Contrasting effect of lanthanum hydroxide and lanthanum carbonate treatments on phosphorus mobilization in sediment

2021 ◽  
pp. 132021
Author(s):  
Danhong Wu ◽  
Yanhui Zhan ◽  
Jianwei Lin ◽  
Zhibin Zhang ◽  
Bingjie Xie
2020 ◽  
Vol 20 (10) ◽  
pp. 6555-6560
Author(s):  
Min Jiang ◽  
Hengheng Zheng ◽  
Chengliang Xu ◽  
Ye Wang ◽  
Tingxin Wan

In this study, our aim is to investigate the effect of lanthanum carbonate in chronic treatment renal failure complicated with hyperphosphatemia. Using methods with lanthanum carbonate, hyperphosphatemia, placebos, calcium carbonate, end-stage renal disease as keywords, we searched the Chinese Journal Full-text Database, Chinese sci-tech journal database, Wanfang Data knowledge service platform, web of science, PubMed, and other databases for literature quality; meta analysis was carried out after a subsequent evaluation. The meta analysis results showed a significant difference in the control of the blood phosphorus level between weighted mean difference WMD = −0.60, 95% CI: −0.75~−0.45, lanthanum carbonate and placebo; WMD = −0.01, 95% CI: −0.07~−0.05; the lanthanum carbonate and placebo had no significant difference in the control of the blood calcium levels after treatment; WMD = −29.75, 95% CI: −39.22 for the control of blood PIH level after treatment, indicating that the difference between lanthanum carbonate and placebo in the control of the parathyroid hormone (PTH) level was statistically significant. WMD=0.41, 95% CI: −0.48~0.34; the difference between the lanthanum carbonate and calcium carbonate in the control of the blood phosphorus level was statistically significant; WMD = 0.19, 95% CI: −0.25~0.13, lanthanum carbonate and calcium carbonate were statistically significant in blood control calcium level; WMD = 174.66, 95% CI: −150.86~150.46, lanthanum carbonate and calcium carbonate were statistically significant in the control of blood PIH level; the difference was statistically significant. Conclusion: Lanthanum carbonate can significantly reduce blood phosphorus and PIH complicated hyperphosphatemia, and has no significant effect on blood calcium, which is superior to calcium carbonate in effectiveness.


1997 ◽  
Vol 35 (7) ◽  
pp. 71-78 ◽  
Author(s):  
Shuzo Tokunaga ◽  
Syed A. Wasay ◽  
Sang-Won Park

A new adsorption process for the removal of As(V) ion from aqueous solutions has been studied using lanthanum hydroxide (LH), lanthanum carbonate (LC) and basic lanthanum carbonate (BLC). These La compounds were effective in removing As ion to decrease the concentration down to < 0.001 mM. Dissolution of these La compounds was measured in the pH range of 2 to 12. The dissolution was appreciable at initial pH <4.3, <4.3 and <4.0 for LH, LC and BLC, respectively. Kinetic study showed that the As removal was a first-order reaction in the neutral pH range and the rate constants were in the order of LH > LC > BLC. The As removal was highly pH-dependent. The optimum pH range was 3-8, 4-7 and 2-4 for LH, LC and BLC, respectively. The following two mechanisms are proposed: (i) adsorption by exchange of CO3 and/or OH group with As ions in the neutral to alkaline pH range where La does not dissolve and (ii) precipitation of insoluble lanthanum arsenate, LaAsO4, in the acid pH range.


2012 ◽  
Vol &NA; (1432) ◽  
pp. 31
Author(s):  
&NA;
Keyword(s):  

2021 ◽  
Vol 1853 (1) ◽  
pp. 265-265
Keyword(s):  

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