利用水处埋厂含铝污泥烧制的海藻酸钠珠粒增强对砷的吸附。
Enhanced adsorption of arsenic using calcined alginate bead containing alum sludge from water treatment facilities.
机构信息
Department of Environmental Engineering and Soil Environment Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin, Jeonju, Jeollabukdo, 564-756, Republic of Korea.
Dasan Consultants, 15 Songi-ro 30-gil, Songpa-gu, Seoul, 05800, Republic of Korea.
出版信息
J Environ Manage. 2019 Mar 15;234:181-188. doi: 10.1016/j.jenvman.2018.12.105. Epub 2019 Jan 9.
An adsorbent of bead type to remove arsenic (As) was developed by calcination of sodium alginate and polyvinyl alcohol containing a powder form of alum sludge. The adsorbent was evaluated in terms of adsorption kinetics, capacities in batch tests and by a column study. The calcination process created rough surface and increased the surface area of bead 100 times, which enhanced the adsorption kinetics of As onto the calcined adsorbent 3-21 times than un-calcined bead. However, the adsorption capacity decreased slightly compared to the un-calcined adsorbent. The column study showed similar adsorption capacity with commercial adsorbent and powder form of alum sludge considering the standard value of As for drinking water. The calcination process enhanced the adsorption kinetics of the adsorbent for As removal, one of major barrier of bead type adsorbent compared to powder type, which could reduce the bed volume of the reactor.
一种用于去除砷（As）的珠状吸附剂是通过煅烧含有粉状矾土污泥的海藻酸钠和聚乙烯醇制备的。通过吸附动力学、批量试验和柱试验评估了吸附剂。煅烧过程形成了粗糙表面，并使珠体的表面积增加了 100 倍，这使得砷在煅烧吸附剂上的吸附动力学提高了 3-21 倍，而未煅烧珠体的吸附动力学则提高了 3-21 倍。然而，与未煅烧的吸附剂相比，吸附容量略有下降。考虑到饮用水中砷的标准值，柱试验表明，与商用吸附剂和粉状矾土污泥相比，该吸附剂具有相似的吸附容量。煅烧过程增强了吸附剂对砷的吸附动力学，这是珠状吸附剂相对于粉状吸附剂的主要障碍之一，这可以减少反应器的床层体积。
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