Enhancing rural drinking water safety using an Mg–Al-type layered double hydroxide foil as a new point-of-use disinfection tool
Point-of-use (POU) drinking water treatment is crucial for residents in resource-constrained areas. This study introduces a layered double hydroxide (LDH) foil, an innovative POU device that eliminates waterborne pathogens via adsorption. It is an aluminum foil coated with magnesium–aluminum (Mg–Al)...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2023-11-01
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| Series: | Journal of Water, Sanitation and Hygiene for Development |
| Subjects: | |
| Online Access: | http://washdev.iwaponline.com/content/13/11/921 |
| _version_ | 1827615047182974976 |
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| author | Taufiq Ihsan Erni Johan Satoru Fukugaichi Naoto Matsue |
| author_facet | Taufiq Ihsan Erni Johan Satoru Fukugaichi Naoto Matsue |
| author_sort | Taufiq Ihsan |
| collection | DOAJ |
| description | Point-of-use (POU) drinking water treatment is crucial for residents in resource-constrained areas. This study introduces a layered double hydroxide (LDH) foil, an innovative POU device that eliminates waterborne pathogens via adsorption. It is an aluminum foil coated with magnesium–aluminum (Mg–Al)-type LDH, a recognized human-safe pathogen adsorbent. Its sheet-like morphology enables easy retrieval of inherently powdered LDH from post-disinfected water. Coating with Mg–Al LDH foils was accomplished by immersing aluminum foils in alkaline magnesium solutions, resulting in the on-surface formation of LDH. Using 12 distinct alkaline magnesium solutions, 12 types of LDH foils were prepared. Most LDH foils demonstrated >99% removal of Escherichia coli (DH5α strain) within 3–24 h when 100 mL of water was inoculated with DH5α at approximately 103 colony-forming units (CFU)/mL agitated with a 25-cm2 LDH foil piece. The LDH foil with the highest efficacy had a maximum adsorption capacity of approximately 1.3 × 106 CFU per 1-cm2 LDH foil. Furthermore, the LDH foil was regenerated by submersing it in the alkaline solution during its preparation, enabling multiple reuses. Owing to its straightforward production and application, the LDH foil holds substantial promise as a convenient-to-use adsorbent for batch water disinfection, such as jug water, in rural households.
HIGHLIGHTS
LDH foils, composed of aluminum foil coated with an Mg–Al-type LDH, function as a pathogen adsorbent.;
Preparation involves a single step using various Mg sources and alkaline reagents.;
Adding, removing, and regenerating LDH foils are all simple processes.;
Validation tests with actual water samples are essential to confirm its effectiveness.; |
| first_indexed | 2024-03-09T09:04:34Z |
| format | Article |
| id | doaj.art-e126eef4430345f2b90fc3fec78d27ad |
| institution | Directory Open Access Journal |
| issn | 2043-9083 2408-9362 |
| language | English |
| last_indexed | 2024-03-09T09:04:34Z |
| publishDate | 2023-11-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Journal of Water, Sanitation and Hygiene for Development |
| spelling | doaj.art-e126eef4430345f2b90fc3fec78d27ad2023-12-02T10:48:46ZengIWA PublishingJournal of Water, Sanitation and Hygiene for Development2043-90832408-93622023-11-01131192193010.2166/washdev.2023.206206Enhancing rural drinking water safety using an Mg–Al-type layered double hydroxide foil as a new point-of-use disinfection toolTaufiq Ihsan0Erni Johan1Satoru Fukugaichi2Naoto Matsue3 The United Graduate School of Agricultural Sciences, Ehime University, 3-5-7 Tarumi, Matsuyama 790-8566, Japan The United Graduate School of Agricultural Sciences, Ehime University, 3-5-7 Tarumi, Matsuyama 790-8566, Japan Paper Industry Innovation Center, Ehime University, 3 Bunkyo-Cho, Matsuyama 790-8577, Japan The United Graduate School of Agricultural Sciences, Ehime University, 3-5-7 Tarumi, Matsuyama 790-8566, Japan Point-of-use (POU) drinking water treatment is crucial for residents in resource-constrained areas. This study introduces a layered double hydroxide (LDH) foil, an innovative POU device that eliminates waterborne pathogens via adsorption. It is an aluminum foil coated with magnesium–aluminum (Mg–Al)-type LDH, a recognized human-safe pathogen adsorbent. Its sheet-like morphology enables easy retrieval of inherently powdered LDH from post-disinfected water. Coating with Mg–Al LDH foils was accomplished by immersing aluminum foils in alkaline magnesium solutions, resulting in the on-surface formation of LDH. Using 12 distinct alkaline magnesium solutions, 12 types of LDH foils were prepared. Most LDH foils demonstrated >99% removal of Escherichia coli (DH5α strain) within 3–24 h when 100 mL of water was inoculated with DH5α at approximately 103 colony-forming units (CFU)/mL agitated with a 25-cm2 LDH foil piece. The LDH foil with the highest efficacy had a maximum adsorption capacity of approximately 1.3 × 106 CFU per 1-cm2 LDH foil. Furthermore, the LDH foil was regenerated by submersing it in the alkaline solution during its preparation, enabling multiple reuses. Owing to its straightforward production and application, the LDH foil holds substantial promise as a convenient-to-use adsorbent for batch water disinfection, such as jug water, in rural households. HIGHLIGHTS LDH foils, composed of aluminum foil coated with an Mg–Al-type LDH, function as a pathogen adsorbent.; Preparation involves a single step using various Mg sources and alkaline reagents.; Adding, removing, and regenerating LDH foils are all simple processes.; Validation tests with actual water samples are essential to confirm its effectiveness.;http://washdev.iwaponline.com/content/13/11/921disinfectiondrinking waterlayered double hydroxidepathogen adsorptionrural area |
| spellingShingle | Taufiq Ihsan Erni Johan Satoru Fukugaichi Naoto Matsue Enhancing rural drinking water safety using an Mg–Al-type layered double hydroxide foil as a new point-of-use disinfection tool Journal of Water, Sanitation and Hygiene for Development disinfection drinking water layered double hydroxide pathogen adsorption rural area |
| title | Enhancing rural drinking water safety using an Mg–Al-type layered double hydroxide foil as a new point-of-use disinfection tool |
| title_full | Enhancing rural drinking water safety using an Mg–Al-type layered double hydroxide foil as a new point-of-use disinfection tool |
| title_fullStr | Enhancing rural drinking water safety using an Mg–Al-type layered double hydroxide foil as a new point-of-use disinfection tool |
| title_full_unstemmed | Enhancing rural drinking water safety using an Mg–Al-type layered double hydroxide foil as a new point-of-use disinfection tool |
| title_short | Enhancing rural drinking water safety using an Mg–Al-type layered double hydroxide foil as a new point-of-use disinfection tool |
| title_sort | enhancing rural drinking water safety using an mg al type layered double hydroxide foil as a new point of use disinfection tool |
| topic | disinfection drinking water layered double hydroxide pathogen adsorption rural area |
| url | http://washdev.iwaponline.com/content/13/11/921 |
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