Malcolm Clark - Academia.edu (original) (raw)
Papers by Malcolm Clark
Processes for the treatment of a waste water having a high pH and/or alkalinity
Trace Metals in Brisbane River Estuary Sediments and Port of Brisbane Corporation Reclamation Paddocks
Novel Applications for Oxalate-Phosphate-Amine Metal-Organic-Frameworks (OPA-MOFs): Can an Iron-Based OPA-MOF Be Used as Slow-Release Fertilizer?
PloS one, 2015
A porous iron-based oxalate-phosphate-amine metal-organic framework material (OPA-MOF) was invest... more A porous iron-based oxalate-phosphate-amine metal-organic framework material (OPA-MOF) was investigated as a microbially-induced slow-release nitrogen (N) and phosphorus (P) fertilizer. Seedling growth, grain yields, nutrient uptake of wheat plants, and soil dynamics in incubated soil, were investigated using OPA-MOF vs standard P (triple-superphosphate) and N (urea) fertilizers in an acidic Ferralsol at two application rates (equivalent 120 and 40 kg N ha-1). While urea hydrolysis in the OPA-MOF treatment was rapid, conversion of ammonium to nitrate was significantly inhibited compared to urea treatment. Reduced wheat growth in OPA-MOF treatments was not caused by N-deficiency, but by limited P-bioavailability. Two likely reasons were slow P-mobilisation from the OPA-MOF or rapid P-binding in the acid soil. P-uptake and yield in OPA-MOF treatments were significantly higher than in nil-P controls, but significantly lower than in conventionally-fertilised plants. OPA-MOF showed poten...
Geochemical partitioning of heavy metals in bottom sediments of the Brisbane River estuary
Geological contribution to environmental management issues: case studies in the biological, hydrological and geological environments in northeast New South Wales and southeast Queensland
Environmental Geology, 2001
Surface water samples from the Drake mining area show elevated metal concentrations, notably cadm... more Surface water samples from the Drake mining area show elevated metal concentrations, notably cadmium, iron and zinc. A detailed study of a sphalerite /quartz vein from Strauss Pit and chalcopyrite and pyrite from the Adeline mine and Strauss Pit indicate that micro-scale analyses of ores are necessary for environmental management of mine sites. Analyses show that Cd is elevated, up to 2.1 % by weight, and is associated with sphalerite, replacing Zn, or to a lesser extent replacing Pb within small galena grains. High concentrations of Cu are also associated with the Strauss Pit ore as small chalcopyrite grains along the margins of the sphalerite vein, within the central quartz zone of the vein system, and as replacement rims on sphalerite grains. Chalcopyrite from the Adeline mine area, is by comparison, metal poor, but still contains elevated heavy metal concentrations. Whereas, pyrite and chalcopyrite, from Strauss Pit have variable heavy metal concentrations, with chalcopyrite from within sphalerite veins having higher Cd and Zn concentrations than chalcopyrite distal to the veins. Cadmium and other heavy metals within the ores are mobilised during sulphide weathering and enter the drainage network; precipitation of secondary oxidation minerals act as temporary stores for many heavy metals. The complexity of the mineral and heavy metal associations at Strauss Pit suggest that a detailed knowledge of these associations and distributions within ore bodies, and associated waste rocks, are needed by environmental managers of mine sites because the presence of havy metals may greatly affect the decision making process, and management strategies employed.
Porous particulate material for fluid treatment, cementitious composition and method of manufacture thereof
Effects of Bauxsol on the immobilisation of soluble acid and environmentally significant metals in acid sulfate soils
Australian Journal of Soil Research, Aug 15, 2002
Page 1. P ublishing Australian Journal of Soil Research CSIRO Publishing PO Box 1139 (150 Oxford ... more Page 1. P ublishing Australian Journal of Soil Research CSIRO Publishing PO Box 1139 (150 Oxford St) Collingwood, Vic. 3066, Australia Telephone: +61 3 9662 7628 Fax: +61 3 9662 7611 Email: publishing.sr@csiro.au Published ...
