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摘要:
利用Al3+离子较易水解聚合的性质，合成了原位柱撑改性膨润土（PMCs），通过单因素试验探讨了PMCs的用量及搅拌时间对水样的去除效果；并对比了PMCs与PAC（聚合氯化铝）及纳基膨润土对水样的处理效果。结果表明：当添加3 g/50 mL PMCs、搅拌时间为60 min时，对养殖废水的处理效果最优，此时，CODcr、总氮、总磷、氨氮的去除率分别为90.27%、90.21%、90.1%、90.5%，且在最佳用量下，PMCs处理养殖废水的效果明显优于钠基膨润土，与PAC比较也占有一定的优势，希望能在未来的工业发展中大范围使用，逐渐代替具有微毒性的聚合氯化铝。
Abstract:In-situ pillared modified bentonites (PMCs) were synthesized by using the properties of Al3+ ions, which were easily hydrolyzed and polymerized. The single-factor test was used to investigate the removal effect of PMCs and the mixing time on the water samples. The treatment effect of the PMCs were compared with PAC and Na-bentonite on water samples. The conclusion is as follows:When 3 g/50 mL PMCs is addes and stirring time is 60 min, the treatment effect of aquaculture wastewater is the best. At this time, the removal rates of CODCr, total nitrogen, total phosphorus and ammonia nitrogen are 90.27%, 90.21%, 90.1% and 90.5%, respectively. and at the optimum dosage, the effect of PMCs in treating aquaculture wastewater is obviously better than that of sodium bentonite. It also has certain advantages compared with PAC. It is hoped that it can be widely used in future industrial development, gradually replacing the micro-toxic polyaluminium chloride.
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Key words:
- modified bentonite /
- Na-bentonite /
- polyaluminium chloride /
- modification /
- aquaculture wastewater
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表 1 钠基膨润土的化学组成 /%
Table 1. Chemical composition of the Na-based bentonite
成分 SiO2 Al2O3 Fe2O3 CaO MgO Na2O K2O P2O5 MnO 烧失量 含量 65.6 17.7 2.1 1.8 2.3 3.4 0.7 0.01 0.05 5.98 
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