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Evaluating the effects of water matrix constituents on micropollutant removal by activated carbon and β-cyclodextrin polymer adsorbents.
Water Research ( IF 11.4 ) Pub Date : 2020-01-27 , DOI: 10.1016/j.watres.2020.115551 Yuhan Ling 1 , Diego M Alzate-Sánchez 2 , Max J Klemes 2 , William R Dichtel 2 , Damian E Helbling 1
Water Research ( IF 11.4 ) Pub Date : 2020-01-27 , DOI: 10.1016/j.watres.2020.115551 Yuhan Ling 1 , Diego M Alzate-Sánchez 2 , Max J Klemes 2 , William R Dichtel 2 , Damian E Helbling 1
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The performance of adsorbents for the removal of organic micropollutants (MPs) from water can be influenced by the presence of water matrix constituents. The objective of this research was to evaluate the influence of water matrix constituents on the performance of coconut-shell activated carbon (CCAC), porous β-cyclodextrin polymer (CDP), and CDP coated on cellulose microcrystal (CDP@CMC) adsorbents. MP removals were measured in batch experiments for a mixture of 90 MP at 1 μg L-1 and MP breakthrough was measured in rapid small-scale column test (RSSCT) experiments for a mixture of 15 MP at 500 ng L-1. All experiments were performed first with nanopure water, and subsequently with six different water samples collected from two separate groundwater, surface water, and wastewater effluent sources. The results of batch and RSSCT experiments demonstrate more rapid adsorption kinetics and less adsorption inhibition in the presence of matrix constituents for CDP adsorbents relative to CCAC. Further, the treatment capacity of CDP@CMC in the RSSCT experiments was higher than that of CCAC, particularly in more complex water matrices. Statistical analyses were performed to investigate associations between adsorption inhibition among groups of MPs and the concentrations of specific water matrix constituents. For CCAC, adsorption inhibition was observed for all MPs and was primarily attributed to the presence of dissolved organic matter with molar weight less than 1000 Da. For CDP adsorbents, adsorption inhibition was primarily observed for cationic MPs and was attributed to the screening of the negative surface charge of CDP by inorganic ions in water samples with high ionic strength. These data further demonstrate the value of CDP as an alternative adsorbent to CCAC for the removal of MPs during water and wastewater treatment.
中文翻译：
评估水基质成分对活性炭和β-环糊精聚合物吸附剂去除微污染物的影响。
吸附剂从水中去除有机微污染物（MPs）的性能可能会受到水基质成分的影响。这项研究的目的是评估水基成分对椰子壳活性炭（CCAC），多孔β-环糊精聚合物（CDP）和CDP涂覆在纤维素微晶（CDP @ CMC）吸附剂上的性能的影响。在批处理实验中，对1μgL-1的90 MP混合物测量了MP去除，在500 ng L-1的15 MP的混合物的快速小规模柱测试（RSSCT）实验中测量了MP的突破。所有实验都首先使用纳米纯水进行，然后使用分别从两个单独的地下水，地表水和废水排放源收集的六个不同的水样品进行。批处理和RSSCT实验的结果表明，相对于CCAC，在CDP吸附剂的基质成分存在下，吸附动力学更快，吸附抑制更小。此外，在RSSCT实验中CDP @ CMC的处理能力要比CCAC高，特别是在更复杂的水基质中。进行统计分析以研究MP组之间的吸附抑制与特定水基质成分浓度之间的关联。对于CCAC，在所有MP中均观察到吸附抑制作用，这主要归因于存在分子量小于1000 Da的溶解有机物。对于CDP吸附剂，吸附抑制作用主要是针对阳离子MP观察到的，这归因于通过高离子强度水样品中无机离子对CDP负表面电荷的筛选。这些数据进一步证明了CDP作为CCAC替代吸附剂在水和废水处理过程中去除MP的价值。
更新日期：2020-01-27
中文翻译：
评估水基质成分对活性炭和β-环糊精聚合物吸附剂去除微污染物的影响。
吸附剂从水中去除有机微污染物（MPs）的性能可能会受到水基质成分的影响。这项研究的目的是评估水基成分对椰子壳活性炭（CCAC），多孔β-环糊精聚合物（CDP）和CDP涂覆在纤维素微晶（CDP @ CMC）吸附剂上的性能的影响。在批处理实验中，对1μgL-1的90 MP混合物测量了MP去除，在500 ng L-1的15 MP的混合物的快速小规模柱测试（RSSCT）实验中测量了MP的突破。所有实验都首先使用纳米纯水进行，然后使用分别从两个单独的地下水，地表水和废水排放源收集的六个不同的水样品进行。批处理和RSSCT实验的结果表明，相对于CCAC，在CDP吸附剂的基质成分存在下，吸附动力学更快，吸附抑制更小。此外，在RSSCT实验中CDP @ CMC的处理能力要比CCAC高，特别是在更复杂的水基质中。进行统计分析以研究MP组之间的吸附抑制与特定水基质成分浓度之间的关联。对于CCAC，在所有MP中均观察到吸附抑制作用，这主要归因于存在分子量小于1000 Da的溶解有机物。对于CDP吸附剂，吸附抑制作用主要是针对阳离子MP观察到的，这归因于通过高离子强度水样品中无机离子对CDP负表面电荷的筛选。这些数据进一步证明了CDP作为CCAC替代吸附剂在水和废水处理过程中去除MP的价值。
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