Mangrove forests as a buffer zone between anthropogenically polluted areas and the sea
Processes and Compositions for Water Treatment
The use of red mud from bauxite refineries in the treatment of acid sulphate soils
The nature of Quaternary sediments at Wynnum, Brisbane
Recent sedimentary data for the Wynnum (Brisbane) area are presented. Radio-carbon dates suggest ... more Recent sedimentary data for the Wynnum (Brisbane) area are presented. Radio-carbon dates suggest that active sedimentation started at least 2660±70 yrs Bp at a slow rate that increased as water depth shallowed. These marginal marine sediments are part of the Brisbane Rivers bird-foot delta and contain many overlapping channel deposits, erosional surfaces, and a fining upwards sedimentary sequence. This deltaic sediments unconformably overlie an extensively weathered tertiary basalt. Weathering of this basalt has most likely occurred sub-aerially under climatic conditions similar to those found presently, prior to inundation by the last sea level high some 6500 yrs before present.
What does your TSA reading mean?
Trace Metals in Brisbane River Estuary Sediments and Port of Brisbane Corporation Reclamation Paddocks
Riverbank Stability Along the Richmond River Between the Railway Bridge and the Queen Elizabeth Park Footbridge, Casino, N.S.W
In-situ development of acid sulphate soil within a mangrove forest, at Wynnum, Queensland
The geochemistry of the sediment-water system in the red mud dam at the Queensland Alumina Refinery
9. Chromium Reduible sulfur. S
New treatments for the old problems of acid mine drainage and sulphidic mine tailings storage
Science of The Total Environment
An integrated selective extraction and size normalisation procedure for use in metal partitioning... more An integrated selective extraction and size normalisation procedure for use in metal partitioning and diagenetic studies of anoxic sediments and soils is presented. Data obtained by this procedure can readily be combined with other primary data (e.g. sulphur concentrations, carbonate concentrations, cation exchange capacity, etc.) and derived parameters (e.g. degrees of pyritisation and sulphidisation) that enhance interpretation of the behaviour of trace metals in anoxic sediments. Achieving size normalisation during extraction, allows direct comparison of sediments from dissimilar sedimentary environments, and simplifies assessment of the processes that determine whether a sediment is a source of or a sink for trace metals. Aspects of a study of trace metals in sediments from the Brisbane River estuary, Australia, are used to illustrate applications of the integrated procedure.
Processes for the treatment of a waste water having a high pH and/or alkalinity
Trace Metals in Brisbane River Estuary Sediments and Port of Brisbane Corporation Reclamation Paddocks
Novel Applications for Oxalate-Phosphate-Amine Metal-Organic-Frameworks (OPA-MOFs): Can an Iron-Based OPA-MOF Be Used as Slow-Release Fertilizer?
PloS one, 2015
A porous iron-based oxalate-phosphate-amine metal-organic framework material (OPA-MOF) was invest... more A porous iron-based oxalate-phosphate-amine metal-organic framework material (OPA-MOF) was investigated as a microbially-induced slow-release nitrogen (N) and phosphorus (P) fertilizer. Seedling growth, grain yields, nutrient uptake of wheat plants, and soil dynamics in incubated soil, were investigated using OPA-MOF vs standard P (triple-superphosphate) and N (urea) fertilizers in an acidic Ferralsol at two application rates (equivalent 120 and 40 kg N ha-1). While urea hydrolysis in the OPA-MOF treatment was rapid, conversion of ammonium to nitrate was significantly inhibited compared to urea treatment. Reduced wheat growth in OPA-MOF treatments was not caused by N-deficiency, but by limited P-bioavailability. Two likely reasons were slow P-mobilisation from the OPA-MOF or rapid P-binding in the acid soil. P-uptake and yield in OPA-MOF treatments were significantly higher than in nil-P controls, but significantly lower than in conventionally-fertilised plants. OPA-MOF showed poten...
