Moreno-Marenco Astrid R, Giraldo Liliana, Moreno-Piraján Juan Carlos
Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Sede Bogotá, Carrera 30 No. 45-03 Bogotá, Colombia.
Departamento de Química, Facultad de Ciencias, Universidad de los Andes, Carrera, 1 No. 18 A-12 Bogotá, Colombia.
Data Brief. 2019 Jun 8;25:104100. doi: 10.1016/j.dib.2019.104100. eCollection 2019 Aug.
Methylparaben (MePB) is a type of emerging contaminant [1], commonly present in wastewater and surface water, widely used as preservatives in personal care products. The risk associated with the presence of this pollutant in the environment is due to their classification as an endocrine disruptor [2]. Two activated carbons obtained from African palm shell (Elaeis Guineensis) modified chemically by impregnation with CaCl (GC1) and MgCl (GM1) at 1% wt/v and carbonized in CO atmosphere at 1173 K, were prepared. The process of adsorption of methylparaben from aqueous solution to activated carbon is due to the interactions between the adsorbate and the adsorbent, which can be quantified through the determination of immersion enthalpies in aqueous solutions of MePB, finding values of - 22.45 and -45.23 J g for the immersion in the solution of 100 mg L, -3.31 and -44.02 J g for the immersion in the solution of 200 mg L and -21.31 and -54.51 J g, showing the highest values carbon GC1. To evaluate the efficiency of MePB adsorption on the obtained solids, Langmuir and Freundlich adsorption models were determined in order to relate the quantities adsorbed with the immersion enthalpies and know the intensity of the energy interactions between the MePB and the activated carbons.
对羟基苯甲酸甲酯（MePB）是一种新兴污染物[1]，常见于废水和地表水中，在个人护理产品中广泛用作防腐剂。这种污染物在环境中存在的风险源于其被归类为内分泌干扰物[2]。制备了两种由非洲棕榈壳（油棕）通过1%重量/体积的氯化钙（GC1）和氯化镁（GM1）浸渍化学改性并在1173K的CO气氛中碳化得到的活性炭。对羟基苯甲酸甲酯从水溶液吸附到活性炭上的过程是由于吸附质与吸附剂之间的相互作用，这可以通过测定MePB水溶液中的浸入焓来量化，在100mg/L溶液中的浸入焓值分别为-22.45和-45.23J/g，在200mg/L溶液中的浸入焓值分别为-3.31和-44.02J/g，在更高浓度溶液中的浸入焓值分别为-21.31和-54.51J/g，显示GC1活性炭的值最高。为了评估所得固体对MePB的吸附效率，测定了朗缪尔和弗伦德利希吸附模型，以便将吸附量与浸入焓联系起来，并了解MePB与活性炭之间能量相互作用的强度。
