Generation and Determination of Negative Air Ions

Lin, Haifeng; Lin, Jin‐Ming

doi:10.1007/s41664-017-0007-7

Cited by 24 publications

(22 citation statements)

References 21 publications

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“…Because the oxygen molecule has a relatively strong electrical affinity, it can obtain electrons in preference to other molecules in the air under the same conditions, thereby forming a negative oxygen ion [4][5][6]. These negative oxygen ions are the main components of NAIs; thus, NAIs are sometimes called negative oxygen ions [7].…”

Section: Introductionmentioning

confidence: 99%

Random Forest Algorithm for the Relationship between Negative Air Ions and Environmental Factors in an Urban Park

Miao

Zhang

Han³

et al. 2018

Atmosphere

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Negative air ions (NAIs) are a natural component of air and have a positive impact on the health of urban residents. Few studies have focused on the relationship between NAI concentration (NAIC) in the urban atmosphere and environmental factors, such as meteorological factors and air pollutants. Therefore, we established observation points in Zhongshan Park in downtown Shanghai, China, and continuously measured and recorded changes in NAIC for one year. We also monitored nine meteorological factors and six atmospheric pollutants. Through correlation analysis and multiple linear regression analysis, the key factors influencing NAIC were screened, and the effects of those factors on NAIC were explored using the random forest algorithm. The results show that NAIC is most sensitive to humidity, followed by radiation and temperature, and finally to PM2.5. Humidity is the most critical factor, primarily because it directly affects the formation of NAIs from both the environment and vegetation. Furthermore, our results reveal that the mechanisms through which NAIC is influenced by the same factor varies seasonally. We analyzed the relationship between NAIC in an urban atmosphere and environmental factors by using big data, which is a new method for studying the relationships between NAIs and environmental factors. Our results indicate potential explanations for the mechanisms underlying NAI response to various environmental factors.

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Section: Introductionmentioning

confidence: 99%

Random Forest Algorithm for the Relationship between Negative Air Ions and Environmental Factors in an Urban Park

Miao

Zhang

Han³

et al. 2018

Atmosphere

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“…Furthermore, many NAI generators release ozone, including well-known brand ionizers [19][20][21][22][23]. Lin et al [24] found out that artificial NAIs also generated byproducts of noxious gas such as ozone and nitric oxide, and discovered that PAIs act on certain activities such as exciting sympathetic nerves, leading to a harmful impact on human health.…”

Section: Introductionmentioning

confidence: 99%

Generating Negative Air Ions in Construction Waterscapes at a Garden Scale

Chu

Chen

et al. 2019

Environments

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High concentrations of negative air ions (NAIs) and low concentrations of positive air ions (PAI), along with a low monopole coefficient (PAI/NAI), are likely to provide physiological and psychological benefits to the humans. A water body produces NAIs through the Lenard effect. This concept can be applied in designing garden waterscapes in residential buildings to provide fresh and healthy air for urban residents. In this study, we conducted several experiments to assess the effectiveness of different waterscape designs in producing air ions. The results revealed that increasing waterfall tiers, slopes, impact points, widths, and heights increased the NAI concentrations and reduced the values of monopole coefficients, thus providing health benefits to humans. In particular, increasing waterfall tiers and slopes increased the NAI concentrations most substantially. Moreover, we established a composite waterscape and determined that it produced fewer NAIs along with a less favorable monopole coefficient compared with the data observed at the experimentally adjusted tiers and slopes. Therefore, we suggest that simple waterscapes with multiple waterfall tiers or steep waterfall slopes should be favored over complex waterscapes. Such simple designs can help construct a garden that provides health benefits.

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“…Beta particles released from radioactive elements, emit electrons that bind to oxygen molecules (O 2 ), resulting NAI (O 2 -) formation. Ionizing radiation usually generates more small negative ions in the air 29 .…”

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confidence: 99%

“…As secondary natural physical ionizing agents (or generation mechanisms), include: shearing of water droplets (waterfall, rainfall, steam, mist -Lenard Effect), hot spring nascent, UV rays, sunlight, photosynthesis (forest), photoelectric emission, lighting excitation, electricity (corona discharge), electrostatic force, aurora borealis, cave, mountain, rapid flow of great air volumes over a land mass (Fohn, Sharav, Santa Anna), wind (sand and snow friction) [29][30][31][32][33][34] .…”

mentioning

confidence: 99%

“…Some human activities capable to generate air ions: urban garden (blue/green space), wet sauna, water park, ionization place, artificial ionizers (corona discharges, thermionic electron emission from hot metal electrodes or photo-electrodes, radiation from radioisotopes, UV irradiation, high-pressure water injection, anion 33 incentive, tourmaline and other natural ores), dense urbanization atmosphere, pollution, suspended particles, power lines, industrial and vehicular emissions [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] .…”

mentioning

confidence: 99%

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Progress of negative air ions in health tourism environments applications

Lazzerini¹,

Orlando²,

Pra³

2018

Bol Soc Esp Hidrol Med

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The acknowledge on air ions beneficial bioactivities, especially those negative charge, small size and oxygen composition rich atmospheres; may indicate local environmental quality, increase health tourism attractiveness, promote wellbeing and support therapies. Negative air ions (NAI) microclimates anomalies by natural mechanisms or controlled generations may indicate a natural therapeutic factor (NTF) to the health resort medicine, SPA and wellness tourism development. To identify these kind occurrences and their potential bioactivities, this study employs literature review concerning "air ions" definitions, classifications, genesis, environments, anomalies, NAI/cm 3 measurements, bioactivity range and healthy applications. Followed by sites selection, with comparative features at preferably traditional wellness or health tourism destinations; where "in situ" NAI concentrations are measured for further physical comparisons and likely healing indications at each place maximum NAI value observed. The case studies here are six Brazilian locations: 1. Itaipuland/PR (Cave SPA termal); 2a. Guarapari/ES (Areia Preta beach) y 2b. Guarapari/ES (Seacoast downtown); 3. Aguas de Lindoia/SP (Public balneary and emanatorium); 4. Foz do Iguaçu/PR (Cataratas Waterfalls Park); 5. Caldas de Cipó/BA (Urban public thermal pool); and 6. Piracicaba/SP (Riverside urban forest Park). Mainly NAI generation characteristics and level concentrations evaluated, resemble to their world similar examples reviewed. The values ranging between 2100 to 156000 NAI/cm 3 implies all locations chosen as potential NTF at invigorating environment, clean fresh air atmosphere, satisfactory tourism air quality index, market biological effects to health resort programs and psychological benefits. Just cases destinations 1, 2, 3 and 4 endue ionic density (>15000 NAI/cm 3) possibly used for air ionotherapy treatments, including medical specialties: neurology, rheumatology, dermatology, pneumology and immunology.

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Generation and Determination of Negative Air Ions

Cited by 24 publications

References 21 publications

Random Forest Algorithm for the Relationship between Negative Air Ions and Environmental Factors in an Urban Park

Random Forest Algorithm for the Relationship between Negative Air Ions and Environmental Factors in an Urban Park

Generating Negative Air Ions in Construction Waterscapes at a Garden Scale

Progress of negative air ions in health tourism environments applications

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