Harmful weed to prospective adsorbent: low-temperature–carbonized Ipomoea carnea stem carbon coated with aluminum oxyhydroxide nanoparticles for defluoridation

Saikia, Jitu; Sarmah, Susmita; Saikia, Prakash J.; Goswamee, Rajib Lochan

doi:10.1007/s11356-018-3572-z

Cited by 8 publications

(4 citation statements)

References 49 publications

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“…e study [117] claims the adsorption capacity as 46.55-53.71 mg g −1 at pH 6 to 8 although the efficiency drops at real groundwater application. Moreover, the author suggests this method as an effective utilization of cumbrous weed and low-cost method in addition to commercially available methods (e.g., RO technique).…”

Section: Other Novel and Green Approachesmentioning

confidence: 95%

Fluoride in Drinking Water and Nanotechnological Approaches for Eliminating Excess Fluoride

Premathilaka

Liyanagedera

2019

Journal of Nanotechnology

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Arising awareness of health hazards due to long-term exposure of fluoride has led researchers to seek for more innovative strategies to eliminate excess fluoride in drinking water. Fluoride-bearing chemicals in both natural and anthropogenic sources contaminate drinking water, which mainly cause for human fluoride ingestion. Hence, developing sustainable approaches toward alleviation is essential. Among many emerging techniques of defluoridation, nanotechnological approaches stand out owing to its high efficiency, and hence, as in many areas, nanotechnology for excess fluoride removal in water is gaining ground compared to other conventional adsorbents and process. The present review focuses on some of the advanced and recent nanoadsorbents including their strengths and shortcomings (e.g., CNT, LDH, graphene-based nanomaterials, and magnetic nanomaterials) and other processes involving nanotechnology while discussing basic aspects of hydrochemistry of fluoride and geological conditions leading for water fluoride contamination. Considering all the findings in survey, it is evident that developing more sustainable techniques is essential rather than conducting batch-type experiments solely.

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Section: Other Novel and Green Approachesmentioning

confidence: 95%

Fluoride in Drinking Water and Nanotechnological Approaches for Eliminating Excess Fluoride

Premathilaka

Liyanagedera

2019

Journal of Nanotechnology

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“…Collection of Ipomoea carnea commonly known as pink morning glory stems and its carbonization is reported in our previous work [19]. Briefly, to obtain good quality low temperature carbonized carbon, Sun dried Ipomoea stems were carbonized in a muffle furnace (IKON, India, model no-Ik-108, size 6″ × 6″ × 12″, Rating 4 kW) at an optimized temperature of 450 °C for 1 h. Carbonized stems were washed with double distilled water and dried in a hot air oven at 40 °C overnight and finally ground in a planetary micro pulverizer (M/S Fritsch, Germany) at 600 rpm for 2 min using zirconium balls.…”

Section: Preparation Of Coating Materialsmentioning

confidence: 99%

“…Preparation of nano-aluminum oxyhydroxide deposited carbon (NAOC) is reported in our previous work [19]. Briefly, well ground carbons was functionalized by 5 N HNO 3 solutions at 80 °C for 1 h under refluxed condition and then filtered, washed and dried in a hot air oven at 110 °C until it was completely dried.…”

Section: Preparation Of Coating Materialsmentioning

confidence: 99%

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Use of carbon coated ceramic barriers for adsorptive removal of fluoride and permanent immobilization of the spent adsorbent barriers

Saikia

Goswamee

2019

SN Appl. Sci.

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This work is focused on the coating of carbon particles on a clay based flat ceramic substrate by vacuum driven filtration deposition and its use for the separation of fluoride from contaminated water. A thin and smooth layer of nanoaluminum oxyhydroxide deposited carbon over the porous clay based flat ceramic support was obtained by the simple vacuum suction technique. The coated membrane was able to remove fluoride with good efficiency. Post adsorption barriers containing toxic fluoride ions cannot be simply thrown away but fluoride ions need to be immobilized in it to prevent its leaching from it. Therefore, another important component of the work is the permanent immobilization of fluoride adsorbed membrane (FCM) in cement clinkers by reacting with lime and clay by black meal method of clinker preparation. All the necessary phases like tricalcium silicate (3CaO•SiO 2), dicalcium silicate (2CaO•SiO 2), tricalcium aluminate (3CaO•Al 2 O 3) and tetra calcium aluminoferrite (4CaO•Al 2 O 3 Fe 2 O 3) found in a typical portland cement clinkers are observed in the prepared clinkers and confirmed from X-ray diffractometry. The studies showed that conventional firing temperature of 1450 °C for clinker formation could be lowered to 1350 °C by the addition of fluoride adsorbed ceramic waste due taking advantage of mineralizers such as F − and Al 3+ and the carbonaceous materials which facilitated the firing process. The fluoride leaching studies confirmed the acceptability of the process.

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Nanoadsorption: An innovational and compelling approach toward fluoride remediation from water

Khalid

Nazir

2022

Separations of Water Pollutants With Nanotechnology

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Harmful weed to prospective adsorbent: low-temperature–carbonized Ipomoea carnea stem carbon coated with aluminum oxyhydroxide nanoparticles for defluoridation

Cited by 8 publications

References 49 publications

Fluoride in Drinking Water and Nanotechnological Approaches for Eliminating Excess Fluoride

Fluoride in Drinking Water and Nanotechnological Approaches for Eliminating Excess Fluoride

Use of carbon coated ceramic barriers for adsorptive removal of fluoride and permanent immobilization of the spent adsorbent barriers

Nanoadsorption: An innovational and compelling approach toward fluoride remediation from water

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