CAJ | 학술논문

测定了垃圾焚烧飞灰中Zn、Pb、Cu、Cr、Ni的浸出率与pH值的关系,并利用MINTEQA2模型进行了浸出规律模拟.结果表明:Pb、Cu、Zn、Cr、Ni的模拟浸出值与实测浸出值基本吻合,模拟浸出值可反映实际浸出情况;pH<2时,Zn、Cu、Pb的浸出率较大,8<pH<12时浸出率接近0;Zn、Pb的浸出率分别在pH<7、pH<2时达到最大值,最大值分别约为75%及72%,pH值>12时随pH值的增加,其浸出率逐渐增强;Cr在pH<4时浸出率较大,最大浸出率达43%,4<pH<12时浸出率接近零,pH>12时其浸出率再次增加;Ni的浸出率在pH<2时随pH值的增加而降低,2<pH<13时其浸出率接近零.
측정료랄급분소비회중Zn、Pb、Cu、Cr、Ni적침출솔여pH치적관계,병이용MINTEQA2모형진행료침출규률모의.결과표명:Pb、Cu、Zn、Cr、Ni적모의침출치여실측침출치기본문합,모의침출치가반영실제침출정황;pH<2시,Zn、Cu、Pb적침출솔교대,8<pH<12시침출솔접근0;Zn、Pb적침출솔분별재pH<7、pH<2시체도최대치,최대치분별약위75%급72%,pH치>12시수pH치적증가,기침출솔축점증강;Cr재pH<4시침출솔교대,최대침출솔체43%,4<pH<12시침출솔접근령,pH>12시기침출솔재차증가;Ni적침출솔재pH<2시수pH치적증가이강저,2<pH<13시기침출솔접근령.
Leaching behavior of Zn, Pb, Cu, Cr and Ni as a function of pH was analyzed based on the leaching ratios at different pH derived from measurement and MinTEQA2 modeling. It was found that measured leaching ratios were essentially consistent with those derived from MinTEQA2 modeling, indicating that the latter could represent actual leaching behavior. Leaching ratios of Zn, Cu and Pb were relatively high when pH was less than 2, and stood close to zero at pH between 8 and 12. Leaching ratios of Zn and Pb reached peak value of 75% and 72% at pH less than 7 and 2 respectively, and rose with the increase of pH over 12. Leaching ratios of Cr, with the peak value registering 43% at pH less than 4, were close to zero at pH between 4 and 12, and increased again at pH exceeding 12. Leaching ratios of Ni decreased with increase of pH from 0 to 2, and stood close to zero at pH spanning 2 and 13.