【摘要】：礦山廢石堆體內(nèi)部酸堿性變化對(duì)治理礦山廢石堆體引起的污染有重要指導(dǎo)意義。本文以磷礦廢石和煤矸石為例,開(kāi)展XRD和中和能力(ANC/BNC)測(cè)定試驗(yàn),依據(jù)試驗(yàn)結(jié)果推算出100年后磷礦廢石堆體和煤矸石堆體內(nèi)的酸堿性。結(jié)果表明,1kg磷礦廢石需0.~(206)mol HNO_3使之中和,磷礦廢石對(duì)酸具有較強(qiáng)的緩沖能力,100年內(nèi)酸雨(p H≈4.5)提供的H+不足以中和磷礦廢石中堿性物質(zhì),堆體內(nèi)部水分的p H值將長(zhǎng)期維持在自然p H條件(p H≈8.6);煤矸石堆體內(nèi)部呈酸性(p H≈6.6),1kg煤矸石需0.053mol Na OH使之中和,在酸雨的作用下,廢水的酸性會(huì)逐漸增強(qiáng),采用投加堿性中和劑方法能夠處理煤矸石產(chǎn)生的酸性廢水。
[Abstract]:The change of acid and alkalinity in mine waste rock heap has important guiding significance for controlling the pollution caused by mine waste rock heap. Taking phosphate rock waste rock and coal gangue as an example, the determination of XRD and neutralization capacity (ANC/BNC) was carried out in this paper. According to the test results, the acidity and alkalinity of phosphate rock waste rock and coal gangue heap after 100 years were calculated. The results show that the 1kg phosphate rock waste rock needs to be neutralized by 0.206 mol HNO_3, and the phosphate rock waste rock has a strong buffering ability to acid. Within 100 years, the H supplied by acid rain (p H 鈮，

本文編號(hào)：2460437