PHYTOREMEDIATION OFFERS ANATURAL SOLUTION FOR POLLUTION

摘要

Phytoremediation is a concept involving the use of plants to remove chemical contaminants in a biomatrix,rnsometimes referred to as a biofilter. Understanding plant use of nutrients, and the use ofrnappropriate soil additives can accelerate plant root growth, mobilize metals and hydrocarbons, andrnimprove plant toughness and growth rates. Design of the biofilter may include tiers using different typesrnof grasses and other plants to encourage different nutrient uptake and/or to accelerate evapotranspiration.rnDesign of phyto-remediation systems consists of several simple steps to encourage the plants to maximizerntheir uptake, and ongoing maintenance activities to insure that the uptake is properly realized. Thesernsteps include identifying the contaminants of concern, appropriate cultivars or plants for the locale and forrnthe contaminants, needed soil nutrients to mobilize and/or breakdown the contaminants and appropriaternaeration capacity. Waste water products may include reclaimed water, storm water or industrial wastes.rnStorm water may contain many nutrients required by plants, as well as hydrocarbons and less desirablernconstituents. In saltwater intruded areas, more options exist for reverse osmosis concentrate disposal.rnImplementation of this concept has occurred to treat wash water and pesticide residue on golf courses, isrnbeing considered for remediating of farming operations, concentrate disposal and stormwater. Thernvariations of the concept protect groundwater and meet Best Management Practice requirements.