Preventing biofilm development on DGT devices using metals and antibiotics

Simultaneous measurements of As, Mo, Sb, V and W using a ferrihydrite diffusive gradients in thin films (DGT) device

“…Similar Table 4 Maximum and miminum DOC and conductivity measured in the upstream and downstream sampling points both years of sampling. effects have been seen to result from biofilm development due to algal growth, and suspended materials adhered to the DGT and protective filter [21]. In nutrient-rich fishery farms, where phosphate measurements were conducted, biofilms were detected for deployments lasting longer than seven days, and after 14 days, adhesion of suspended materials became problematic.…”

Mid-Infrared Sensing of Organic Pollutants in Aqueous Environments

“…Recent studies by Scardino et al [61] have shown that the micro-textured structure of polycarbonate is responsible for impeding the attachment of certain microorganisms and by carefully tailoring the surface it can be used to alleviate biofouling problems. By contrast, the review by Genzer and Efimenko [62] highlights the importance of superhydrophobic surface preparation in addressing this issue, whereas Pichette and coworkers suggest the use of silver and copper metals in preventing biofilm formation and algal growth [63]. The anti-fouling properties of various antibiotics (i.e., glutaraldehyde and chloramphenicol) have also been evaluated; however, these appear to be less effective in minimizing the growth of algae over longer periods of time [63].…”

“…By contrast, the review by Genzer and Efimenko [62] highlights the importance of superhydrophobic surface preparation in addressing this issue, whereas Pichette and coworkers suggest the use of silver and copper metals in preventing biofilm formation and algal growth [63]. The anti-fouling properties of various antibiotics (i.e., glutaraldehyde and chloramphenicol) have also been evaluated; however, these appear to be less effective in minimizing the growth of algae over longer periods of time [63]. Undoubtedly, the mechanism of biofilm formation is complex which seems to depend on a wide range of factors (i.e., type of microorganism, water composition, environmental conditions, material composition/structure, etc).…”

Diffusive gradients in thin films: devices, materials and applications

“…of the DGT device (Li et al 2005a). To overcome this problem, Pichette et al (2007) utilized antibiotics, copper and silver to pretreat the filter membrane, respectively. The results showed that copper and silver could prevent algal colonization within 14 days after DGT deployment.…”

“…The piston-type DGT device has been in situ deployed in water by several ways. The DGT devices can be attached to a buoy with fishing line (Pichette et al 2007); multiple devices can be fixed into a polyhedral structure (the device exposure windows outward) (Guo et al 2017a;Zheng et al 2015); the devices can be fixed on plastic mesh strips or in the middle of two plexiglass plate (Lucas et al 2014;Uher et al 2017).…”