Backcountry Forum
Backpacking & Hiking Gear

Backcountry Forum
Our long-time Sponsor - the leading source for ultralite/lightweight outdoor gear
 
 
 
BCG Holiday Sale

Amazon.com
Backpacking Forums
BackcountryGear.com
backcountry gear

---- Our Gear Store ----
The Lightweight Gear Store
 
 WINTER CAMPING 

Shelters
Bivy Bags
Sleeping Bags
Sleeping Pads
Snow Sports
Winter Kitchen

 SNOWSPORTS 

Snowshoes
Avalanche Gear
Skins
Hats, Gloves, & Gaiters
Accessories

 ULTRA-LIGHT 

Ultralight Backpacks
Ultralight Bivy Sacks
Ultralight Shelters
Ultralight Tarps
Ultralight Tents
Ultralight Raingear
Ultralight Stoves & Cookware
Ultralight Down Sleeping Bags
Ultralight Synthetic Sleep Bags
Ultralight Apparel


the Titanium Page
WM Extremelite Sleeping Bags

 CAMPING & HIKING 

Backpacks
Tents
Sleeping Bags
Hydration
Kitchen
Accessories

 CLIMBING 

Ropes & Cordage
Protection & Hardware
Carabiners & Quickdraws
Climbing Packs & Bags
Big Wall
Rescue & Industrial

 MEN'S APPAREL 

Jackets
Shirts
Baselayer
Headwear
Gloves
Accessories

 WOMEN'S APPAREL 

Jackets
Shirts
Baselayer
Headwear
Gloves
Accessories

 FOOTWEAR 

Men's Footwear
Women's Footwear

 CLEARANCE 

Backpacks
Mens Apparel
Womens Apparel
Climbing
Footwear
Accessories

 BRANDS 

Black Diamond
Granite Gear
La Sportiva
Osprey
Smartwool

 WAYS TO SHOP 

Sale
Clearance
Top Brands
All Brands

 Backpacking Equipment 

Shelters
BackPacks
Sleeping Bags
Water Treatment
Kitchen
Hydration
Climbing


 Backcountry Gear Clearance


Stay Healthy--Eat Well

MARY JANES FARM ORGANIC MEALS

Mary Janes Farm Organic Backcountry Meals

NATURAL HIGH GOURMET MEALS

Natural High

 

Topic Options
Rate This Topic
#181342 - 12/16/13 10:17 PM Lightweight Water Treatment Backup
billstephenson Offline
Moderator

Registered: 02/07/07
Posts: 3915
Loc: Ozark Mountains in SW Missouri
It's been my feeling that if you use chlorine dioxide you should filter the water afterwards and I once recommended that using an activated charcoal filter would remove the chlorine. There was some discussion here on that, and the general consensus, as I recall, was that it would not remove it.

That's sort stuck with me because I know it removes the taste of chlorine and after reading about what happened to OM with her Sawyer Squeeze locking up I started thinking about this some more.

So I started looking today for what an activated charcoal filter actually does removes that tastes like chlorine. From what I found, it actually does remove chlorine pretty good, there is a time factor involved though. The longer the water is in contact with the activated charcoal the better it works. Here's what I've been reading:

www.ianrpubs.unl.edu 1

www.ianrpubs.unl.edu 2

www1.agric.gov.ab.ca


So, based on that I think pretreating with chlorine dioxide and then using an activated charcoal filter is probably a pretty safe, inexpensive, and lightweight method to treat water for our purposes. But more to the point is that even if you carry a filter this makes a good back-up system. Just a few tablets of chlorine dioxide and one of these Dollar Store lightweight collapsable bottles with an inexpensive Britta activated charcoal filter inside them is cheap and light, and it could save a trip:



This also works great to pre-filter and boil water. Boiling water is really all you need, but this way sure beats nasty tasting water that crunches between your teeth wink
_________________________
--

"You want to go where?"



Top
#181348 - 12/16/13 11:43 PM Re: Lightweight Water Treatment Backup [Re: billstephenson]
Rick_D Offline
member

Registered: 01/06/02
Posts: 2802
Loc: NorCal
Oh yes, carbon definitely removes free chlorine--I have a big undersink filter in the kitchen primarily for that--and an A/B comparison with unfiltered water can be night/day, depending on the season and how much they're chlorinating. Takes out all sorts of organics, too.

Since I can usually taste/smell ClO2 in treated water, polishing it with carbon makes perfect sense (scents?).

