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用CTMAB(十六烷三甲基溴化铵)对陶粒进行改性,以卡马西平(CBZ)为目标污染物,研究了吸附去除饮用水中CBZ的性能并探讨了其应用的可行性。通过滤料吸附去除CBZ的动态实验,发现改性陶粒的去除效果优于陶粒。进水CBZ浓度为2μg·L~(-1)时,改性陶粒对CBZ的去除率最高为50%,陶粒最高的去除率为40%。研究了滤料再生对吸附性能的影响,发现陶粒和改性陶粒对CBZ的去除均随再生次数的增加而降低,改性陶粒的去除效果仍优于陶粒,改性陶粒的使用期限更长久。讨论了修正前后的Thomas模型,推导得到能更准确描述穿透曲线的Thomas模型取值范围。滤料穿透曲线用原始Thomas模型能很好地计算的速率常数kTh和平衡吸附量q0。利用原始Thomas模型也能较为准确地预测滤柱的穿透时间。
The ceramsite was modified by CTMAB (hexadecane trimethyl ammonium bromide), CBZ was taken as the target pollutant, the adsorption and removal of CBZ in drinking water was studied and the feasibility of its application was discussed . The dynamic experiments of removal of CBZ by filter media showed that the removal of modified ceramsite was better than that of ceramsite. When CBZ concentration was 2μg · L -1, the removal rate of CBZ was 50% and that of ceramsite was 40%. The effect of filter media regeneration on adsorption properties was studied. It was found that the removal of CBZ by ceramsite and modified ceramsite decreased with the increase of regeneration times, and the removal efficiency of modified ceramsite was still better than that of ceramsite and modified ceramsite The use of more long-term. The Thomas model before and after modification is discussed and the range of Thomas model which can describe the penetration curve more accurately is deduced. The filter penetration curve can be well calculated using the original Thomas model for the rate constant kTh and equilibrium adsorption capacity q0. The original Thomas model can also predict the breakthrough time of the filter column more accurately.