@article{oai:iwate-u.repo.nii.ac.jp:00015725,
 author = {小川, 絵莉子 and 下道, 諒志 and 石川, 奈緒 and 笹本, 誠 and 伊藤, 歩},
 issue = {7},
 journal = {土木学会論文集G（環境）, Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)},
 month = {},
 note = {本研究では，固体状キレート剤による下水消化汚泥からの有害重金属類の除去手法の開発を目指し，繊維状キレート剤による酸性模擬廃水および下水消化汚泥中の溶解性重金属類の吸着に及ぼす反応時間およびpHの影響について検討した．まず，模擬廃水での吸着実験では，キレート剤は1時間程度で重金属を吸着でき，pHが3以上の条件において，その吸着効果を十分に発揮することが分かった．次に，下水消化汚泥を酸性（pH = 2）にして溶出させた重金属類の吸着実験では，pHを2から2.5や3に上昇させることでキレート剤への吸着量が増加したが，汚泥に再吸着する量も増加した．pH 2においてもキレート剤への吸着がみられたことから，強酸性条件下であっても下水消化汚泥から溶解性重金属類を吸着除去できる可能性が示された．, In this study, with the aim of developing a method for removing harmful heavy metals from anaerobically digested sewage sludge by using solid chelating agents, the effects of reaction time and pH on the adsorption of soluble heavy metals in acidic simulated wastewater and anaerobically digested sewage sludge were investigated by using a fibrous chelating agent. First, in an adsorption experiment with simulated wastewater, it was found that the chelating agent could adsorb heavy metals in about 1 hour, and fully exerted its adsorption effect when the pH is higher than or equal to 3. Next, in the adsorption experiment of heavy metals eluted by acidifying the sewage digested sludge (pH = 2), the amount of heavy metals adsorbed to the chelating agent was increased by increasing the pH from 2 to 2.5 or 3, although re-adsorption of Cu and Pb to the sludge solid also occurred. Adsorption of heavy metals to chelating agent was observed even at pH 2, indicating that soluble heavy metals could be adsorbed and removed from anaerobically digested sewage sludge using a solid polymeric chelating agent even under strongly acidic conditions.},
 pages = {III_93--III_10},
 title = {酸性条件下における下水消化汚泥中の溶解性重金属類の繊維状キレート剤による吸着特性},
 volume = {76},
 year = {2020}
}