Cheers,
_________________________
--Rick

Top
#181350 - 12/17/13 02:46 AM Re: Lightweight Water Treatment Backup [Re: Rick_D]
OregonMouse Online   content
member

Registered: 02/03/06
Posts: 6490
Loc: Gateway to Columbia Gorge
Be sure to leave the chlorine in the water long enough to do its job! That could be up to 4 hours if the water is cold and really turbid!
_________________________
May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey

Top
#181357 - 12/17/13 10:33 AM Re: Lightweight Water Treatment Backup [Re: Rick_D]
lori Offline
member

Registered: 01/22/08
Posts: 2801
Chlorine dioxide isn't the same as the chlorine used in tap water...
_________________________
"In the beginner's mind there are many possibilities. In the expert's mind there are few." Shunryu Suzuki

http://hikeandbackpack.com

Top
#181359 - 12/17/13 12:36 PM Re: Lightweight Water Treatment Backup [Re: billstephenson]
BZH Offline
member

Registered: 01/26/11
Posts: 895
Loc: Torrance, CA
I have been thinking about this some recently. No one seems willing to tell us how effective these Brita type filters are at removing things but that doesn't mean they are not effective. I think the facts are that they do not filter out the bugs that make us sick so companies are very leery of making promises about what they can do lest they be sued when someone uses it as their sole water treatment.

The fact is activated carbon is very effective at bonding to and neutralizing a lot of pollutants in water that might not make you sick right away but could over a long period of drinking them. If you ingest poison one of the more common treatments is a little capsule of activated carbon. How can that little capsule be effective at saving my life when I directly ingest poison but an entire tube of it be worthless for treating mildly polluted water?

With CLO2 I think the proof is in the taste. If much of the CLO2 taste is removed with carbon treatment, then it is probably a pretty effective treatment.

A more serious issue came up over at BPL: that of blue-green algae aka cyanobacteria. Standard water treatments will kill cyanobacteria but none of them (filter, clo2, steripen, boiling) will remove the toxins they produce. If you get cyanobacterial poisoning, the treatment is activated carbon, but I can find no guidance on using the activated carbon to treat the water before you drink it.

So... I suspect those little brita filters could be very useful but I have no direct information at just how useful they are.

Top
#181360 - 12/17/13 12:46 PM Re: Lightweight Water Treatment Backup [Re: lori]
Rick_D Offline
member

Registered: 01/06/02
Posts: 2802
Loc: NorCal
Originally Posted By lori
Chlorine dioxide isn't the same as the chlorine used in tap water...

True, and my hunch is the carbon will adsorb either. This may call for an experiment or three.

Cheers,
_________________________
--Rick

Top
#181361 - 12/17/13 12:49 PM Re: Lightweight Water Treatment Backup [Re: OregonMouse]
Rick_D Offline
member

Registered: 01/06/02
Posts: 2802
Loc: NorCal
Originally Posted By OregonMouse
Be sure to leave the chlorine in the water long enough to do its job! That could be up to 4 hours if the water is cold and really turbid!


Yes, it should be considered a "polishing" step to improve taste and odor, not part of the actual treatment regimen. And hopefully, turbidity has been addressed by prefiltering or flocculation.

Cheers,
_________________________
--Rick

Top

Shout Box

Highest Quality Lightweight Down Sleeping Bags
 
Western Mountaineering Sleeping Bags
 
Lite Gear Talk - Featured Topics
Trail Running shoes with good support
by pdslates
06/14/18 03:48 PM
ZIPLOCK TOILET PAPER DISPENSER
by PerryMK
06/14/18 10:12 AM
Help neede with clothing
by SQWIB
06/07/18 01:41 PM
Backcountry Discussion - Featured Topics
Alice Pak
by Capt hook
01:13 PM
Hello
by Capt hook
01:07 PM
Rain gear for tall people...help!!
by willie1280
06/11/18 12:57 PM
Make Your Own Gear - Featured Topics
Homemade Potty Trowel
by 4evrplan
04/23/16 12:04 AM
creating fill marks on titanium cookware
by the-gr8t-waldo
07/18/15 05:19 PM
Featured Photos
Breakneck Ridge, New York
May 2012 Eclipse, Lassen Park
New Years Eve 2011
Trip Report with Photos
Seven Devils, Idaho
Oat Hill Mine Trail 2012
Dark Canyon - Utah
Who's Online
1 registered (), 48 Guests and 0 Spiders online.
Key: Admin, Global Mod, Mod
Newest Members
Capt hook, dhri, pdslates, Prainz, seabass199
12589 Registered Users
Forum Links
Disclaimer
Policies
Site Links
HOME
Backpacking.net
Family Hiking
Lightweight Gear Store
Backpacking Book Store
Lightweight Zone
Hiking Essentials

Outdoor Gear Daily Deals
Outlets, Sales, Bargains

Our long-time Sponsor, BackcountryGear.com - The leading source for ultralite/lightweight outdoor gear:

Backcountry Forum
 
 

Since 1996 - the Original Backcountry Forum
Copyright © The Lightweight Backpacker & BackcountryForum.com