Efficient removal of Cr(VI) from aqueous solution by natural pyrite/rhodochrosite derived materials: Performance, kinetic and mechanism

被引：14

作者：

Chen, Yaozong ^{[1
]}

Gan, Min ^{[1
]}

He, Peng ^{[1
]}

Zhang, Ke ^{[1
]}

Wang, Xu ^{[1
]}

Zhu, Jinglei ^{[1
]}

Liu, Mengfei ^{[1
]}

Chen, Fang ^{[1
]}

Zhu, Jianyu ^{[1
]}

Xiao, Nengwen ^{[2
]}

机构：

[1] Cent South Univ, Key Lab Biohydromet, Minist Educ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China

[2] Chinese Res Inst Environm Sci, State Environm Protect Key Lab Reg Ecoproc & Func, Beijing 100012, Peoples R China

来源：

ADVANCED POWDER TECHNOLOGY | 2021年 / 32卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Cr(VI) removal; Pyrite; Rhodochrosite; Thermodynamic study; Electrochemical analysis; GRAPHENE OXIDE/FE-MN; X-RAY PHOTOELECTRON; ZERO-VALENT IRON; HEXAVALENT CHROMIUM; WASTE-WATER; ENHANCED REMOVAL; REDOX REACTIONS; HEAVY-METALS; REDUCTION; SULFIDE;

D O I：

10.1016/j.apt.2021.08.032

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this work, pyrite/rhodochrosite (PyxRhy) composite synthesized from natural pyrite and rhodochrosite to remediate Cr(VI) containing wastewater was systematically investigated and evaluated. Results show that pyrite/rhodochrosite (1:1) showed the best Cr(VI) removal performance. XRD showed that emergence of MnS and pyrrhotite contributed to a significant increasing Cr(VI) reduction rate. The estimated maximum adsorption capacity was 95.58 mg/g at pH value of 6, temperature of 303.15 k, which was larger than other iron and manganese-based materials. Additionally, thermodynamic study illuminated that Cr(VI) removal by Py1Rh1 was a spontaneous and endothermic process. Taffel curve and EIS result presented higher corrosion current and lower electrical resistance for Py1Rh1, respectively, which was more favorable for the electron transfer. The surface cyclic regeneration of =Fe(II) and =Mn(II) provided longterm electron transfer to the Cr(VI) reduction. Our results demonstrated the great potentials of natural pyrite and rhodochrosite synthetic materials in the remediation of Cr(VI) polluted water. (C) 2021 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

引用

页码：3814 / 3825

页数：12

共 59 条

[1] Engineered nanomaterials for water treatment and remediation: Costs, benefits, and applicability [J].