New PDF release: Groundwater Arsenic Remediation: Treatment Technology and

By Parimal Pal

Arsenic abatement from groundwater in destinations with a important water distribution procedure is comparatively uncomplicated. the true problem is choosing the best and cheap remedy and scale up choice for destinations which lack the right infrastructure. Groundwater Arsenic Remediation: remedy know-how and Scale UP offers the most recent step forward groundwater therapy applied sciences and modeling and simulation equipment for undertaking scale up and at last box deployment in destinations which lack the right kind valuable water distribution approach to make sure arsenic loose groundwater.

  • Covers different elimination tools, reminiscent of chemical, adsorption, separation by way of membranes, and membrane distillation
  • Includes the state of the art modeling & simulation tools for optimization and box deployment
  • Provides financial and comparative research of every arsenic remedy technology

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Extra resources for Groundwater Arsenic Remediation: Treatment Technology and Scale UP

Sample text

Separation of arsenic in the process depends on a number of interdependent phenomena like formation of precipitates, coprecipitates, mixed precipitates, adsorption of inorganic arsenic species onto the metal hydroxides, enmeshment, and settling. Because it is very difficult to experimentally uncouple the effect of one phenomenon from the other, the initial wide gap between model predictions and experimental Chemical Treatment Methods in Arsenic Removal 55 findings cannot be captured mathematically.

1. 7 Performance of the system and the model The dynamic mathematical model is developed to predict, a priori, performance of a physico-chemical arsenic separation plant. The model is validated against the experimental data using parameter values determined either experimentally or through standard empirical relations. Separation efficiency of 91–92% is achieved in the scheme. The parameters like coagulant dose, oxidant dose, and feed concentration are found to have a significant impact on arsenic removal efficiency.

3 Enmeshment-precipitation In this case, added metal salts such as aluminum sulfate, ferric chlorides, calcium oxides, and so on precipitate as hydroxides, in which the colloidal particles get enmeshed and coprecipitate. 4 Interparticle bridging Lamer (1963) proposed this mechanism where some long chain charged polymeric molecules are added to a colloidal system. One charged end of the polymer molecule attaches to a site of the colloid and the other end extends to the bulk solution. If the other end attaches to another colloidal particle then an effective bridging between two colloidal particles takes place, resulting in their settling together.

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