铅锌矿中锌元素对地质碳汇的影响研究

Influence of zinc in lead-zinc ore on geological carbon sink

为明确含硫铅锌矿中锌元素对地质碳汇(HCO_(3)^(-))的影响,以广西灵川县硫铅锌矿场为研究对象,开展室内实验模拟,通过改变水样、岩样和锌化合物含量来监测水中HCO_(3)^(-)的变化,对含硫铅锌矿中锌元素与HCO_(3)^(-)(地质碳汇)之间的变化情况进行分析。实验结果表明,铅锌矿中的锌元素会对地质碳汇(HCO_(3)^(-))产生影响,Zn^(2+)会抑制反应的发生,使HCO_(3)^(-)的含量减少;不同岩性对地质碳汇(HCO_(3)^(-))有一定影响,在矿粉中加入灰岩反应生成HCO_(3)^(-)的浓度会大于角岩生成HCO_(3)^(-)的浓度;样品在0.5 mg/L或1 mg/L ZnCl_(2)溶液中生成HCO_(3)^(-)的浓度比在超纯水中生成HCO_(3)^(-)的浓度低,且样品在1 mg/L ZnCl_(2)溶液中生成HCO_(3)^(-)的浓度更低,表明锌元素含量越高,对岩石的溶解抑制作用就越显著。本研究结果对于提高碳汇转化速率,为控制CO_(2)浓度提供了一种方法和科学依据。

In order to clarify the influence of zinc element in sulfur-containing lead-zinc ore on geological carbon sink(HCO_(3)^(-)),taking the sulfur-containing lead-zinc ore field in Lingchuan County,Guangxi as the research object,indoor experimental simulation was carried out to monitor the change of HCO_(3)^(-)in water by changing the content of water samples,rock samples and zinc compounds,and analyze the change between zinc element and HCO_(3)^(-)(Geological carbon sink)in sulfur-containing lead-zinc ore.The experimental results show that zinc in lead-zinc ore will affect the geological carbon sink(HCO_(3)^(-)),and Zn^(2+)will inhibit the reaction and reduce the content of HCO_(3)^(-);Different lithology has certain influence on geological carbon sink(HCO_(3)^(-)).The concentration of HCO_(3)^(-)generated by limestone reaction added to ore powder will be greater than that generated by hornstone;The concentration of HCO_(3)^(-)produced by the sample in 0.5 mg/L or 1mg/L ZnCl_(2)solution is lower than that in ultra pure water,and the concentration of HCO_(3)^(-)produced by the sample in 1 mg/L ZnCl_(2)solution is lower,indicating that the higher the content of zinc,the more significant the inhibition of rock dissolution.The results of this study provide a method and scientific basis for improving carbon sink conversion rate and Controlling CO_(2)concentration.