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Novel synthetic method for magnetic sulphonated tubular trap for efficient mercury removal from wastewater.
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2020-01-11 , DOI: 10.1016/j.jcis.2020.01.024
Mudasir Ahmad 1 , Jiqi Wang 2 , Jia Xu 2 , Zouting Yang 2 , Qiuyu Zhang 3 , Baoliang Zhang 4
Affiliation  

Highly efficient Hg(II) adsorption from wastewater remains a crucial task for human health and environment protection. In present work, a simple method was used to develop a carbon-based mercury magnetic "trap" (magnetic sulphonated tubular trap, MSTT) as proved by increasing surface area and wide diameter porous magnetic trap with a high density of strong Hg(II) chelating groups. Various parameters including the initial concentration of Hg(II), pH, contact time and adsorbent dosage are analyzed. The adsorption results of MSTT and sulphonated tubular trap (STT) are closely fitted with the Langmuir adsorption isotherm with maximum adsorption capacities were 970.87 (mg/g) and 952.38 (mg/g). It reveals 99.9 ± 0.5% Hg(II) adsorption occurs at pH 6.8, which is close to neutral pH. These traps can efficiently reduce Hg(II) from 10 (mg/L) to 0.3 (μg/L) in a short time of 10 min. This level is lower than the permissible limit for the drinking water. The calculated thermodynamic parameters ΔH°, ΔG°, and ΔS° indicate that the adsorption of Hg(II) onto MSTT and STT are endothermic, spontaneous and random adsorption process. The regeneration of adsorbents and high Hg(II) adsorption efficiencies in the presence of other metal ions will endow the prepared MSTT and STT with a promise for efficient Hg(II) adsorption for environmental remediation.

中文翻译:

磁性磺化管式捕集器的新型合成方法,可有效去除废水中的汞。

从废水中高效吸附Hg(II)仍然是人类健康和环境保护的关键任务。在目前的工作中,一种简单的方法被用于开发碳基汞磁性“陷阱”(磁性磺化管状陷阱,MSTT),方法是通过增加表面积和具有高密度强Hg(II)的宽直径多孔磁性陷阱来证明螯合组。分析了各种参数,包括Hg(II)的初始浓度,pH,接触时间和吸附剂剂量。MSTT和磺化管状捕集阱(STT)的吸附结果与Langmuir吸附等温线紧密拟合,最大吸附容量为970.87(mg / g)和952.38(mg / g)。结果表明,在pH 6.8(接近中性pH)下发生了99.9±0.5%的Hg(II)吸附。这些陷阱可以有效地将Hg(II)从10(mg / L)减少到0。在10分钟的短时间内达到3(μg/ L)。该水平低于饮用水的允许极限。计算得出的热力学参数ΔH°,ΔG°和ΔS°表明Hg(II)在MSTT和STT上的吸附是吸热,自发和无规吸附过程。在存在其他金属离子的情况下,吸附剂的再生和高Hg(II)吸附效率将使制备的MSTT和STT有望有效地吸附Hg(II),以进行环境修复。
更新日期:2020-01-13
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