Enrichment of chlorobenzene and o-nitrochlorobenzene on biomimetic adsorbent prepared by poly-3-hydroxybutyrate (PHB).
Enrichment of chlorobenzene and o-nitrochlorobenzene on biomimetic adsorbent prepared by poly-3-hydroxybutyrate (PHB).
复制标题
DOI：
10.1016/j.jhazmat.2009.12.062
复制
发表时间：
2010-05
影响因子：
13.6
通讯作者：
Xiaoxuan Zhang;Chao-hai Wei;Qin-zheng He;Yuan Ren
中科院分区：
文献类型：
--
作者：
Xiaoxuan Zhang;Chao-hai Wei;Qin-zheng He;Yuan Ren
以聚3-羟基丁酸酯（PHB）为新材料，采用改性双乳液溶剂蒸发技术制备了仿生吸附剂。以氯苯（CB）和邻硝基氯苯（o-NCB）为吸附剂，通过吸附等温线、富集因子（EF）和富集动力学评价了吸附剂对有毒脂溶性有机物的富集能力。结果表明，Sips等温线比Langmuir和Freundlich模型更能拟合实验数据，拟二阶动力学模型比一阶模型更能拟合实验数据。吸附剂的比表面积（BET）仅为8.45m2 - 1，但在20℃作用36h时，对炭黑和o-NCB的最大吸附量分别为125.99和39.56mg - 1，最大EF分别为1204和1149。由于亲水性基团（-NO2）降低了o-NCB的脂溶性，因此CB的EF高于o-NCB。kowah与EF呈正相关，说明有机氯化合物容易被吸附剂吸附。结果表明，PHB甚至聚羟基烷酸酯都可以作为一种新的生物可降解吸附材料。
Poly-3-hydroxybutyrate (PHB) was used as a new material to prepare a biomimetic adsorbent by a modified double emulsion solvent evaporation technique. The enrichment capacities of the adsorbent for the toxic liposoluble organic compounds were evaluated by chlorobenzene (CB) and o-nitrochlorobenzene (o-NCB) with the adsorption isotherms, enrichment factor (EF) and enrichment kinetics. The results showed that Sips isotherm fitted the experimental data better than Langmuir and Freundlich models, as well as the pseudo-second order kinetic model fitted better than the first order model. For CB and o-NCB, the maximum adsorption capacity was 125.99 and 39.56mgg−1, while the maximum EF was 1204 and 1149 at 20°C for 36h, though the specific surface area (BET) of the adsorbent was only 8.45m2g−1. CB had a higher EF than o-NCB because the hydrophilic group (–NO2) decreases the liposoluble ability of o-NCB. Kowhas a positive correlation with EF, so the organochlorine compounds are liable to be adsorbed by the adsorbent. The results indicated that PHB, even polyhydroxyalkanoates, can be a new biodegradable adsorption material.