title: International tephra conference “Crossing New Frontiers: Tephra Hunt in Transylvania”, 24 June - 1 July, 2018, Moieciu de Sus, Romania.

authors: Lowe, David J.

abstract: The International Focus Group on Tephrochronology and Volcanism (INTAV) held an international tephra conference, “Crossing New Frontiers: Tephra Hunt in Transylvania”, at the spectacular mountain resort ‘Cheile Gradistei’ Fundata near Moieciu de Sus (Fig. 1), about 30 km southwest of the regional city of Braşov, in the southern Carpathian Mountains of Transylvania, Romania, from 24 June to 1 July, 2018. INTAV (which has operated previously under various names including COT, SCOTAV, and ICCT) is a global tephra research group active within the Stratigraphy and Chronology Commission (SACCOM) of INQUA since its initiation in 1961 (Kobayshi, 1965; Westgate and Gold, 1974; Lowe et al., 2011). It organises specialist tephra meetings every four years or so on average, although the most recent meeting (before this one in Romania) was held in 2010 in Kirishima, Japan (Holt and Lowe, 2010). The Romanian tephra meeting was convened by Daniel Veres (Romania) and Ulrich Hambach (Germany), together with support from the INTAV executive committee of Britta Jensen (Canada), Peter Abbott (UK/Switzerland), Takehiko Suzuki (Japan), Siwan Davies (UK), and David Lowe (New Zealand).

text: International tephra conference “Crossing New Frontiers: Tephra Hunt in Transylvania”, 24 June - 1 July, 2018, Moieciu de Sus, Romania. The International Focus Group on Tephrochronology and Volcanism (INTAV) held an international tephra conference, “Crossing New Frontiers: Tephra Hunt in Transylvania”, at the spectacular mountain resort ‘Cheile Gradistei’ Fundata near Moieciu de Sus (Fig. 1), about 30 km southwest of the regional city of Braşov, in the southern Carpathian Mountains of Transylvania, Romania, from 24 June to 1 July, 2018. INTAV (which has operated previously under various names including COT, SCOTAV, and ICCT) is a global tephra research group active within the Stratigraphy and Chronology Commission (SACCOM) of INQUA since its initiation in 1961 (Kobayshi, 1965; Westgate and Gold, 1974; Lowe et al., 2011). It organises specialist tephra meetings every four years or so on average, although the most recent meeting (before this one in Romania) was held in 2010 in Kirishima, Japan (Holt and Lowe, 2010). The Romanian tephra meeting was convened by Daniel Veres (Romania) and Ulrich Hambach (Germany), together with support from the INTAV executive committee of Britta Jensen (Canada), Peter Abbott (UK/Switzerland), Takehiko Suzuki (Japan), Siwan Davies (UK), and David Lowe (New Zealand).

year: 2018

title: Adsorption of Colour from Pulp and Paper Mill Wastewaters onto Diatomaceous Earths

authors: Carter, Shane Basil

subjects: Adsorption of colour

abstract: Abstract

Production of pulp and paper from raw wood involves the washing of substantial quantities of highly coloured material from the wood pulp. Although most of this colour is trapped within the mill and the mills wastewater treatment system, discharge of coloured wastewater remains a problem of public concern.

Lake Rotorua, New Zealand is filled with sediment consisting almost exclusively of diatoms. The most abundant species, Aulacoseira, has been shown to have very small pores, less than 200 nm, that could be very useful for the capture and holding of large organic molecules. Lake Rotorua is situated close to the two largest pulp and paper mills in New Zealand and may have to be dredged to solve a problem of eutrophication. Wastewaters generated at the Kinleith (Tokoroa) and Tasman (Kawerau) mills in the North island of New Zealand have been used to assess the characteristics of colour removal by Lake Rotorua diatoms.

Vacuum filtration through the diatoms succeeded in removing colour but proved to be impractically slow as an industrial process. Addition of diatoms to wastewater streams in stirred experiments showed that significant adsorption took place. The majority of the colour was removed within 30 seconds of mixing. The efficiency of colour removal was found to vary between wastewater streams within the mills. The pH dependency of this removal was tested and found to be most effective in a pH range of 3.6 to 5.

Attempts to reuse the diatoms showed that chemical backwash regimes were more effective than calcination.

This study concluded that surface silanols were likely to be the principle agent in forming coagulants with the colour material and were subsequently trapped on the diatom surfaces, but more importantly within the pores.

text: Adsorption of Colour from Pulp and Paper Mill Wastewaters onto Diatomaceous Earths Abstract

Production of pulp and paper from raw wood involves the washing of substantial quantities of highly coloured material from the wood pulp. Although most of this colour is trapped within the mill and the mills wastewater treatment system, discharge of coloured wastewater remains a problem of public concern.

Lake Rotorua, New Zealand is filled with sediment consisting almost exclusively of diatoms. The most abundant species, Aulacoseira, has been shown to have very small pores, less than 200 nm, that could be very useful for the capture and holding of large organic molecules. Lake Rotorua is situated close to the two largest pulp and paper mills in New Zealand and may have to be dredged to solve a problem of eutrophication. Wastewaters generated at the Kinleith (Tokoroa) and Tasman (Kawerau) mills in the North island of New Zealand have been used to assess the characteristics of colour removal by Lake Rotorua diatoms.

Vacuum filtration through the diatoms succeeded in removing colour but proved to be impractically slow as an industrial process. Addition of diatoms to wastewater streams in stirred experiments showed that significant adsorption took place. The majority of the colour was removed within 30 seconds of mixing. The efficiency of colour removal was found to vary between wastewater streams within the mills. The pH dependency of this removal was tested and found to be most effective in a pH range of 3.6 to 5.

Attempts to reuse the diatoms showed that chemical backwash regimes were more effective than calcination.

This study concluded that surface silanols were likely to be the principle agent in forming coagulants with the colour material and were subsequently trapped on the diatom surfaces, but more importantly within the pores.

year: 2007

title: Holding a mirror to society? Sociodemographic diversity within clinical psychology training programmes across Aotearoa.

authors: Scarf, Damian

subjects: Education, Medical

abstract: It has recently been demonstrated by Crampton et al that there has been a marked increase in the sociodemographic diversity of the University of Otago’s health professional programmes between 2010 and 2016.1 This change is evidenced by the fact that a historic 76 health professional Māori graduates crossed the Dunedin Town Hall stage in December 2018. A key driver of this change was the University of Otago’s Division of Health Sciences Mirror on Society selection policy. Here, by documenting the sociodemographic diversity of an equally important professional programme, clinical psychology, we highlight the need for similar selection policies to be implemented Aotearoa/New Zealand wide.

text: Holding a mirror to society? Sociodemographic diversity within clinical psychology training programmes across Aotearoa. It has recently been demonstrated by Crampton et al that there has been a marked increase in the sociodemographic diversity of the University of Otago’s health professional programmes between 2010 and 2016.1 This change is evidenced by the fact that a historic 76 health professional Māori graduates crossed the Dunedin Town Hall stage in December 2018. A key driver of this change was the University of Otago’s Division of Health Sciences Mirror on Society selection policy. Here, by documenting the sociodemographic diversity of an equally important professional programme, clinical psychology, we highlight the need for similar selection policies to be implemented Aotearoa/New Zealand wide.

year: 2019