7/23/2019 Lembar Pengesahan PKM P

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ABSTRACT

Arsenic is one of WHOs 10 chemicals of major public health concern. The greatest threat to public health from arsenicoriginates from contaminated groundwater. Two forms are common in groundwater: arsenite AsO !

!"# and arsenate

AsO$!"#% referred to as arsenic&& and arsenic'#. One of the most well()nown method of arsenic remediation is

adsorption. Titanium dio*ide TiO+# can be used as an absorbent to remo,e arsenic. -orption capacit of di/erent

polmorph TiO+ depends on sorption site densit% surface area% particle sie% surface energ% crstallinit and

crstalline structure% all these parameters depends on particle preparation techniue. 2an di/erent preparationmethods ha,e been described in order to obtain high(performance TiO+ nanoparticles% including hdrothermal

methods. This method is commonl used to grow large good(ualit crstals and highl homogeneous nanoparticle.'arious parameters had been studied in order to get the better product li)e temperature% e*perimental duration%pressure percentage 3ll#% pH% molar ratio of the starting materials% and sol,ent tpe. The preparation of TiO+nanocrstal will be carried out using ,arious concentration of acid and base sol,ents using hdrothermal method.-nthesied materials will be characteried and calculated using *(ra di/raction% -42 -canning 4lectron 2icroscope#and 5runauer(4mmett(Teller 54T# surface area theor respecti,el% whilst sorption data will be interpreted in terms ofthe 6reundlich and 7angmuir euations. This research is e*pected to obtain the optimal concentration of the sol,entsto produce high purit TiO+ crstals for photocataltic purpose.

Keywords: hdrothermal method% nanocrstalline TiO+% photocatalst TiO+% arsenic sorption

Ti(OH)4(s)

METHODOLOGY

TiCl4(aq) (3 mL) Aqua bidest (25 mL)

Ice-water bath (2oC)

H2O4 (25 mL)

!ar"

co#ce#tratio#

($%& $"5%& 2%)

HCl(25 mL)

!ar"

co#ce#tratio#

($%& $"5%& 2%)

'aOH(25 mL)

!ar"

co#ce#tratio#

($%& $"5%& 2%)

'aOH(25 mL)

!ar"

co#ce#tratio#

($%& $"5%& 2%)tirred or 45 mi#

at *oC

tirred or 45 mi#

at *oC

tirred or 45 mi#

at *oC

tirred or 45 mi#

at *oCadded 'H3"H2O

u#til the +H !alue

reached about ,

added 'H3"H2O

u#til the +H !alue

reached about ,

added 'H3"H2O

u#til the +H !alue

reached about ,

added 'H3"H2O

u#til the +H !alue

reached about ,

reci+itatio# reci+itatio# reci+itatio# reci+itatio#

mo!ed to telo#-li#ed autocla!e

heated at $*oC or 24 h

.esidue /iltrat

washed with A0'O3

calci#ated at **oC or 2 h

TiO2 #a#ocr1stals

characteried with . a#d %

i#!esti0ated the +hotocatal1tic acti!it1

throu0h As remo!al

.esult

Tefon-lined Autocl!e

RE"ERE#CES819 upta% ;. ;.%