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Niltonin kirje Perusta 27.4.2007




HI HEINO
ALL OF YOU GUYS ARE IN VERY BAD PROBLEMS I GUESS
I´L TRY TO ANWSER YOUR QUESTIONS.

IN TROPICAL COUNTRIES THE WEATHER DOES NOT CHANGE IN
THE YEAR. EVEN THOUGH WINTER IS WARMER AND VACATION
TIME.
MAYBE YOU NEED TO HAVE SOME ADDITIONAL ANALYSES TO DO.
I MEAN, TO KNOW THE CHEMICAL SPECIES OF Hg YOU HAVE IN
THE SEDIMENTS.
METAL (OR ELEMENTAL) Hg IS THE LESS DANGEROUS OF ALL
THESE SPECIES.
MeHg, AS YOU KNOW ALREADY, THE WORST

BUT, SALTS FROM Hg (WITH 02, Cl2, ETC) CAN HARM THE
DIGESTIVE SYSTEM.
I COULD GUESS THAT THE MERCURY ANALYZED IS TOTAL (THE
SUM OF ALL THE MERCURY SPECIES IN THE SEDIMENTS OF THE
RIVER)
HOLLAND LEVEL OF 0,01 PPM (MICROGRAMS/LITRE) IS
REAZONABLE IN WATER SINCE THE WATER IS USED DIRECTLY
IN IRRIGATION, DRINKING WATER OR FOR CATTLE. THE SAME
LEVEL USED TO BE IN US-EPA STANDARDS. BUT AS LONG I
CAN UNDERSTAND, THEY LOWERED THESE VALUES TO ZERO.

THE SOIL (ACCORDING TO ITS CHEMICAL COMPOSITION) IS
ABLE TO PURIFY THE WATER OUT OF HEAVY METALS, BUT SOME
CONDITIONS ARE NECESARY:
1. THE GROUND WHERE THE WATER GOES TROUGHT, WILL BE
THIK
2. THE COMPOSITION OF THE GROUND SHOULD BE OF ALKALY
COMPOSSITION, RECOMMENDABLE
3. THE BACTERIA OF THE SOIL CAN ADSORBE HEAVY METALS
(BUT THE SATTURATION POIT IS REACH EASYLY)

I JUST VISITED A ORMOSIS REVERSE PLANT IN SALEM
(OREGON CAPITAL IN USA). THE COST WAS VERY HIGH: 75
MILLION DOLLARS FOR PURIFYING PIPING WATER FOR 800,000
PEOPLE.
MINERA YANACOCHA IS USING THE SAME SYSTEM IN
CAJAMARCA. I´L TRY TO GET THIS INFORMATION

NATURE IS SMART, BUT IT´S NOT ENOUGH IF THE EMITION OF
TOXICANTS ARE HIGH AND LONG IN THE TIME.

IN THE WORLD, CURRENTLY THE WORST GROUNDWATER
CONTAMINATION ARE FOR NITATES, HEAVY METALS AND
PESTICIDES (IN THIS ORDER).

AS LONG I KNOW, SWEDEN AND JAPAN ARE FIGHTING WITH
THIS KIND OF POLLUTION NOWADAYS (HEAVY METALS
CONTAMINATION)

GROUNDWATER POLLUTION IS A SERIOUS ISSUE, SINCE CLEAN
ACTIVITIES ARE SO EXPENSIVE.

THIS IS COMMON. MY M SC DEDREE THESIS IN ORTEGON STATE
UNIVERSITY WAS ON MERCURY CONTENT IN FISH FLESH FROM
THE AMAZONIA WHERE PEOPLE USE Hg FOR AMALGAMATION TO
EXTRACT GOLD FROM THE SANDS.

AS YOU PROBABLY KNOW, THE TOP PREDATOR (TUNA, SHARKS
AND SO ON) HAVE THE HIGHEST MERCURY LEVELS BECAUSE THE
MAGNIFICATION OF THE Hg IN THE FOOD CHAIN.

FINALLY, I´M TRAVELING TO ST PETERSBURG FOR MAY 24 -
27 AND I WILL BE HAPPY OF VISITING YOU, BUT I DO NOT
HAVE FOUNDS FOR THIS ADDITIONAL TRAVEL.

SINCERELY YOURS, NILTON

Nilton Deza Arroyo
P.O.Box 115 Cajamarca Peru
Address: Prol.Loreto 104 Sta. Apolonia Cajamarca
Phone: (0051) 76- 369641
Office: Universidad Nacional de Cajamarca
Escuela de Post Grado
TeleFax: (0051) 76- 365973



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