Research Progress in Remediation of Heavy Metal Pollution in Lead-zinc Mines by Phosphorous-based Materials
Lead-Zinc mine is a typical non-ferrous metal mine.It is easy to produce heavy metal pollution during mining activity.Previous researches have showed phosphorous based materials have good remedia-tion effect on heavy metal pollution formed in lead-zinc ore.Remediation of heavy metals by phosphorous based material is summarized systematically in this paper.All phosphorous based substance can be divided into natural and artificial substances,according to its source.The mechanisms of remediation of Pb by phos-phorous based substance include adsorption,surface coordination and precipitation,mainly precipitation.The main mechanisms of remediation of Cd by phosphorous based substance are surface complexation and co-precipitation,and higher pH value makes Cd more likely to precipitate.Surface coordination,ion exchange and formation of amorphous materials are the main mechanisms of Zn,Cu and Ni remediation.There are many factors affecting the remediation of heavy metals pollution in lead-zinc tailings by phophorous based materials,and the modes of the influence are also very complex,including various cations and anions,pH value,the form and amount of phosphorous-containing substances,the form and initial concentration of heavy metals,etc.Different phosphorous based substance showed the complexity of the influence factors on remediation to heavy metal pollution,which was related to the diversity of phophorous based substances and their properties.At present,the research on remediation of heavy metals pollution in lead-zinc ore by phosphorous based substances is still concentrated on the theoretical research,the practical application is slightly insufficient.In the future,the influencing factors of remediation effect and micro-interfacial proesses about heavy metal and phosphorous based substance need to be further researched,and practical promotion and application should be increased.
Phosphorous-based materialsRemediation of heavy metal pollutionLead-zinc minesPb-Zn-Cd-Cu heavy metal
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