title: Evidence for a seasonal fluctuation of arsenic in New Zealand's longest river and the effect of treatment on concentrations in drinking water

authors: McLaren, Stuart J.

subjects: arsenic

abstract: A year-long survey, with samples collected weekly, was conducted to estimate long-term average concentrations of arsenic in treated and untreated drinking water for the city of Hamilton, New Zealand. The average concentration of arsenic in Waikato River water at Hamilton before processing was found to be (32•1 ± 3•7) μg litre⁻¹, about three times above the new WHO limit of 10 μg litre⁻¹. However, full conventional water treatment effects a five-fold reduction in arsenic concentrations in drinking water to a level which meets the new standards of (6•2 ± 0•8) μg litre⁻¹. The results of both this study and retrospective analysis of archived data suggest that total arsenic concentrations in the Waikato River are likely to follow a regular seasonal variation, being about 10–25 μg litre⁻¹ higher in the summer months. Changes in river flow rates have an almost negligible effect on the summer peak and winter trough; it is proposed that most of the variation in total arsenic concentrations may be due to the seasonal conversion of arsenic in the river sediments to more soluble forms.

text: Evidence for a seasonal fluctuation of arsenic in New Zealand's longest river and the effect of treatment on concentrations in drinking water A year-long survey, with samples collected weekly, was conducted to estimate long-term average concentrations of arsenic in treated and untreated drinking water for the city of Hamilton, New Zealand. The average concentration of arsenic in Waikato River water at Hamilton before processing was found to be (32•1 ± 3•7) μg litre⁻¹, about three times above the new WHO limit of 10 μg litre⁻¹. However, full conventional water treatment effects a five-fold reduction in arsenic concentrations in drinking water to a level which meets the new standards of (6•2 ± 0•8) μg litre⁻¹. The results of both this study and retrospective analysis of archived data suggest that total arsenic concentrations in the Waikato River are likely to follow a regular seasonal variation, being about 10–25 μg litre⁻¹ higher in the summer months. Changes in river flow rates have an almost negligible effect on the summer peak and winter trough; it is proposed that most of the variation in total arsenic concentrations may be due to the seasonal conversion of arsenic in the river sediments to more soluble forms.

year: 1995

title: Investigating socioscientific issues via scientific habits of mind: Development and validation of the scientific habits of mind survey.

authors: Çalik, Muammer

subjects: Habits of Mind

abstract: In this paper, we describe the Scientific Habits of Mind Survey (SHOMS) developed to explore public, science teachers', and scientists' understanding of habits of mind (HoM). The instrument contained 59 items, and captures the seven SHOM identified by Gauld. The SHOM was validated by administration to two cohorts of pre-service science teachers: primary science teachers with little science background or interest (n = 145), and secondary school science teachers (who also were science graduates) with stronger science knowledge (n = 145). Face validity was confirmed by the use of a panel of experts and a pilot study employing participants similar in demographics to the intended sample. To confirm convergent and discriminant validity, confirmatory factor analysis and evaluation of the reliability were calculated. Statistical data and other data gathered from interviews suggest that the SHOMS will prove to be a useful tool for educators and researchers who wish to investigate HoM for a variety of participants.

text: Investigating socioscientific issues via scientific habits of mind: Development and validation of the scientific habits of mind survey. In this paper, we describe the Scientific Habits of Mind Survey (SHOMS) developed to explore public, science teachers', and scientists' understanding of habits of mind (HoM). The instrument contained 59 items, and captures the seven SHOM identified by Gauld. The SHOM was validated by administration to two cohorts of pre-service science teachers: primary science teachers with little science background or interest (n = 145), and secondary school science teachers (who also were science graduates) with stronger science knowledge (n = 145). Face validity was confirmed by the use of a panel of experts and a pilot study employing participants similar in demographics to the intended sample. To confirm convergent and discriminant validity, confirmatory factor analysis and evaluation of the reliability were calculated. Statistical data and other data gathered from interviews suggest that the SHOMS will prove to be a useful tool for educators and researchers who wish to investigate HoM for a variety of participants.

year: 2012

title: From mainstream to manaaki: Indigenising our approach to immigration

authors: Kukutai, Tahu

abstract: In recent years, discontent with migration and migrants in the wealthy global north has manifested in disturbing ways: cue Brexit, xenophobia, border paranoia, far-right nationalism and its bedfellow white supremacy. On the surface, Aotearoa New Zealand appears to have escaped the uglier aspects of this nativism. Despite the grumblings of the New Zealand First Party, no serious popular or political anti-immigration movement has appeared, and racially motivated attacks against migrants are relatively rare. This is despite the fact that Aotearoa has a much higher relative foreign-born population share than the United States or United Kingdom,1 and ‘superdiverse’ Auckland – which comprises at least 40 per cent migrants – now has the ignominious claim to being the fourthleast affordable city in the world, far outstripping London and New York.

text: From mainstream to manaaki: Indigenising our approach to immigration In recent years, discontent with migration and migrants in the wealthy global north has manifested in disturbing ways: cue Brexit, xenophobia, border paranoia, far-right nationalism and its bedfellow white supremacy. On the surface, Aotearoa New Zealand appears to have escaped the uglier aspects of this nativism. Despite the grumblings of the New Zealand First Party, no serious popular or political anti-immigration movement has appeared, and racially motivated attacks against migrants are relatively rare. This is despite the fact that Aotearoa has a much higher relative foreign-born population share than the United States or United Kingdom,1 and ‘superdiverse’ Auckland – which comprises at least 40 per cent migrants – now has the ignominious claim to being the fourthleast affordable city in the world, far outstripping London and New York.

year: 2017