RT journal article
T1 Diffusion behavior of humic acid during desalination with air gap and water gap membrane distillation
A1 Amaya Vias, David
A1 López Ramírez, Juan Antonio
A1 Gray, Stephen
A1 Zhang, Jianhua
A1 Duke, Mikel
A2 Anatomía PatológicaBiología Celular, Histología, Historia de la Ciencia, Medicina Legal y Forense y Toxicología
A2 Tecnologías del Medio Ambiente
K1 Humic acid
K1 Humic acid Air gap membrane distillation
K1 Water gap membrane distillation
K1 Organic matter
K1 Diffusion
K1 Seawater
AB Desalination and water reuse are important means to resolve local water scarcity and security issues worldwide where membrane distillation (MD) may be part of a solution. Natural organic matter and in particular, humic acids (HA), are widely present in water supplies to be treated but exhibit little understood behavior to diffuse through MD membranes into permeate. In this work, air gap (AGMD) andwater gap (WGMD) were utilized to study HA behavior in MD using seawater and synthetic water over a range of typical MD temperatures, flow rates and membrane types. HA diffusion was first shown with seawater feed then on synthetic solutions at all process conditions. While electrical conductivity rejection was always above than 99%, HA rejection showed values of 33% and 90% for AGMD and 68% and 93%for WGMD with seawater and synthetic water, respectively. Analytical techniques were used to perform a preliminary organic matter characterization in permeate, obtaining clear differences between the feed and permeate HA property. Compared to hydrophobic membranes, uniquely oleophobic membranes inhibit HA diffusion suggesting hydrophobic surface diffusion of HA through the membrane. HA flux aswell as potential undesirable effects of the organic matter in permeate should be considered for MD applications.
PB Elsevier
SN 0043-1354
YR 2019
FD 2019
LK http://hdl.handle.net/10498/30480
UL http://hdl.handle.net/10498/30480
LA eng
NO Universidad de Cádiz por un contrato predoctoral de formación de personal investigador (ref. 2015-036/PU/EPIF-FPI-CT/CP).A las empresas Leslie Naidoo of Australian Textile Mills y Bart Nelemans of Aquastill por proporcionar membranas para desarrollar el artículo.
DS Repositorio Institucional de la Universidad de Cádiz
RD 10-nov-2026