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and Energy Engineering, Kunming University of Science and Technology,Kunming 650093, China) Abstract: The arsenic-containing wastewater produced by the copper smelting process was studied to investigate the hydrothermal precipitation arsenic as scorodite and the conversion behavior of process metastable phases. The results show that the increase of initial molar ratio of Fe to As, oxygen partial pressure......
会形成絮凝体,吸附污酸中砷.另外,在此条件下,溶液中As5+和Fe3+会发生化学反应生成无定形砷酸铁,使砷元素进入固相,达到去除砷的效果[32].由图10看出,砷的去除效率和铁回收效率基本保持一致,溶液中铁离子大多都回收至固相中,且污酸酸度越高,铁的回收效果越好,最高可达97%左右. 图9 不同酸度污酸中砷去除效率 Fig. 9 Arsenic removal... from arsenic for public health in the Province of Siena[J]. Science of the Total Environment, 2004, 327(1): 41-51. [2] 郭恒萍, 高俊发. 冶炼含砷污酸与酸性含砷废水处理试验及应用研究[D]. 西安: 长安大学, 2010. GUO Heng-ping, GAO Jun-fa......
可以看出,该高砷锑金矿主要有辉锑矿,黄铁矿,砷黄铁矿和二氧化硅,可以判断,锑和砷分别以辉锑矿和砷黄铁矿形态存在. 表1 高砷锑金矿的主要化学成分 Table 1 Main chemical composition of high-arsenic antimony-gold concentrate (mass fraction, %) 图1 高砷锑金矿的XRD谱 Fig. 1 XRD pattern of high-arsenic antimony-gold concentrate 1.2 浸出原理和实验方法 1.2.1 浸出原理 高砷锑金矿浸出过程是Sb2S3与Na2S发生反应,使锑以Na3SbS3形式进入溶液,加入NaOH可以抑制Na2S的水解,浸出过程发生的化学反应如下: Sb2S3+3Na2S......
of the uniformity of electric properties of In-doped SI-GaAs,whichhas been annealed at 950℃ for 6h under arsenic pressure,associates with decreases of point defects and arsenic vacancies.关键词:......
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arsenite from waste acid containing arsenic and its application in copper electrolyte purification WANG Yong, ZHAO Pan-feng, ZHENG Ya-jie (School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China) Abstract Copper arsenite prepared from waste acid containing arsenic was applied in copper electrolyte purification. The results show that the removal rates of Pb......
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and permeability. When toxic components, e.g., arsenic from refractory gold ore, are present, encapsulation will be required. Process water is typically recycled as far as possible, although any excess... that arsenic in oxidation state +6 can be readily removed for discharge (＜50×10-12 As), although additional ion exchange is needed for potable water (＜10×10-12 As). Key words: cementation; waste processing......
Trans. Nonferrous Met. Soc. China 30(2020) 2823-2835 Assessment of selective sequential extraction procedure for determining arsenic partitioning in copper slag Hui-bin ZHANG1, Yu-zheng HE1, Jing... Group, Tongling 244000, China Received 27 January 2020; accepted 4 August 2020 Abstract: An optimized selective sequential extraction (SSE) procedure was developed to assess the arsenic......
; 文献标志码:A 文章编号:1672-7207(2010)04-1251-05 Remove of arsenic, antimony and bismuth from crude crystal copper sulfate CHEN..., China) Abstract: Arsenic, antimony and bismuth in crude copper sulfate were removed by oxidization-neutralization- coprecipitation method to meet the quality requirement of copper sulfate......
