Volume per gram of activated carbon particles inside the pores called pore volume. Activated carbon is a porous material due to its adsorption performance was mainly due to its well-developed pore structure of activated carbon, and therefore the measurement of pore volume of activated carbon adsorption properties of activated carbon is characterized by another important indicator. Specific test in two ways: one is by measuring the true density of activated carbon and particle density obtained; the other is measured by nitrogen adsorption. 1. A method of measuring the true density of activated carbon and particle density: the true density is the weight of under specified conditions, excluding voids between the particles and the pore volume per unit volume of the carbon. The true density is generally measured with helium because helium can better penetrate into smaller pores in the activated carbon to. The particle density is defined under predetermined conditions, including the pore volume, but not including the voids between the particles per unit volume of activated carbon weight. Decolorizing charcoal particle density determination by mercury displacement method, because under atmospheric pressure, mercury can only fill the interstices between the particles of activated carbon. Deducted from the packing density of mercury displacement volume, you get activated carbon particle density. 2, the method of calculating the pore volume of the activated carbon by the true density and particle density: the reciprocal true density difference between the reciprocal of the particle density may reflect the size of the pore volume of the activated carbon. Ozone, coconut shell activated carbon treatment, coconut shell activated carbon regeneration not been carried out for six consecutive years of continuous treatment to remove the results of trihalomethane precursors clear. In such a long period of time, can stably remove 60% -80% of the original water THM precursor substances. When only coconut shell activated carbon treatment time increased later, can remove about 20% of trihalomethane precursors. This result represents the activated carbon adsorption of gold, even in use can be considered within the coconut shell activated carbon adsorption capacity has been reduced as a long period, coconut shell activated carbon processing in biological activated carbon air purification, through the action of biological, make coconut shell activated carbon also long-term used. On the other hand, Kim et al., Reported that even in the class of humins naturally occurring organic matter has penetrated the biological coconut shell activated carbon, it is possible to completely remove the 24 hours of continuous inflow of Australia on behalf of phenol by adsorption . Even long-term use of biological coconut shell activated carbon, for the waterways is problematic in terms of the extent that the trace organic compounds, like still maintain a certain degree of adsorption capacity. It follows that biological pesticides like coconut shell activated carbon to remove organic compounds are effective long-term. And, reportedly, on the variation of the original precursors also have long-term effects of continuous removal. Gold activated carbon, Song Xin peach shell activated carbon filter (certified), Jinju charcoal provided by Gongyi City Song Xin Industrial Co. filter. Gongyi City Song Xin Industrial Co. filter (www.sxlc.com) is Zhengzhou, cleaning, cleaning equipment leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Song Xin filter in leadership with the staff warmly welcome all inquiries negotiations to create Song Xin filter a better future.