Introducing hydrate aluminum into porous thermally-treated calcium-rich attapulgite to enhance its phosphorus sorption capacity for sediment internal loading management
Introducing hydrate aluminum into porous thermally-treated calcium-rich attapulgite to enhance its phosphorus sorption capacity for sediment internal loading management
复制标题
将水合铝引入多孔热处理富钙凹凸棒石中以增强其对沉积物内部负荷管理的磷吸附能力
DOI：
10.1016/j.cej.2018.05.065
复制
发表时间：
2018-09
期刊：
影响因子：
--
通讯作者：
Wei Li
中科院分区：
文献类型：
--
作者：
Hongbin Yin;Chao Ren;Wei Li
Solid-phase P sorbents are increasingly used in shallow eutrophic lakes for sediment internal loading management due to their strong ability to resist frequent resuspension. In this study, hydrate aluminum was incorporated into porous thermally-treated calcium-rich attapulgite (TCAP) to enhance its P sorption capacity for sediment internal P loading management. Batch studies indicated that 2 mol/L of aluminum modified TCAP (Al@TCAP) has the optimal P sorption performance and was well characterized. The maximum P sorption capacity of Al@TCAP with particle sizes 1–2 mm increased to 8.79 mg P/g at a pH of 7, which was nearly 2 times that of TCAP. P sorption on Al@TCAP performs well when the solution pH is in the range of 4–10, but efficiency decreases sharply when the solution pH exceeds 11. The co-existing ions including SO42−, Cl−, NO3−, and HCO3−that are frequently found in eutrophic lake waters have little effect on P sorption of Al@TCAP. Laboratory experiments showed that adding Al@TCAP does not cause pH changes in overlying water. An average P reduction of 59.7 to 72.5% in overlying water was recorded during the experiment’s 63 days of aerobic and anaerobic incubation. Mobile P in surface sediment (0–2 cm) was significantly reduced and was accompanied by an evident Al-P increase and a moderate Ca-P increase in sediment when compared to the control treatment. This was further confirmed by31P solid-state NMR and XPS spectroscopy analysis, which indicated that P bound by Al@TCAP was mainly through formation of the Al-P complex. All results indicate that Al@TCAP can be used in eutrophic lake for sediment internal P loading management.
登录
查看更多内容
影响因子：
11.1
作者：
Hongbin Yin;M. Kong;Guan Xiaohong;Huiui Chen
通讯作者：
Hongbin Yin;M. Kong;Guan Xiaohong;Huiui Chen
影响因子：
11.4
作者：
Schindler, David W.;Carpenter, Stephen R.;Orihel, Diane M.
通讯作者：
Orihel, Diane M.
DOI：
10.1016/j.scitotenv.2017.11.198
发表时间：
2018-04
期刊：
The Science of the total environment
影响因子：
--
作者：
M. Mucci;Valentini Maliaka;N. Noyma;M. Marinho;M. Lürling
通讯作者：
M. Mucci;Valentini Maliaka;N. Noyma;M. Marinho;M. Lürling
影响因子：
1.5
作者：
E. Welch;H. Gibbons;S. K. Brattebo;H. Corson-Rikert
通讯作者：
E. Welch;H. Gibbons;S. K. Brattebo;H. Corson-Rikert
影响因子：
2.1
作者：
H. Paerl
通讯作者：
H. Paerl