CAJ | 학술논문

制备了一种矿物基多孔颗粒吸附材料( MPGM),用于净化富含重金属离子的石英纯化废水.通过BET、 SEM及FT-IR等技术分析表明,MPGM具有多孔径分布、大比表面积、低散失率等优良特性； N2吸附-脱附等温线为Ⅲ型,且存在H4型回滞环；官能团以层状硅酸盐矿物的基团为主.研究了吸附剂用量、初始pH值及时间对MPGM吸附Fe、 Zn、 Mn、 As的影响,结果表明,4种金属离子浓度分别由77.760、3.700、2.789和0.963 mg·L-1吸附净化为3.421、0.574、0.126和0.034 mg·L-1.对使用过的吸附材料利用1.0 mol·L-1的NaCl脱附12 h,重复利用5次后仍维持理想的吸附水平.吸附机制研究表明,吸附体系均符合Langmuir吸附等温线模型及准一级动力学模型/准二级动力学模型；△GY ﹤0、△HY ﹥0、△SY ﹥0,说明吸附过程为吸热反应,且在15~45℃温度下有利于反应顺利自发进行.
제비료일충광물기다공과립흡부재료( MPGM),용우정화부함중금속리자적석영순화폐수.통과BET、 SEM급FT-IR등기술분석표명,MPGM구유다공경분포、대비표면적、저산실솔등우량특성； N2흡부-탈부등온선위Ⅲ형,차존재H4형회체배；관능단이층상규산염광물적기단위주.연구료흡부제용량、초시pH치급시간대MPGM흡부Fe、 Zn、 Mn、 As적영향,결과표명,4충금속리자농도분별유77.760、3.700、2.789화0.963 mg·L-1흡부정화위3.421、0.574、0.126화0.034 mg·L-1.대사용과적흡부재료이용1.0 mol·L-1적NaCl탈부12 h,중복이용5차후잉유지이상적흡부수평.흡부궤제연구표명,흡부체계균부합Langmuir흡부등온선모형급준일급동역학모형/준이급동역학모형；△GY ﹤0、△HY ﹥0、△SY ﹥0,설명흡부과정위흡열반응,차재15~45℃온도하유리우반응순리자발진행.
A mineral-based porous granulation material ( MPGM ) was prepared for absorbing the heavy metal ions from quartz processing wastewater. Analytic results of the MPGM were illustrated by the techniques of BET, SEM and FT-IR, which revealed the excellent properties of multi-aperture distribution, large specific surface area, low loss ratio and so on; the N2 adsorption-desorption isotherm was type-Ⅲ with H4 hysteresis loop; the functional groups were dominated by groups of layer silicate mineral. A batch adsorption study was carried out with varied adsorbent dosage, initial pH and reaction time. The results showed that the residual ion concentrations of Fe, Zn, Mn and As were decreased from 77. 760, 3. 700, 2. 789 and 0. 963 mg·L-1 to 3. 421, 0. 574, 0. 126 and 0. 034 mg·L-1 , respectively. MPGM might be re-utilized after desorption by 1. 0 mol·L-1 NaCl for 12 hours, and the ideal adsorption performance was maintained after 5 recyclings. The adsorption equilibrium and kinetics followed Langmuir and typical pseudo-first-order/pseudo-second-order adsorption models. Thermodynamic parameters of △GY ﹤0,△HY ﹥0, △SY ﹥0 showed that the adsorptions were spontaneous and endothermic processes in the temperature range of 15-45℃.