Removal of iron ore slimes from a highly turbid water by DAF

Environmental Technology
L M FaustinoL A Daniel

Abstract

This paper addresses Dissolved Air Flotation (DAF) process variables, such as the flocculation parameters and the recycle water addition, as well as the pretreatment chemical variables (coagulation conditions), to determine the optimal values for the flotation of iron ore slimes found in a highly turbid water sample from the Gualaxo do Norte River, a tributary of the Doce River Basin in Minas Gerais, Brazil. This work was conducted using a flotatest batch laboratory-scale device to evaluate the effectiveness of DAF for cleaning the water polluted by the Samarco tailings dam leakage and determine the ability of DAF to reduce the water turbidity from 358 NTU to values below 100 NTU, aiming to comply with current legislation. The results showed that the four types of tested coagulants (PAC, ferric chloride, Tanfloc SG and Tanfloc SL) provided adequate conditions for coagulation, flocculation and flotation (in the range of 90-99.6% turbidity reduction). Although the process variables were optimized and low residual turbidity vales were achieved, results revealed that a portion of the flocs settled at the bottom of the flotatest columns, which indicated that the turbidity results represented removal caused by a combination of flotat...Continue Reading

References

Sep 5, 2002·Environmental Technology·H MulleneersL Koopal
Jan 26, 2010·Water Research·James K Edzwald
Jul 1, 2010·Environmental Technology·Rita K HendersonBruce Jefferson
Aug 10, 2016·Marine Pollution Bulletin·Martinho Marta-AlmeidaJoão M Dias
Nov 18, 2016·Environmental Technology·Priscila Ribeiro Dos Santos, Luiz Antonio Daniel
May 26, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·A AzevedoJ Rubio

❮ Previous
Next ❯

Methods Mentioned

BETA
electrophoresis

Software Mentioned

Flotatest

Related Concepts

Related Feeds

Blood Clotting Disorders

Thrombophilia includes conditions with increased tendency for excessive blood clotting. Blood clotting occurs when the body has insufficient amounts of specialized proteins that make blood clot and stop bleeding. Here is the latest research on blood clotting disorders.

Related Papers

Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
Yili WangHongxiao Tang
Water Science and Technology : a Journal of the International Association on Water Pollution Research
S B KwonC K Wang
Water Science and Technology : a Journal of the International Association on Water Pollution Research
A P RealiM E de Carvalho
Water Science and Technology : a Journal of the International Association on Water Pollution Research
G R XuG B Li
Water Environment Research : a Research Publication of the Water Environment Federation
Zhen LiangZhenbin Wu
© 2022 Meta ULC. All rights reserved