När läroplanens mål och innehåll blir ämnen på schemat

Alm, Fredrik

doi:10.1080/16522729.2004.11803882

Cited by 2 publications

(2 citation statements)

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“…In Sweden, snow meltwater is considered wastewater which has certain quality standards [VIJAYVAN et al 2019]. Thus, in Swedish stormwater quality guidelines, the following concentrations are recommended: Cd -0.45 µg•dm -3 , Cu -30 µg•dm -3 , Ni -20 µg•dm -3 , Pb -10 µg•dm -3 , Zn -90 µg•dm -3 [ALM et al 2010]. Comparison of the studied meltwater with stormwater quality standards showed no exceedances.…”

Section: Ecological Risk Assessment Of the Trace Elements In Snowmeltmentioning

confidence: 99%

Journal of Water and Land Development

2022

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Atmospheric deposition, vehicular transportation and de-icing agents are major sources polluted snow in urban. This study investigates the current trace elements concentrations of snow and de-icing using ICP-MS, and phytotoxicity using three vascular plants in snow. The study assesses the contamination, classification and phytotoxicity of snow quality removed from roads of residential areas and piled on children's playgrounds in residential territories. The research found that according to Russian environmental quality standard for water has been identified the exceeding trace elements in snow by W, Se, Mn, Cu, V, Mo, Ni and Zn. The pollution indices (PLI, CF and Zc) were identified pollution level of snow piles from moderate contamination to very high contamination. Based on average germination index values for Sinapis alba L., Lepidium sativum L., and Triticum aestivum L., the degree of inhibition in snow piles varied from no inhibition to strong inhibition. The trace elements content in de-icing "Galit А" and salt sand mix are defined in the following descending order: Zn > Mn > Ba > V > Rb > Sr and Mn > Ba > Cr > V > Sr > Ni, respectively. High concentrations of trace elements in snow piles are a source of environmental pollution. To prevent snow storage and disposal in residential areas should be involved in future studies of environmental pollution and circular economy, so that environmental managers can reduce threats to the environment and public health, as well as initiate circular economy projects in urban areas.

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Section: Ecological Risk Assessment Of the Trace Elements In Snowmeltmentioning

confidence: 99%

Journal of Water and Land Development

2022

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“…Målarbetets första, mer öppna, osäkra och reflekterande steg har fått stå tillbaka för processen att göra delmålen tydliga och avprickningsbara. Den viktiga urvalsfrågan har trängts ut av formoch kontrollfrågor, vilket beläggs av en annan studie inom forsöksverk-samheten (Alm 2004). Traditionella ämnesbeteckningar på schemat har gett utrymme till alternativ som handlar om form/arbetssätt och samtal/social sam-varo, planering och utvärdering.…”

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Tiden i måluppfyllelsens tjänst

Westlund

2004

Studies in Educational Policy and Educational Philosophy

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När läroplanens mål och innehåll blir ämnen på schemat

Cited by 2 publications

References 0 publications

Journal of Water and Land Development

Journal of Water and Land Development

Tiden i måluppfyllelsens tjänst

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