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为探索苎麻麻骨治理重金属废水的工业化应用可行性,首先,利用激光粒度仪、SEM和FTIR等表征手段对苎麻麻骨微粒进行微观表征,探明了苎麻麻骨的微观结构;然后在此基础上,将苎麻麻骨微粒与环境友好型天然润湿剂、黏结剂及崩解剂混合,按一定工艺流程加工成水分散苎麻麻骨饼(WDRSC),在配方筛选过程中,测试了各种助剂质量分数对WDRSC性能的影响,并对苎麻麻骨与WDRSC吸附重金属Cu2+和Cd2+的能力进行了比较。结果显示:苎麻麻骨为具有多孔隙结构的天然物质,表面具有大量的吸附位点和官能团;当WDRSC配方中麻骨、润湿剂、黏结剂和崩解剂的质量比为75∶13∶2∶10时,WDRSC入水后能迅速被水润湿(润湿时间小于60s)并自动崩解(崩解时间小于60s),60s内悬浮率达80%左右,各项性能均符合水分散颗粒剂的要求;润湿剂、黏结剂和崩解剂均能不同程度地影响WDRSC的相关性能;与苎麻麻骨相比,WDRSC对Cd2+与Cu2+的去除率分别提高了11%和4%。所得结论表明将苎麻麻骨制成WDRSC具有运输和使用方便、成本低廉、制作工艺简单且吸附后废渣处理方便等优点,为苎麻麻骨规模化利用的可行方法。
In order to explore the industrial application feasibility of ramie hemp to treat heavy metal wastewater, the microstructure of ramie hemp bone was characterized by means of laser particle sizer, SEM and FTIR, and the microstructure of ramie hemp bone was proved. Then, , The ramie numb bone particles are mixed with environment-friendly natural wetting agent, binder and disintegrant, and then processed into water-dispersed ramie numbness cake (WDRSC) according to a certain technological process. During the formula screening process, various kinds of The influence of the mass fraction of auxiliaries on the properties of WDRSC was investigated. The ability of Ramie slang and WDRSC to adsorb heavy metals Cu2 + and Cd2 + were compared. The results showed that: Ramie numbness is a natural material with porous structure and has a large number of adsorption sites and functional groups on the surface. When the mass ratio of numbness, wetting agent, binder and disintegrant in WDRSC formula is 75:13: At 2:10, the WDRSC was quickly wetted by water (wetting time less than 60s) and disintegrated automatically (disintegration time less than 60s), and the suspension rate was about 80% within 60s. All the properties were in accordance with the water-dispersible granules The wettability agent, binder and disintegrant all affected the performance of WDRSC to some extent. Compared with ramie, the removal rate of WDRSC for Cd2 + and Cu2 + increased by 11% and 4% respectively. The obtained conclusion shows that the preparation of WDRSC with ramie hemp bone has the advantages of convenient transportation and use, low cost, simple production process and convenient disposal of waste residue after adsorption, which is a feasible method for large-scale utilization of ramie hemp bone.