Adsorption of Arsenic and Lead onto Stone Powder and Chitosan-Coated Stone Powder

Jung, Kyung‐Won; Oh, Sanghwa; Bak, Hun; Song, Gun-Ho; Kim, Hong-Tae

doi:10.3390/pr7090599

Cited by 11 publications

(15 citation statements)

References 27 publications

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“…The pH of the above Pb 2+ test solution is about 7, This is consistent with that of previous reports [40][41][42]. Different pH solutions were prepared by using hydrochloric acid, sodium hydroxide, and deionized water, and the fiber-optic sensors were used to detect the solutions by using different pH.…”

Section: Sensor Stabilitysupporting

confidence: 88%

Fiber-optic lead ion sensor based on MXene film integrated michelson interference structure

Xiong¹,

Zhuang²,

Feng³

2023

Phys. Scr.

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Ti3C2Tx (MXene), a two-dimensional material prepared by solution etching, has abundant functional groups on its surface, which makes it have a great prospect in the field of biosensing environmental detection. In this work, a new optical fiber sensor integrated with MXene is proposed and fabricated. The sensor is constituted of a three-core fiber (TCF), a single-mode fiber (SMF), and a no-core fiber (NCF) to form a Michelson interference structure. The results indicate that MXene decorated fiber-optic sensor can detect trace lead ions (Pb2+) and has a good response to the Pb2+ solutions with the concentration of 0-100 μM. At 0.001 μM (i.e., 0.286 ppb) Pb2+, the response time is about 2 minutes. In addition, the fiber-optic sensor has excellent temperature, pH, and time stability. The present work provides a new idea for the detection of Pb2+ in heavy metal pollution fields.

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Section: Sensor Stabilitysupporting

confidence: 88%

Fiber-optic lead ion sensor based on MXene film integrated michelson interference structure

Xiong¹,

Zhuang²,

Feng³

2023

Phys. Scr.

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“…SP was obtained from a masonry mill in Yeongcheon, Korea, air-dried, sieved using a 75 µm mesh (sieve #200), and stored in an airtight plastic bottle before use [38]…”

Section: Methodsmentioning

confidence: 99%

Adsorptive Removal of Arsenic and Lead by Stone Powder/Chitosan/Maghemite Composite Beads

Pak

Phiri

et al. 2021

IJERPH

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Arsenic (As) and lead (Pb) contamination in groundwater is a serious problem in countries that use groundwater as drinking water. In this study, composite beads, called SCM beads, synthesized using stone powder (SP), chitosan (Ch), and maghemite (Mag) with different weight ratios (1/1/0.1, 1/1/0.3, and 1/1/0.5 for SP/Ch/Mag) were prepared, characterized and used as adsorbents for the removal of As and Pb from artificially contaminated water samples. Adsorption isotherm experiments of As and Pb onto the beads were conducted and single-solute adsorption isotherm models such as the Langmuir, Freundlich, Dubinin–Radushkevich (DR), and dual mode (DM) models were fitted to the experimental data to analyze the adsorption characteristics. The maximum adsorption capacities of the SCM beads were 75.7 and 232.8 mmol/kg for As and Pb, respectively, which were 40 and 5.6 times higher than that of SP according to the Langmuir model analyses. However, the DM model had the highest determinant coefficient (R2) values for both As and Pb adsorption, indicating that the beads had heterogenous adsorption sites with different adsorption affinities. These magnetic beads could be utilized to treat contaminated groundwater.

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“…Sorbents, materials, or mixtures of insoluble materials are used to recover fluids during adsorption, physical attachment, or both [66][67][68][69][70][71][72][73][74][75][76]. Adsorbents must be absorbent of oil compounds and also waterproof [77].…”

Section: Adsorption Methodsmentioning

confidence: 99%

Petroleum Hydrocarbon Removal from Wastewaters: A Review

et al. 2020

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Oil pollutants, due to their toxicity, mutagenicity, and carcinogenicity, are considered a serious threat to human health and the environment. Petroleum hydrocarbons compounds, for instance, benzene, toluene, ethylbenzene, xylene, are among the natural compounds of crude oil and petrol and are often found in surface and underground water as a result of industrial activities, especially the handling of petrochemicals, reservoir leakage or inappropriate waste disposal processes. Methods based on the conventional wastewater treatment processes are not able to effectively eliminate oil compounds, and the high concentrations of these pollutants, as well as active sludge, may affect the activities and normal efficiency of the refinery. The methods of removal should not involve the production of harmful secondary pollutants in addition to wastewater at the level allowed for discharge into the environment. The output of sewage filtration by coagulation and dissolved air flotation (DAF) flocculation can be transferred to a biological reactor for further purification. Advanced coagulation methods such as electrocoagulation and flocculation are more advanced than conventional physical and chemical methods, but the major disadvantages are the production of large quantities of dangerous sludge that is unrecoverable and often repelled. Physical separation methods can be used to isolate large quantities of petroleum compounds, and, in some cases, these compounds can be recycled with a number of processes. The great disadvantage of these methods is the high demand for energy and the high number of blockages and clogging of a number of tools and equipment used in this process. Third-party refinement can further meet the objective of water reuse using methods such as nano-filtration, reverse osmosis, and advanced oxidation. Adsorption is an emergency technology that can be applied using minerals and excellent materials using low-cost materials and adsorbents. By combining the adsorption process with one of the advanced methods, in addition to lower sludge production, the process cost can also be reduced.

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Adsorption of Arsenic and Lead onto Stone Powder and Chitosan-Coated Stone Powder

Cited by 11 publications

References 27 publications

Fiber-optic lead ion sensor based on MXene film integrated michelson interference structure

Fiber-optic lead ion sensor based on MXene film integrated michelson interference structure

Adsorptive Removal of Arsenic and Lead by Stone Powder/Chitosan/Maghemite Composite Beads

Petroleum Hydrocarbon Removal from Wastewaters: A Review

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