CAJ | 학술논문

在研究水玻璃模数、水玻璃添加量、偏高岭土掺量对固硫灰基地聚合物抗压强度影响的基础上，进一步探讨了固硫灰基地聚合物固化含铬污泥的性能及机制。固硫灰制备地聚合物的优化实验参数为：水玻璃模数M为2.5，水玻璃掺比为33.3%，偏高岭土掺比为20%。含铬污泥最大固化量为52%，固化体28 d抗压强度达到6.5 MPa，总铬及Cr(VI)浸出量分别为0.37 mg/L和5.93×10-3 mg/L，远低于GB 5085.3-2007标准限值。XRD和SEM/EDS分析表明含铬污泥及其固化体均为无定形态，污泥中的铬可能以物理包裹的形式被固化于地聚合物凝胶相中。IR分析表明铬元素可能通过化学键的形式进入地聚合物的三维网络结构实现固化。
재연구수파리모수、수파리첨가량、편고령토참량대고류회기지취합물항압강도영향적기출상，진일보탐토료고류회기지취합물고화함락오니적성능급궤제。고류회제비지취합물적우화실험삼수위：수파리모수M위2.5，수파리참비위33.3%，편고령토참비위20%。함락오니최대고화량위52%，고화체28 d항압강도체도6.5 MPa，총락급Cr(VI)침출량분별위0.37 mg/L화5.93×10-3 mg/L，원저우GB 5085.3-2007표준한치。XRD화SEM/EDS분석표명함락오니급기고화체균위무정형태，오니중적락가능이물리포과적형식피고화우지취합물응효상중。IR분석표명락원소가능통과화학건적형식진입지취합물적삼유망락결구실현고화。
The effects of modulus and quantity of sodium silicate, content of metakaolinite on the compressive strength of CFBC ash-based geopolymer was explored. At the same time, the property and mechanism of geopolymer solidifying chromium in sludge was investigated. That the modulus of sodium silicate was 2.5, quantity of sodium silicate was 33.3% and content of metakaolinite was 20% were the optimum parameters to prepare CFBC ash-based geopolymer. The content of sludge in solidiifed body was up to 52% and the compressive strength of solidiifed body which had been cured under normal temperature up to 6.5 MPa eventually. At the same time the leaching amount of total chromium and hexavalent chromium were far below the national standard value (GB 5085.3-2007). XRD and SEM/EDS analysis showed that the sludge and its solidiifed body were amorphous. The chromium in sludge might be physical encapsulated in the amorphous geopolymer gel. Iinfrared spectrometry (IR) indicated that chromium may be cured through going into the three-dimensional network structure as chemical bonds.