Long-term stabilization of lead contaminated soil with a novel dithiocarboxylate functionalized hyperbranched polymer
Long-term stabilization of lead contaminated soil with a novel dithiocarboxylate functionalized hyperbranched polymer
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使用新型二硫代羧酸盐官能化超支化聚合物长期稳定铅污染土壤
DOI：
10.1016/j.jece.2022.108214
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发表时间：
2022-07
影响因子：
7.7
通讯作者：
Yanhuang Zhu
中科院分区：
文献类型：
--
作者：
Ying Cao;Bingru Zhang;Mengru Guo;Xinyu Wang;Yanhuang Zhu
开发一种合成工艺简单、成本低、耐酸的重金属稳定剂对污染土壤重金属的长期修复具有重要意义。本文研究了一种新型重金属螯合稳定剂——六（二硫代羧酸钾）功能化星形超支化聚合物-三甲基丙烷核（TMP/EDA/HDTC）对土壤重金属的稳定作用。研究结果表明，TMP/EDA/HDTC在低剂量（1.5% w/w）下对土壤中生物可利用性铅的稳定率接近100%。此外，TMP/EDA/HDTC稳定的Pb可抵抗强酸、强碱、乙酸、二乙烯三胺五乙酸等多种环境介质的浸出。机理研究表明，TMP/EDA/HDTC具有独特的星形超支化结构特征，具有不同空间取向的多个二硫代羧酸基团，通过化学螯合和物理包埋形成超大分子螯合配合物网络，实现了对重金属的双重稳定。网络结构的形成对重金属的稳定具有重要意义，因为原来存在于交换部分和碳酸盐部分的金属在网络结构中被稳定，然后转化为更稳定的氧化部分和残余部分。随着时间的增加，稳定组分的比例呈现缓慢而小的增加趋势，直至趋于稳定，这对污染土壤中重金属的长期稳定至关重要。•二硫代羧酸功能化聚合物用于稳定•长期稳定污染土壤中的重金属。通过化学螯合和物理包埋实现了铅的双重稳定
It is of great significance to develop a heavy metal stabilizer with simple synthesis process, low cost and acid resistance for long-term remediation of heavy metals in contaminated soil. In this work, a novel heavy metal chelating stabilizer, hexa(potassium dithiocarboxylate) functionalized star-shaped hyperbranched polymer with a trimethylolpropane core (TMP/EDA/HDTC), is studied for the stabilization effect on heavy metals in soil. The study results showed that the TMP/EDA/HDTC achieved a nearly 100% stabilization rate of bioavailable lead in the soil at a low dosage (1.5% w/w). Moreover, Pb stabilized by TMP/EDA/HDTC resisted the leaching of various environmental media, such as strong acid, strong alkali, acetic acid, and diethylenetriaminepentaacetic acid. The mechanism study revealed that TMP/EDA/HDTC's unique star-shaped hyperbranched structure characteristics with multiple dithiocarboxylate groups in different spatial orientations achieved double stabilization for heavy metals through the chemical chelation and the physical embedding to form a network of super macromolecule chelate complexes. The formation of the network structures was significant for heavy metal stabilization as the metals that were originally present in the exchangeable fraction and carbonate fraction were stabilized in the network structures and then transformed into more stable oxidizable fraction and residual fraction. With the increase of time, the proportion of stable fractions showed a slow and small increase until it tended to be constant, and this is critical for the long-term stabilization of heavy metals in contaminated soil. • Dithiocarboxylate-functionalized polymers were used to stabilization • Long-term stabilization of heavy metals in contaminated soil. • Dual stabilization for Pb was achieved by chemical chelation and physical embedding • The formation of the network structures enhanced its performance
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影响因子：
1.9
作者：
Gye-Nam Kim;Seung-Soo Kim;J. Moon;J. Hyun
通讯作者：
Gye-Nam Kim;Seung-Soo Kim;J. Moon;J. Hyun
蒙脱土改良剂修复重金属污染土壤的理化性质、金属有效性和细菌群落结构
影响因子：
8.8
作者：
Qin Chencheng;Yuan Xingzhong;Xiong Ting;Tan Yong Zen;Wang Hou
通讯作者：
Wang Hou
DOI：
10.1007/s11270-016-3054-1
发表时间：
2016-09
期刊：
Water, Air, & Soil Pollution
影响因子：
--
作者：
A. Moghal;K. Reddy;S. A. S. Mohammed-S.-A.-S.-Mohammed-92228389;M. Al-Shamrani;W. M. Zahid
通讯作者：
A. Moghal;K. Reddy;S. A. S. Mohammed-S.-A.-S.-Mohammed-92228389;M. Al-Shamrani;W. M. Zahid
影响因子：
7.8
作者：
Vinita Khum-in;Jirapon Suk-in;Papop In-ai;Kitsanateen Piaowan;Yanapat Phaimisap;W. Supanpaiboon;T. Phenrat
通讯作者：
Vinita Khum-in;Jirapon Suk-in;Papop In-ai;Kitsanateen Piaowan;Yanapat Phaimisap;W. Supanpaiboon;T. Phenrat
影响因子：
13.6
作者：
Fan, Jiajun;Cai, Chao;Hou, Yanwei
通讯作者：
Hou, Yanwei