期刊
CHINESE JOURNAL OF CHEMISTRY
卷 28, 期 3, 页码 337-343出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cjoc.201090076
关键词
molecular dynamics; phosphonic acid; calcite; scale inhibitor; binding energy; pair correlation function; deformation energy
资金
- National Natural Science Foundation of China [20271025]
- Natural Science Foundation of Shandong Province [L2003B01]
- State Key Laboratory of Crystal Materials (Shandong University)
The interactions between calcite crystal and seven kinds of phosphonic acids, nitrilotris(methylphosphonic acid) (NTMP). nitrilo-methyl-bis(methylphosphonic acid) (NMBMP), N,N-glycine-bis(methylphosphonic acid) (GBMP), 1-hydroxy-1,1-ethylenebis(phosphonic acid) (HEBP), 1-amino-1,1-ethylenebis(phosphonie acid) (AEBP), 1,2-ethyl-enediamine-N,N,N',N'-tetrakis(methylphosphonic acid) (EDATMP), and 1,6-hexylenediamine-N,N,N',N'-tetrakis(methylphosphonic acid) (HDATMP) have been simulated by a molecular dynamics method. The results showed that the binding energy of each scale inhibitor with the (1 (1) over bar0) face of calcite crystal was higher than that with (104) face, which has been approved by the analysis of pair correlation functions. The sequence of scale inhibition efficiencies for phosphonic acids against calcite scale is as follows: EDATMP>HDATMP>HEBP>NTMP> GBMP>HEBP>NMBMP, and the growth inhibition on the (1 (1) over bar0) face of calcite was at the leading status. Phosphonic acids deformed during the binding process, and electrovalent bonds formed between the phosphoryl oxygen atoms in phosphonic acids and the calcium ions on calcite crystal.
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