anaerobic digestion of sewage sludge aerobic biological treatment of effluent. 4.10.1.4 The Earth’s resources of Evaluate alternative 1 Extended writing: Research information for Video clip (HT only) metal ores are limited. biological methods of describe the processes of the processes of: YouTube: extraction, given Copper ores are becoming appropriate information. phytomining phytomining scarce and new ways of bioleaching. bioleaching. extracting copper from ores include Evaluate the impacts and Include percentage of phytomining and benefits of biological metal extracted, bioleaching. These methods of extracting concentration of global methods avoid traditional warming gases released, mining methods of digging, amount of electricity used moving and disposing of etc. large amounts of rock. Use this data in an evaluation. Phytomining uses plants to absorb metal compounds. It may be possible to The plants are harvested model phytomining in the and then burned to laboratory by watering produce ash that contains geraniums with dilute metal compounds. copper sulphate for a period of time. The Bioleaching uses bacteria leaves can be burnt and to produce leachate copper can be extracted solutions that contain metal from the ash by rinsing in compounds. dilute hydrochloric acid and electrolysing the The metal compounds can solution. be processed to obtain the metal. For example,
anaerobic digestion of sewage sludge aerobic biological treatment of effluent. 4.10.1.4 (HT only) The Earth’s resources of metal ores are limited. Copper ores are becoming scarce and new ways of extracting copper from ores include phytomining and bioleaching. These methods avoid traditional mining methods of digging, moving and disposing of large amounts of rock. Phytomining uses plants to absorb metal compounds. The plants are harvested and then burned to produce ash that contains metal compounds. Bioleaching uses bacteria to produce leachate solutions that contain metal compounds. The metal compounds can be processed to obtain the metal. For example, Evaluate alternative biological methods of extraction, given appropriate information. 1 Extended writing: describe the processes of phytomining bioleaching. Evaluate the impacts and benefits of biological methods of extracting Research information for the processes of: phytomining bioleaching. Include percentage of metal extracted, concentration of global warming gases released, amount of electricity used etc. Use this data in an evaluation. It may be possible to model phytomining in the laboratory by watering geraniums with dilute copper sulphate for a period of time. The leaves can be burnt and copper can be extracted from the ash by rinsing in dilute hydrochloric acid and electrolysing the solution. Video clip YouTube:
AQA-8462-SOW-RES.DOCX