CAJ | 학술논문

以煤矸石与淀粉为原料，以微波为唯一热源，经过活化、水解、接枝，制备了三种新型的煤矸石基PAFC-淀粉复合絮凝剂。自制煤矸石基PAFC-玉米(马铃薯)淀粉絮凝剂对水城河水、洗煤废水的浊度去除率与COD去除率均高于市售PAM，且成本不高于市售PAM的1/6。实验结果表明：将70目活性炭与150.0 g 200目煤矸粉以2.0：1的质量配比充分混合后在800 W功率下活化30 min，铝铁相对浸出率可达1.62；活性炭经2次循环后亚甲蓝吸附值比新炭提高40.77 mg?g-1，铝铁相对浸出率也同时达到峰值2.107，表明该过程为协同活化；将浸出液在320 W微波场中水解18 min，所制煤矸石基PAFC的盐基度为68.9%，达到GB 15892-2003标准；在1：0.06的最佳质量配比下，固体煤矸石基PAFC与玉米淀粉在400W微波场中接枝16 min时的接枝率为71%，接近极限接枝率74%。玉米淀粉、马铃薯淀粉与木薯淀粉在电子万用炉上与煤矸石基PAFC接枝均存在与功率无关的“失效温度点”，分别为96.8、98.6、97.8℃，且接枝速度仅为微波接枝速度的79%。
이매안석여정분위원료，이미파위유일열원，경과활화、수해、접지，제비료삼충신형적매안석기PAFC-정분복합서응제。자제매안석기PAFC-옥미(마령서)정분서응제대수성하수、세매폐수적탁도거제솔여COD거제솔균고우시수PAM，차성본불고우시수PAM적1/6。실험결과표명：장70목활성탄여150.0 g 200목매안분이2.0：1적질량배비충분혼합후재800 W공솔하활화30 min，려철상대침출솔가체1.62；활성탄경2차순배후아갑람흡부치비신탄제고40.77 mg?g-1，려철상대침출솔야동시체도봉치2.107，표명해과정위협동활화；장침출액재320 W미파장중수해18 min，소제매안석기PAFC적염기도위68.9%，체도GB 15892-2003표준；재1：0.06적최가질량배비하，고체매안석기PAFC여옥미정분재400W미파장중접지16 min시적접지솔위71%，접근겁한접지솔74%。옥미정분、마령서정분여목서정분재전자만용로상여매안석기PAFC접지균존재여공솔무관적“실효온도점”，분별위96.8、98.6、97.8℃，차접지속도부위미파접지속도적79%。
Composite flocculants were prepared by an activating-hydrolysis-graft method with microwave as the only heat source, and coal gangue and starch were used as the raw materials. The results show that the turbidity decreasing and COD removal rates of the prepared flocculants (gangue based PAFC-corn (or potato) starch) are higher than commercial PAM in the treatment of water from Shuicheng River or coal-washing wastewater, while the cost is less than 1/6 of the commercial PAM. 70 mesh GAC and 200 mesh gangue powder were mixed with a mass ratio of 2:1 and activated with 800 W microwave power for 30 min, and the relative Al/Fe leaching rate is 1.62. The GAC after two treatment cycles has a methylene blue adsorption value of 40.77 mg?g-1 higher than that of new carbon, and the relative Al/Fe leaching rate is 2.017. After hydrolyzing in 320 W microwave power for 18 min, the basicity of the gangue based PAFC is 68.9%and meets GB 15892-2003. The grafting rate is 71% after mixing the gangue-based PAFC and corn starch (1:0.06) for 16 min in 400 W microwave power, which is close to the limiting grafting rate of 74%. The failure temperature points always exist in E-Wan furnace for the grafting, which are 96.8℃, 98.6℃ and 97.8℃ for corn, potato and cassava starch, respectively. The grafting rate is 79%of that of the microwave grafting.