عنوان
پدید آورنده
موضوع
رده
کتابخانه
محل استقرار
شماره کتابشناسی ملی
شماره
LA671597kw
عنوان و نام پديدآور
عنوان اصلي
Adsorption and reduction of roxarsone on magnetic greigite (Fe3S4):
نام عام مواد
[Article]
نام نخستين پديدآور
Liu, WAi, ZDahlgren, RAZhang, LWang, X
عنوان اصلي به قلم نويسنده ديگر
Indispensable role of structural sulfide
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
© 2017 Elsevier B.V. Roxarsone (ROX) is an organoarsenic compound that is widely used as an additive in swine and poultry feed to inhibit disease and promote growth. Due to its low metabolism in animals, it is excreted in animal urine and feces leading to its widespread contamination of soils and aquatic ecosystems. Herein, we demonstrated that ROX can be adsorbed and subsequently reduced by a common iron sulfide (greigite - Fe3S4) in the pH range of 3.6 to 8.6. ROX removal processes followed a pseudo-second-order kinetic model that was strongly pH dependent. The nitro group of ROX was reduced by structural sulfide rather than dissolved sulfide or ferrous iron to generate an amino-group containing product, 4-hydroxy-3-aminophenylarsonic acid (HAPA). At neutral to alkaline pH values ROX and HAPA are preferentially adsorbed rather than reduced on the Fe3S4 surface. The interaction between ROX and Fe3S4 was minimally affected by interactions with coexisting cations, anions and natural organic matter (humic acid). These novel findings provide new insights for understanding the transformation mechanism of ROX by iron sulfides minerals, and have practical application for designing efficient systems for advanced treatment of ROX.
مجموعه
تاريخ نشر
2017
عنوان
UC Davis
دسترسی و محل الکترونیکی
نام الکترونيکي
مطالعه متن کتاب اطلاعات رکورد کتابشناسی
نوع ماده
[Article]
کد کاربرگه
277683
اطلاعات دسترسی رکورد
سطح دسترسي
a
تكميل شده
Y
