环保科技
環保科技
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ENVIRONMENTAL PROTECTION AND TECHNOLOGY
2015年
4期
1-5,10
,共6页
水系覆盖%粉煤灰%垃圾渗滤液%煤矸石%原位控制
水繫覆蓋%粉煤灰%垃圾滲濾液%煤矸石%原位控製
수계복개%분매회%랄급삼려액%매안석%원위공제
water cove%fly ash%landfill leachate%coal gangue%situ control
为评价水系覆盖对富硫煤矸石污染物质溶出的控制效果，采用天然水、粉煤灰浆液、垃圾渗滤液分别设置为对照、碱性水系覆盖、有机水系覆盖3种方式对富硫煤矸石进行浸没处理，处理周期1.5 a。结果表明：天然水对照处理上覆水样中有较低的pH（2.5～4.0）、较高的EC、Eh，同时富含Fe、Mn、Cu、Zn等金属离子及SO2-4和F-等阴离子，呈现出矿山酸性废水的一般特征。相对对照处理，碱性水系覆盖和有机水系覆盖处理上覆水样中有较高的pH（中性偏碱）和相对较低的Eh，能极显著降低上覆水样中的Fe、Mn、Zn、Cu的溶出，同时对SO2-4和F-也有明显的抑制效果。两种水系覆盖上覆水样中的溶出离子并没有显著性差异，但碱性水系覆盖对于金属离子的溶出表现出更好的控制效果。因此，碱性水系覆盖和有机水系覆盖等水系覆盖处理技术是一种可用于富硫煤矸石污染原位控制的有效途径。
為評價水繫覆蓋對富硫煤矸石汙染物質溶齣的控製效果，採用天然水、粉煤灰漿液、垃圾滲濾液分彆設置為對照、堿性水繫覆蓋、有機水繫覆蓋3種方式對富硫煤矸石進行浸沒處理，處理週期1.5 a。結果錶明：天然水對照處理上覆水樣中有較低的pH（2.5～4.0）、較高的EC、Eh，同時富含Fe、Mn、Cu、Zn等金屬離子及SO2-4和F-等陰離子，呈現齣礦山痠性廢水的一般特徵。相對對照處理，堿性水繫覆蓋和有機水繫覆蓋處理上覆水樣中有較高的pH（中性偏堿）和相對較低的Eh，能極顯著降低上覆水樣中的Fe、Mn、Zn、Cu的溶齣，同時對SO2-4和F-也有明顯的抑製效果。兩種水繫覆蓋上覆水樣中的溶齣離子併沒有顯著性差異，但堿性水繫覆蓋對于金屬離子的溶齣錶現齣更好的控製效果。因此，堿性水繫覆蓋和有機水繫覆蓋等水繫覆蓋處理技術是一種可用于富硫煤矸石汙染原位控製的有效途徑。
위평개수계복개대부류매안석오염물질용출적공제효과，채용천연수、분매회장액、랄급삼려액분별설치위대조、감성수계복개、유궤수계복개3충방식대부류매안석진행침몰처리，처리주기1.5 a。결과표명：천연수대조처리상복수양중유교저적pH（2.5～4.0）、교고적EC、Eh，동시부함Fe、Mn、Cu、Zn등금속리자급SO2-4화F-등음리자，정현출광산산성폐수적일반특정。상대대조처리，감성수계복개화유궤수계복개처리상복수양중유교고적pH（중성편감）화상대교저적Eh，능겁현저강저상복수양중적Fe、Mn、Zn、Cu적용출，동시대SO2-4화F-야유명현적억제효과。량충수계복개상복수양중적용출리자병몰유현저성차이，단감성수계복개대우금속리자적용출표현출경호적공제효과。인차，감성수계복개화유궤수계복개등수계복개처리기술시일충가용우부류매안석오염원위공제적유효도경。
The control effectiveness of water covers on coal gangue contamination were evaluated in the test. Sulfur-rich coal gangues were treated with three immersion approaches:mixing tap water, fly ash slurry and landfill leachate as control,alkaline water cover and organic water cover. The re-sults suggested that the lying water in control group had lower pH,higher EC and Eh and was rich in metal ions such as Fe,Mn,Cu and Zn,anions like SO2-4 and F-,presenting general characteristics of acid mine drainage. Compared to the control group,the lying water samples of alkaline water cover and organic water cover showed higher pH and lower Eh after one and half years. The release of Fe, Mn,Zn and Cu were reduced significantly,SO2-4 and F- were also restrained obviously in the mean-time. The leaching ions in lying water of these two water covers had no significant difference,but al-kaline water cover displayed better control effect on the release of metal ions. Hence water cover technique of alkaline water cover and organic water cover is an effective ways of situ control on sulfur-rich coal gangue contamination.