Geochemical partitioning of heavy metals in bottom sediments of the Brisbane River estuary
Geological contribution to environmental management issues: case studies in the biological, hydrological and geological environments in northeast New South Wales and southeast Queensland
Environmental Geology, 2001
Surface water samples from the Drake mining area show elevated metal concentrations, notably cadm... more Surface water samples from the Drake mining area show elevated metal concentrations, notably cadmium, iron and zinc. A detailed study of a sphalerite /quartz vein from Strauss Pit and chalcopyrite and pyrite from the Adeline mine and Strauss Pit indicate that micro-scale analyses of ores are necessary for environmental management of mine sites. Analyses show that Cd is elevated, up to 2.1 % by weight, and is associated with sphalerite, replacing Zn, or to a lesser extent replacing Pb within small galena grains. High concentrations of Cu are also associated with the Strauss Pit ore as small chalcopyrite grains along the margins of the sphalerite vein, within the central quartz zone of the vein system, and as replacement rims on sphalerite grains. Chalcopyrite from the Adeline mine area, is by comparison, metal poor, but still contains elevated heavy metal concentrations. Whereas, pyrite and chalcopyrite, from Strauss Pit have variable heavy metal concentrations, with chalcopyrite from within sphalerite veins having higher Cd and Zn concentrations than chalcopyrite distal to the veins. Cadmium and other heavy metals within the ores are mobilised during sulphide weathering and enter the drainage network; precipitation of secondary oxidation minerals act as temporary stores for many heavy metals. The complexity of the mineral and heavy metal associations at Strauss Pit suggest that a detailed knowledge of these associations and distributions within ore bodies, and associated waste rocks, are needed by environmental managers of mine sites because the presence of havy metals may greatly affect the decision making process, and management strategies employed.
Porous particulate material for fluid treatment, cementitious composition and method of manufacture thereof
Effects of Bauxsol on the immobilisation of soluble acid and environmentally significant metals in acid sulfate soils
Australian Journal of Soil Research, Aug 15, 2002
Page 1. P ublishing Australian Journal of Soil Research CSIRO Publishing PO Box 1139 (150 Oxford ... more Page 1. P ublishing Australian Journal of Soil Research CSIRO Publishing PO Box 1139 (150 Oxford St) Collingwood, Vic. 3066, Australia Telephone: +61 3 9662 7628 Fax: +61 3 9662 7611 Email: publishing.sr@csiro.au Published ...
Mangrove forests as a buffer zone between anthropogenically polluted areas and the sea
Processes and Compositions for Water Treatment
The use of red mud from bauxite refineries in the treatment of acid sulphate soils
The nature of Quaternary sediments at Wynnum, Brisbane
Recent sedimentary data for the Wynnum (Brisbane) area are presented. Radio-carbon dates suggest ... more Recent sedimentary data for the Wynnum (Brisbane) area are presented. Radio-carbon dates suggest that active sedimentation started at least 2660±70 yrs Bp at a slow rate that increased as water depth shallowed. These marginal marine sediments are part of the Brisbane Rivers bird-foot delta and contain many overlapping channel deposits, erosional surfaces, and a fining upwards sedimentary sequence. This deltaic sediments unconformably overlie an extensively weathered tertiary basalt. Weathering of this basalt has most likely occurred sub-aerially under climatic conditions similar to those found presently, prior to inundation by the last sea level high some 6500 yrs before present.
What does your TSA reading mean?
Trace Metals in Brisbane River Estuary Sediments and Port of Brisbane Corporation Reclamation Paddocks
Riverbank Stability Along the Richmond River Between the Railway Bridge and the Queen Elizabeth Park Footbridge, Casino, N.S.W
In-situ development of acid sulphate soil within a mangrove forest, at Wynnum, Queensland
The geochemistry of the sediment-water system in the red mud dam at the Queensland Alumina Refinery
9. Chromium Reduible sulfur. S
New treatments for the old problems of acid mine drainage and sulphidic mine tailings storage
Science of The Total Environment
An integrated selective extraction and size normalisation procedure for use in metal partitioning... more An integrated selective extraction and size normalisation procedure for use in metal partitioning and diagenetic studies of anoxic sediments and soils is presented. Data obtained by this procedure can readily be combined with other primary data (e.g. sulphur concentrations, carbonate concentrations, cation exchange capacity, etc.) and derived parameters (e.g. degrees of pyritisation and sulphidisation) that enhance interpretation of the behaviour of trace metals in anoxic sediments. Achieving size normalisation during extraction, allows direct comparison of sediments from dissimilar sedimentary environments, and simplifies assessment of the processes that determine whether a sediment is a source of or a sink for trace metals. Aspects of a study of trace metals in sediments from the Brisbane River estuary, Australia, are used to illustrate applications of the integrated procedure.