate of precipitation followed the order of DTPMP > EDTMP > NTMP. Antiscalants adsorb on the nuclei of calcium solids and inhibit the crystal growth process. Activation energy of nucleation increased linearly with antiscalant dosage, but it decreased as the regime changed from homogeneous to heterogeneous nucleation. This study generated vital information on the precipitation kinetics of calcium solids in the presence of phosphonate-containing antiscalants and advances the development of desalination brine management strategies. |
| 类型 | Article |
| 语种 | 英语 |
| 国家 | USA |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000473057800008 |
| WOS关键词 | REVERSE-OSMOSIS ; BRACKISH-WATER ; WASTE-WATER ; HETEROGENEOUS NUCLEATION ; SULFATE DIHYDRATE ; GYPSUM ; CRYSTALLIZATION ; MEMBRANES ; KINETICS ; PRECIPITATION |
| WOS类目 | Engineering, Environmental ; Environmental Sciences ; Water Resources |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology ; Water Resources |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/215552 |
| 作者单位 | 1.Univ Calif Riverside, Dept Chem & Environm Engn, Riverside, CA 92521 USA; 2.Trussell Technol Inc, Pasadena, CA 91101 USA |
| 推荐引用方式 GB/T 7714 | Jain, Tushar,Sanchez, Edgar,Owens-Bennett, Emily,et al. Impacts of antiscalants on the formation of calcium solids: implication on scaling potential of desalination concentrate[J],2019,5(7):1285-1294. |
| APA | Jain, Tushar,Sanchez, Edgar,Owens-Bennett, Emily,Trussell, Rhodes,Walker, Sharon,&Liu, Haizhou.(2019).Impacts of antiscalants on the formation of calcium solids: implication on scaling potential of desalination concentrate.ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY,5(7),1285-1294. |
| MLA | Jain, Tushar,et al."Impacts of antiscalants on the formation of calcium solids: implication on scaling potential of desalination concentrate".ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY 5.7(2019):1285-1294. |
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