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Group 1-16
Project Title Synthesis of Mono-Calcium Phosphate and evaluating its potential as a plant fertilizer

Mono-calcium phosphate (MCP) is a substance which has many uses such as being used as baking powder, fertilizer, firming agent and phosphate feed supplement. However, the current method of synthesizing MCP involves the reaction between phosphate rock and phosphoric acid which causes environmental damage because it produces toxic gases such as hydrogen fluoride. Hence the current study proposes to synthesize MCP using a more environmentally method, by replacing phosphate rock with blood cockle shells which have a high content of calcium carbonate and thus could potentially react with phosphoric acid to yield MCP. To determine the optimum volume of phosphoric acid and mass of cockle shell to obtain the maximum yield of MCP, reactions using different volumes of phosphoric acid were carried out. Results show that 5g of blood cockle shell reacted with 50 ml of 2M phosphoric acid to produce the greatest yield of MCP. Heating duration of more than 30 minutes results in a lower yield of MCP. The MCP synthesised contained 25-27% phosphorus and 21-23% of calcium content and was also found to have a positive effect on plant growth, increasing plant height by 47%, fresh weigh by 46% and dry weight by 33%. Hence, blood cockle shell waste is a viable green alternative to the conventional phosphate rocks in the production of MCP.

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Team Members
(Names & Classes)
Group Leader:
Wang Rui Jie (3S2)
Group Members:
Bryan Tan Wen Qiang (3S2)
Jason Niow Jia Sheng (3S2)