caa a22 4500 606199969 CHVBK 20210128100941.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10653-015-9692-1 doi (NATIONALLICENCE)springer-10.1007/s10653-015-9692-1 Effects of natural organic matter on the coprecipitation of arsenic with iron [Elektronische Daten] [Eun Kim, Bo-Ram Hwang, Kitae Baek] Natural organic matter (NOM) can affect arsenic speciation and mobility in the environment. In this study, the effects of NOM on the coprecipitation of arsenic with iron were investigated in order to better understand the fate and transport of arsenic in natural environments. The coprecipitation of arsenic with iron was studied in the presence and absence of NOM under various arsenic-to-iron molar ratios (As/Fe) and pH conditions. The addition of humic acid (HA) hindered the As-Fe coprecipitation under high pH and high As/Fe conditions by forming a soluble As-Fe-HA complex. The X-ray diffraction and Fourier transform infrared studies showed that the As-Fe-coprecipitated solid phase was highly affected by pH and As/Fe. The arsenic was coprecipitated with iron as an amorphous ferric arsenate phase at a low pH level or high As/Fe conditions, while the formation of ferrihydrite phase and the arsenic incorporation to the ferrihydrite by adsorption was predominant at high pH levels or low As/Fe conditions. The HA affected the As-Fe-coprecipitated solid phase depending on the As/Fe molar ratio under neutral and alkaline conditions. Springer Science+Business Media Dordrecht, 2015 Arsenic nationallicence Iron nationallicence Natural organic matter nationallicence Coprecipitation nationallicence Kim Eun Department of Bioactive Material Sciences, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, 561-675, Jeonju, Jeollabukdo, Republic of Korea aut Hwang Bo-Ram Department of Environmental Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, 561-675, Jeonju, Jeollabukdo, Republic of Korea aut Baek Kitae Department of Bioactive Material Sciences, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, 561-675, Jeonju, Jeollabukdo, Republic of Korea aut Environmental Geochemistry and Health Springer Netherlands 37/6(2015-12-01), 1029-1039 0269-4042 37:6<1029 2015 37 10653 https://doi.org/10.1007/s10653-015-9692-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10653-015-9692-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kim Eun Department of Bioactive Material Sciences, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, 561-675, Jeonju, Jeollabukdo, Republic of Korea aut NATIONALLICENCE 700 1- Hwang Bo-Ram Department of Environmental Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, 561-675, Jeonju, Jeollabukdo, Republic of Korea aut NATIONALLICENCE 700 1- Baek Kitae Department of Bioactive Material Sciences, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, 561-675, Jeonju, Jeollabukdo, Republic of Korea aut NATIONALLICENCE 773 0- Environmental Geochemistry and Health Springer Netherlands 37/6(2015-12-01), 1029-1039 0269-4042 37:6<1029 2015 37 10653