Contaminant removal by efficient separation of in situ formed layered double hydroxide compounds from mine wastewaters

The efficient removal of a range of anionic and cationic contaminants from acid mine waters to facilitate water reuse or for safe discharge constitutes a major environmental challenge.

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Innovative in situ remediation of mine waters using a layered double hydroxide-biochar composite

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2021.127136 ◽

2021 ◽

pp. 127136

Author(s):

Veronika Veselská ◽

Hana Šillerová ◽

Barbora Hudcová ◽

Gildas Ratié ◽

Petr Lacina ◽

...

Keyword(s):

Layered Double Hydroxide ◽

In Situ Remediation ◽

Mine Waters ◽

Double Hydroxide

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In situ synthesis of hierarchical cobalt-aluminum layered double hydroxide on boehmite surface for efficient removal of arsenate from aqueous solutions: Effects of solution chemistry factors and sorption mechanism

Chemical Engineering Journal ◽

10.1016/j.cej.2019.03.043 ◽

2019 ◽

Vol 368 ◽

pp. 914-923 ◽

Cited By ~ 10

Author(s):

Seon Yong Lee ◽

Kyung-Won Jung ◽

Jae-Woo Choi ◽

Young Jae Lee

Keyword(s):

Aqueous Solutions ◽

Layered Double Hydroxide ◽

In Situ Synthesis ◽

Solution Chemistry ◽

Sorption Mechanism ◽

Efficient Removal ◽

Double Hydroxide

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Rapid Removal and Efficient Recovery of Tetracycline Antibiotics in Aqueous Solution Using Layered Double Hydroxide Components in an In Situ-Adsorption Process

Crystals ◽

10.3390/cryst9070342 ◽

2019 ◽

Vol 9 (7) ◽

pp. 342 ◽

Cited By ~ 3

Author(s):

Kwanjira Panplado ◽

Maliwan Subsadsana ◽

Supalax Srijaranai ◽

Sira Sansuk

Keyword(s):

Aqueous Solution ◽

Layered Double Hydroxide ◽

Environmental Water ◽

Efficient Removal ◽

In Situ Adsorption ◽

Aluminum Ions ◽

Alkaline Conditions ◽

Efficient Recovery ◽

Double Hydroxide

This work demonstrates a simple approach for the efficient removal of tetracycline (TC) antibiotic from an aqueous solution. The in situ-adsorption removal method involved instant precipitation formation of mixed metal hydroxides (MMHs), which could immediately act as a sorbent for capturing TC from an aqueous solution, by employing layered double hydroxide (LDH) components including magnesium and aluminum ions in alkaline conditions. By using this approach, 100% removal of TC can be accomplished within 4 min under optimized conditions. The fast removal possibly resulted from an instantaneous adsorption of TC molecules onto the charged surface of MMHs via hydrogen bonding and electrostatically induced attraction. The results revealed that our removal technique was superior to the use of LDH as a sorbent in terms of both removal kinetics and efficiency. Moreover, the recovery of captured TC was tested under the influence of various common anions. It was found that 98% recovery could be simply achieved by using phosphate, possibly due to its highly charged density. Furthermore, this method was successful for efficient removal of TC in real environmental water samples.

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