Carbothermal Upgrading of the Awaso Bauxite Ore using Waste Pure Water Sachets as Reductant*

Waste Pure Water Sachets (PWS) are currently among the fastest growing solid wastes generated in Ghana. Government’s attempt at banning its production and usage has been thwarted by the realisation that such a measure will increase the unemployment rate since the sachet water business employs a significant proportion of people. Meanwhile, the country currently exports its bauxite raw, without any value addition. Gradual depletion of high grade bauxite (with high alumina content) and the emergence of low grade bauxite with high iron oxide content calls for novel and inexpensive ways to upgrade these low ores. This project investigates a simple way of generating carbonaceous materials from PWS and their subsequent utilisation as reductants in the carbothermal upgrading of the Ghana Awaso bauxite. Samples of PWS were heat-treated in the temperature range 130-180 °C and the resulting molten material was cooled to render it brittle. The brittle mass was then pulverised and characterised by XRD and SEM. Composite pellets of bauxite sample and pulverised PWS were then formed, oven dried, placed in a fireclay crucible and heated in a gas-fired furnace. The magnetic fraction after reduction was separated by a Low Intensity Magnet and weighed. XRD analyses of the pulverised PWS showed peaks identical to those of high density polyethylene (HDPE). It was further observed that after about 30 min of firing, a large portion of the sample could be attracted by the magnet, indicating the suitability of the waste polymer as an important carbonaceous material for bauxite upgrading. The use of PWS as reductant prevented the formation of hercynite (FeAl2O4).Keywords: Pure water sachets, Bauxite, Gas-fired furnace, Magnetic fraction, High density polyethylen

Carbothermal Upgrading of the Awaso Bauxite Ore using Sawdust and Coconut Shells as Reductant

Ghana’s bauxite is exported in the raw state with no value addition. One way to achieve value addition is to carbothermally upgrade the ore into magnetic and nonmagnetic fractions, followed by separation using a magnet. This work investigates the carbothermal upgrading of the Awaso bauxite ore using reductant generated from locally available saw dust (SD) and coconut shells (CNS). Composite pellets of bauxite-reductant were prepared, air-dried and cured for 72 hours. The cured pellets were placed in a fire-clay crucible and heated in a custom-made gas-fired furnace for 30 minutes. The fired composite pellets were separated into magnetic and non-magnetic portions using a low intensity hand-held magnet. The various portions were then characterised using XRD, XRF and SEM analyses. XRD results showed magnetite as the predominant species present in the magnetic fraction whilst the non-magnetic fraction showed alumina as the predominant peaks along with some traces of unreduced hematite, silica, carbon and titania but no hercynite.  Keywords: Bauxite, Palm Nut Shells, Gas-Fired Furnace, Hercynite, Cha

On the Empirics of Institutions and Quality of Growth: Evidence for Developing Countries

We explore a newly available dataset on quality of growth to investigate the effect of institutions on growth quality in 93 developing countries for the period 1990 to 2011. Quality of institutions is measured in term of political risk. The empirical evidence is based on: (i) Ordinary Least Squares (OLS) and Two Stage Least Squares (2SLS) and (ii) cross-sectional and panel data structures. In order to avail room for more policy implications, the dataset is further disaggregated into income levels, namely: Lower middle income (LMIC), low income (LI) and upper middle income (UMIC). Three main findings are established. First, institutions are positively related to the quality of growth. Second, institutions have significantly contributed to growth quality in increasing order during the following time intervals: 2005-2011, 1995-1999 and 2000-2004. Third, the positive nexus between institutions and growth quality is fundamentally driven by LMIC. Policy implications are discussed

Enabling trade in Gene-Edited produce in Asia and Australasia: The developing regulatory landscape and future perspectives

Genome- or gene-editing (abbreviated here as ‘GEd’) presents great opportunities for crop improvement. This is especially so for the countries in the Asia-Pacific region, which is home to more than half of the world’s growing population. A brief description of the science of gene-editing is provided with examples of GEd products. For the benefits of GEd technologies to be realized, international policy and regulatory environments must be clarified, otherwise non-tariff trade barriers will result. The status of regulations that relate to GEd crop products in Asian countries and Australasia are described, together with relevant definitions and responsible regulatory bodies. The regulatory landscape is changing rapidly: in some countries, the regulations are clear, in others they are developing, and some countries have yet to develop appropriate policies. There is clearly a need for the harmonization or alignment of GEd regulations in the region: this will promote the path-to-market and enable the benefits of GEd technologies to reach the end-users

Worker remittances and the global preconditions of ‘smart development’

With the growing environmental crisis affecting our globe, ideas to weigh economic or social progress by the ‘energy input’ necessary to achieve it are increasingly gaining acceptance. This question is intriguing and is being dealt with by a growing number of studies, focusing on the environmental price of human progress. Even more intriguing, however, is the question of which factors of social organization contribute to a responsible use of the resources of our planet to achieve a given social result (‘smart development’). In this essay, we present the first systematic study on how migration – or rather, more concretely, received worker remittances per GDP – helps the nations of our globe to enjoy social and economic progress at a relatively small environmental price. We look at the effects of migration on the balance sheets of societal accounting, based on the ‘ecological price’ of the combined performance of democracy, economic growth, gender equality, human development, research and development, and social cohesion. Feminism in power, economic freedom, population density, the UNDP education index as well as the receipt of worker remittances all significantly contribute towards a ‘smart overall development’, while high military expenditures and a high world economic openness are a bottleneck for ‘smart overall development’