以绿化废弃物为原料的复合型抑尘剂的制备及其综合性能

针对建筑施工场地扬尘和绿化废弃物资源化率低的问题,利用绿化废弃物悬铃木枝条为原料制备羧甲基纤维素钠(CMC),将其与聚乙烯醇(PVA)和辛癸基葡糖苷(APG0810)进行复配,制备出了一种复合型抑尘剂.以黏结性、润湿性、抗风蚀性和生物毒性为指标,探究了各组分用量对各种性能的影响,并利用TOPSIS法对复合型抑尘剂的综合...

Preparation and comprehensive performance of a composite dust suppressant using greening wastes as raw material

Aimed at suppression of the dust raising at construction sites and resource utilization of the urban greening wastes, the Platanus branches were used as raw material to prepare sodium carboxymethyl cellulose (CMC), a composite dust suppressant, by compositing it with polyvinyl alcohol (PVA) and octyl decyl glucoside (APG0810). The effects of the amount of each component on the performance of the dust suppressant were evaluated in terms of adhesiveness, wetting ability, wind-resistance and biotoxicity. The comprehensive performance of the dust composite suppressant was analyzed by using the TOPSIS method. The results showed that the cohesiveness and wind-resistance are mainly affected by CMC and PVA content, and APG0810 is the main component that affects the wetting ability and biotoxicity. When CMC, PVA and APG0810 are 0.20%, 2.00% and 0.10%, respectively, the composite dust suppressant shows the best comprehensive performance. In this ratio, the viscosity at 25 ℃ is 41.97 mPa·s, showing good adhesiveness. The settling time of dust in the suppressant is 68.62 s, indicating good soil-wetting ability. With good wind erosion resistance, the mass loss rate is 0.57% under the wind speed of 5.6 m·s−1 for 5 min. The dust suppressant has low biotoxicity, and the germination rate of wheat seeds can reach 70%. The research results provide a new approach for the resource utilization of greening wastes and the preparation of the composite dust suppressant.