羟基磷酸钙的制备及其在重金属修复中的应用
毕业论文关键词： 羟基磷酸钙；土壤重金属；化学固定修复
The preparation of hydroxy calcium phosphate and its application in the repair of heavy metals
Abstract: Heavy metals from contaminated soil contained in the composition and characteristics of soil heavy metal elements in the lead, cadmium, mercury on plants, animals, and nature is the harm to human body caused by food chain. Discussed in order to reduce pollution and the ecological environment of health hazards, each field of research of various physical methods of repair, chemical remediation, bioremediation, how to reduce soil heavy metal concentration in the eligibility criteria or cleared, but also introduced processing method of heavy metals in soil. The current repair methods have more or less secondary pollution this problem, at the same time some methods cost is higher, are not suitable for wide use, need to research and development a no secondary pollution, and low cost method of repair. This project study by using hydroxy calcium phosphate, phosphoric acid and calcium hydroxide reaction preparation and hydroxy calcium phosphate chemical fixed prosthesis preparations for heavy metal, and thiourea compound, used in heavy metal pollution in soil, the soil heavy metals in fixed prosthesis research, has obtained the good experimental effect.
Key words: Hydroxy calcium phosphate; Heavy metal; Chemical remediation methods
目 录
1 绪论 1
1.1 重金属的性质及危害 1
1.2 土壤重金属修复研究进展 2
1.3 国内、外土壤重金属修复研究及成果 4
1.3.1 国内土壤重金属修复研究及成果 4
1.3.2 国外土壤重金属修复研究及成果 6
1.4 课题研究意义、目的 7
2 实验部分 9
2.1 实验试剂和仪器 9
2.1.1 实验主要原料及试剂 9
2.1.2 实验主要设备 9
2.2 实验内容及装置 9
2.2.1 羟基磷酸钙的配制 9
2.2.2 羟基磷酸钙对重金属溶液的应用 10
2.3 羟基磷酸钙及其应用的表征方法 11
2.3.1 羟基磷酸钙的钙、磷含量测定 11
2.3.2 羟基磷酸钙对土壤的应用表征分析 11
2.3.3 电感耦合等离子体发射光谱仪 13
3 实验结果与讨论 16
3.1 羟基磷酸钙的分析 16
3.1.1 羟基磷酸钙对重金属的固化作用 16
3.2 制备羟基磷酸钙的影响因素 18
3.3 羟基磷酸钙对重金属溶液的应用分析 18
3.4 羟基磷酸钙对重金属土壤的影响分析 22
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