Removal of ammonia nitrogen from aqueous media with low-cost adsorbents: a review

L Feng, T Qiu, H Yan, C Liu, Y Chen, X Zhou… - Water, Air, & Soil …, 2023 - Springer
Ammonia nitrogen pollutant in aqueous media is difficult to treat, which leads to a deterioration
of pristine water ecosystems because of eutrophication and poses significant risks to …

Adsorption and depression mechanism of an eco-friendly depressant dextrin onto fluorite and calcite for the efficiency flotation separation

Y Chen, B Feng, H Yan, L Zhang, C Zhong… - Colloids and Surfaces A …, 2022 - Elsevier
In this work, dextrin, an effective and eco-friendly organic compound, was used to separate
fluorite from calcite. The depression performance and adsorption mechanism of it on the …

Rare earth recovery from fluoride molten-salt electrolytic slag by sodium carbonate roasting-hydrochloric acid leaching

H Wu, H Yan, Y Liang, S Qiu, X Zhou, D Zhu, T Qiu - Journal of Rare Earths, 2023 - Elsevier
… Author links open overlay panel Hao Wu a b c , Huashan Yan a b c , Yanzhen Liang c , Sen
Qiu a c , Xiaowen Zhou a b c , Dongmei Zhu a … Xue, YD Yan, ZC Ma, FQ Ma, ML Zhang, et al. …

Compound leaching behavior and regularity of ionic rare earth ore

H Yan, T Liang, Q Liu, T Qiu, G Ai - Powder Technology, 2018 - Elsevier
Ammonium sulfate in situ leaching process is the most widely used extraction technology for
ionic rare earth (RE) ores. Although the leaching process is simple, the leaching rate is …

Response surface method for optimization of leaching of a low-grade ionic rare earth ore

T Qiu, H Yan, J Li, Q Liu, G Ai - Powder technology, 2018 - Elsevier
China's ionic rare earth ore is of great strategic value because of its abundant medium and
heavy rare earth elements (REEs). However, its rare earth reserves have decreased …

Adsorption of hydrated Al3+ on the kaolinite (001) surface: A density functional theory study

Y Miao, H Yan, X Qiu, X Zhou, D Zhu, X Li, T Qiu - Applied Clay Science, 2022 - Elsevier
In order to reveal the microscopic occurrence of Al 3+ impurity in ionic rare earth ore on
kaolinite surface, density functional theory (DFT) was used to construct the stable hydrate model …

Theoretical investigation of hydrated [Lu (OH) 2]+ adsorption on kaolinite (0 0 1) surface with DFT calculations

S Qiu, H Wu, H Yan, X Li, X Zhou, T Qiu - Applied Surface Science, 2021 - Elsevier
Kaolinite is a major mineral present in ion-adsorption rare earth ores, which are the primary
source of lutetium (Lu). In those ores, Lu is mainly found to be adsorbed on the kaolinite …

Influence mechanism of leaching agent anions on the leaching of aluminium impurities in ionic-type rare earth ores: A DFT simulation combined with experimental …

Q Long, H Yan, H Wu, S Qiu, X Zhou, T Qiu - Separation and Purification …, 2025 - Elsevier
The aluminium impurity present during the leaching process of ionic-type rare earth ores
increases the complexity and cost of the subsequent dealumination procedure, causing the loss …

Investigation of protonation and deprotonation processes of kaolinite and its effect on the adsorption stability of rare earth elements

S Qiu, T Qiu, H Yan, Q Long, H Wu, X Li… - Colloids and Surfaces A …, 2022 - Elsevier
The surface hydroxyl groups of kaolinite can be protonated and deprotonated, which have
an effect on the adsorption of rare earth elements (REEs). In this paper, the protonation and …

Flotation separation of bastnaesite from fluorite with an eco-friendly depressant polyepoxysuccinic acid and its depression mechanism

Q Nie, T Qiu, H Yan, Y Li - Applied Surface Science, 2022 - Elsevier
In this work, an eco-friendly depressant polyepoxysuccinic acid (PESA) was introduced for
the flotation separation of bastnaesite from fluorite using octyl hydroxamic acid (OHA) as the …