CAJ | 학술논문

采用市售还原铁粉（零价铁，ZVI）及其与石英砂的复合物为吸附剂，对水中 As(Ⅲ)的吸附分别做了分批试验和连续性试验。分批试验结果表明，ZVI吸附水中As(Ⅲ)的去除效果受pH主导，其最佳pH范围4～9，ZVI主要通过其表面吸附及其腐蚀产物对As(Ⅲ)的吸附共沉淀作用达到对As(Ⅲ)的去除，同时，在ZVI腐蚀的过程中还伴有在ZVI表面As(Ⅲ)的氧化、还原作用，As(Ⅲ)的氧化受ZVI腐蚀过程的影响，其氧化过程主要发生在Fe2+氧化为Fe3+的阶段；连续性试验利用ZVI与石英砂复合物对模拟含砷废水进行吸附研究，从吸附柱进水至吸附饱和共20 d时间，经计算，ZVI对As(Ⅲ)的吸附容量为89.90 mg·g?1，ZVI腐蚀产物在石英砂表面的晶态类型对As(Ⅲ)的吸附容量有影响，无定形态的ZVI腐蚀产物对As(Ⅲ)的吸附容量最大，质量分数和原子分数分别可达到6.73%和2.15%。
채용시수환원철분（령개철，ZVI）급기여석영사적복합물위흡부제，대수중 As(Ⅲ)적흡부분별주료분비시험화련속성시험。분비시험결과표명，ZVI흡부수중As(Ⅲ)적거제효과수pH주도，기최가pH범위4～9，ZVI주요통과기표면흡부급기부식산물대As(Ⅲ)적흡부공침정작용체도대As(Ⅲ)적거제，동시，재ZVI부식적과정중환반유재ZVI표면As(Ⅲ)적양화、환원작용，As(Ⅲ)적양화수ZVI부식과정적영향，기양화과정주요발생재Fe2+양화위Fe3+적계단；련속성시험이용ZVI여석영사복합물대모의함신폐수진행흡부연구，종흡부주진수지흡부포화공20 d시간，경계산，ZVI대As(Ⅲ)적흡부용량위89.90 mg·g?1，ZVI부식산물재석영사표면적정태류형대As(Ⅲ)적흡부용량유영향，무정형태적ZVI부식산물대As(Ⅲ)적흡부용량최대，질량분수화원자분수분별가체도6.73%화2.15%。
The batch and column experiments on removal of As(Ⅲ) from aqueous environment by zero-valent iron (ZVI) and quartz sand mixed with ZVI were studied. The batch test results showed that removal efficiency of As(Ⅲ) by ZVI was dependent on pH value and the optimum range of pH was 4—9. As(Ⅲ) was mainly removed though adsorption and co-precipitation by the surface of ZVI and its corrosion products. Meanwhile, simultaneous oxidation and reduction of As(Ⅲ) on the surface of ZVI occurred during the corrosion process of ZVI. As(Ⅲ) was oxidized in oxidation of Fe2+to Fe3+. Quartz sand mixed with ZVI was used for the adsorption of As(Ⅲ) from simulated arsenic-containing wastewater in the column experiment. After 20 d of continuous adsorption of As(Ⅲ), the column was saturated. The calculated adsorption capacity of As(Ⅲ) by ZVI was 89.90 mg·g?1 and the adsorption capacity of As(Ⅲ) was affected by the crystalline types of ZVI corrosion products on the surface of quartz sand. In this study, amorphous corrosion products of ZVI had the largest adsorption capacity, and mass fraction and atom fraction reached 6.73 and 2.15 respectively.