【摘要】：為評(píng)價(jià)煤矸石回填塌陷區(qū)后對(duì)水體影響,采用自行設(shè)計(jì)的新型淋溶裝置進(jìn)行連續(xù)168 h的淋溶實(shí)驗(yàn)。通過(guò)采用電感耦合等離子體質(zhì)譜儀(ICP-MS)和p H測(cè)試儀等相關(guān)分析儀器研究了煤矸石中重金屬在淋溶過(guò)程中的溶出規(guī)律,并對(duì)淋溶液的COD、BOD、TON、NH3-N和p H值進(jìn)行測(cè)試分析。結(jié)果顯示,淋溶反應(yīng)時(shí)間1~24 h時(shí),淋溶液的COD和BOD分別從28.001 1和4.400 0 mg·L-1升至36.437 29和6.191 525 mg·L-1,超過(guò)地表水環(huán)境質(zhì)量五類標(biāo)準(zhǔn)限值。在24~168 h的淋溶時(shí)間內(nèi),TON的值先降低至2.983 4 mg·L-1而后升高至8.494 6 mg·L-1,而在72~168 h內(nèi),淋溶液中TON呈線性趨勢(shì)大幅度增加。鉻元素溶出濃度的峰值主要發(fā)生在淋溶初期;鉛離子在24~72 h淋溶時(shí)間內(nèi),析出速度明顯加快;鋅離子溶解初期為慢速釋放,中期為快速釋放,末期為慢速釋放;銅離子在淋溶反應(yīng)開(kāi)始時(shí)溶出較少,而隨著淋溶反應(yīng)時(shí)間的延長(zhǎng),溶出速度增大。
[Abstract]:In order to evaluate the influence of coal gangue backfill collapse area on water body, a new leaching device designed by ourselves was used to carry out the leaching experiment for 168 hours. By means of inductively coupled plasma mass spectrometer (ICP-MS) and pH analyzer, the dissolution of heavy metals in coal gangue during leaching was studied, and the COD,BOD,TON,NH3-N and pH values of leaching solution were measured and analyzed. The results showed that the COD and BOD of leaching solution increased from 28.001 1 and 4.400 0 mg L -1 to 36.437 29 mg L -1 and 6.191 525 mg L -1 respectively, which exceeded the five standard limits of surface water quality. The concentration of ton decreased to 2.983 4 mg L -1 and then increased to 8.494 6 mg L -1 at 24 h after leaching, and the linear trend of TON in leaching solution increased significantly within 72 鈩，

本文編號(hào)：2223742