CAJ | 학술논문

以电石渣和白碳黑分别作为钙质和硅质原料,采用水热法制备具有磷回收特性的水化硅酸钙。研究了制备条件对水化硅酸钙磷回收性能的影响,采用XRD揭示了水化硅酸钙的磷回收机制。通过BET、SEM表征了水化硅酸钙的微观结构,考察了水化硅酸钙的溶钙供碱能力。钙硅摩尔比为1.6∶1,水热反应温度为170℃,水热反应时间为4.5h,搅拌强度为90r/min的条件下所制备的水化硅酸钙,其磷回收产品中的磷含量达到18.64%。该材料具有多孔结构,比表面积达到113.3572m2/g,能够溶出的Ca2＋浓度为3.52mg/g,这些溶钙供碱特性使得该材料能够在pH值=9.0的环境下以羟基磷酸钙的形式从污水中回收磷。
이전석사화백탄흑분별작위개질화규질원료,채용수열법제비구유린회수특성적수화규산개。연구료제비조건대수화규산개린회수성능적영향,채용XRD게시료수화규산개적린회수궤제。통과BET、SEM표정료수화규산개적미관결구,고찰료수화규산개적용개공감능력。개규마이비위1.6∶1,수열반응온도위170℃,수열반응시간위4.5h,교반강도위90r/min적조건하소제비적수화규산개,기린회수산품중적린함량체도18.64%。해재료구유다공결구,비표면적체도113.3572m2/g,능구용출적Ca2＋농도위3.52mg/g,저사용개공감특성사득해재료능구재pH치=9.0적배경하이간기린산개적형식종오수중회수린。
Calcium silicate hydrate with phosphorus recovery efficiency was synthesized by carbide residue and silica. Effect of prepared method on phosphorus recovery efficiency of calcium silicate hydrate was studied. Mechanism of phosphorus recovery was revealed by XRD. Microstructure of calcium silicate hydrate was characterized by BET and SEM. Capacity of Ca^2+ and OH release was investigated. The considerable preparation conditions are obtained on the condition of Ca/Si molar ratio 1.6 - 1, reaction temperature 170℃, reaction time 4.5h, stirring intensity 90r/min. Phosphorus content of product of phosphorus recovery reached 18.64. The prepared calcium silicate hydrate has a high BET surface area 113. 3572m^2/g with porous structure. Concentration of Ca^2+ release reached 3.52mg/g. This material could recover phosphorus from wastewater in the form of hydroxyl calcium phosphate on the condition of pH=9.